Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 8e7923c1 authored by Stephen Smalley's avatar Stephen Smalley Committed by Steve Kondik
Browse files

Add support for -R (recurse) to init chown builtin. 



This is helpful for setting ownerships on entire directory trees,
such as sysfs and selinuxfs, particularly when the precise set of
files is dynamically generated at runtime.

Change-Id: I81070ea36fd7ffcab4ee8b3ef1bb0028d4b7839c
Signed-off-by: default avatarStephen Smalley <sds@tycho.nsa.gov>
parent d4a936e3

init/builtins.c

+42 −0
Original line number Diff line number Diff line
@@ -35,6 +35,7 @@ 
#include <cutils/partition_utils.h>

#include <sys/system_properties.h>

#include <fs_mgr.h>

#include <fts.h>



#include <selinux/selinux.h>

#include <selinux/label.h>
@@ -801,6 +802,47 @@ int do_chown(int nargs, char **args) { 
    } else if (nargs == 4) {

        if (_chown(args[3], decode_uid(args[1]), decode_uid(args[2])) < 0)

            return -errno;

    } else if (nargs == 5) {

        int ret = 0;

        int ftsflags = FTS_PHYSICAL;

        FTS *fts;

        FTSENT *ftsent;

        char *options = args[1];

        uid_t uid = decode_uid(args[2]);

        uid_t gid = decode_uid(args[3]);

        char * path_argv[] = {args[4], NULL};

        if (strcmp(options, "-R")) {

            ERROR("do_chown: Invalid argument: %s\n", args[1]);

            return -EINVAL;

        }

        fts = fts_open(path_argv, ftsflags, NULL);

        if (!fts) {

            ERROR("do_chown: Error traversing hierarchy starting at %s\n", path_argv[0]);

            return -errno;

        }

        while ((ftsent = fts_read(fts))) {

            switch (ftsent->fts_info) {

            case FTS_DP:

            case FTS_SL:

                break;

            case FTS_DNR:

            case FTS_ERR:

            case FTS_NS:

                ERROR("do_chown: Could not access %s\n", ftsent->fts_path);

                fts_set(fts, ftsent, FTS_SKIP);

                ret = -errno;

                break;

            default:

                if (_chown(ftsent->fts_accpath, uid, gid) < 0) {

                    ret = -errno;

                    fts_set(fts, ftsent, FTS_SKIP);

                }

                break;

            }

        }

        fts_close(fts);

        if (ret)

            return ret;

    } else {

        return -1;

    }

init/readme.txt

+2 −2
Original line number Diff line number Diff line
@@ -158,8 +158,8 @@ chdir <directory> 
chmod <octal-mode> <path>

   Change file access permissions.



chown <owner> <group> <path>

   Change file owner and group.

chown [-R] <owner> <group> <path>

   Change file owner and group. "-R" is for recursive chown.



chroot <directory>

  Change process root directory.