diff options
Diffstat (limited to 'lib/groupmem.c')
| -rw-r--r-- | lib/groupmem.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/lib/groupmem.c b/lib/groupmem.c new file mode 100644 index 0000000..1fd1c13 --- /dev/null +++ b/lib/groupmem.c @@ -0,0 +1,106 @@ +/* + * Copyright (c) 1990 - 1994, Julianne Frances Haugh + * Copyright (c) 1996 - 2000, Marek Michałkiewicz + * Copyright (c) 2001 , Michał Moskal + * Copyright (c) 2005 , Tomasz Kłoczko + * Copyright (c) 2007 - 2013, 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 "prototypes.h" +#include "defines.h" +#include "groupio.h" + +/*@null@*/ /*@only@*/struct group *__gr_dup (const struct group *grent) +{ + struct group *gr; + int i; + + gr = (struct group *) malloc (sizeof *gr); + if (NULL == gr) { + return NULL; + } + /* The libc might define other fields. They won't be copied. */ + memset (gr, 0, sizeof *gr); + gr->gr_gid = grent->gr_gid; + /*@-mustfreeonly@*/ + gr->gr_name = strdup (grent->gr_name); + /*@=mustfreeonly@*/ + if (NULL == gr->gr_name) { + gr_free(gr); + return NULL; + } + /*@-mustfreeonly@*/ + gr->gr_passwd = strdup (grent->gr_passwd); + /*@=mustfreeonly@*/ + if (NULL == gr->gr_passwd) { + gr_free(gr); + return NULL; + } + + for (i = 0; grent->gr_mem[i]; i++); + + /*@-mustfreeonly@*/ + gr->gr_mem = (char **) malloc ((i + 1) * sizeof (char *)); + /*@=mustfreeonly@*/ + if (NULL == gr->gr_mem) { + gr_free(gr); + return NULL; + } + for (i = 0; grent->gr_mem[i]; i++) { + gr->gr_mem[i] = strdup (grent->gr_mem[i]); + if (NULL == gr->gr_mem[i]) { + gr_free(gr); + return NULL; + } + } + gr->gr_mem[i] = NULL; + + return gr; +} + +void gr_free (/*@out@*/ /*@only@*/struct group *grent) +{ + free (grent->gr_name); + if (NULL != grent->gr_passwd) { + memzero (grent->gr_passwd, strlen (grent->gr_passwd)); + free (grent->gr_passwd); + } + if (NULL != grent->gr_mem) { + size_t i; + for (i = 0; NULL != grent->gr_mem[i]; i++) { + free (grent->gr_mem[i]); + } + free (grent->gr_mem); + } + free (grent); +} + |