diff options
Diffstat (limited to 'lib/pwmem.c')
| -rw-r--r-- | lib/pwmem.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/lib/pwmem.c b/lib/pwmem.c new file mode 100644 index 0000000..17d2eb2 --- /dev/null +++ b/lib/pwmem.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) 2003 - 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 <stdio.h> +#include "defines.h" +#include "prototypes.h" +#include "pwio.h" + +/*@null@*/ /*@only@*/struct passwd *__pw_dup (const struct passwd *pwent) +{ + struct passwd *pw; + + pw = (struct passwd *) malloc (sizeof *pw); + if (NULL == pw) { + return NULL; + } + /* The libc might define other fields. They won't be copied. */ + memset (pw, 0, sizeof *pw); + pw->pw_uid = pwent->pw_uid; + pw->pw_gid = pwent->pw_gid; + /*@-mustfreeonly@*/ + pw->pw_name = strdup (pwent->pw_name); + /*@=mustfreeonly@*/ + if (NULL == pw->pw_name) { + pw_free(pw); + return NULL; + } + /*@-mustfreeonly@*/ + pw->pw_passwd = strdup (pwent->pw_passwd); + /*@=mustfreeonly@*/ + if (NULL == pw->pw_passwd) { + pw_free(pw); + return NULL; + } + /*@-mustfreeonly@*/ + pw->pw_gecos = strdup (pwent->pw_gecos); + /*@=mustfreeonly@*/ + if (NULL == pw->pw_gecos) { + pw_free(pw); + return NULL; + } + /*@-mustfreeonly@*/ + pw->pw_dir = strdup (pwent->pw_dir); + /*@=mustfreeonly@*/ + if (NULL == pw->pw_dir) { + pw_free(pw); + return NULL; + } + /*@-mustfreeonly@*/ + pw->pw_shell = strdup (pwent->pw_shell); + /*@=mustfreeonly@*/ + if (NULL == pw->pw_shell) { + pw_free(pw); + return NULL; + } + + return pw; +} + +void pw_free (/*@out@*/ /*@only@*/struct passwd *pwent) +{ + free (pwent->pw_name); + if (pwent->pw_passwd) { + memzero (pwent->pw_passwd, strlen (pwent->pw_passwd)); + free (pwent->pw_passwd); + } + free (pwent->pw_gecos); + free (pwent->pw_dir); + free (pwent->pw_shell); + free (pwent); +} + |