162 lines
4.3 KiB
C
162 lines
4.3 KiB
C
/*
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* Mini chown/chmod/chgrp implementation for busybox
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*
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*
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* Copyright (C) 1999 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <stdio.h>
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#include <grp.h>
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#include <pwd.h>
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#include "internal.h"
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static uid_t uid=-1;
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static gid_t gid=-1;
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static int whichApp;
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static char* invocationName=NULL;
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static char* theMode=NULL;
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#define CHGRP_APP 1
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#define CHOWN_APP 2
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#define CHMOD_APP 3
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static const char chgrp_usage[] = "chgrp [OPTION]... GROUP FILE...\n\n"
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"Change the group membership of each FILE to GROUP.\n"
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"\nOptions:\n\t-R\tchange files and directories recursively\n";
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static const char chown_usage[] = "chown [OPTION]... OWNER[.[GROUP] FILE...\n\n"
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"Change the owner and/or group of each FILE to OWNER and/or GROUP.\n"
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"\nOptions:\n\t-R\tchange files and directories recursively\n";
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static const char chmod_usage[] = "chmod [-R] MODE[,MODE]... FILE...\n\n"
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"Each MODE is one or more of the letters ugoa, one of the symbols +-= and\n"
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"one or more of the letters rwxst.\n\n"
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"\nOptions:\n\t-R\tchange files and directories recursively.\n";
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static int fileAction(const char *fileName, struct stat* statbuf)
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{
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switch (whichApp) {
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case CHGRP_APP:
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case CHOWN_APP:
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#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
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if (lchown(fileName, (whichApp==CHOWN_APP)? uid : statbuf->st_uid,
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(gid==-1)? statbuf->st_gid : gid) == 0)
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#else
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if (chown(fileName, (whichApp==CHOWN_APP)? uid : statbuf->st_uid,
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(gid==-1)? statbuf->st_gid : gid) == 0)
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#endif
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{
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return( TRUE);
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}
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break;
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case CHMOD_APP:
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/* Parse the specified modes */
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if ( parse_mode(theMode, &(statbuf->st_mode)) == FALSE ) {
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fprintf(stderr, "%s: Unknown mode: %s\n", invocationName, theMode);
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exit( FALSE);
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}
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if (chmod(fileName, statbuf->st_mode) == 0)
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return( TRUE);
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break;
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}
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perror(fileName);
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return( FALSE);
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}
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int chmod_chown_chgrp_main(int argc, char **argv)
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{
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int recursiveFlag=FALSE;
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char *groupName;
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const char *appUsage;
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whichApp = (strcmp(*argv, "chown")==0)? CHOWN_APP : (strcmp(*argv, "chmod")==0)? CHMOD_APP : CHGRP_APP;
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appUsage = (whichApp==CHOWN_APP)? chown_usage : (whichApp==CHMOD_APP)? chmod_usage : chgrp_usage;
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if (argc < 2)
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usage( appUsage);
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invocationName=*argv;
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argc--;
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argv++;
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/* Parse options */
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while (**argv == '-') {
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while (*++(*argv)) switch (**argv) {
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case 'R':
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recursiveFlag = TRUE;
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break;
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default:
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fprintf(stderr, "Unknown option: %c\n", **argv);
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usage( appUsage);
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}
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argc--;
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argv++;
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}
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if ( whichApp == CHMOD_APP ) {
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theMode=*argv;
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} else {
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/* Find the selected group */
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if ( whichApp==CHGRP_APP ) {
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groupName = *argv;
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gid = my_getgrnam(groupName);
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if (gid == -1)
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goto bad_group;
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} else {
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groupName = strchr(*argv, '.');
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if (groupName) {
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*groupName++ = '\0';
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gid = my_getgrnam(groupName);
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if (gid == -1)
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goto bad_group;
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} else
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gid = -1;
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}
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/* Find the selected user (if appropriate) */
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if (whichApp==CHOWN_APP) {
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uid = my_getpwnam(*argv);
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if (uid == -1) {
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fprintf(stderr, "%s: Unknown user name: %s\n", invocationName, *argv);
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exit( FALSE);
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}
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}
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}
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/* Ok, ready to do the deed now */
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if (argc <= 1) {
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fprintf(stderr, "%s: too few arguments", invocationName);
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exit( FALSE);
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}
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while (argc-- > 1) {
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if (recursiveAction( *(++argv), recursiveFlag, TRUE, FALSE, fileAction, fileAction)==FALSE)
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exit( FALSE);
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}
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exit(TRUE);
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bad_group:
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fprintf(stderr, "%s: Unknown group name: %s\n", invocationName, groupName);
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exit( FALSE);
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}
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