/* * Mini chown/chmod/chgrp implementation for busybox * * Copyright (C) 1998 by Erik Andersen * * 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 #include #include #include "internal.h" static int uid=-1; static int gid=0; 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"; 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) < 0) return( TRUE); case CHMOD_APP: fprintf(stderr, "%s, %d\n", fileName, mode); if (chmod(fileName, mode)) return( TRUE); } perror(fileName); return( FALSE); } int chmod_chown_chgrp_main(int argc, char **argv) { struct group *grp; struct passwd *pwd; 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); } //mode &= andWithMode; fprintf(stderr, "mode %d\n", mode); } else { /* Find the selected group */ groupName = strchr(*argv, '.'); if ( whichApp==TRUE && groupName ) *groupName++ = '\0'; else groupName = *argv; grp = getgrnam(groupName); if (grp == NULL) { fprintf(stderr, "%s: Unknown group name: %s\n", invocationName, groupName); exit( FALSE); } gid = grp->gr_gid; /* Find the selected user (if appropriate) */ if (whichApp==TRUE) { pwd = getpwnam(*argv); if (pwd == NULL) { fprintf(stderr, "%s: Unknown user name: %s\n", invocationName, *argv); exit( FALSE); } uid = pwd->pw_uid; } } /* 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); } #ifdef fooo #include "internal.h" #include #include #include #include int my_getid(const char *filename, const char *name, uid_t *id) { FILE *stream; uid_t rid; char *rname, *start, *end, buf[128]; 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)) { *id=rid; return 0; } } else { if ( *id == rid ) return 0; } } fclose(stream); return -1; } int my_getpwuid(uid_t *uid) { return my_getid("/etc/passwd", NULL, uid); } int my_getpwnam(char *name, uid_t *uid) { return my_getid("/etc/passwd", name, uid); } int my_getgrgid(gid_t *gid) { return my_getid("/etc/group", NULL, gid); } int my_getgrnam(char *name, gid_t *gid) { return my_getid("/etc/group", name, gid); } const char chown_usage[] = "chown [-R] user-name file [file ...]\n" "\n\tThe group list is kept in the file /etc/groups.\n\n" "\t-R:\tRecursively change the mode of all files and directories\n" "\t\tunder the argument directory."; int parse_user_name(const char * s, struct FileInfo * i) { char * dot = strchr(s, '.'); char * end = NULL; uid_t id = 0; if (! dot ) dot = strchr(s, ':'); if ( dot ) *dot = '\0'; if ( my_getpwnam(s,&id) == -1 ) { id = strtol(s,&end,10); if ((*end != '\0') || ( my_getpwuid(&id) == -1 )) { fprintf(stderr, "%s: no such user.\n", s); return 1; } } i->userID = id; if ( dot ) { if ( my_getgrnam(++dot,&id) == -1 ) { id = strtol(dot,&end,10); if ((*end != '\0') || ( my_getgrgid(&id) == -1 )) { fprintf(stderr, "%s: no such group.\n", dot); return 1; } } i->groupID = id; i->changeGroupID = 1; } return 0; } extern int chown_main(struct FileInfo * i, int argc, char * * argv) { int status; while ( argc >= 3 && strcmp("-R", argv[1]) == 0 ) { i->recursive = 1; argc--; argv++; } if ( (status = parse_user_name(argv[1], i)) != 0 ) return status; argv++; argc--; i->changeUserID = 1; i->complainInPostProcess = 1; return monadic_main(i, argc, argv); } #endif