busybox/libbb/my_getug.c
Glenn L McGrath f15dfc5570 Tito writes,
"This patch fixes all the bugs in id previously spotted by vodz and me.
The binary size increased a bit,  but now it should work as expected."
2004-09-15 03:04:08 +00:00

65 lines
2.0 KiB
C

/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright (C) 2004 by Tito Ragusa <farmatito@tiscali.it>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
*
* if bufsize is > 0 char *idname can not be set to NULL.
* On success idname is written on static allocated buffer
* (and a pointer to it is returned).
* On failure uid or gid as string is written to static allocated buffer
* and NULL is returned.
* if bufsize is = 0 char *idname can be set to NULL.
* On success idname is returned.
* On failure NULL is returned.
* if bufsize is < 0 char *idname can be set to NULL.
* On success idname is returned.
* On failure an error message is printed and the program exits.
*/
#include <stdio.h>
#include <assert.h>
#include "libbb.h"
/* internal function for my_getpwuid and my_getgrgid */
char * my_getug(char *buffer, char *idname, long id, int bufsize, char prefix)
{
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;
}
/* END CODE */
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/