| /* |
| * Mini chown/chmod/chgrp implementation for busybox |
| * |
| * Copyright (C) 1998 by Erik Andersen <andersee@debian.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program 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 |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| */ |
| |
| #include <stdio.h> |
| #include <grp.h> |
| #include <pwd.h> |
| #include "internal.h" |
| |
| |
| static uid_t uid=-1; |
| static gid_t gid=-1; |
| static int whichApp; |
| static char* invocationName=NULL; |
| static mode_t mode=0644; |
| |
| |
| #define CHGRP_APP 1 |
| #define CHOWN_APP 2 |
| #define CHMOD_APP 3 |
| |
| static const char chgrp_usage[] = "[OPTION]... GROUP FILE...\n" |
| "Change the group membership of each FILE to GROUP.\n" |
| "\n\tOptions:\n" "\t-R\tchange files and directories recursively\n"; |
| static const char chown_usage[] = "[OPTION]... OWNER[.[GROUP] FILE...\n" |
| "Change the owner and/or group of each FILE to OWNER and/or GROUP.\n" |
| "\n\tOptions:\n" "\t-R\tchange files and directories recursively\n"; |
| static const char chmod_usage[] = "[-R] MODE[,MODE]... FILE...\n" |
| "Each MODE is one or more of the letters ugoa, one of the symbols +-= and\n" |
| "one or more of the letters rwxst.\n\n" |
| "\t-R\tchange files and directories recursively.\n"; |
| |
| |
| uid_t my_getid(const char *filename, const char *name) |
| { |
| FILE *stream; |
| char *rname, *start, *end, buf[128]; |
| uid_t rid; |
| |
| stream=fopen(filename,"r"); |
| |
| while (fgets (buf, 128, stream) != NULL) { |
| if (buf[0] == '#') |
| continue; |
| |
| start = buf; |
| end = strchr (start, ':'); |
| if (end == NULL) |
| continue; |
| *end = '\0'; |
| rname = start; |
| |
| start = end + 1; |
| end = strchr (start, ':'); |
| if (end == NULL) |
| continue; |
| |
| start = end + 1; |
| rid = (uid_t) strtol (start, &end, 10); |
| if (end == start) |
| continue; |
| |
| if (name) { |
| if (0 == strcmp(rname, name)) |
| return( rid); |
| } |
| } |
| fclose(stream); |
| return (-1); |
| } |
| |
| uid_t |
| my_getpwnam(char *name) |
| { |
| return my_getid("/etc/passwd", name); |
| } |
| |
| gid_t |
| my_getgrnam(char *name) |
| { |
| return my_getid("/etc/group", name); |
| } |
| |
| static int fileAction(const char *fileName, struct stat* statbuf) |
| { |
| switch (whichApp) { |
| case CHGRP_APP: |
| case CHOWN_APP: |
| if (chown(fileName, (whichApp==CHOWN_APP)? uid : statbuf->st_uid, |
| (gid==-1)? statbuf->st_gid : gid) == 0) { |
| return( TRUE); |
| } |
| break; |
| case CHMOD_APP: |
| if (chmod(fileName, mode) == 0) |
| return( TRUE); |
| break; |
| } |
| perror(fileName); |
| return( FALSE); |
| } |
| |
| int chmod_chown_chgrp_main(int argc, char **argv) |
| { |
| int recursiveFlag=FALSE; |
| char *groupName; |
| |
| whichApp = (strcmp(*argv, "chown")==0)? CHOWN_APP : (strcmp(*argv, "chmod")==0)? CHMOD_APP : CHGRP_APP; |
| |
| if (argc < 2) { |
| fprintf(stderr, "Usage: %s %s", *argv, |
| (whichApp==TRUE)? chown_usage : chgrp_usage); |
| exit( FALSE); |
| } |
| invocationName=*argv; |
| argc--; |
| argv++; |
| |
| /* Parse options */ |
| while (**argv == '-') { |
| while (*++(*argv)) switch (**argv) { |
| case 'R': |
| recursiveFlag = TRUE; |
| break; |
| default: |
| fprintf(stderr, "Unknown option: %c\n", **argv); |
| exit( FALSE); |
| } |
| argc--; |
| argv++; |
| } |
| |
| if ( whichApp == CHMOD_APP ) { |
| /* Find the specified modes */ |
| mode &= S_ISVTX|S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO; |
| if ( parse_mode(*argv, &mode) == FALSE ) { |
| fprintf(stderr, "%s: Unknown mode: %s\n", invocationName, *argv); |
| exit( FALSE); |
| } |
| } else { |
| |
| /* Find the selected group */ |
| if ( whichApp==CHGRP_APP && groupName ) { |
| groupName = *argv; |
| gid = my_getgrnam(groupName); |
| if (gid == -1) |
| goto bad_group; |
| } else { |
| groupName = strchr(*argv, '.'); |
| if (groupName) { |
| *groupName++ = '\0'; |
| gid = my_getgrnam(groupName); |
| if (gid == -1) |
| goto bad_group; |
| } else |
| gid = -1; |
| } |
| |
| |
| /* Find the selected user (if appropriate) */ |
| if (whichApp==CHOWN_APP) { |
| uid = my_getpwnam(*argv); |
| if (uid == -1) { |
| fprintf(stderr, "%s: Unknown user name: %s\n", invocationName, *argv); |
| exit( FALSE); |
| } |
| } |
| } |
| |
| /* Ok, ready to do the deed now */ |
| if (argc <= 1) { |
| fprintf(stderr, "%s: too few arguments", invocationName); |
| exit( FALSE); |
| } |
| while (argc-- > 1) { |
| if (recursiveAction( *(++argv), recursiveFlag, TRUE, FALSE, fileAction, fileAction)==FALSE) |
| exit( FALSE); |
| } |
| exit(TRUE); |
| |
| bad_group: |
| fprintf(stderr, "%s: Unknown group name: %s\n", invocationName, groupName); |
| exit( FALSE); |
| } |
| |
| |