* password utility routines.
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ * Copyright (C) 2008 by Tito Ragusa <farmatito@tiscali.it>
*
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
#include "libbb.h"
-#define assert(x) ((void)0)
-
-/*
- * if bufsize is > 0 char *buffer cannot be set to NULL.
- * If idname is not NULL it is written on the static
- * allocated buffer (and a pointer to it is returned).
- * if idname is NULL, id as string is written to the static
- * allocated buffer and NULL is returned.
- * if bufsize is = 0 char *buffer can be set to NULL.
- * If idname exists a pointer to it is returned,
- * else NULL is returned.
- * if bufsize is < 0 char *buffer can be set to NULL.
- * If idname exists a pointer to it is returned,
- * else an error message is printed and the program exits.
+/* TODO: maybe change API to return malloced data?
+ * This will allow to stop using libc functions returning
+ * pointers to static data (getpwuid)
*/
-/* internal function for bb_getpwuid and bb_getgrgid */
-static char* bb_getug(char *buffer, char *idname, long id, int bufsize, char prefix)
+struct passwd* FAST_FUNC xgetpwnam(const char *name)
{
- if (bufsize > 0) {
- assert(buffer != NULL);
- if (idname) {
- return safe_strncpy(buffer, idname, bufsize);
- }
- snprintf(buffer, bufsize, "%ld", id);
- } else if (bufsize < 0 && !idname) {
- bb_error_msg_and_die("unknown %cid %ld", prefix, id);
- }
- return idname;
+ struct passwd *pw = getpwnam(name);
+ if (!pw)
+ bb_error_msg_and_die("unknown user %s", name);
+ return pw;
}
-/* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
- * flexible :
- *
- * if bufsize is > 0 char *group cannot be set to NULL.
- * On success groupname is written on static allocated buffer
- * group (and a pointer to it is returned).
- * On failure gid as string is written to static allocated
- * buffer group and NULL is returned.
- * if bufsize is = 0 char *group can be set to NULL.
- * On success groupname is returned.
- * On failure NULL is returned.
- * if bufsize is < 0 char *group can be set to NULL.
- * On success groupname is returned.
- * On failure an error message is printed and
- * the program exits.
- */
+struct group* FAST_FUNC xgetgrnam(const char *name)
+{
+ struct group *gr = getgrnam(name);
+ if (!gr)
+ bb_error_msg_and_die("unknown group %s", name);
+ return gr;
+}
-/* gets a groupname given a gid */
-char* bb_getgrgid(char *group, long gid, int bufsize)
+
+struct passwd* FAST_FUNC xgetpwuid(uid_t uid)
{
- struct group *mygroup = getgrgid(gid);
+ struct passwd *pw = getpwuid(uid);
+ if (!pw)
+ bb_error_msg_and_die("unknown uid %u", (unsigned)uid);
+ return pw;
+}
- return bb_getug(group,
- mygroup ? mygroup->gr_name : (char *)mygroup,
- gid, bufsize, 'g');
+struct group* FAST_FUNC xgetgrgid(gid_t gid)
+{
+ struct group *gr = getgrgid(gid);
+ if (!gr)
+ bb_error_msg_and_die("unknown gid %u", (unsigned)gid);
+ return gr;
}
-/* returns a gid given a group name */
-long xgroup2gid(const char *name)
+char* FAST_FUNC xuid2uname(uid_t uid)
{
- struct group *mygroup;
+ struct passwd *pw = xgetpwuid(uid);
+ return pw->pw_name;
+}
- mygroup = getgrnam(name);
- if (mygroup == NULL)
- bb_error_msg_and_die("unknown group name: %s", name);
+char* FAST_FUNC xgid2group(gid_t gid)
+{
+ struct group *gr = xgetgrgid(gid);
+ return gr->gr_name;
+}
- return mygroup->gr_gid;
+char* FAST_FUNC uid2uname(uid_t uid)
+{
+ struct passwd *pw = getpwuid(uid);
+ return (pw) ? pw->pw_name : NULL;
}
-/* returns a uid given a username */
-long xuname2uid(const char *name)
+char* FAST_FUNC gid2group(gid_t gid)
{
- struct passwd *myuser;
+ struct group *gr = getgrgid(gid);
+ return (gr) ? gr->gr_name : NULL;
+}
- myuser = getpwnam(name);
- if (myuser == NULL)
- bb_error_msg_and_die("unknown user name: %s", name);
+char* FAST_FUNC uid2uname_utoa(long uid)
+{
+ char *name = uid2uname(uid);
+ return (name) ? name : utoa(uid);
+}
- return myuser->pw_uid;
+char* FAST_FUNC gid2group_utoa(long gid)
+{
+ char *name = gid2group(gid);
+ return (name) ? name : utoa(gid);
}
-/* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
- * flexible :
- *
- * if bufsize is > 0 char *name cannot be set to NULL.
- * On success username is written on the static allocated
- * buffer name (and a pointer to it is returned).
- * On failure uid as string is written to the static
- * allocated buffer name and NULL is returned.
- * if bufsize is = 0 char *name can be set to NULL.
- * On success username is returned.
- * On failure NULL is returned.
- * if bufsize is < 0 char *name can be set to NULL
- * On success username is returned.
- * On failure an error message is printed and
- * the program exits.
- */
+long FAST_FUNC xuname2uid(const char *name)
+{
+ struct passwd *myuser;
-/* gets a username given a uid */
-char* bb_getpwuid(char *name, long uid, int bufsize)
+ myuser = xgetpwnam(name);
+ return myuser->pw_uid;
+}
+
+long FAST_FUNC xgroup2gid(const char *name)
{
- struct passwd *myuser = getpwuid(uid);
+ struct group *mygroup;
- return bb_getug(name, myuser ? myuser->pw_name : (char *)myuser,
- uid, bufsize, 'u');
+ mygroup = xgetgrnam(name);
+ return mygroup->gr_gid;
}
-unsigned long get_ug_id(const char *s,
- long (*xname2id)(const char *))
+unsigned long FAST_FUNC get_ug_id(const char *s,
+ long FAST_FUNC (*xname2id)(const char *))
{
unsigned long r;
projects / oweals / busybox.git / blobdiff