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