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-rw-r--r--kdecore/kshell.cpp377
1 files changed, 377 insertions, 0 deletions
diff --git a/kdecore/kshell.cpp b/kdecore/kshell.cpp
new file mode 100644
index 000000000..2d688a85f
--- /dev/null
+++ b/kdecore/kshell.cpp
@@ -0,0 +1,377 @@
+/*
+ This file is part of the KDE libraries
+
+ Copyright (c) 2003 Oswald Buddenhagen <ossi@kde.org>
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public
+ License as published by the Free Software Foundation; either
+ version 2 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public License
+ along with this library; see the file COPYING.LIB. If not, write to
+ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+*/
+
+#include <kshell.h>
+
+#include <qfile.h>
+
+#include <stdlib.h>
+#include <pwd.h>
+#include <sys/types.h>
+
+static int fromHex( QChar c )
+{
+ if (c >= '0' && c <= '9')
+ return c - '0';
+ else if (c >= 'A' && c <= 'F')
+ return c - 'A' + 10;
+ else if (c >= 'a' && c <= 'f')
+ return c - 'a' + 10;
+ return -1;
+}
+
+inline static bool isQuoteMeta( uint c )
+{
+#if 0 // it's not worth it, especially after seeing gcc's asm output ...
+ static const uchar iqm[] = {
+ 0x00, 0x00, 0x00, 0x00, 0x94, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00
+ }; // \'"$
+
+ return (c < sizeof(iqm) * 8) && (iqm[c / 8] & (1 << (c & 7)));
+#else
+ return c == '\\' || c == '\'' || c == '"' || c == '$';
+#endif
+}
+
+inline static bool isMeta( uint c )
+{
+ static const uchar iqm[] = {
+ 0x00, 0x00, 0x00, 0x00, 0xdc, 0x07, 0x00, 0xd8,
+ 0x00, 0x00, 0x00, 0x10, 0x01, 0x00, 0x00, 0x38
+ }; // \'"$`<>|;&(){}*?#
+
+ return (c < sizeof(iqm) * 8) && (iqm[c / 8] & (1 << (c & 7)));
+}
+
+QStringList KShell::splitArgs( const QString &args, int flags, int *err )
+{
+ QStringList ret;
+ bool firstword = flags & AbortOnMeta;
+
+ for (uint pos = 0; ; ) {
+ QChar c;
+ do {
+ if (pos >= args.length())
+ goto okret;
+ c = args.unicode()[pos++];
+ } while (c.isSpace());
+ QString cret;
+ if ((flags & TildeExpand) && c == '~') {
+ uint opos = pos;
+ for (; ; pos++) {
+ if (pos >= args.length())
+ break;
+ c = args.unicode()[pos];
+ if (c == '/' || c.isSpace())
+ break;
+ if (isQuoteMeta( c )) {
+ pos = opos;
+ c = '~';
+ goto notilde;
+ }
+ if ((flags & AbortOnMeta) && isMeta( c ))
+ goto metaerr;
+ }
+ QString ccret = homeDir( QConstString( args.unicode() + opos, pos - opos ).string() );
+ if (ccret.isEmpty()) {
+ pos = opos;
+ c = '~';
+ goto notilde;
+ }
+ if (pos >= args.length()) {
+ ret += ccret;
+ goto okret;
+ }
+ pos++;
+ if (c.isSpace()) {
+ ret += ccret;
+ firstword = false;
+ continue;
+ }
+ cret = ccret;
+ }
+ // before the notilde label, as a tilde does not match anyway
+ if (firstword) {
+ if (c == '_' || (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z')) {
+ uint pos2 = pos;
+ QChar cc;
+ do
+ cc = args[pos2++];
+ while (cc == '_' || (cc >= 'A' && cc <= 'Z') ||
+ (cc >= 'a' && cc <= 'z') || (cc >= '0' && cc <= '9'));
+ if (cc == '=')
+ goto metaerr;
+ }
+ }
+ notilde:
+ do {
+ if (c == '\'') {
+ uint spos = pos;
+ do {
+ if (pos >= args.length())
+ goto quoteerr;
+ c = args.unicode()[pos++];
+ } while (c != '\'');
+ cret += QConstString( args.unicode() + spos, pos - spos - 1 ).string();
+ } else if (c == '"') {
+ for (;;) {
+ if (pos >= args.length())
+ goto quoteerr;
+ c = args.unicode()[pos++];
+ if (c == '"')
+ break;
+ if (c == '\\') {
+ if (pos >= args.length())
+ goto quoteerr;
+ c = args.unicode()[pos++];
+ if (c != '"' && c != '\\' &&
+ !((flags & AbortOnMeta) && (c == '$' || c == '`')))
+ cret += '\\';
+ } else if ((flags & AbortOnMeta) && (c == '$' || c == '`'))
+ goto metaerr;
+ cret += c;
+ }
+ } else if (c == '$' && args[pos] == '\'') {
+ pos++;
+ for (;;) {
+ if (pos >= args.length())
+ goto quoteerr;
+ c = args.unicode()[pos++];
+ if (c == '\'')
+ break;
+ if (c == '\\') {
+ if (pos >= args.length())
+ goto quoteerr;
+ c = args.unicode()[pos++];
+ switch (c) {
+ case 'a': cret += '\a'; break;
+ case 'b': cret += '\b'; break;
+ case 'e': cret += '\033'; break;
+ case 'f': cret += '\f'; break;
+ case 'n': cret += '\n'; break;
+ case 'r': cret += '\r'; break;
+ case 't': cret += '\t'; break;
+ case '\\': cret += '\\'; break;
+ case '\'': cret += '\''; break;
+ case 'c': cret += args[pos++] & 31; break;
+ case 'x':
+ {
+ int hv = fromHex( args[pos] );
+ if (hv < 0) {
+ cret += "\\x";
+ } else {
+ int hhv = fromHex( args[++pos] );
+ if (hhv > 0) {
+ hv = hv * 16 + hhv;
+ pos++;
+ }
+ cret += QChar( hv );
+ }
+ break;
+ }
+ default:
+ if (c >= '0' && c <= '7') {
+ int hv = c - '0';
+ for (int i = 0; i < 2; i++) {
+ c = args[pos];
+ if (c < '0' || c > '7')
+ break;
+ hv = hv * 8 + (c - '0');
+ pos++;
+ }
+ cret += QChar( hv );
+ } else {
+ cret += '\\';
+ cret += c;
+ }
+ break;
+ }
+ } else
+ cret += c;
+ }
+ } else {
+ if (c == '\\') {
+ if (pos >= args.length())
+ goto quoteerr;
+ c = args.unicode()[pos++];
+ if (!c.isSpace() &&
+ !((flags & AbortOnMeta) ? isMeta( c ) : isQuoteMeta( c )))
+ cret += '\\';
+ } else if ((flags & AbortOnMeta) && isMeta( c ))
+ goto metaerr;
+ cret += c;
+ }
+ if (pos >= args.length())
+ break;
+ c = args.unicode()[pos++];
+ } while (!c.isSpace());
+ ret += cret;
+ firstword = false;
+ }
+
+ okret:
+ if (err)
+ *err = NoError;
+ return ret;
+
+ quoteerr:
+ if (err)
+ *err = BadQuoting;
+ return QStringList();
+
+ metaerr:
+ if (err)
+ *err = FoundMeta;
+ return QStringList();
+}
+
+inline static bool isSpecial( uint c )
+{
+ static const uchar iqm[] = {
+ 0xff, 0xff, 0xff, 0xff, 0xdd, 0x07, 0x00, 0xd8,
+ 0x00, 0x00, 0x00, 0x10, 0x01, 0x00, 0x00, 0x38
+ }; // 0-32 \'"$`<>|;&(){}*?#
+
+ return (c < sizeof(iqm) * 8) && (iqm[c / 8] & (1 << (c & 7)));
+}
+
+QString KShell::joinArgs( const QStringList &args )
+{
+ QChar q( '\'' );
+ QString ret;
+ for (QStringList::ConstIterator it = args.begin(); it != args.end(); ++it) {
+ if (!ret.isEmpty())
+ ret += ' ';
+ if (!(*it).length())
+ ret.append( q ).append( q );
+ else {
+ for (uint i = 0; i < (*it).length(); i++)
+ if (isSpecial((*it).unicode()[i])) {
+ QString tmp(*it);
+ tmp.replace( q, "'\\''" );
+ ret += q;
+ tmp += q;
+ ret += tmp;
+ goto ex;
+ }
+ ret += *it;
+ ex: ;
+ }
+ }
+ return ret;
+}
+
+QString KShell::joinArgs( const char * const *args, int nargs )
+{
+ if (!args)
+ return QString::null; // well, QString::empty, in fact. qt sucks ;)
+ QChar q( '\'' );
+ QString ret;
+ for (const char * const *argp = args; nargs && *argp; argp++, nargs--) {
+ if (!ret.isEmpty())
+ ret += ' ';
+ if (!**argp)
+ ret.append( q ).append( q );
+ else {
+ QString tmp( QFile::decodeName( *argp ) );
+ for (uint i = 0; i < tmp.length(); i++)
+ if (isSpecial(tmp.unicode()[i])) {
+ tmp.replace( q, "'\\''" );
+ ret += q;
+ tmp += q;
+ ret += tmp;
+ goto ex;
+ }
+ ret += tmp;
+ ex: ;
+ }
+ }
+ return ret;
+}
+
+QString KShell::joinArgsDQ( const QStringList &args )
+{
+ QChar q( '\'' ), sp( ' ' ), bs( '\\' );
+ QString ret;
+ for (QStringList::ConstIterator it = args.begin(); it != args.end(); ++it) {
+ if (!ret.isEmpty())
+ ret += sp;
+ if (!(*it).length())
+ ret.append( q ).append( q );
+ else {
+ for (uint i = 0; i < (*it).length(); i++)
+ if (isSpecial((*it).unicode()[i])) {
+ ret.append( '$' ).append( q );
+ for (uint pos = 0; pos < (*it).length(); pos++) {
+ int c = (*it).unicode()[pos];
+ if (c < 32) {
+ ret += bs;
+ switch (c) {
+ case '\a': ret += 'a'; break;
+ case '\b': ret += 'b'; break;
+ case '\033': ret += 'e'; break;
+ case '\f': ret += 'f'; break;
+ case '\n': ret += 'n'; break;
+ case '\r': ret += 'r'; break;
+ case '\t': ret += 't'; break;
+ case '\034': ret += 'c'; ret += '|'; break;
+ default: ret += 'c'; ret += c + '@'; break;
+ }
+ } else {
+ if (c == '\'' || c == '\\')
+ ret += bs;
+ ret += c;
+ }
+ }
+ ret.append( q );
+ goto ex;
+ }
+ ret += *it;
+ ex: ;
+ }
+ }
+ return ret;
+}
+
+QString KShell::tildeExpand( const QString &fname )
+{
+ if (fname[0] == '~') {
+ int pos = fname.find( '/' );
+ if (pos < 0)
+ return homeDir( QConstString( fname.unicode() + 1, fname.length() - 1 ).string() );
+ QString ret = homeDir( QConstString( fname.unicode() + 1, pos - 1 ).string() );
+ if (!ret.isNull())
+ ret += QConstString( fname.unicode() + pos, fname.length() - pos ).string();
+ return ret;
+ }
+ return fname;
+}
+
+QString KShell::homeDir( const QString &user )
+{
+ if (user.isEmpty())
+ return QFile::decodeName( getenv( "HOME" ) );
+ struct passwd *pw = getpwnam( QFile::encodeName( user ).data() );
+ if (!pw)
+ return QString::null;
+ return QFile::decodeName( pw->pw_dir );
+}