aboutsummaryrefslogtreecommitdiff
path: root/gshadow/sgetsgent.c
diff options
context:
space:
mode:
authorUlrich Drepper <drepper@redhat.com>2009-04-23 18:29:30 +0000
committerUlrich Drepper <drepper@redhat.com>2009-04-23 18:29:30 +0000
commit829fea46179b8d5cf25f8eae0b78550e3539ad60 (patch)
tree6f89526d907c86329565d6ebc825aaf7a32fa1d1 /gshadow/sgetsgent.c
parent5497de87c94539c327c8341f3633b99d5b2dd674 (diff)
downloadglibc-829fea46179b8d5cf25f8eae0b78550e3539ad60.tar
glibc-829fea46179b8d5cf25f8eae0b78550e3539ad60.tar.gz
glibc-829fea46179b8d5cf25f8eae0b78550e3539ad60.tar.bz2
glibc-829fea46179b8d5cf25f8eae0b78550e3539ad60.zip
[BZ #9955]
2009-04-23 Ulrich Drepper <drepper@redhat.com> [BZ #9955] * gshadow/Makefile: New file. * gshadow/Versions: New file. * gshadow/fgetsgent.c: New file. * gshadow/fgetsgent_r.c: New file. * gshadow/getsgent.c: New file. * gshadow/getsgent_r.c: New file. * gshadow/getsgnam.c: New file. * gshadow/getsgnam_r.c: New file. * gshadow/gshadow.h: New file. * gshadow/putsgent.c: New file. * gshadow/sgetsgent.c: New file. * gshadow/sgetsgent_r.c: New file. * gshadow/tst-gshadow.c: New file. * include/gshadow.h: New file. * Makeconfig (all-subdirs): Add gshadow. * Makefile (installed-headers): Add gshadow/gshadow.h. * nss/Makefile (databases): Add sgrp. * nss/Versions: Add gshadow functions as private exports. * nss/nsswitch.conf: Add gshadow entry. * nss/sgrp-lookup.c: New file. * nss/nss_files/files-parse.c: Add STRING_LIST macro. Rewrite parse_list to handle STRING_LIST and TRAILING_LIST_PARSER. * nss/nss_files/files-sgrp.c: New file. * sysdeps/generic/paths.h: Add _PATH_GSHADOW. * sysdeps/unix/sysv/linux/paths.h: Likewise.
Diffstat (limited to 'gshadow/sgetsgent.c')
-rw-r--r--gshadow/sgetsgent.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/gshadow/sgetsgent.c b/gshadow/sgetsgent.c
new file mode 100644
index 0000000000..94e131566b
--- /dev/null
+++ b/gshadow/sgetsgent.c
@@ -0,0 +1,78 @@
+/* Copyright (C) 2009 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <errno.h>
+#include <bits/libc-lock.h>
+#include <gshadow.h>
+#include <stdlib.h>
+
+
+/* A reasonable size for a buffer to start with. */
+#define BUFLEN_SPWD 1024
+
+/* We need to protect the dynamic buffer handling. */
+__libc_lock_define_initialized (static, lock);
+
+/* Read one shadow entry from the given stream. */
+struct sgrp *
+sgetsgent (const char *string)
+{
+ static char *buffer;
+ static size_t buffer_size;
+ static struct sgrp resbuf;
+ struct sgrp *result;
+ int save;
+
+ /* Get lock. */
+ __libc_lock_lock (lock);
+
+ /* Allocate buffer if not yet available. */
+ if (buffer == NULL)
+ {
+ buffer_size = BUFLEN_SPWD;
+ buffer = malloc (buffer_size);
+ }
+
+ while (buffer != NULL
+ && __sgetsgent_r (string, &resbuf, buffer, buffer_size, &result) != 0
+ && errno == ERANGE)
+ {
+ char *new_buf;
+ buffer_size += BUFLEN_SPWD;
+ new_buf = realloc (buffer, buffer_size);
+ if (new_buf == NULL)
+ {
+ /* We are out of memory. Free the current buffer so that the
+ process gets a chance for a normal termination. */
+ save = errno;
+ free (buffer);
+ __set_errno (save);
+ }
+ buffer = new_buf;
+ }
+
+ if (buffer == NULL)
+ result = NULL;
+
+ /* Release lock. Preserve error value. */
+ save = errno;
+ __libc_lock_unlock (lock);
+ __set_errno (save);
+
+ return result;
+}