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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-02-26 22:47:42 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-02-26 22:47:42 +0000
commitcce38586aee7fe892ca1c837ee08a96bd3454ee9 (patch)
tree2cce1db0f921fdc3e899641dd9c59f459ce4b07d /libpwdgrp
parentf8ea0f3a66559a00c41fd7877bdc241973a60f8c (diff)
downloadbusybox-cce38586aee7fe892ca1c837ee08a96bd3454ee9.tar.gz
busybox-cce38586aee7fe892ca1c837ee08a96bd3454ee9.tar.bz2
start_stop_daemon: add -chuid support
Diffstat (limited to 'libpwdgrp')
-rw-r--r--libpwdgrp/uidgid_get.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/libpwdgrp/uidgid_get.c b/libpwdgrp/uidgid_get.c
index 69c228e16..f10b40654 100644
--- a/libpwdgrp/uidgid_get.c
+++ b/libpwdgrp/uidgid_get.c
@@ -27,6 +27,7 @@ ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "busybox.h"
+/* Always sets uid and gid */
int get_uidgid(struct bb_uidgid_t *u, const char *ug, int numeric_ok)
{
struct passwd *pwd;
@@ -53,6 +54,7 @@ int get_uidgid(struct bb_uidgid_t *u, const char *ug, int numeric_ok)
goto skip;
}
}
+ /* Either it is not numeric, or caller disallows numeric username */
pwd = getpwnam(user);
if (!pwd)
return 0;
@@ -75,6 +77,40 @@ int get_uidgid(struct bb_uidgid_t *u, const char *ug, int numeric_ok)
return 1;
}
+/* chown-like:
+ * "user" sets uid only,
+ * ":group" sets gid only
+ * "user:" sets uid and gid (to user's primary group id)
+ * "user:group" sets uid and gid
+ * ('unset' uid or gid is actually set to -1)
+ */
+void parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group)
+{
+ char *group;
+
+ u->uid = -1;
+ u->gid = -1;
+
+ /* Check if there is a group name */
+ group = strchr(user_group, '.'); /* deprecated? */
+ if (!group)
+ group = strchr(user_group, ':');
+ else
+ *group = ':'; /* replace '.' with ':' */
+
+ /* Parse "user[:[group]]" */
+ if (!group) { /* "user" */
+ u->uid = get_ug_id(user_group, xuname2uid);
+ } else if (group == user_group) { /* ":group" */
+ u->gid = get_ug_id(group + 1, xgroup2gid);
+ } else {
+ if (!group[1]) /* "user:" */
+ *group = '\0';
+ if (!get_uidgid(u, user_group, 1))
+ bb_error_msg_and_die("unknown user/group %s", user_group);
+ }
+}
+
#if 0
#include <stdio.h>
int main()