diff options
Diffstat (limited to 'chown.c')
| -rw-r--r-- | chown.c | 191 |
1 files changed, 160 insertions, 31 deletions
@@ -1,5 +1,5 @@ /* - * Mini chown/chgrp implementation for busybox + * Mini chown/chmod/chgrp implementation for busybox * * Copyright (C) 1998 by Erik Andersen <andersee@debian.org> * @@ -27,33 +27,150 @@ static int uid=-1; static int gid=0; -static int chownApp; +static int whichApp; static char* invocationName=NULL; +static mode_t mode=7777; +#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; - if ((stat(fileName, &statBuf) < 0) || - (chown(fileName, - ((chownApp==TRUE)? uid: statBuf.st_uid), - gid) < 0)) { - perror(fileName); - return( FALSE); + if (stat(fileName, &statBuf) < 0) { + 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: + if (chmod(fileName, mode)) + return( TRUE); + } } - return( TRUE); + perror(fileName); + return( FALSE); } -int chown_main(int argc, char **argv) +/* [ugoa]{+|-|=}[rwxstl] */ +int parse_mode( const char* s, mode_t* or, mode_t* and, int* group_execute) +{ + mode_t mode = 0; + mode_t groups = S_ISVTX; + char type; + char c; + + do { + for ( ; ; ) { + switch ( c = *s++ ) { + case '\0': + return (FALSE); + case 'u': + groups |= S_ISUID|S_IRWXU; + continue; + case 'g': + groups |= S_ISGID|S_IRWXG; + continue; + case 'o': + groups |= S_IRWXO; + continue; + case 'a': + groups |= S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO; + continue; + case '+': + case '=': + case '-': + type = c; + if ( groups == S_ISVTX ) /* The default is "all" */ + groups |= S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO; + break; + default: + if ( c >= '0' && c <= '7' && mode == 0 && groups == S_ISVTX ) { + *and = 0; + *or = strtol(--s, 0, 010); + return (TRUE); + } + else + return (FALSE); + } + break; + } + + while ( (c = *s++) != '\0' ) { + switch ( c ) { + case ',': + break; + case 'r': + mode |= S_IRUSR|S_IRGRP|S_IROTH; + continue; + case 'w': + mode |= S_IWUSR|S_IWGRP|S_IWOTH; + continue; + case 'x': + mode |= S_IXUSR|S_IXGRP|S_IXOTH; + continue; + case 's': + if ( group_execute != 0 && (groups & S_IRWXG) ) { + if ( *group_execute < 0 ) + return (FALSE); + if ( type != '-' ) { + mode |= S_IXGRP; + *group_execute = 1; + } + } + mode |= S_ISUID|S_ISGID; + continue; + case 'l': + if ( *group_execute > 0 ) + return (FALSE); + if ( type != '-' ) { + *and &= ~S_IXGRP; + *group_execute = -1; + } + mode |= S_ISGID; + groups |= S_ISGID; + continue; + case 't': + mode |= S_ISVTX; + continue; + default: + return (FALSE); + } + break; + } + switch ( type ) { + case '=': + *and &= ~(groups); + /* fall through */ + case '+': + *or |= mode & groups; + break; + case '-': + *and &= ~(mode & groups); + *or &= *and; + break; + } + } while ( c == ',' ); + return (TRUE); +} + + +int chmod_chown_chgrp_main(int argc, char **argv) { struct group *grp; struct passwd *pwd; @@ -61,11 +178,11 @@ int chown_main(int argc, char **argv) char *groupName; - chownApp = (strcmp(*argv, "chown")==0)? TRUE : FALSE; + whichApp = (strcmp(*argv, "chown")==0)? CHOWN_APP : (strcmp(*argv, "chmod")==0)? CHMOD_APP : CHGRP_APP; if (argc < 2) { fprintf(stderr, "Usage: %s %s", *argv, - (chownApp==TRUE)? chown_usage : chgrp_usage); + (whichApp==TRUE)? chown_usage : chgrp_usage); exit( FALSE); } invocationName=*argv; @@ -86,29 +203,40 @@ int chown_main(int argc, char **argv) argv++; } - /* Find the selected group */ - groupName = strchr(*argv, '.'); - if ( chownApp==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; + if ( whichApp == CHMOD_APP ) { + /* Find the specified modes */ + if ( parse_mode(*argv, &orWithMode, &andWithMode, 0) == FALSE ) { + fprintf(stderr, "%s: Unknown mode: %s\n", invocationName, *argv); + exit( FALSE); + } + mode &= andWithMode; + mode |= orWithMode; + } else { - /* Find the selected user (if appropriate) */ - if (chownApp==TRUE) { - pwd = getpwnam(*argv); - if (pwd == NULL) { - fprintf(stderr, "%s: Unknown user name: %s\n", invocationName, *argv); + /* 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); } - uid = pwd->pw_uid; - } + 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); @@ -120,3 +248,4 @@ int chown_main(int argc, char **argv) } exit(TRUE); } + |