mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-13 14:50:17 +00:00
0e1f068108
After commitf9c8b11ed7
"nss: Access nss_files through direct references", when building with -Os, multiple conform/.../linknamespace tests and elf/check-localplt are failing: Extra PLT reference: libc.so: fgetc_unlocked Extra PLT reference: libc.so: getline Or e.g.: [initial] glob -> [libc.a(glob.o)] __getpwnam_r -> [libc.a(getpwnam_r.o)] __nss_database_custom -> [libc.a(nsswitch.o)] __nss_module_get_function -> [libc.a(nss_module.o)] __nss_files_functions -> [libc.a(nss_files_functions.o)] _nss_files_endaliasent -> [libc.a(files-alias.o)] feof_unlocked [initial] glob -> [libc.a(glob.o)] __getpwnam_r -> [libc.a(getpwnam_r.o)] __nss_database_custom -> [libc.a(nsswitch.o)] __nss_module_get_function -> [libc.a(nss_module.o)] __nss_files_functions -> [libc.a(nss_files_functions.o)] _nss_files_endaliasent -> [libc.a(files-alias.o)] fgetc_unlocked [initial] glob -> [libc.a(glob.o)] __getpwnam_r -> [libc.a(getpwnam_r.o)] __nss_database_custom -> [libc.a(nsswitch.o)] __nss_module_get_function -> [libc.a(nss_module.o)] __nss_files_functions -> [libc.a(nss_files_functions.o)] _nss_files_endnetgrent -> [libc.a(files-netgrp.o)] getline This patch is using the hidden symbols where possible. Instead of fputc_unlocked, __putc_unlocked is used. (Compare to commiteeaa19f75e
"mntent: Use __putc_unlocked instead of fputc_unlocked")
131 lines
3.3 KiB
C
131 lines
3.3 KiB
C
/* Initgroups handling in nss_files module.
|
|
Copyright (C) 2011-2021 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <grp.h>
|
|
#include <nss.h>
|
|
#include <stdio_ext.h>
|
|
#include <string.h>
|
|
#include <sys/param.h>
|
|
#include <stdbool.h>
|
|
#include <stdlib.h>
|
|
#include <scratch_buffer.h>
|
|
#include <nss.h>
|
|
#include <nss_files.h>
|
|
|
|
enum nss_status
|
|
_nss_files_initgroups_dyn (const char *user, gid_t group, long int *start,
|
|
long int *size, gid_t **groupsp, long int limit,
|
|
int *errnop)
|
|
{
|
|
FILE *stream = __nss_files_fopen ("/etc/group");
|
|
if (stream == NULL)
|
|
{
|
|
*errnop = errno;
|
|
return *errnop == ENOMEM ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
|
|
}
|
|
|
|
char *line = NULL;
|
|
size_t linelen = 0;
|
|
enum nss_status status = NSS_STATUS_SUCCESS;
|
|
bool any = false;
|
|
|
|
struct scratch_buffer tmpbuf;
|
|
scratch_buffer_init (&tmpbuf);
|
|
|
|
gid_t *groups = *groupsp;
|
|
|
|
/* We have to iterate over the entire file. */
|
|
while (1)
|
|
{
|
|
fpos_t pos;
|
|
fgetpos (stream, &pos);
|
|
ssize_t n = __getline (&line, &linelen, stream);
|
|
if (n < 0)
|
|
{
|
|
if (! __feof_unlocked (stream))
|
|
status = ((*errnop = errno) == ENOMEM
|
|
? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL);
|
|
break;
|
|
}
|
|
|
|
struct group grp;
|
|
int res = _nss_files_parse_grent (line, &grp,
|
|
tmpbuf.data, tmpbuf.length, errnop);
|
|
if (res == -1)
|
|
{
|
|
if (!scratch_buffer_grow (&tmpbuf))
|
|
{
|
|
*errnop = ENOMEM;
|
|
status = NSS_STATUS_TRYAGAIN;
|
|
goto out;
|
|
}
|
|
/* Reread current line, the parser has clobbered it. */
|
|
fsetpos (stream, &pos);
|
|
continue;
|
|
}
|
|
|
|
if (res > 0 && grp.gr_gid != group)
|
|
for (char **m = grp.gr_mem; *m != NULL; ++m)
|
|
if (strcmp (*m, user) == 0)
|
|
{
|
|
/* Matches user. Insert this group. */
|
|
if (*start == *size)
|
|
{
|
|
/* Need a bigger buffer. */
|
|
if (limit > 0 && *size == limit)
|
|
/* We reached the maximum. */
|
|
goto out;
|
|
|
|
long int newsize;
|
|
if (limit <= 0)
|
|
newsize = 2 * *size;
|
|
else
|
|
newsize = MIN (limit, 2 * *size);
|
|
|
|
gid_t *newgroups = realloc (groups,
|
|
newsize * sizeof (*groups));
|
|
if (newgroups == NULL)
|
|
{
|
|
*errnop = ENOMEM;
|
|
status = NSS_STATUS_TRYAGAIN;
|
|
goto out;
|
|
}
|
|
*groupsp = groups = newgroups;
|
|
*size = newsize;
|
|
}
|
|
|
|
groups[*start] = grp.gr_gid;
|
|
*start += 1;
|
|
any = true;
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
out:
|
|
/* Free memory. */
|
|
scratch_buffer_free (&tmpbuf);
|
|
free (line);
|
|
|
|
fclose (stream);
|
|
|
|
return status == NSS_STATUS_SUCCESS && !any ? NSS_STATUS_NOTFOUND : status;
|
|
}
|
|
libc_hidden_def (_nss_files_initgroups_dyn)
|