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/*
* __getspent_r.c - Based on __getpwent_r.c
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <shadow.h>
int __getspent_r(struct spwd * spwd, char * line_buff, size_t buflen, int spwd_fd)
{
char *endptr;
int line_len;
/* We use the restart label to handle malformatted lines */
restart:
/* Read the shadow line into the static buffer using a minimal of
syscalls. */
if ((line_len = read(spwd_fd, line_buff, buflen)) <= 0)
return -1;
endptr = strchr(line_buff, '\n');
if (endptr != NULL)
lseek(spwd_fd, (long) (1 + endptr - (line_buff + line_len)),
SEEK_CUR);
else { /* The line is too long - skip it. :-\ */
do {
if ((line_len = read(spwd_fd, line_buff, buflen)) <= 0)
return -1;
} while (!(endptr = strchr(line_buff, '\n')));
lseek(spwd_fd, (long) (endptr - line_buff) - line_len + 1,
SEEK_CUR);
goto restart;
}
if (__sgetspent_r(line_buff, spwd, line_buff, buflen) < 0)
goto restart;
return 0;
}
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