diff options
Diffstat (limited to 'libmisc/getgr_nam_gid.c')
| -rw-r--r-- | libmisc/getgr_nam_gid.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/libmisc/getgr_nam_gid.c b/libmisc/getgr_nam_gid.c new file mode 100644 index 00000000..027280a5 --- /dev/null +++ b/libmisc/getgr_nam_gid.c @@ -0,0 +1,66 @@ +/* + * Copyright (c) 1991 - 1994, Julianne Frances Haugh + * Copyright (c) 1996 - 2000, Marek Michałkiewicz + * Copyright (c) 2000 - 2006, Tomasz Kłoczko + * Copyright (c) 2007 - 2009, Nicolas François + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the copyright holders or contributors may not be used to + * endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <config.h> + +#ident "$Id$" + +#include <stdlib.h> +#include <errno.h> +#include <grp.h> +#include "prototypes.h" + +/* + * getgr_nam_gid - Return a pointer to the group specified by a string. + * The string may be a valid GID or a valid groupname. + * If the group does not exist on the system, NULL is returned. + */ +extern /*@only@*//*@null@*/struct group *getgr_nam_gid (/*@null@*/const char *grname) +{ + long long int gid; + char *endptr; + + if (NULL == grname) { + return NULL; + } + + errno = 0; + gid = strtoll (grname, &endptr, 10); + if ( ('\0' != *grname) + && ('\0' == *endptr) + && (ERANGE != errno) + && (/*@+longintegral@*/gid == (gid_t)gid)/*@=longintegral@*/) { + return xgetgrgid ((gid_t) gid); + } + return xgetgrnam (grname); +} + |