exec-cd.c (2206B)
1 // $Id$ --*- c -*-- 2 3 // Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de> 4 // 5 // This program is free software; you can redistribute it and/or modify 6 // it under the terms of the GNU General Public License as published by 7 // the Free Software Foundation; version 2 of the License. 8 // 9 // This program is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU General Public License for more details. 13 // 14 // You should have received a copy of the GNU General Public License 15 // along with this program; if not, write to the Free Software 16 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17 18 19 #ifdef HAVE_CONFIG_H 20 # include <config.h> 21 #endif 22 23 #include "util.h" 24 #include <fcntl.h> 25 #include <errno.h> 26 27 #define ENSC_WRAPPERS_PREFIX "exec-cd: " 28 #define ENSC_WRAPPERS_FCNTL 1 29 #define ENSC_WRAPPERS_UNISTD 1 30 #include <wrappers.h> 31 32 int wrapper_exit_code = 255; 33 34 static void 35 showHelp(int fd, char const *cmd, int res) 36 { 37 WRITE_MSG(fd, "Usage: "); 38 WRITE_STR(fd, cmd); 39 WRITE_MSG(fd, 40 " [--] <dir> <cmd> <args>*\n\n" 41 "Please report bugs to " PACKAGE_BUGREPORT "\n"); 42 exit(res); 43 } 44 45 static void 46 showVersion() 47 { 48 WRITE_MSG(1, 49 "exec-cd " VERSION " -- executes commands within a safely changed cwd\n" 50 "This program is part of " PACKAGE_STRING "\n\n" 51 "Copyright (C) 2003 Enrico Scholz\n" 52 VERSION_COPYRIGHT_DISCLAIMER); 53 exit(0); 54 } 55 56 int main(int argc, char *argv[]) 57 { 58 int dirfd_root = Eopen("/", O_RDONLY, 0); 59 int idx = 1; 60 int dirfd_cur; 61 62 if (argc>=2) { 63 if (strcmp(argv[1], "--help") ==0) showHelp(1, argv[0], 0); 64 if (strcmp(argv[1], "--version")==0) showVersion(); 65 if (strcmp(argv[1], "--") ==0) ++idx; 66 } 67 68 if (argc<idx+2) { 69 WRITE_MSG(2, "Not enough parameters; use '--help' for more information\n"); 70 return wrapper_exit_code; 71 } 72 73 74 Echroot("."); 75 Echdir(argv[idx]); 76 77 dirfd_cur = Eopen(".", O_RDONLY, 0); 78 79 Efchdir(dirfd_root); 80 Echroot("."); 81 82 Efchdir(dirfd_cur); 83 84 Eclose(dirfd_cur); 85 Eclose(dirfd_root); 86 87 Eexecv(argv[idx+1], argv+idx+1); 88 }