xrdp-proprietary/common/os_calls.c

/**
 * xrdp: A Remote Desktop Protocol server.
 *
 * Copyright (C) Jay Sorg 2004-2014
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * generic operating system calls
 *
 * put all the os / arch define in here you want
 */

/* To test for Windows (64 bit or 32 bit) use _WIN32 and _WIN64 in addition
   for 64 bit windows.  _WIN32 is defined for both.
   To test for Linux use __linux__.
   To test for BSD use BSD */

#if defined(HAVE_CONFIG_H)
#include "config_ac.h"
#endif
#if defined(_WIN32)
#include <windows.h>
#include <winsock.h>
#else
/* fix for solaris 10 with gcc 3.3.2 problem */
#if defined(sun) || defined(__sun)
#define ctid_t id_t
#endif
#include <unistd.h>
#include <errno.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/time.h>
#include <sys/times.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <dlfcn.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <signal.h>
#include <fcntl.h>
#include <pwd.h>
#include <time.h>
#include <grp.h>
#endif

#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <locale.h>

/* this is so we can use #ifdef BSD later */
/* This is the recommended way of detecting BSD in the
   FreeBSD Porter's Handbook. */
#if (defined(__unix__) || defined(unix)) && !defined(USG)
#include <sys/param.h>
#endif

#include "os_calls.h"
#include "arch.h"
#include "log.h"

/* for clearenv() */
#if defined(_WIN32)
#else
extern char **environ;
#endif

#if defined(__linux__)
#include <linux/unistd.h>
#endif

/* for solaris */
#if !defined(PF_LOCAL)
#define PF_LOCAL AF_UNIX
#endif
#if !defined(INADDR_NONE)
#define INADDR_NONE ((unsigned long)-1)
#endif

static char g_temp_base[128] = "";
static char g_temp_base_org[128] = "";

/*****************************************************************************/
int APP_CC
g_rm_temp_dir(void)
{
    if (g_temp_base[0] != 0)
    {
        if (!g_remove_dir(g_temp_base))
        {
            printf("g_rm_temp_dir: removing temp directory [%s] failed\n", g_temp_base);
        }

        g_temp_base[0] = 0;
    }

    return 0;
}

/*****************************************************************************/
int APP_CC
g_mk_temp_dir(const char *app_name)
{
    if (app_name != 0)
    {
        if (app_name[0] != 0)
        {
            if (!g_directory_exist("/tmp/.xrdp"))
            {
                if (!g_create_dir("/tmp/.xrdp"))
                {
                    /* if failed, still check if it got created by someone else */
                    if (!g_directory_exist("/tmp/.xrdp"))
                    {
                        printf("g_mk_temp_dir: g_create_dir failed\n");
                        return 1;
                    }
                }

                g_chmod_hex("/tmp/.xrdp", 0x1777);
            }

            snprintf(g_temp_base, sizeof(g_temp_base),
                     "/tmp/.xrdp/%s-XXXXXX", app_name);
            snprintf(g_temp_base_org, sizeof(g_temp_base_org),
                     "/tmp/.xrdp/%s-XXXXXX", app_name);

            if (mkdtemp(g_temp_base) == 0)
            {
                printf("g_mk_temp_dir: mkdtemp failed [%s]\n", g_temp_base);
                return 1;
            }
        }
        else
        {
            printf("g_mk_temp_dir: bad app name\n");
            return 1;
        }
    }
    else
    {
        if (g_temp_base_org[0] == 0)
        {
            printf("g_mk_temp_dir: g_temp_base_org not set\n");
            return 1;
        }

        g_strncpy(g_temp_base, g_temp_base_org, 127);

        if (mkdtemp(g_temp_base) == 0)
        {
            printf("g_mk_temp_dir: mkdtemp failed [%s]\n", g_temp_base);
        }
    }

    return 0;
}

/*****************************************************************************/
void APP_CC
g_init(const char *app_name)
{
#if defined(_WIN32)
    WSADATA wsadata;

    WSAStartup(2, &wsadata);
#endif
    setlocale(LC_CTYPE, "");
    g_mk_temp_dir(app_name);
}

/*****************************************************************************/
void APP_CC
g_deinit(void)
{
#if defined(_WIN32)
    WSACleanup();
#endif
    g_rm_temp_dir();
}

/*****************************************************************************/
/* allocate memory, returns a pointer to it, size bytes are allocated,
   if zero is non zero, each byte will be set to zero */
void *APP_CC
g_malloc(int size, int zero)
{
    char *rv;

    rv = (char *)malloc(size);

    if (zero)
    {
        if (rv != 0)
        {
            memset(rv, 0, size);
        }
    }

    return rv;
}

/*****************************************************************************/
/* free the memory pointed to by ptr, ptr can be zero */
void APP_CC
g_free(void *ptr)
{
    if (ptr != 0)
    {
        free(ptr);
    }
}

/*****************************************************************************/
/* output text to stdout, try to use g_write / g_writeln instead to avoid
   linux / windows EOL problems */
void DEFAULT_CC
g_printf(const char *format, ...)
{
    va_list ap;

    va_start(ap, format);
    vfprintf(stdout, format, ap);
    va_end(ap);
}

/*****************************************************************************/
void DEFAULT_CC
g_sprintf(char *dest, const char *format, ...)
{
    va_list ap;

    va_start(ap, format);
    vsprintf(dest, format, ap);
    va_end(ap);
}

/*****************************************************************************/
void DEFAULT_CC
g_snprintf(char *dest, int len, const char *format, ...)
{
    va_list ap;

    va_start(ap, format);
    vsnprintf(dest, len, format, ap);
    va_end(ap);
}

/*****************************************************************************/
void DEFAULT_CC
g_writeln(const char *format, ...)
{
    va_list ap;

    va_start(ap, format);
    vfprintf(stdout, format, ap);
    va_end(ap);
#if defined(_WIN32)
    g_printf("\r\n");
#else
    g_printf("\n");
#endif
}

/*****************************************************************************/
void DEFAULT_CC
g_write(const char *format, ...)
{
    va_list ap;

    va_start(ap, format);
    vfprintf(stdout, format, ap);
    va_end(ap);
}

/*****************************************************************************/
/* produce a hex dump */
void APP_CC
g_hexdump(char *p, int len)
{
    unsigned char *line;
    int i;
    int thisline;
    int offset;

    line = (unsigned char *)p;
    offset = 0;

    while (offset < len)
    {
        g_printf("%04x ", offset);
        thisline = len - offset;

        if (thisline > 16)
        {
            thisline = 16;
        }

        for (i = 0; i < thisline; i++)
        {
            g_printf("%02x ", line[i]);
        }

        for (; i < 16; i++)
        {
            g_printf("   ");
        }

        for (i = 0; i < thisline; i++)
        {
            g_printf("%c", (line[i] >= 0x20 && line[i] < 0x7f) ? line[i] : '.');
        }

        g_writeln("");
        offset += thisline;
        line += thisline;
    }
}

/*****************************************************************************/
void APP_CC
g_memset(void *ptr, int val, int size)
{
    memset(ptr, val, size);
}

/*****************************************************************************/
void APP_CC
g_memcpy(void *d_ptr, const void *s_ptr, int size)
{
    memcpy(d_ptr, s_ptr, size);
}

/*****************************************************************************/
int APP_CC
g_getchar(void)
{
    return getchar();
}

/*****************************************************************************/
/*Returns 0 on success*/
int APP_CC
g_tcp_set_no_delay(int sck)
{
    int ret = 1; /* error */
#if defined(_WIN32)
    int option_value;
    int option_len;
#else
    int option_value;
    unsigned int option_len;
#endif

    option_len = sizeof(option_value);

    /* SOL_TCP IPPROTO_TCP */
    if (getsockopt(sck, IPPROTO_TCP, TCP_NODELAY, (char *)&option_value,
                   &option_len) == 0)
    {
        if (option_value == 0)
        {
            option_value = 1;
            option_len = sizeof(option_value);

            if (setsockopt(sck, IPPROTO_TCP, TCP_NODELAY, (char *)&option_value,
                           option_len) == 0)
            {
                ret = 0; /* success */
            }
            else
            {
                g_writeln("Error setting tcp_nodelay");
            }
        }
    }
    else
    {
        g_writeln("Error getting tcp_nodelay");
    }

    return ret;
}

/*****************************************************************************/
/*Returns 0 on success*/
int APP_CC
g_tcp_set_keepalive(int sck)
{
    int ret = 1; /* error */
#if defined(_WIN32)
    int option_value;
    int option_len;
#else
    int option_value;
    unsigned int option_len;
#endif

    option_len = sizeof(option_value);

    /* SOL_TCP IPPROTO_TCP */
    if (getsockopt(sck, SOL_SOCKET, SO_KEEPALIVE, (char *)&option_value,
                   &option_len) == 0)
    {
        if (option_value == 0)
        {
            option_value = 1;
            option_len = sizeof(option_value);

            if (setsockopt(sck, SOL_SOCKET, SO_KEEPALIVE, (char *)&option_value,
                           option_len) == 0)
            {
                ret = 0; /* success */
            }
            else
            {
                g_writeln("Error setting tcp_keepalive");
            }
        }
    }
    else
    {
        g_writeln("Error getting tcp_keepalive");
    }

    return ret;
}

/*****************************************************************************/
/* returns a newly created socket or -1 on error */
/* in win32 a socket is an unsigned int, in linux, its an int */
int APP_CC
g_tcp_socket(void)
{
    int rv;
    int option_value;
#if defined(_WIN32)
    int option_len;
#else
    unsigned int option_len;
#endif

#if defined(XRDP_ENABLE_IPV6) && !defined(NO_ARPA_INET_H_IP6)
    rv = (int)socket(AF_INET6, SOCK_STREAM, 0);
#else
    rv = (int)socket(AF_INET, SOCK_STREAM, 0);
#endif
    if (rv < 0)
    {
        return -1;
    }
#if defined(XRDP_ENABLE_IPV6) && !defined(NO_ARPA_INET_H_IP6)
    option_len = sizeof(option_value);
    if (getsockopt(rv, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&option_value,
                   &option_len) == 0)
    {
        if (option_value != 0)
        {
            option_value = 0;
            option_len = sizeof(option_value);
            if (setsockopt(rv, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&option_value,
                       option_len) < 0)
            {
                log_message(LOG_LEVEL_ERROR, "g_tcp_socket: setsockopt() failed\n");
            }
        }
    }
#endif
    option_len = sizeof(option_value);
    if (getsockopt(rv, SOL_SOCKET, SO_REUSEADDR, (char *)&option_value,
                   &option_len) == 0)
    {
        if (option_value == 0)
        {
            option_value = 1;
            option_len = sizeof(option_value);
            if (setsockopt(rv, SOL_SOCKET, SO_REUSEADDR, (char *)&option_value,
                       option_len) < 0)
            {
                log_message(LOG_LEVEL_ERROR, "g_tcp_socket: setsockopt() failed\n");
            }
        }
    }

    option_len = sizeof(option_value);

    if (getsockopt(rv, SOL_SOCKET, SO_SNDBUF, (char *)&option_value,
                   &option_len) == 0)
    {
        if (option_value < (1024 * 32))
        {
            option_value = 1024 * 32;
            option_len = sizeof(option_value);
            if (setsockopt(rv, SOL_SOCKET, SO_SNDBUF, (char *)&option_value,
                       option_len) < 0)
            {
                log_message(LOG_LEVEL_ERROR, "g_tcp_socket: setsockopt() failed\n");
            }
        }
    }

    return rv;
}

/*****************************************************************************/
/* returns error */
int APP_CC
g_sck_set_send_buffer_bytes(int sck, int bytes)
{
    int option_value;
#if defined(_WIN32)
    int option_len;
#else
    unsigned int option_len;
#endif

    option_value = bytes;
    option_len = sizeof(option_value);
    if (setsockopt(sck, SOL_SOCKET, SO_SNDBUF, (char *)&option_value,
                   option_len) != 0)
    {
        return 1;
    }
    return 0;
}

/*****************************************************************************/
/* returns error */
int APP_CC
g_sck_get_send_buffer_bytes(int sck, int *bytes)
{
    int option_value;
#if defined(_WIN32)
    int option_len;
#else
    unsigned int option_len;
#endif

    option_value = 0;
    option_len = sizeof(option_value);
    if (getsockopt(sck, SOL_SOCKET, SO_SNDBUF, (char *)&option_value,
                   &option_len) != 0)
    {
        return 1;
    }
    *bytes = option_value;
    return 0;
}

/*****************************************************************************/
/* returns error */
int APP_CC
g_sck_set_recv_buffer_bytes(int sck, int bytes)
{
    int option_value;
#if defined(_WIN32)
    int option_len;
#else
    unsigned int option_len;
#endif

    option_value = bytes;
    option_len = sizeof(option_value);
    if (setsockopt(sck, SOL_SOCKET, SO_RCVBUF, (char *)&option_value,
                   option_len) != 0)
    {
        return 1;
    }
    return 0;
}

/*****************************************************************************/
/* returns error */
int APP_CC
g_sck_get_recv_buffer_bytes(int sck, int *bytes)
{
    int option_value;
#if defined(_WIN32)
    int option_len;
#else
    unsigned int option_len;
#endif

    option_value = 0;
    option_len = sizeof(option_value);
    if (getsockopt(sck, SOL_SOCKET, SO_RCVBUF, (char *)&option_value,
                   &option_len) != 0)
    {
        return 1;
    }
    *bytes = option_value;
    return 0;
}

/*****************************************************************************/
int APP_CC
g_tcp_local_socket(void)
{
#if defined(_WIN32)
    return 0;
#else
    return socket(PF_LOCAL, SOCK_STREAM, 0);
#endif
}

/*****************************************************************************/
/* returns error */
int APP_CC
g_sck_get_peer_cred(int sck, int *pid, int *uid, int *gid)
{
#if defined(SO_PEERCRED)
#if defined(_WIN32)
    int ucred_length;
#else
    unsigned int ucred_length;
#endif
    struct myucred
    {
        pid_t pid;
        uid_t uid;
        gid_t gid;
    } credentials;

    ucred_length = sizeof(credentials);
    if (getsockopt(sck, SOL_SOCKET, SO_PEERCRED, &credentials, &ucred_length))
    {
        return 1;
    }
    if (pid != 0)
    {
        *pid = credentials.pid;
    }
    if (uid != 0)
    {
        *uid = credentials.uid;
    }
    if (gid != 0)
    {
        *gid = credentials.gid;
    }
    return 0;
#else
    return 1;
#endif
}

/*****************************************************************************/
void APP_CC
g_tcp_close(int sck)
{
    char ip[256];

    if (sck == 0)
    {
        return;
    }
#if defined(_WIN32)
    closesocket(sck);
#else
    g_write_ip_address(sck, ip, 255);
    log_message(LOG_LEVEL_INFO, "An established connection closed to "
                "endpoint: %s", ip);
    close(sck);
#endif
}

/*****************************************************************************/
/* returns error, zero is good */
#if defined(XRDP_ENABLE_IPV6) && !defined(NO_ARPA_INET_H_IP6)
int APP_CC
g_tcp_connect(int sck, const char *address, const char *port)
{
    int res = 0;
    struct addrinfo p;
    struct addrinfo *h = (struct addrinfo *)NULL;
    struct addrinfo *rp = (struct addrinfo *)NULL;

    /* initialize (zero out) local variables: */
    g_memset(&p, 0, sizeof(struct addrinfo));

   /* in IPv6-enabled environments, set the AI_V4MAPPED
    * flag in ai_flags and specify ai_family=AF_INET6 in
    * order to ensure that getaddrinfo() returns any
    * available IPv4-mapped addresses in case the target
    * host does not have a true IPv6 address:
    */
    p.ai_socktype = SOCK_STREAM;
    p.ai_protocol = IPPROTO_TCP;
    p.ai_flags = AI_ADDRCONFIG | AI_V4MAPPED;
    p.ai_family = AF_INET6;
    if (g_strcmp(address, "127.0.0.1") == 0)
    {
        res = getaddrinfo("::1", port, &p, &h);
    }
    else
    {
        res = getaddrinfo(address, port, &p, &h);
    }
    if (res > -1)
    {
        if (h != NULL)
        {
            for (rp = h; rp != NULL; rp = rp->ai_next)
            {
                rp = h;
                res = connect(sck, (struct sockaddr *)(rp->ai_addr),
                              rp->ai_addrlen);
                if (res != -1)
                {
                    break; /* Success */
                }
            }
        }
    }
    return res;
}
#else
int APP_CC
g_tcp_connect(int sck, const char* address, const char* port)
{
  struct sockaddr_in s;
  struct hostent* h;

  g_memset(&s, 0, sizeof(struct sockaddr_in));
  s.sin_family = AF_INET;
  s.sin_port = htons((tui16)atoi(port));
  s.sin_addr.s_addr = inet_addr(address);
  if (s.sin_addr.s_addr == INADDR_NONE)
  {
    h = gethostbyname(address);
    if (h != 0)
    {
      if (h->h_name != 0)
      {
        if (h->h_addr_list != 0)
        {
          if ((*(h->h_addr_list)) != 0)
          {
            s.sin_addr.s_addr = *((int*)(*(h->h_addr_list)));
          }
        }
      }
    }
  }
  return connect(sck, (struct sockaddr*)&s, sizeof(struct sockaddr_in));
}
#endif

/*****************************************************************************/
/* returns error, zero is good */
int APP_CC
g_tcp_local_connect(int sck, const char *port)
{
#if defined(_WIN32)
    return -1;
#else
    struct sockaddr_un s;

    memset(&s, 0, sizeof(struct sockaddr_un));
    s.sun_family = AF_UNIX;
    strncpy(s.sun_path, port, sizeof(s.sun_path));
    s.sun_path[sizeof(s.sun_path) - 1] = 0;

    return connect(sck, (struct sockaddr *)&s, sizeof(struct sockaddr_un));
#endif
}

/*****************************************************************************/
int APP_CC
g_tcp_set_non_blocking(int sck)
{
    unsigned long i;

#if defined(_WIN32)
    i = 1;
    ioctlsocket(sck, FIONBIO, &i);
#else
    i = fcntl(sck, F_GETFL);
    i = i | O_NONBLOCK;
    if (fcntl(sck, F_SETFL, i) < 0)
    {
        log_message(LOG_LEVEL_ERROR, "g_tcp_set_non_blocking: fcntl() failed\n");
    }
#endif
    return 0;
}

#if defined(XRDP_ENABLE_IPV6)
/*****************************************************************************/
/* return boolean */
static int APP_CC
address_match(const char *address, struct addrinfo *j)
{
    struct sockaddr_in *ipv4_in;
    struct sockaddr_in6 *ipv6_in;

    if (address == 0)
    {
        return 1;
    }
    if (address[0] == 0)
    {
        return 1;
    }
    if (g_strcmp(address, "0.0.0.0") == 0)
    {
        return 1;
    }
    if ((g_strcmp(address, "127.0.0.1") == 0) ||
        (g_strcmp(address, "::1") == 0) ||
        (g_strcmp(address, "localhost") == 0))
    {
        if (j->ai_addr != 0)
        {
            if (j->ai_addr->sa_family == AF_INET)
            {
                ipv4_in = (struct sockaddr_in *) (j->ai_addr);
                if (inet_pton(AF_INET, "127.0.0.1", &(ipv4_in->sin_addr)))
                {
                    return 1;
                }
            }
            if (j->ai_addr->sa_family == AF_INET6)
            {
                ipv6_in = (struct sockaddr_in6 *) (j->ai_addr);
                if (inet_pton(AF_INET6, "::1", &(ipv6_in->sin6_addr)))
                {
                    return 1;
                }
            }
        }
    }
    if (j->ai_addr != 0)
    {
        if (j->ai_addr->sa_family == AF_INET)
        {
            ipv4_in = (struct sockaddr_in *) (j->ai_addr);
            if (inet_pton(AF_INET, address, &(ipv4_in->sin_addr)))
            {
                return 1;
            }
        }
        if (j->ai_addr->sa_family == AF_INET6)
        {
            ipv6_in = (struct sockaddr_in6 *) (j->ai_addr);
            if (inet_pton(AF_INET6, address, &(ipv6_in->sin6_addr)))
            {
                return 1;
            }
        }
    }
    return 0;
}
#endif

#if defined(XRDP_ENABLE_IPV6)
/*****************************************************************************/
/* returns error, zero is good */
static int APP_CC
g_tcp_bind_flags(int sck, const char *port, const char *address, int flags)
{
    int res;
    int error;
    struct addrinfo hints;
    struct addrinfo *i;

    res = -1;
    g_memset(&hints, 0, sizeof(hints));
    hints.ai_family = AF_UNSPEC;
    hints.ai_flags = flags;
    hints.ai_socktype = SOCK_STREAM;
    hints.ai_protocol = IPPROTO_TCP;
    error = getaddrinfo(NULL, port, &hints, &i);
    if (error == 0)
    {
        while ((i != 0) && (res < 0))
        {
            if (address_match(address, i))
            {
                res = bind(sck, i->ai_addr, i->ai_addrlen);
            }
            i = i->ai_next;
        }
    }
    return res;
}

/*****************************************************************************/
/* returns error, zero is good */
int APP_CC
g_tcp_bind(int sck, const char *port)
{
    int flags;

    flags = AI_ADDRCONFIG | AI_PASSIVE;
    return g_tcp_bind_flags(sck, port, 0, flags);
}
#else
int APP_CC
g_tcp_bind(int sck, const char* port)
{
  struct sockaddr_in s;

  memset(&s, 0, sizeof(struct sockaddr_in));
  s.sin_family = AF_INET;
  s.sin_port = htons((tui16)atoi(port));
  s.sin_addr.s_addr = INADDR_ANY;
  return bind(sck, (struct sockaddr*)&s, sizeof(struct sockaddr_in));
}
#endif

/*****************************************************************************/
int APP_CC
g_tcp_local_bind(int sck, const char *port)
{
#if defined(_WIN32)
    return -1;
#else
    struct sockaddr_un s;

    memset(&s, 0, sizeof(struct sockaddr_un));
    s.sun_family = AF_UNIX;
    strncpy(s.sun_path, port, sizeof(s.sun_path));
    s.sun_path[sizeof(s.sun_path) - 1] = 0;

    return bind(sck, (struct sockaddr *)&s, sizeof(struct sockaddr_un));
#endif
}

#if defined(XRDP_ENABLE_IPV6)
/*****************************************************************************/
/* returns error, zero is good */
int APP_CC
g_tcp_bind_address(int sck, const char *port, const char *address)
{
    int flags;

    flags = AI_ADDRCONFIG | AI_PASSIVE;
    return g_tcp_bind_flags(sck, port, address, flags);
}
#else
int APP_CC
g_tcp_bind_address(int sck, const char* port, const char* address)
{
  struct sockaddr_in s;

  memset(&s, 0, sizeof(struct sockaddr_in));
  s.sin_family = AF_INET;
  s.sin_port = htons((tui16)atoi(port));
  s.sin_addr.s_addr = INADDR_ANY;
  if (inet_aton(address, &s.sin_addr) < 0)
  {
    return -1; /* bad address */
  }
  return bind(sck, (struct sockaddr*)&s, sizeof(struct sockaddr_in));
}
#endif

/*****************************************************************************/
/* returns error, zero is good */
int APP_CC
g_tcp_listen(int sck)
{
    return listen(sck, 2);
}

/*****************************************************************************/
int APP_CC
g_tcp_accept(int sck)
{
    int ret ;
    char ipAddr[256] ;
    struct sockaddr_in s;
#if defined(_WIN32)
    signed int i;
#else
    unsigned int i;
#endif

    i = sizeof(struct sockaddr_in);
    memset(&s, 0, i);
    ret = accept(sck, (struct sockaddr *)&s, &i);
    if(ret>0)
    {
        snprintf(ipAddr,255,"A connection received from: %s port %d"
        ,inet_ntoa(s.sin_addr),ntohs(s.sin_port));
        log_message(LOG_LEVEL_INFO,ipAddr);
    }
    return ret ;
}

/*****************************************************************************/
int APP_CC
g_sck_accept(int sck, char *addr, int addr_bytes, char *port, int port_bytes)
{
    int ret;
    char ipAddr[256];
    struct sockaddr_in s;
#if defined(_WIN32)
    signed int i;
#else
    unsigned int i;
#endif

    i = sizeof(struct sockaddr_in);
    memset(&s, 0, i);
    ret = accept(sck, (struct sockaddr *)&s, &i);
    if (ret > 0)
    {
        g_snprintf(ipAddr, 255, "A connection received from: %s port %d",
                   inet_ntoa(s.sin_addr), ntohs(s.sin_port));
        log_message(LOG_LEVEL_INFO,ipAddr);
        if (s.sin_family == AF_INET)
        {
            g_snprintf(addr, addr_bytes, "%s", inet_ntoa(s.sin_addr));
            g_snprintf(port, port_bytes, "%d", ntohs(s.sin_port));
        }
        if (s.sin_family == AF_UNIX)
        {
            g_strncpy(addr, "", addr_bytes - 1);
            g_strncpy(port, "", port_bytes - 1);
        }
    }
    return ret;
}

/*****************************************************************************/
void APP_CC
g_write_ip_address(int rcv_sck, char *ip_address, int bytes)
{
    struct sockaddr_in s;
    struct in_addr in;
#if defined(_WIN32)
    int len;
#else
    unsigned int len;
#endif
    int ip_port;
    int ok;

    ok = 0;
    memset(&s, 0, sizeof(s));
    len = sizeof(s);

    if (getpeername(rcv_sck, (struct sockaddr *)&s, &len) == 0)
    {
        memset(&in, 0, sizeof(in));
        in.s_addr = s.sin_addr.s_addr;
        ip_port = ntohs(s.sin_port);

        if (ip_port != 0)
        {
            ok = 1;
            snprintf(ip_address, bytes, "%s:%d - socket: %d", inet_ntoa(in),
                     ip_port, rcv_sck);
        }
    }

    if (!ok)
    {
        snprintf(ip_address, bytes, "NULL:NULL - socket: %d", rcv_sck);
    }
}

/*****************************************************************************/
void APP_CC
g_sleep(int msecs)
{
#if defined(_WIN32)
    Sleep(msecs);
#else
    usleep(msecs * 1000);
#endif
}

/*****************************************************************************/
int APP_CC
g_tcp_last_error_would_block(int sck)
{
#if defined(_WIN32)
    return WSAGetLastError() == WSAEWOULDBLOCK;
#else
    return (errno == EWOULDBLOCK) || (errno == EAGAIN) || (errno == EINPROGRESS);
#endif
}

/*****************************************************************************/
int APP_CC
g_tcp_recv(int sck, void *ptr, int len, int flags)
{
#if defined(_WIN32)
    return recv(sck, (char *)ptr, len, flags);
#else
    return recv(sck, ptr, len, flags);
#endif
}

/*****************************************************************************/
int APP_CC
g_tcp_send(int sck, const void *ptr, int len, int flags)
{
#if defined(_WIN32)
    return send(sck, (const char *)ptr, len, flags);
#else
    return send(sck, ptr, len, flags);
#endif
}

/*****************************************************************************/
/* returns boolean */
int APP_CC
g_tcp_socket_ok(int sck)
{
#if defined(_WIN32)
    int opt;
    int opt_len;
#else
    int opt;
    unsigned int opt_len;
#endif

    opt_len = sizeof(opt);

    if (getsockopt(sck, SOL_SOCKET, SO_ERROR, (char *)(&opt), &opt_len) == 0)
    {
        if (opt == 0)
        {
            return 1;
        }
    }

    return 0;
}

/*****************************************************************************/
/* wait 'millis' milliseconds for the socket to be able to write */
/* returns boolean */
int APP_CC
g_tcp_can_send(int sck, int millis)
{
    fd_set wfds;
    struct timeval time;
    int rv;

    time.tv_sec = millis / 1000;
    time.tv_usec = (millis * 1000) % 1000000;
    FD_ZERO(&wfds);

    if (sck > 0)
    {
        FD_SET(((unsigned int)sck), &wfds);
        rv = select(sck + 1, 0, &wfds, 0, &time);

        if (rv > 0)
        {
            return g_tcp_socket_ok(sck);
        }
    }

    return 0;
}

/*****************************************************************************/
/* wait 'millis' milliseconds for the socket to be able to receive */
/* returns boolean */
int APP_CC
g_tcp_can_recv(int sck, int millis)
{
    fd_set rfds;
    struct timeval time;
    int rv;

    time.tv_sec = millis / 1000;
    time.tv_usec = (millis * 1000) % 1000000;
    FD_ZERO(&rfds);

    if (sck > 0)
    {
        FD_SET(((unsigned int)sck), &rfds);
        rv = select(sck + 1, &rfds, 0, 0, &time);

        if (rv > 0)
        {
            return g_tcp_socket_ok(sck);
        }
    }

    return 0;
}

/*****************************************************************************/
int APP_CC
g_tcp_select(int sck1, int sck2)
{
    fd_set rfds;
    struct timeval time;
    int max = 0;
    int rv = 0;

    g_memset(&rfds, 0, sizeof(fd_set));
    g_memset(&time, 0, sizeof(struct timeval));

    time.tv_sec = 0;
    time.tv_usec = 0;
    FD_ZERO(&rfds);

    if (sck1 > 0)
    {
        FD_SET(((unsigned int)sck1), &rfds);
    }

    if (sck2 > 0)
    {
        FD_SET(((unsigned int)sck2), &rfds);
    }

    max = sck1;

    if (sck2 > max)
    {
        max = sck2;
    }

    rv = select(max + 1, &rfds, 0, 0, &time);

    if (rv > 0)
    {
        rv = 0;

        if (FD_ISSET(((unsigned int)sck1), &rfds))
        {
            rv = rv | 1;
        }

        if (FD_ISSET(((unsigned int)sck2), &rfds))
        {
            rv = rv | 2;
        }
    }
    else
    {
        rv = 0;
    }

    return rv;
}

/*****************************************************************************/
/* returns 0 on error */
tbus APP_CC
g_create_wait_obj(char *name)
{
#ifdef _WIN32
    tbus obj;

    obj = (tbus)CreateEvent(0, 1, 0, name);
    return obj;
#else
    tbus obj;
    struct sockaddr_un sa;
    size_t len;
    tbus sck;
    int i;
    int safety;
    int unnamed;

    if (g_temp_base[0] == 0)
    {
        return 0;
    }

    sck = socket(PF_UNIX, SOCK_DGRAM, 0);

    if (sck < 0)
    {
        return 0;
    }

    safety = 0;
    g_memset(&sa, 0, sizeof(sa));
    sa.sun_family = AF_UNIX;
    unnamed = 1;

    if (name != 0)
    {
        if (name[0] != 0)
        {
            unnamed = 0;
        }
    }

    if (unnamed)
    {
        do
        {
            if (safety > 100)
            {
                break;
            }

            safety++;
            g_random((char *)&i, sizeof(i));
            len = sizeof(sa.sun_path);
            g_snprintf(sa.sun_path, len, "%s/auto_%8.8x", g_temp_base, i);
            len = sizeof(sa);
        }
        while (bind(sck, (struct sockaddr *)&sa, len) < 0);
    }
    else
    {
        do
        {
            if (safety > 100)
            {
                break;
            }

            safety++;
            g_random((char *)&i, sizeof(i));
            len = sizeof(sa.sun_path);
            g_snprintf(sa.sun_path, len, "%s/%s_%8.8x", g_temp_base, name, i);
            len = sizeof(sa);
        }
        while (bind(sck, (struct sockaddr *)&sa, len) < 0);
    }

    obj = (tbus)sck;
    return obj;
#endif
}

/*****************************************************************************/
/* returns 0 on error */
tbus APP_CC
g_create_wait_obj_from_socket(tbus socket, int write)
{
#ifdef _WIN32
    /* Create and return corresponding event handle for WaitForMultipleObjets */
    WSAEVENT event;
    long lnetevent = 0;

    g_memset(&event, 0, sizeof(WSAEVENT));

    event = WSACreateEvent();
    lnetevent = (write ? FD_WRITE : FD_READ) | FD_CLOSE;

    if (WSAEventSelect(socket, event, lnetevent) == 0)
    {
        return (tbus)event;
    }
    else
    {
        return 0;
    }

#else
    return socket;
#endif
}

/*****************************************************************************/
void APP_CC
g_delete_wait_obj_from_socket(tbus wait_obj)
{
#ifdef _WIN32

    if (wait_obj == 0)
    {
        return;
    }

    WSACloseEvent((HANDLE)wait_obj);
#else
#endif
}

/*****************************************************************************/
/* returns error */
int APP_CC
g_set_wait_obj(tbus obj)
{
#ifdef _WIN32

    if (obj == 0)
    {
        return 0;
    }

    SetEvent((HANDLE)obj);
    return 0;
#else
    socklen_t sa_size;
    int s;
    struct sockaddr_un sa;

    if (obj == 0)
    {
        return 0;
    }

    if (g_tcp_can_recv((int)obj, 0))
    {
        /* already signalled */
        return 0;
    }

    sa_size = sizeof(sa);

    if (getsockname((int)obj, (struct sockaddr *)&sa, &sa_size) < 0)
    {
        return 1;
    }

    s = socket(PF_UNIX, SOCK_DGRAM, 0);

    if (s < 0)
    {
        return 1;
    }

    if (sendto(s, "sig", 4, 0, (struct sockaddr *)&sa, sa_size) < 0)
    {
        close(s);
        return 1;
    }

    close(s);
    return 0;
#endif
}

/*****************************************************************************/
/* returns error */
int APP_CC
g_reset_wait_obj(tbus obj)
{
#ifdef _WIN32

    if (obj == 0)
    {
        return 0;
    }

    ResetEvent((HANDLE)obj);
    return 0;
#else
    char buf[64];

    if (obj == 0)
    {
        return 0;
    }

    while (g_tcp_can_recv((int)obj, 0))
    {
        recvfrom((int)obj, &buf, 64, 0, 0, 0);
    }

    return 0;
#endif
}

/*****************************************************************************/
/* returns boolean */
int APP_CC
g_is_wait_obj_set(tbus obj)
{
#ifdef _WIN32

    if (obj == 0)
    {
        return 0;
    }

    if (WaitForSingleObject((HANDLE)obj, 0) == WAIT_OBJECT_0)
    {
        return 1;
    }

    return 0;
#else

    if (obj == 0)
    {
        return 0;
    }

    return g_tcp_can_recv((int)obj, 0);
#endif
}

/*****************************************************************************/
/* returns error */
int APP_CC
g_delete_wait_obj(tbus obj)
{
#ifdef _WIN32

    if (obj == 0)
    {
        return 0;
    }

    /* Close event handle */
    CloseHandle((HANDLE)obj);
    return 0;
#else
    socklen_t sa_size;
    struct sockaddr_un sa;

    if (obj == 0)
    {
        return 0;
    }

    sa_size = sizeof(sa);

    if (getsockname((int)obj, (struct sockaddr *)&sa, &sa_size) < 0)
    {
        return 1;
    }

    close((int)obj);
    unlink(sa.sun_path);
    return 0;
#endif
}

/*****************************************************************************/
/* returns error */
/* close but do not delete the wait obj, used after fork */
int APP_CC
g_close_wait_obj(tbus obj)
{
#ifdef _WIN32
#else
    close((int)obj);
#endif
    return 0;
}

/*****************************************************************************/
/* returns error */
int APP_CC
g_obj_wait(tbus *read_objs, int rcount, tbus *write_objs, int wcount,
           int mstimeout)
{
#ifdef _WIN32
    HANDLE handles[256];
    DWORD count;
    DWORD error;
    int j;
    int i;

    j = 0;
    count = rcount + wcount;

    for (i = 0; i < rcount; i++)
    {
        handles[j++] = (HANDLE)(read_objs[i]);
    }

    for (i = 0; i < wcount; i++)
    {
        handles[j++] = (HANDLE)(write_objs[i]);
    }

    if (mstimeout < 1)
    {
        mstimeout = INFINITE;
    }

    error = WaitForMultipleObjects(count, handles, FALSE, mstimeout);

    if (error == WAIT_FAILED)
    {
        return 1;
    }

    return 0;
#else
    fd_set rfds;
    fd_set wfds;
    struct timeval time;
    struct timeval *ptime = (struct timeval *)NULL;
    int i = 0;
    int res = 0;
    int max = 0;
    int sck = 0;

    g_memset(&rfds, 0, sizeof(fd_set));
    g_memset(&wfds, 0, sizeof(fd_set));
    g_memset(&time, 0, sizeof(struct timeval));

    max = 0;

    if (mstimeout < 1)
    {
        ptime = (struct timeval *)NULL;
    }
    else
    {
        time.tv_sec = mstimeout / 1000;
        time.tv_usec = (mstimeout % 1000) * 1000;
        ptime = &time;
    }

    FD_ZERO(&rfds);
    FD_ZERO(&wfds);

    /* Find the highest descriptor number in read_obj */
    if (read_objs != NULL)
    {
        for (i = 0; i < rcount; i++)
        {
            sck = (int)(read_objs[i]);

            if (sck > 0)
            {
                FD_SET(sck, &rfds);

                if (sck > max)
                {
                    max = sck; /* max holds the highest socket/descriptor number */
                }
            }
        }
    }
    else if (rcount > 0)
    {
        g_writeln("Programming error read_objs is null");
        return 1; /* error */
    }

    if (write_objs != NULL)
    {
        for (i = 0; i < wcount; i++)
        {
            sck = (int)(write_objs[i]);

            if (sck > 0)
            {
                FD_SET(sck, &wfds);

                if (sck > max)
                {
                    max = sck; /* max holds the highest socket/descriptor number */
                }
            }
        }
    }
    else if (wcount > 0)
    {
        g_writeln("Programming error write_objs is null");
        return 1; /* error */
    }

    res = select(max + 1, &rfds, &wfds, 0, ptime);

    if (res < 0)
    {
        /* these are not really errors */
        if ((errno == EAGAIN) ||
                (errno == EWOULDBLOCK) ||
                (errno == EINPROGRESS) ||
                (errno == EINTR)) /* signal occurred */
        {
            return 0;
        }

        return 1; /* error */
    }

    return 0;
#endif
}

/*****************************************************************************/
void APP_CC
g_random(char *data, int len)
{
#if defined(_WIN32)
    int index;

    srand(g_time1());

    for (index = 0; index < len; index++)
    {
        data[index] = (char)rand(); /* rand returns a number between 0 and
                                   RAND_MAX */
    }

#else
    int fd;

    memset(data, 0x44, len);
    fd = open("/dev/urandom", O_RDONLY);

    if (fd == -1)
    {
        fd = open("/dev/random", O_RDONLY);
    }

    if (fd != -1)
    {
        if (read(fd, data, len) != len)
        {
        }

        close(fd);
    }

#endif
}

/*****************************************************************************/
int APP_CC
g_abs(int i)
{
    return abs(i);
}

/*****************************************************************************/
int APP_CC
g_memcmp(const void *s1, const void *s2, int len)
{
    return memcmp(s1, s2, len);
}

/*****************************************************************************/
/* returns -1 on error, else return handle or file descriptor */
int APP_CC
g_file_open(const char *file_name)
{
#if defined(_WIN32)
    return (int)CreateFileA(file_name, GENERIC_READ | GENERIC_WRITE,
                            FILE_SHARE_READ | FILE_SHARE_WRITE,
                            0, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
#else
    int rv;

    rv =  open(file_name, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);

    if (rv == -1)
    {
        /* can't open read / write, try to open read only */
        rv =  open(file_name, O_RDONLY);
    }

    return rv;
#endif
}

/*****************************************************************************/
/* returns -1 on error, else return handle or file descriptor */
int APP_CC
g_file_open_ex(const char *file_name, int aread, int awrite,
               int acreate, int atrunc)
{
#if defined(_WIN32)
    return -1;
#else
    int rv;
    int flags;

    flags = 0;
    if (aread && awrite)
    {
        flags |= O_RDWR;
    }
    else if (aread)
    {
        flags |= O_RDONLY;
    }
    else if (awrite)
    {
        flags |= O_WRONLY;
    }
    if (acreate)
    {
        flags |= O_CREAT;
    }
    if (atrunc)
    {
        flags |= O_TRUNC;
    }
    rv =  open(file_name, flags, S_IRUSR | S_IWUSR);
    return rv;
#endif
}

/*****************************************************************************/
/* returns error, always 0 */
int APP_CC
g_file_close(int fd)
{
#if defined(_WIN32)
    CloseHandle((HANDLE)fd);
#else
    close(fd);
#endif
    return 0;
}

/*****************************************************************************/
/* read from file, returns the number of bytes read or -1 on error */
int APP_CC
g_file_read(int fd, char *ptr, int len)
{
#if defined(_WIN32)

    if (ReadFile((HANDLE)fd, (LPVOID)ptr, (DWORD)len, (LPDWORD)&len, 0))
    {
        return len;
    }
    else
    {
        return -1;
    }

#else
    return read(fd, ptr, len);
#endif
}

/*****************************************************************************/
/* write to file, returns the number of bytes writen or -1 on error */
int APP_CC
g_file_write(int fd, char *ptr, int len)
{
#if defined(_WIN32)

    if (WriteFile((HANDLE)fd, (LPVOID)ptr, (DWORD)len, (LPDWORD)&len, 0))
    {
        return len;
    }
    else
    {
        return -1;
    }

#else
    return write(fd, ptr, len);
#endif
}

/*****************************************************************************/
/* move file pointer, returns offset on success, -1 on failure */
int APP_CC
g_file_seek(int fd, int offset)
{
#if defined(_WIN32)
    int rv;

    rv = (int)SetFilePointer((HANDLE)fd, offset, 0, FILE_BEGIN);

    if (rv == (int)INVALID_SET_FILE_POINTER)
    {
        return -1;
    }
    else
    {
        return rv;
    }

#else
    return (int)lseek(fd, offset, SEEK_SET);
#endif
}

/*****************************************************************************/
/* do a write lock on a file */
/* return boolean */
int APP_CC
g_file_lock(int fd, int start, int len)
{
#if defined(_WIN32)
    return LockFile((HANDLE)fd, start, 0, len, 0);
#else
    struct flock lock;

    lock.l_type = F_WRLCK;
    lock.l_whence = SEEK_SET;
    lock.l_start = start;
    lock.l_len = len;

    if (fcntl(fd, F_SETLK, &lock) == -1)
    {
        return 0;
    }

    return 1;
#endif
}

/*****************************************************************************/
/* returns error */
int APP_CC
g_chmod_hex(const char *filename, int flags)
{
#if defined(_WIN32)
    return 0;
#else
    int fl;

    fl = 0;
    fl |= (flags & 0x4000) ? S_ISUID : 0;
    fl |= (flags & 0x2000) ? S_ISGID : 0;
    fl |= (flags & 0x1000) ? S_ISVTX : 0;
    fl |= (flags & 0x0400) ? S_IRUSR : 0;
    fl |= (flags & 0x0200) ? S_IWUSR : 0;
    fl |= (flags & 0x0100) ? S_IXUSR : 0;
    fl |= (flags & 0x0040) ? S_IRGRP : 0;
    fl |= (flags & 0x0020) ? S_IWGRP : 0;
    fl |= (flags & 0x0010) ? S_IXGRP : 0;
    fl |= (flags & 0x0004) ? S_IROTH : 0;
    fl |= (flags & 0x0002) ? S_IWOTH : 0;
    fl |= (flags & 0x0001) ? S_IXOTH : 0;
    return chmod(filename, fl);
#endif
}

/*****************************************************************************/
/* returns error, zero is ok */
int APP_CC
g_chown(const char *name, int uid, int gid)
{
    return chown(name, uid, gid);
}

/*****************************************************************************/
/* returns error, always zero */
int APP_CC
g_mkdir(const char *dirname)
{
#if defined(_WIN32)
    return 0;
#else
    return mkdir(dirname, S_IRWXU);
#endif
}

/*****************************************************************************/
/* gets the current working directory and puts up to maxlen chars in
   dirname
   always returns 0 */
char *APP_CC
g_get_current_dir(char *dirname, int maxlen)
{
#if defined(_WIN32)
    GetCurrentDirectoryA(maxlen, dirname);
    return 0;
#else

    if (getcwd(dirname, maxlen) == 0)
    {
    }

    return 0;
#endif
}

/*****************************************************************************/
/* returns error, zero on success and -1 on failure */
int APP_CC
g_set_current_dir(char *dirname)
{
#if defined(_WIN32)

    if (SetCurrentDirectoryA(dirname))
    {
        return 0;
    }
    else
    {
        return -1;
    }

#else
    return chdir(dirname);
#endif
}

/*****************************************************************************/
/* returns boolean, non zero if the file exists */
int APP_CC
g_file_exist(const char *filename)
{
#if defined(_WIN32)
    return 0; // use FileAge(filename) <> -1
#else
    return access(filename, F_OK) == 0;
#endif
}

/*****************************************************************************/
/* returns boolean, non zero if the directory exists */
int APP_CC
g_directory_exist(const char *dirname)
{
#if defined(_WIN32)
    return 0; // use GetFileAttributes and check return value
    // is not -1 and FILE_ATTRIBUT_DIRECTORY bit is set
#else
    struct stat st;

    if (stat(dirname, &st) == 0)
    {
        return S_ISDIR(st.st_mode);
    }
    else
    {
        return 0;
    }

#endif
}

/*****************************************************************************/
/* returns boolean */
int APP_CC
g_create_dir(const char *dirname)
{
#if defined(_WIN32)
    return CreateDirectoryA(dirname, 0); // test this
#else
    return mkdir(dirname, (mode_t) - 1) == 0;
#endif
}

/*****************************************************************************/
/* will try to create directories up to last / in name
   example /tmp/a/b/c/readme.txt will try to create /tmp/a/b/c
   returns boolean */
int APP_CC
g_create_path(const char *path)
{
    char *pp;
    char *sp;
    char *copypath;
    int status;

    status = 1;
    copypath = g_strdup(path);
    pp = copypath;
    sp = strchr(pp, '/');

    while (sp != 0)
    {
        if (sp != pp)
        {
            *sp = 0;

            if (!g_directory_exist(copypath))
            {
                if (!g_create_dir(copypath))
                {
                    status = 0;
                    break;
                }
            }

            *sp = '/';
        }

        pp = sp + 1;
        sp = strchr(pp, '/');
    }

    g_free(copypath);
    return status;
}

/*****************************************************************************/
/* returns boolean */
int APP_CC
g_remove_dir(const char *dirname)
{
#if defined(_WIN32)
    return RemoveDirectoryA(dirname); // test this
#else
    return rmdir(dirname) == 0;
#endif
}

/*****************************************************************************/
/* returns non zero if the file was deleted */
int APP_CC
g_file_delete(const char *filename)
{
#if defined(_WIN32)
    return DeleteFileA(filename);
#else
    return unlink(filename) != -1;
#endif
}

/*****************************************************************************/
/* returns file size, -1 on error */
int APP_CC
g_file_get_size(const char *filename)
{
#if defined(_WIN32)
    return -1;
#else
    struct stat st;

    if (stat(filename, &st) == 0)
    {
        return (int)(st.st_size);
    }
    else
    {
        return -1;
    }

#endif
}

/*****************************************************************************/
/* returns length of text */
int APP_CC
g_strlen(const char *text)
{
    if (text == NULL)
    {
        return 0;
    }

    return strlen(text);
}

/*****************************************************************************/
/* locates char in text */
char* APP_CC
g_strchr(const char* text, int c)
{
    if (text == NULL)
    {
        return 0;
    }

    return strchr(text,c);
}

/*****************************************************************************/
/* returns dest */
char *APP_CC
g_strcpy(char *dest, const char *src)
{
    if (src == 0 && dest != 0)
    {
        dest[0] = 0;
        return dest;
    }

    if (dest == 0 || src == 0)
    {
        return 0;
    }

    return strcpy(dest, src);
}

/*****************************************************************************/
/* returns dest */
char *APP_CC
g_strncpy(char *dest, const char *src, int len)
{
    char *rv;

    if (src == 0 && dest != 0)
    {
        dest[0] = 0;
        return dest;
    }

    if (dest == 0 || src == 0)
    {
        return 0;
    }

    rv = strncpy(dest, src, len);
    dest[len] = 0;
    return rv;
}

/*****************************************************************************/
/* returns dest */
char *APP_CC
g_strcat(char *dest, const char *src)
{
    if (dest == 0 || src == 0)
    {
        return dest;
    }

    return strcat(dest, src);
}

/*****************************************************************************/
/* if in = 0, return 0 else return newly alloced copy of in */
char *APP_CC
g_strdup(const char *in)
{
    int len;
    char *p;

    if (in == 0)
    {
        return 0;
    }

    len = g_strlen(in);
    p = (char *)g_malloc(len + 1, 0);

    if (p != NULL)
    {
        g_strcpy(p, in);
    }

    return p;
}
/*****************************************************************************/
/* if in = 0, return 0 else return newly alloced copy of input string
 * if the input string is larger than maxlen the returned string will be
 * truncated. All strings returned will include null termination*/
char *APP_CC
g_strndup(const char *in, const unsigned int maxlen)
{
    int len;
    char *p;

    if (in == 0)
    {
        return 0;
    }

    len = g_strlen(in);

    if (len > maxlen)
    {
        len = maxlen - 1;
    }

    p = (char *)g_malloc(len + 2, 0);

    if (p != NULL)
    {
        g_strncpy(p, in, len + 1);
    }

    return p;
}
/*****************************************************************************/
int APP_CC
g_strcmp(const char *c1, const char *c2)
{
    return strcmp(c1, c2);
}

/*****************************************************************************/
int APP_CC
g_strncmp(const char *c1, const char *c2, int len)
{
    return strncmp(c1, c2, len);
}

/*****************************************************************************/
/* compare up to delim */
int APP_CC
g_strncmp_d(const char *s1, const char *s2, const char delim, int n)
{
    char c1;
    char c2;

    while (n > 0)
    {
        c1 = *s1++;
        c2 = *s2++;
        if ((c1 == 0) || (c1 != c2) || (c1 == delim) || (c2 == delim))
        {
            return c1 - c2;
        }
        n--;
    }
    return c1 - c2;
}

/*****************************************************************************/
int APP_CC
g_strcasecmp(const char *c1, const char *c2)
{
#if defined(_WIN32)
    return stricmp(c1, c2);
#else
    return strcasecmp(c1, c2);
#endif
}

/*****************************************************************************/
int APP_CC
g_strncasecmp(const char *c1, const char *c2, int len)
{
#if defined(_WIN32)
    return strnicmp(c1, c2, len);
#else
    return strncasecmp(c1, c2, len);
#endif
}

/*****************************************************************************/
int APP_CC
g_atoi(const char *str)
{
    if (str == 0)
    {
        return 0;
    }

    return atoi(str);
}

/*****************************************************************************/
int APP_CC
g_htoi(char *str)
{
    int len;
    int index;
    int rv;
    int val;
    int shift;

    rv = 0;
    len = strlen(str);
    index = len - 1;
    shift = 0;

    while (index >= 0)
    {
        val = 0;

        switch (str[index])
        {
            case '1':
                val = 1;
                break;
            case '2':
                val = 2;
                break;
            case '3':
                val = 3;
                break;
            case '4':
                val = 4;
                break;
            case '5':
                val = 5;
                break;
            case '6':
                val = 6;
                break;
            case '7':
                val = 7;
                break;
            case '8':
                val = 8;
                break;
            case '9':
                val = 9;
                break;
            case 'a':
            case 'A':
                val = 10;
                break;
            case 'b':
            case 'B':
                val = 11;
                break;
            case 'c':
            case 'C':
                val = 12;
                break;
            case 'd':
            case 'D':
                val = 13;
                break;
            case 'e':
            case 'E':
                val = 14;
                break;
            case 'f':
            case 'F':
                val = 15;
                break;
        }

        rv = rv | (val << shift);
        index--;
        shift += 4;
    }

    return rv;
}

/*****************************************************************************/
int APP_CC
g_pos(const char *str, const char *to_find)
{
    char *pp;

    pp = strstr(str, to_find);

    if (pp == 0)
    {
        return -1;
    }

    return (pp - str);
}

/*****************************************************************************/
int APP_CC
g_mbstowcs(twchar *dest, const char *src, int n)
{
    wchar_t *ldest;
    int rv;

    ldest = (wchar_t *)dest;
    rv = mbstowcs(ldest, src, n);
    return rv;
}

/*****************************************************************************/
int APP_CC
g_wcstombs(char *dest, const twchar *src, int n)
{
    const wchar_t *lsrc;
    int rv;

    lsrc = (const wchar_t *)src;
    rv = wcstombs(dest, lsrc, n);
    return rv;
}

/*****************************************************************************/
/* returns error */
/* trim spaces and tabs, anything <= space */
/* trim_flags 1 trim left, 2 trim right, 3 trim both, 4 trim through */
/* this will always shorten the string or not change it */
int APP_CC
g_strtrim(char *str, int trim_flags)
{
    int index;
    int len;
    int text1_index;
    int got_char;
    wchar_t *text;
    wchar_t *text1;

    len = mbstowcs(0, str, 0);

    if (len < 1)
    {
        return 0;
    }

    if ((trim_flags < 1) || (trim_flags > 4))
    {
        return 1;
    }

    text = (wchar_t *)malloc(len * sizeof(wchar_t) + 8);
    text1 = (wchar_t *)malloc(len * sizeof(wchar_t) + 8);
    text1_index = 0;
    mbstowcs(text, str, len + 1);

    switch (trim_flags)
    {
        case 4: /* trim through */

            for (index = 0; index < len; index++)
            {
                if (text[index] > 32)
                {
                    text1[text1_index] = text[index];
                    text1_index++;
                }
            }

            text1[text1_index] = 0;
            break;
        case 3: /* trim both */
            got_char = 0;

            for (index = 0; index < len; index++)
            {
                if (got_char)
                {
                    text1[text1_index] = text[index];
                    text1_index++;
                }
                else
                {
                    if (text[index] > 32)
                    {
                        text1[text1_index] = text[index];
                        text1_index++;
                        got_char = 1;
                    }
                }
            }

            text1[text1_index] = 0;
            len = text1_index;

            /* trim right */
            for (index = len - 1; index >= 0; index--)
            {
                if (text1[index] > 32)
                {
                    break;
                }
            }

            text1_index = index + 1;
            text1[text1_index] = 0;
            break;
        case 2: /* trim right */

            /* copy it */
            for (index = 0; index < len; index++)
            {
                text1[text1_index] = text[index];
                text1_index++;
            }

            /* trim right */
            for (index = len - 1; index >= 0; index--)
            {
                if (text1[index] > 32)
                {
                    break;
                }
            }

            text1_index = index + 1;
            text1[text1_index] = 0;
            break;
        case 1: /* trim left */
            got_char = 0;

            for (index = 0; index < len; index++)
            {
                if (got_char)
                {
                    text1[text1_index] = text[index];
                    text1_index++;
                }
                else
                {
                    if (text[index] > 32)
                    {
                        text1[text1_index] = text[index];
                        text1_index++;
                        got_char = 1;
                    }
                }
            }

            text1[text1_index] = 0;
            break;
    }

    wcstombs(str, text1, text1_index + 1);
    free(text);
    free(text1);
    return 0;
}

/*****************************************************************************/
long APP_CC
g_load_library(char *in)
{
#if defined(_WIN32)
    return (long)LoadLibraryA(in);
#else
    return (long)dlopen(in, RTLD_LOCAL | RTLD_LAZY);
#endif
}

/*****************************************************************************/
int APP_CC
g_free_library(long lib)
{
    if (lib == 0)
    {
        return 0;
    }

#if defined(_WIN32)
    return FreeLibrary((HMODULE)lib);
#else
    return dlclose((void *)lib);
#endif
}

/*****************************************************************************/
/* returns NULL if not found */
void *APP_CC
g_get_proc_address(long lib, const char *name)
{
    if (lib == 0)
    {
        return 0;
    }

#if defined(_WIN32)
    return GetProcAddress((HMODULE)lib, name);
#else
    return dlsym((void *)lib, name);
#endif
}

/*****************************************************************************/
/* does not work in win32 */
int APP_CC
g_system(char *aexec)
{
#if defined(_WIN32)
    return 0;
#else
    return system(aexec);
#endif
}

/*****************************************************************************/
/* does not work in win32 */
char *APP_CC
g_get_strerror(void)
{
#if defined(_WIN32)
    return 0;
#else
    return strerror(errno);
#endif
}

/*****************************************************************************/
int APP_CC
g_get_errno(void)
{
#if defined(_WIN32)
    return GetLastError();
#else
    return errno;
#endif
}

/*****************************************************************************/
/* does not work in win32 */
int APP_CC
g_execvp(const char *p1, char *args[])
{
#if defined(_WIN32)
    return 0;
#else
    int rv;

    g_rm_temp_dir();
    rv = execvp(p1, args);
    g_mk_temp_dir(0);
    return rv;
#endif
}

/*****************************************************************************/
/* does not work in win32 */
int APP_CC
g_execlp3(const char *a1, const char *a2, const char *a3)
{
#if defined(_WIN32)
    return 0;
#else
    int rv;

    g_rm_temp_dir();
    rv = execlp(a1, a2, a3, (void *)0);
    g_mk_temp_dir(0);
    return rv;
#endif
}

/*****************************************************************************/
/* does not work in win32 */
void APP_CC
g_signal_child_stop(void (*func)(int))
{
#if defined(_WIN32)
#else
    signal(SIGCHLD, func);
#endif
}

/*****************************************************************************/

void APP_CC
g_signal_segfault(void (*func)(int))
{
#if defined(_WIN32)
#else
    signal(SIGSEGV, func);
#endif
}

/*****************************************************************************/
/* does not work in win32 */
void APP_CC
g_signal_hang_up(void (*func)(int))
{
#if defined(_WIN32)
#else
    signal(SIGHUP, func);
#endif
}

/*****************************************************************************/
/* does not work in win32 */
void APP_CC
g_signal_user_interrupt(void (*func)(int))
{
#if defined(_WIN32)
#else
    signal(SIGINT, func);
#endif
}

/*****************************************************************************/
/* does not work in win32 */
void APP_CC
g_signal_kill(void (*func)(int))
{
#if defined(_WIN32)
#else
    signal(SIGKILL, func);
#endif
}

/*****************************************************************************/
/* does not work in win32 */
void APP_CC
g_signal_terminate(void (*func)(int))
{
#if defined(_WIN32)
#else
    signal(SIGTERM, func);
#endif
}

/*****************************************************************************/
/* does not work in win32 */
void APP_CC
g_signal_pipe(void (*func)(int))
{
#if defined(_WIN32)
#else
    signal(SIGPIPE, func);
#endif
}

/*****************************************************************************/
/* does not work in win32 */
void APP_CC
g_signal_usr1(void (*func)(int))
{
#if defined(_WIN32)
#else
    signal(SIGUSR1, func);
#endif
}

/*****************************************************************************/
/* does not work in win32 */
int APP_CC
g_fork(void)
{
#if defined(_WIN32)
    return 0;
#else
    int rv;

    rv = fork();

    if (rv == 0) /* child */
    {
        g_mk_temp_dir(0);
    }

    return rv;
#endif
}

/*****************************************************************************/
/* does not work in win32 */
int APP_CC
g_setgid(int pid)
{
#if defined(_WIN32)
    return 0;
#else
    return setgid(pid);
#endif
}

/*****************************************************************************/
/* returns error, zero is success, non zero is error */
/* does not work in win32 */
int APP_CC
g_initgroups(const char *user, int gid)
{
#if defined(_WIN32)
    return 0;
#else
    return initgroups(user, gid);
#endif
}

/*****************************************************************************/
/* does not work in win32 */
/* returns user id */
int APP_CC
g_getuid(void)
{
#if defined(_WIN32)
    return 0;
#else
    return getuid();
#endif
}

/*****************************************************************************/
/* does not work in win32 */
/* returns user id */
int APP_CC
g_getgid(void)
{
#if defined(_WIN32)
    return 0;
#else
    return getgid();
#endif
}

/*****************************************************************************/
/* does not work in win32 */
/* On success, zero is returned. On error, -1 is returned */
int APP_CC
g_setuid(int pid)
{
#if defined(_WIN32)
    return 0;
#else
    return setuid(pid);
#endif
}

/*****************************************************************************/
/* does not work in win32
   returns pid of process that exits or zero if signal occurred */
int APP_CC
g_waitchild(void)
{
#if defined(_WIN32)
    return 0;
#else
    int wstat;
    int rv;

    rv = waitpid(0, &wstat, WNOHANG);

    if (rv == -1)
    {
        if (errno == EINTR) /* signal occurred */
        {
            rv = 0;
        }
    }

    return rv;
#endif
}

/*****************************************************************************/
/* does not work in win32
   returns pid of process that exits or zero if signal occurred */
int APP_CC
g_waitpid(int pid)
{
#if defined(_WIN32)
    return 0;
#else
    int rv = 0;

    if (pid < 0)
    {
        rv = -1;
    }
    else
    {
        rv = waitpid(pid, 0, 0);

        if (rv == -1)
        {
            if (errno == EINTR) /* signal occurred */
            {
                rv = 0;
            }
        }
    }

    return rv;
#endif
}

/*****************************************************************************/
/* does not work in win32 */
void APP_CC
g_clearenv(void)
{
#if defined(_WIN32)
#else
#if defined(BSD)
    environ[0] = 0;
#else
    environ = 0;
#endif
#endif
}

/*****************************************************************************/
/* does not work in win32 */
int APP_CC
g_setenv(const char *name, const char *value, int rewrite)
{
#if defined(_WIN32)
    return 0;
#else
    return setenv(name, value, rewrite);
#endif
}

/*****************************************************************************/
/* does not work in win32 */
char *APP_CC
g_getenv(const char *name)
{
#if defined(_WIN32)
    return 0;
#else
    return getenv(name);
#endif
}

/*****************************************************************************/
int APP_CC
g_exit(int exit_code)
{
    _exit(exit_code);
    return 0;
}

/*****************************************************************************/
int APP_CC
g_getpid(void)
{
#if defined(_WIN32)
    return (int)GetCurrentProcessId();
#else
    return (int)getpid();
#endif
}

/*****************************************************************************/
/* does not work in win32 */
int APP_CC
g_sigterm(int pid)
{
#if defined(_WIN32)
    return 0;
#else
    return kill(pid, SIGTERM);
#endif
}

/*****************************************************************************/
/* returns 0 if ok */
/* does not work in win32 */
int APP_CC
g_getuser_info(const char *username, int *gid, int *uid, char *shell,
               char *dir, char *gecos)
{
#if defined(_WIN32)
    return 1;
#else
    struct passwd *pwd_1;

    pwd_1 = getpwnam(username);

    if (pwd_1 != 0)
    {
        if (gid != 0)
        {
            *gid = pwd_1->pw_gid;
        }

        if (uid != 0)
        {
            *uid = pwd_1->pw_uid;
        }

        if (dir != 0)
        {
            g_strcpy(dir, pwd_1->pw_dir);
        }

        if (shell != 0)
        {
            g_strcpy(shell, pwd_1->pw_shell);
        }

        if (gecos != 0)
        {
            g_strcpy(gecos, pwd_1->pw_gecos);
        }

        return 0;
    }

    return 1;
#endif
}

/*****************************************************************************/
/* returns 0 if ok */
/* does not work in win32 */
int APP_CC
g_getgroup_info(const char *groupname, int *gid)
{
#if defined(_WIN32)
    return 1;
#else
    struct group *g;

    g = getgrnam(groupname);

    if (g != 0)
    {
        if (gid != 0)
        {
            *gid = g->gr_gid;
        }

        return 0;
    }

    return 1;
#endif
}

/*****************************************************************************/
/* returns error */
/* if zero is returned, then ok is set */
/* does not work in win32 */
int APP_CC
g_check_user_in_group(const char *username, int gid, int *ok)
{
#if defined(_WIN32)
    return 1;
#else
    struct group *groups;
    int i;

    groups = getgrgid(gid);

    if (groups == 0)
    {
        return 1;
    }

    *ok = 0;
    i = 0;

    while (0 != groups->gr_mem[i])
    {
        if (0 == g_strcmp(groups->gr_mem[i], username))
        {
            *ok = 1;
            break;
        }

        i++;
    }

    return 0;
#endif
}

/*****************************************************************************/
/* returns the time since the Epoch (00:00:00 UTC, January 1, 1970),
   measured in seconds.
   for windows, returns the number of seconds since the machine was
   started. */
int APP_CC
g_time1(void)
{
#if defined(_WIN32)
    return GetTickCount() / 1000;
#else
    return time(0);
#endif
}

/*****************************************************************************/
/* returns the number of milliseconds since the machine was
   started. */
int APP_CC
g_time2(void)
{
#if defined(_WIN32)
    return (int)GetTickCount();
#else
    struct tms tm;
    clock_t num_ticks = 0;
    g_memset(&tm, 0, sizeof(struct tms));
    num_ticks = times(&tm);
    return (int)(num_ticks * 10);
#endif
}

/*****************************************************************************/
/* returns time in milliseconds, uses gettimeofday
   does not work in win32 */
int APP_CC
g_time3(void)
{
#if defined(_WIN32)
    return 0;
#else
    struct timeval tp;

    gettimeofday(&tp, 0);
    return (tp.tv_sec * 1000) + (tp.tv_usec / 1000);
#endif
}

/******************************************************************************/
/******************************************************************************/
struct bmp_magic
{
    char magic[2];
};

struct bmp_hdr
{
    unsigned int   size;        /* file size in bytes */
    unsigned short reserved1;
    unsigned short reserved2;
    unsigned int   offset;      /* offset to image data, in bytes */
};

struct dib_hdr
{
    unsigned int   hdr_size;
    int            width;
    int            height;
    unsigned short nplanes;
    unsigned short bpp;
    unsigned int   compress_type;
    unsigned int   image_size;
    int            hres;
    int            vres;
    unsigned int   ncolors;
    unsigned int   nimpcolors;
    };

/******************************************************************************/
int APP_CC
g_save_to_bmp(const char* filename, char* data, int stride_bytes,
              int width, int height, int depth, int bits_per_pixel)
{
    struct bmp_magic bm;
    struct bmp_hdr bh;
    struct dib_hdr dh;
    int bytes;
    int fd;
    int index;
    int i1;
    int pixel;
    int extra;
    int file_stride_bytes;
    char* line;
    char* line_ptr;
    
    if ((depth == 24) && (bits_per_pixel == 32))
    {
    }
    else if ((depth == 32) && (bits_per_pixel == 32))
    {
    }
    else
    {
        g_writeln("g_save_to_bpp: unimp");
        return 1;
    }
    bm.magic[0] = 'B';
    bm.magic[1] = 'M';

    /* scan lines are 32 bit aligned, bottom 2 bits must be zero */
    file_stride_bytes = width * ((depth + 7) / 8);
    extra = file_stride_bytes;
    extra = extra & 3;
    extra = (4 - extra) & 3;
    file_stride_bytes += extra;

    bh.size = sizeof(bm) + sizeof(bh) + sizeof(dh) + height * file_stride_bytes;
    bh.reserved1 = 0;
    bh.reserved2 = 0;
    bh.offset = sizeof(bm) + sizeof(bh) + sizeof(dh);
    
    dh.hdr_size = sizeof(dh);
    dh.width = width;
    dh.height = height;
    dh.nplanes = 1;
    dh.bpp = depth;
    dh.compress_type = 0;
    dh.image_size = height * file_stride_bytes;
    dh.hres = 0xb13;
    dh.vres = 0xb13;
    dh.ncolors = 0;
    dh.nimpcolors = 0;

    fd = open(filename, O_RDWR | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
    if (fd == -1)
    {
        g_writeln("g_save_to_bpp: open error");
        return 1;
    }
    bytes = write(fd, &bm, sizeof(bm));
    if (bytes != sizeof(bm))
    {
        g_writeln("g_save_to_bpp: write error");
    }
    bytes = write(fd, &bh, sizeof(bh));
    if (bytes != sizeof(bh))
    {
        g_writeln("g_save_to_bpp: write error");
    }
    bytes = write(fd, &dh, sizeof(dh));
    if (bytes != sizeof(dh))
    {
        g_writeln("g_save_to_bpp: write error");
    }
    data += stride_bytes * height;
    data -= stride_bytes;
    if ((depth == 24) && (bits_per_pixel == 32))
    {
        line = malloc(file_stride_bytes);
        memset(line, 0, file_stride_bytes);
        for (index = 0; index < height; index++)
        {
            line_ptr = line;
            for (i1 = 0; i1 < width; i1++)
            {
                pixel = ((int*)data)[i1];
                *(line_ptr++) = (pixel >>  0) & 0xff;
                *(line_ptr++) = (pixel >>  8) & 0xff;
                *(line_ptr++) = (pixel >> 16) & 0xff;
            }
            bytes = write(fd, line, file_stride_bytes);
            if (bytes != file_stride_bytes)
            {
                g_writeln("g_save_to_bpp: write error");
            }
            data -= stride_bytes;
        }
        free(line);
    }
    else if (depth == bits_per_pixel)
    {
        for (index = 0; index < height; index++)
        {
            bytes = write(fd, data, width * (bits_per_pixel / 8));
            if (bytes != width * (bits_per_pixel / 8))
            {
                g_writeln("g_save_to_bpp: write error");
            }
            data -= stride_bytes;
        }
    }
    else
    {
        g_writeln("g_save_to_bpp: unimp");
    }
    close(fd);
    return 0;
}

/*****************************************************************************/
/* returns boolean */
int APP_CC
g_text2bool(const char *s)
{
    if ( (g_atoi(s) != 0) ||
         (0 == g_strcasecmp(s, "true")) ||
         (0 == g_strcasecmp(s, "on")) ||
         (0 == g_strcasecmp(s, "yes")))
    {
        return 1;
    }
    return 0;
}

/*****************************************************************************/
/* returns pointer or nil on error */
void * APP_CC
g_shmat(int shmid)
{
#if defined(_WIN32)
    return 0;
#else
     return shmat(shmid, 0, 0);
#endif
}

/*****************************************************************************/
/* returns -1 on error 0 on success */
int APP_CC
g_shmdt(const void *shmaddr)
{
#if defined(_WIN32)
    return -1;
#else
    return shmdt(shmaddr);
#endif
}

/*****************************************************************************/
/* returns -1 on error 0 on success */
int APP_CC
g_gethostname(char *name, int len)
{
    return gethostname(name, len);
}