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libbb: password/group function helpers rewritten by Tito:

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function                                             old     new   delta
xgetpwuid                                              -      27     +27
uid2uname_utoa                                         -      22     +22
gid2group_utoa                                         -      22     +22
uid2uname                                              -      18     +18
gid2group                                              -      18     +18
buffer_fill_and_print                                179     196     +17
print_user                                            12      24     +12
print_group                                           12      24     +12
get_cached                                            89      99     +10
...
print_common                                         134     120     -14
vlock_main                                           415     396     -19
logger_main                                          410     387     -23
crontab_main                                         642     609     -33
bb_getpwuid                                           42       -     -42
bb_getgrgid                                           42       -     -42
bb_getug                                              80       -     -80
------------------------------------------------------------------------------
(add/remove: 6/3 grow/shrink: 9/11 up/down: 187/-296)        Total: -109 bytes
This commit is contained in:
Denis Vlasenko
2008-12-02 22:56:59 +00:00
parent b6ddee2425
commit 0c68a874e7
11 changed files with 90 additions and 100 deletions
Download Patch File Download Diff File Expand all files Collapse all files

118
libbb/bb_pwd.c
View File

@@ -3,79 +3,72 @@
* 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)
/* internal function for bb_getpwuid and bb_getgrgid */
/* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
* flexible:
*
* bufsize > 0: If idname is not NULL it is copied to buffer,
* and buffer is returned. Else id as string is written
* to buffer, and NULL is returned.
*
* bufsize == 0: idname is returned.
*
* bufsize < 0: If idname is not NULL 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)
*/
static char* bb_getug(char *buffer, int bufsize, char *idname, long id, char prefix)
/* TODO: add xgetpwnam, this construct is used a lot */
struct passwd* FAST_FUNC xgetpwuid(uid_t uid)
{
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 = getpwuid(uid);
if (!pw)
bb_error_msg_and_die("unknown uid %u", (unsigned)uid);
return pw;
}
/* bb_getpwuid, bb_getgrgid:
* bb_getXXXid(buf, bufsz, id) - copy user/group name or id
* as a string to buf, return user/group name or NULL
* bb_getXXXid(NULL, 0, id) - return user/group name or NULL
* bb_getXXXid(NULL, -1, id) - return user/group name or exit
*/
/* gets a username given a uid */
char* FAST_FUNC bb_getpwuid(char *name, int bufsize, long uid)
struct group* FAST_FUNC xgetgrgid(gid_t gid)
{
struct passwd *myuser = getpwuid(uid);
return bb_getug(name, bufsize,
(myuser ? myuser->pw_name : (char*)myuser),
uid, 'u');
}
/* gets a groupname given a gid */
char* FAST_FUNC bb_getgrgid(char *group, int bufsize, long gid)
{
struct group *mygroup = getgrgid(gid);
return bb_getug(group, bufsize,
(mygroup ? mygroup->gr_name : (char*)mygroup),
gid, 'g');
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 FAST_FUNC xgroup2gid(const char *name)
char* FAST_FUNC xuid2uname(uid_t uid)
{
struct group *mygroup;
mygroup = getgrnam(name);
if (mygroup == NULL)
bb_error_msg_and_die("unknown group name: %s", name);
return mygroup->gr_gid;
struct passwd *pw = xgetpwuid(uid);
return pw->pw_name;
}
char* FAST_FUNC xgid2group(gid_t gid)
{
struct group *gr = xgetgrgid(gid);
return gr->gr_name;
}
char* FAST_FUNC uid2uname(uid_t uid)
{
struct passwd *pw = getpwuid(uid);
return (pw) ? pw->pw_name : NULL;
}
char* FAST_FUNC gid2group(gid_t gid)
{
struct group *gr = getgrgid(gid);
return (gr) ? gr->gr_name : NULL;
}
char* FAST_FUNC uid2uname_utoa(long uid)
{
char *name = uid2uname(uid);
return (name) ? name : utoa(uid);
}
char* FAST_FUNC gid2group_utoa(long gid)
{
char *name = gid2group(gid);
return (name) ? name : utoa(gid);
}
/* returns a uid given a username */
long FAST_FUNC xuname2uid(const char *name)
{
struct passwd *myuser;
@@ -87,6 +80,17 @@ long FAST_FUNC xuname2uid(const char *name)
return myuser->pw_uid;
}
long FAST_FUNC xgroup2gid(const char *name)
{
struct group *mygroup;
mygroup = getgrnam(name);
if (mygroup == NULL)
bb_error_msg_and_die("unknown group %s", name);
return mygroup->gr_gid;
}
unsigned long FAST_FUNC get_ug_id(const char *s,
long FAST_FUNC (*xname2id)(const char *))
{