From 829fea46179b8d5cf25f8eae0b78550e3539ad60 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Thu, 23 Apr 2009 18:29:30 +0000 Subject: [BZ #9955] 2009-04-23 Ulrich Drepper [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. --- gshadow/fgetsgent.c | 88 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 88 insertions(+) create mode 100644 gshadow/fgetsgent.c (limited to 'gshadow/fgetsgent.c') diff --git a/gshadow/fgetsgent.c b/gshadow/fgetsgent.c new file mode 100644 index 0000000000..098edfe52e --- /dev/null +++ b/gshadow/fgetsgent.c @@ -0,0 +1,88 @@ +/* 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 +#include +#include +#include +#include + + +/* 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); + +libc_freeres_ptr (static char *buffer); + +/* Read one shadow entry from the given stream. */ +struct sgrp * +fgetsgent (FILE *stream) +{ + static size_t buffer_size; + static struct sgrp resbuf; + fpos_t pos; + struct sgrp *result; + int save; + + if (fgetpos (stream, &pos) != 0) + return NULL; + + /* 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 + && (__fgetsgent_r (stream, &resbuf, buffer, buffer_size, &result) + == 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; + + /* Reset the stream. */ + if (fsetpos (stream, &pos) != 0) + buffer = NULL; + } + + if (buffer == NULL) + result = NULL; + + /* Release lock. Preserve error value. */ + save = errno; + __libc_lock_unlock (lock); + __set_errno (save); + + return result; +} -- cgit 1.4.1