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137 lines
2.2 KiB
137 lines
2.2 KiB
#include <stdio.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <errno.h>
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void commandFromPid(int pid, char *name)
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{
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char buf[256], c;
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FILE *f;
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int i;
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name[0] = 0;
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snprintf(buf, 256, "/proc/%d/stat", pid);
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f = fopen(buf, "r");
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if (f == NULL)
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return;
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while ((c = fgetc(f)) != '(') ;
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i = 0;
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while ((c = fgetc(f)) != ')')
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name[i++] = c;
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name[i] = 0;
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}
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int findPid(const char *progname)
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{
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char name[256];
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DIR *dir;
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int pid = -1;
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struct dirent *ds;
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dir = opendir("/proc");
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if (dir == NULL)
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return -1;
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while ((ds = readdir(dir)) !=NULL )
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{
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pid = -1;
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pid = atoi(ds->d_name);
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if (pid != -1)
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{
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commandFromPid(pid, name);
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if (strcmp(progname, name) == 0)
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return pid;
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}
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}
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return -1;
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}
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void usage()
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{
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printf("usage: signal_proc [ -s signal_number ] [ -l ] -p <progname>\n");
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}
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int main(int argc, char **argv)
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{
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int pid = -1;
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char progname[128] = {0};
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int signal_number = -1, i, list_only = 0;
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for (i = 1; i < argc; i++)
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{
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if (argv[i][0] != '-')
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{
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usage();
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return(-1);
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}
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switch (argv[i][1])
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{
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case 'p':
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strncpy(progname, argv[++i], 128);
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progname[127]='\0';
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break;
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case 's':
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signal_number = atoi(argv[++i]);
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break;
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case 'l':
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list_only = 1;
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break;
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default:
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usage();
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return -1;
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}
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}
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if (progname[0] == 0)
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{
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usage();
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return -1;
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}
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pid = findPid(progname);
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if (pid == -1)
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{
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fprintf(stderr, "no such program: %s\n", progname);
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return -1;
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}
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if (list_only)
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{
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fprintf(stdout, "PID: %d\n", pid);
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return 0;
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}
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if (signal_number != -1)
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{
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int result;
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result = kill(pid, signal_number);
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if (result == -1)
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{
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if (errno == EPERM)
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{
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char buf[256];
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fprintf(stderr, "operation not authorized, switching to root\n");
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snprintf(buf, 256, "kill -%d %d", signal_number, pid);
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if (execlp("tdesu", "tdesu", "-c", buf, (void *)0) == -1)
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{
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fprintf(stderr, "operation failed: %s\n", strerror(errno));
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return -1;
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}
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}
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else
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{
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fprintf(stderr, "operation failed (invalid signal or no such process)\n");
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return -1;
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}
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}
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}
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else
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{
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fprintf(stderr, "only signal sending is currently supported\n");
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return -1;
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}
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return 0;
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}
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