| /* vi: set sw=4 ts=4: */ |
| /* |
| * Mini chown implementation for busybox |
| * |
| * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
| */ |
| |
| /* BB_AUDIT SUSv3 defects - unsupported options -H, -L, and -P. */ |
| /* BB_AUDIT GNU defects - unsupported long options. */ |
| /* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */ |
| |
| #include "busybox.h" |
| |
| static uid_t uid = -1; |
| static gid_t gid = -1; |
| |
| static int (*chown_func)(const char *, uid_t, gid_t) = chown; |
| |
| #define OPT_RECURSE (option_mask32 & 1) |
| #define OPT_NODEREF (option_mask32 & 2) |
| #define OPT_VERBOSE (USE_DESKTOP(option_mask32 & 4) SKIP_DESKTOP(0)) |
| #define OPT_CHANGED (USE_DESKTOP(option_mask32 & 8) SKIP_DESKTOP(0)) |
| #define OPT_QUIET (USE_DESKTOP(option_mask32 & 0x10) SKIP_DESKTOP(0)) |
| #define OPT_STR ("Rh" USE_DESKTOP("vcf")) |
| |
| /* TODO: |
| * -H if a command line argument is a symbolic link to a directory, traverse it |
| * -L traverse every symbolic link to a directory encountered |
| * -P do not traverse any symbolic links (default) |
| */ |
| |
| static int fileAction(const char *fileName, struct stat *statbuf, |
| void ATTRIBUTE_UNUSED *junk, int depth) |
| { |
| // TODO: -H/-L/-P |
| // if (depth ... && S_ISLNK(statbuf->st_mode)) .... |
| |
| if (!chown_func(fileName, |
| (uid == (uid_t)-1) ? statbuf->st_uid : uid, |
| (gid == (gid_t)-1) ? statbuf->st_gid : gid)) { |
| if (OPT_VERBOSE |
| || (OPT_CHANGED && (statbuf->st_uid != uid || statbuf->st_gid != gid)) |
| ) { |
| printf("changed ownership of '%s' to %u:%u\n", fileName, uid, gid); |
| } |
| return TRUE; |
| } |
| if (!OPT_QUIET) |
| bb_perror_msg("%s", fileName); /* A filename can have % in it... */ |
| return FALSE; |
| } |
| |
| int chown_main(int argc, char **argv) |
| { |
| char *groupName; |
| int retval = EXIT_SUCCESS; |
| |
| opt_complementary = "-2"; |
| getopt32(argc, argv, OPT_STR); |
| argv += optind; |
| |
| if (OPT_NODEREF) chown_func = lchown; |
| |
| /* First, check if there is a group name here */ |
| groupName = strchr(*argv, '.'); /* deprecated? */ |
| if (!groupName) { |
| groupName = strchr(*argv, ':'); |
| } |
| |
| /* First, try parsing "user[:[group]]" */ |
| if (!groupName) { /* "user" */ |
| uid = get_ug_id(*argv, xuname2uid); |
| } else if (groupName == *argv) { /* ":group" */ |
| gid = get_ug_id(groupName + 1, xgroup2gid); |
| } else { |
| struct bb_uidgid_t ugid; |
| if (!groupName[1]) /* "user:" */ |
| *groupName = '\0'; |
| if (!get_uidgid(&ugid, *argv, 1)) |
| bb_error_msg_and_die("unknown user/group %s", *argv); |
| uid = ugid.uid; |
| gid = ugid.gid; |
| } |
| |
| /* Ok, ready to do the deed now */ |
| argv++; |
| do { |
| if (!recursive_action(*argv, |
| OPT_RECURSE, // recurse |
| FALSE, // follow links: TODO: -H/-L/-P |
| FALSE, // depth first |
| fileAction, // file action |
| fileAction, // dir action |
| NULL, // user data |
| 0) // depth |
| ) { |
| retval = EXIT_FAILURE; |
| } |
| } while (*++argv); |
| |
| return retval; |
| } |