diff options
author | Denis Vlasenko <vda.linux@googlemail.com> | 2008-12-03 01:56:59 +0300 |
---|---|---|
committer | Denis Vlasenko <vda.linux@googlemail.com> | 2008-12-03 01:56:59 +0300 |
commit | 0c68a874e7d996c62c8d00b0c0289180bdce1590 (patch) | |
tree | 57a06bc9317dd24ccf417874c2ecfb10b056adb2 /libbb/bb_pwd.c | |
parent | b6ddee242592ffd02c05ae3ed6127c1dd80d7580 (diff) |
libbb: password/group function helpers rewritten by Tito:
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
Diffstat (limited to 'libbb/bb_pwd.c')
-rw-r--r-- | libbb/bb_pwd.c | 106 |
1 files changed, 55 insertions, 51 deletions
diff --git a/libbb/bb_pwd.c b/libbb/bb_pwd.c index 65eb69200..5e44edc90 100644 --- a/libbb/bb_pwd.c +++ b/libbb/bb_pwd.c @@ -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); + struct group *gr = getgrgid(gid); + if (!gr) + bb_error_msg_and_die("unknown gid %u", (unsigned)gid); + return gr; +} - return bb_getug(name, bufsize, - (myuser ? myuser->pw_name : (char*)myuser), - uid, 'u'); +char* FAST_FUNC xuid2uname(uid_t uid) +{ + struct passwd *pw = xgetpwuid(uid); + return pw->pw_name; } -/* gets a groupname given a gid */ -char* FAST_FUNC bb_getgrgid(char *group, int bufsize, long gid) + +char* FAST_FUNC xgid2group(gid_t gid) { - struct group *mygroup = getgrgid(gid); + struct group *gr = xgetgrgid(gid); + return gr->gr_name; +} - return bb_getug(group, bufsize, - (mygroup ? mygroup->gr_name : (char*)mygroup), - gid, 'g'); +char* FAST_FUNC uid2uname(uid_t uid) +{ + struct passwd *pw = getpwuid(uid); + return (pw) ? pw->pw_name : NULL; } -/* returns a gid given a group name */ -long FAST_FUNC xgroup2gid(const char *name) +char* FAST_FUNC gid2group(gid_t gid) { - struct group *mygroup; + struct group *gr = getgrgid(gid); + return (gr) ? gr->gr_name : NULL; +} - mygroup = getgrnam(name); - if (mygroup == NULL) - bb_error_msg_and_die("unknown group name: %s", name); +char* FAST_FUNC uid2uname_utoa(long uid) +{ + char *name = uid2uname(uid); + return (name) ? name : utoa(uid); +} - return mygroup->gr_gid; +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 *)) { |