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7eb79fff10
Hi Erik,
Hi to all,
This is part five of the my_get*id story.
I've tweaked a bit this two functions to make them more flexible,
but this changes will not affect existing code.
Now they work so:
1) my_getpwuid( char *user, uid_t uid, int bufsize)
if bufsize is > 0 char *user cannot be set to NULL
on success username is written on static allocated buffer
on failure uid as string is written to buffer and NULL is returned
if bufsize is = 0 char *user can be set to NULL
on success username is returned
on failure NULL is returned
if bufsize is < 0 char *user can be set to NULL
on success username is returned
on failure an error message is printed and the program exits
2) 1) my_getgrgid( char *group, uid_t uid, int bufsize)
if bufsize is > 0 char *group cannot be set to NULL
on success groupname is written on static allocated buffer
on failure gid as string is written to buffer 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
This changes were needed mainly for my new id applet.
It is somewhat bigger then the previous but matches the behaviour of GNU id
and is capable to handle usernames of whatever length.
BTW: at a first look it seems to me that it will integrate well (with just a few changes)
with the pending patch in patches/id_groups_alias.patch.
The increase in size is balanced by the removal of my_getpwnamegid.c
from libbb as this was used only in previous id applet and by size optimizations
made possible in whoami.c and in passwd.c.
I know that we are in feature freeze but I think that i've tested it enough
(at least I hope so.......).
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
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* flexible :
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*
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* if bufsize is > 0 char *user can not be set to NULL
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* on success username is written on static allocated buffer
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* on failure uid as string is written to buffer and NULL is returned
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* if bufsize is = 0 char *user can be set to NULL
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* on success username is returned
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* on failure NULL is returned
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* if bufsize is < 0 char *user can be set to NULL
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* on success username is returned
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* on failure an error message is printed and the program exits
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*/
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include "libbb.h"
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#include "pwd_.h"
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#include "grp_.h"
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/* gets a username given a uid */
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char * my_getpwuid(char *name, long uid, int bufsize)
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{
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struct passwd *myuser;
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myuser = getpwuid(uid);
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if (myuser==NULL) {
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if(bufsize > 0) {
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assert(name != NULL);
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snprintf(name, bufsize, "%ld", (long)uid);
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}
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if (bufsize < 0 ) {
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bb_error_msg_and_die("unknown uid %ld", (long)uid);
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}
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return NULL;
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} else {
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if(bufsize > 0 )
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{
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assert(name != NULL);
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return safe_strncpy(name, myuser->pw_name, bufsize);
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}
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return myuser->pw_name;
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}
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}
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/* END CODE */
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/*
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Local Variables:
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c-file-style: "linux"
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c-basic-offset: 4
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tab-width: 4
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End:
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*/
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