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378 lines
12 KiB
378 lines
12 KiB
/*
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This file is part of the KDE libraries
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Copyright (c) 2003 Oswald Buddenhagen <ossi@kde.org>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include <kshell.h>
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#include <qfile.h>
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#include <stdlib.h>
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#include <pwd.h>
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#include <sys/types.h>
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static int fromHex( QChar c )
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{
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if (c >= '0' && c <= '9')
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return c - '0';
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else if (c >= 'A' && c <= 'F')
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return c - 'A' + 10;
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else if (c >= 'a' && c <= 'f')
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return c - 'a' + 10;
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return -1;
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}
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inline static bool isQuoteMeta( uint c )
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{
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#if 0 // it's not worth it, especially after seeing gcc's asm output ...
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static const uchar iqm[] = {
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0x00, 0x00, 0x00, 0x00, 0x94, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00
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}; // \'"$
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return (c < sizeof(iqm) * 8) && (iqm[c / 8] & (1 << (c & 7)));
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#else
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return c == '\\' || c == '\'' || c == '"' || c == '$';
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#endif
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}
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inline static bool isMeta( uint c )
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{
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static const uchar iqm[] = {
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0x00, 0x00, 0x00, 0x00, 0xdc, 0x07, 0x00, 0xd8,
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0x00, 0x00, 0x00, 0x10, 0x01, 0x00, 0x00, 0x38
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}; // \'"$`<>|;&(){}*?#
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return (c < sizeof(iqm) * 8) && (iqm[c / 8] & (1 << (c & 7)));
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}
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QStringList KShell::splitArgs( const QString &args, int flags, int *err )
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{
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QStringList ret;
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bool firstword = flags & AbortOnMeta;
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for (uint pos = 0; ; ) {
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QChar c;
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do {
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if (pos >= args.length())
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goto okret;
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c = args.unicode()[pos++];
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} while (c.isSpace());
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QString cret;
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if ((flags & TildeExpand) && c == '~') {
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uint opos = pos;
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for (; ; pos++) {
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if (pos >= args.length())
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break;
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c = args.unicode()[pos];
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if (c == '/' || c.isSpace())
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break;
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if (isQuoteMeta( c )) {
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pos = opos;
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c = '~';
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goto notilde;
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}
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if ((flags & AbortOnMeta) && isMeta( c ))
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goto metaerr;
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}
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QString ccret = homeDir( QConstString( args.unicode() + opos, pos - opos ).string() );
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if (ccret.isEmpty()) {
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pos = opos;
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c = '~';
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goto notilde;
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}
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if (pos >= args.length()) {
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ret += ccret;
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goto okret;
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}
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pos++;
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if (c.isSpace()) {
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ret += ccret;
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firstword = false;
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continue;
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}
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cret = ccret;
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}
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// before the notilde label, as a tilde does not match anyway
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if (firstword) {
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if (c == '_' || (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z')) {
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uint pos2 = pos;
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QChar cc;
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do
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cc = args[pos2++];
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while (cc == '_' || (cc >= 'A' && cc <= 'Z') ||
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(cc >= 'a' && cc <= 'z') || (cc >= '0' && cc <= '9'));
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if (cc == '=')
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goto metaerr;
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}
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}
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notilde:
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do {
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if (c == '\'') {
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uint spos = pos;
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do {
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if (pos >= args.length())
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goto quoteerr;
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c = args.unicode()[pos++];
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} while (c != '\'');
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cret += QConstString( args.unicode() + spos, pos - spos - 1 ).string();
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} else if (c == '"') {
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for (;;) {
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if (pos >= args.length())
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goto quoteerr;
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c = args.unicode()[pos++];
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if (c == '"')
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break;
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if (c == '\\') {
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if (pos >= args.length())
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goto quoteerr;
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c = args.unicode()[pos++];
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if (c != '"' && c != '\\' &&
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!((flags & AbortOnMeta) && (c == '$' || c == '`')))
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cret += '\\';
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} else if ((flags & AbortOnMeta) && (c == '$' || c == '`'))
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goto metaerr;
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cret += c;
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}
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} else if (c == '$' && args[pos] == '\'') {
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pos++;
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for (;;) {
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if (pos >= args.length())
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goto quoteerr;
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c = args.unicode()[pos++];
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if (c == '\'')
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break;
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if (c == '\\') {
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if (pos >= args.length())
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goto quoteerr;
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c = args.unicode()[pos++];
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switch (c) {
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case 'a': cret += '\a'; break;
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case 'b': cret += '\b'; break;
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case 'e': cret += '\033'; break;
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case 'f': cret += '\f'; break;
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case 'n': cret += '\n'; break;
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case 'r': cret += '\r'; break;
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case 't': cret += '\t'; break;
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case '\\': cret += '\\'; break;
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case '\'': cret += '\''; break;
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case 'c': cret += args[pos++] & 31; break;
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case 'x':
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{
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int hv = fromHex( args[pos] );
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if (hv < 0) {
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cret += "\\x";
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} else {
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int hhv = fromHex( args[++pos] );
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if (hhv > 0) {
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hv = hv * 16 + hhv;
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pos++;
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}
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cret += QChar( hv );
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}
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break;
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}
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default:
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if (c >= '0' && c <= '7') {
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int hv = c - '0';
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for (int i = 0; i < 2; i++) {
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c = args[pos];
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if (c < '0' || c > '7')
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break;
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hv = hv * 8 + (c - '0');
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pos++;
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}
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cret += QChar( hv );
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} else {
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cret += '\\';
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cret += c;
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}
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break;
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}
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} else
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cret += c;
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}
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} else {
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if (c == '\\') {
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if (pos >= args.length())
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goto quoteerr;
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c = args.unicode()[pos++];
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if (!c.isSpace() &&
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!((flags & AbortOnMeta) ? isMeta( c ) : isQuoteMeta( c )))
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cret += '\\';
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} else if ((flags & AbortOnMeta) && isMeta( c ))
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goto metaerr;
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cret += c;
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}
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if (pos >= args.length())
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break;
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c = args.unicode()[pos++];
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} while (!c.isSpace());
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ret += cret;
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firstword = false;
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}
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okret:
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if (err)
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*err = NoError;
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return ret;
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quoteerr:
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if (err)
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*err = BadQuoting;
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return QStringList();
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metaerr:
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if (err)
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*err = FoundMeta;
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return QStringList();
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}
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inline static bool isSpecial( uint c )
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{
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static const uchar iqm[] = {
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0xff, 0xff, 0xff, 0xff, 0xdd, 0x07, 0x00, 0xd8,
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0x00, 0x00, 0x00, 0x10, 0x01, 0x00, 0x00, 0x38
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}; // 0-32 \'"$`<>|;&(){}*?#
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return (c < sizeof(iqm) * 8) && (iqm[c / 8] & (1 << (c & 7)));
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}
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QString KShell::joinArgs( const QStringList &args )
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{
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QChar q( '\'' );
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QString ret;
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for (QStringList::ConstIterator it = args.begin(); it != args.end(); ++it) {
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if (!ret.isEmpty())
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ret += ' ';
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if (!(*it).length())
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ret.append( q ).append( q );
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else {
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for (uint i = 0; i < (*it).length(); i++)
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if (isSpecial((*it).unicode()[i])) {
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QString tmp(*it);
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tmp.replace( q, "'\\''" );
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ret += q;
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tmp += q;
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ret += tmp;
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goto ex;
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}
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ret += *it;
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ex: ;
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}
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}
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return ret;
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}
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QString KShell::joinArgs( const char * const *args, int nargs )
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{
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if (!args)
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return QString::null; // well, QString::empty, in fact. qt sucks ;)
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QChar q( '\'' );
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QString ret;
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for (const char * const *argp = args; nargs && *argp; argp++, nargs--) {
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if (!ret.isEmpty())
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ret += ' ';
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if (!**argp)
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ret.append( q ).append( q );
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else {
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QString tmp( QFile::decodeName( *argp ) );
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for (uint i = 0; i < tmp.length(); i++)
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if (isSpecial(tmp.unicode()[i])) {
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tmp.replace( q, "'\\''" );
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ret += q;
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tmp += q;
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ret += tmp;
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goto ex;
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}
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ret += tmp;
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ex: ;
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}
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}
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return ret;
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}
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QString KShell::joinArgsDQ( const QStringList &args )
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{
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QChar q( '\'' ), sp( ' ' ), bs( '\\' );
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QString ret;
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for (QStringList::ConstIterator it = args.begin(); it != args.end(); ++it) {
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if (!ret.isEmpty())
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ret += sp;
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if (!(*it).length())
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ret.append( q ).append( q );
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else {
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for (uint i = 0; i < (*it).length(); i++)
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if (isSpecial((*it).unicode()[i])) {
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ret.append( '$' ).append( q );
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for (uint pos = 0; pos < (*it).length(); pos++) {
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int c = (*it).unicode()[pos];
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if (c < 32) {
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ret += bs;
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switch (c) {
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case '\a': ret += 'a'; break;
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case '\b': ret += 'b'; break;
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case '\033': ret += 'e'; break;
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case '\f': ret += 'f'; break;
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case '\n': ret += 'n'; break;
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case '\r': ret += 'r'; break;
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case '\t': ret += 't'; break;
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case '\034': ret += 'c'; ret += '|'; break;
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default: ret += 'c'; ret += c + '@'; break;
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}
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} else {
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if (c == '\'' || c == '\\')
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ret += bs;
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ret += c;
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}
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}
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ret.append( q );
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goto ex;
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}
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ret += *it;
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ex: ;
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}
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}
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return ret;
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}
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QString KShell::tildeExpand( const QString &fname )
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{
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if (fname[0] == '~') {
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int pos = fname.find( '/' );
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if (pos < 0)
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return homeDir( QConstString( fname.unicode() + 1, fname.length() - 1 ).string() );
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QString ret = homeDir( QConstString( fname.unicode() + 1, pos - 1 ).string() );
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if (!ret.isNull())
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ret += QConstString( fname.unicode() + pos, fname.length() - pos ).string();
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return ret;
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}
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return fname;
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}
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QString KShell::homeDir( const QString &user )
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{
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if (user.isEmpty())
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return QFile::decodeName( getenv( "HOME" ) );
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struct passwd *pw = getpwnam( QFile::encodeName( user ).data() );
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if (!pw)
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return QString::null;
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return QFile::decodeName( pw->pw_dir );
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}
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