diff options
Diffstat (limited to 'nss/getXXent.c')
| -rw-r--r-- | nss/getXXent.c | 71 |
1 files changed, 52 insertions, 19 deletions
diff --git a/nss/getXXent.c b/nss/getXXent.c index 7e291e6298..2d6d1c32e6 100644 --- a/nss/getXXent.c +++ b/nss/getXXent.c @@ -1,20 +1,24 @@ /* Copyright (C) 1996 Free Software Foundation, Inc. -This file is part of the GNU C Library. + 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 Library General Public License as -published by the Free Software Foundation; either version 2 of the -License, or (at your option) any later version. + The GNU C 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. -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 -Library General Public License for more details. + 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 + Library General Public License for more details. -You should have received a copy of the GNU Library General Public -License along with the GNU C Library; see the file COPYING.LIB. If -not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <libc-lock.h> +#include <stdlib.h> #include "nsswitch.h" @@ -55,18 +59,47 @@ extern int INTERNAL (REENTRANT_GETNAME) (LOOKUP_TYPE *resbuf, char *buffer, size_t buflen, LOOKUP_TYPE **result H_ERRNO_PARM); +/* We need to protect the dynamic buffer handling. */ +__libc_lock_define_initialized (static, lock); + LOOKUP_TYPE * GETFUNC_NAME (void) { - static char buffer[BUFLEN]; + static char *buffer; + static size_t buffer_size; static LOOKUP_TYPE resbuf; - LOOKUP_TYPE *result; + LOOKUP_TYPE *result = NULL; + int save; + + /* Get lock. */ + __libc_lock_lock (lock); + + if (buffer == NULL) + { + buffer_size = BUFLEN; + buffer = malloc (buffer_size); + } + + while (buffer != NULL + && INTERNAL (REENTRANT_GETNAME) (&resbuf, buffer, buffer_size, &result + H_ERRNO_VAR) != 0 + && errno == ERANGE) + { + char *new_buf; + buffer_size += BUFLEN; + 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. */ + free (buffer); + buffer = new_buf; + } - if (INTERNAL (REENTRANT_GETNAME) (&resbuf, buffer, BUFLEN, &result - H_ERRNO_VAR) != 0) - /* Errors occured. */ - return NULL; + /* Release lock. Preserve error value. */ + save = errno; + __libc_lock_unlock (lock); + __set_errno (save); return result; } |