diff options
Diffstat (limited to 'kdecore/kshell.cpp')
| -rw-r--r-- | kdecore/kshell.cpp | 377 |
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 ); +} |