Chris Hofstaedtler
89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
/*
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* SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
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* SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
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* SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
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* SPDX-FileCopyrightText: 2008 , Nicolas François
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <config.h>
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#ident "$Id$"
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include "atoi/getnum.h"
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#include "defines.h"
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#include "prototypes.h"
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#include "shadowlog_internal.h"
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#include "string/strcmp/streq.h"
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#include "string/strtok/stpsep.h"
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#include "string/strtok/strsep2arr.h"
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/*
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* sgetpwent - convert a string to a (struct passwd)
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*
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* sgetpwent() parses a string into the parts required for a password
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* structure. Strict checking is made for the UID and GID fields and
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* presence of the correct number of colons. Any failing tests result
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* in a NULL pointer being returned.
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*
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* NOTE: This function uses hard-coded string scanning functions for
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* performance reasons. I am going to come up with some conditional
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* compilation glarp to improve on this in the future.
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*/
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struct passwd *
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sgetpwent(const char *s)
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{
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static char *dup = NULL;
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static struct passwd pwent;
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char *fields[7];
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free(dup);
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dup = strdup(s);
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if (dup == NULL)
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return NULL;
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stpsep(dup, "\n");
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if (STRSEP2ARR(dup, ":", fields) == -1)
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return NULL;
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/*
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* The UID and GID must be non-blank.
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*/
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if (streq(fields[2], ""))
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return NULL;
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if (streq(fields[3], ""))
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return NULL;
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/*
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* Each of the fields is converted to the appropriate data type
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* and the result assigned to the password structure. If the
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* UID or GID does not convert to an integer value, a NULL
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* pointer is returned.
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*/
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pwent.pw_name = fields[0];
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pwent.pw_passwd = fields[1];
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if (get_uid(fields[2], &pwent.pw_uid) == -1) {
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return NULL;
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}
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if (get_gid(fields[3], &pwent.pw_gid) == -1) {
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return NULL;
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}
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pwent.pw_gecos = fields[4];
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pwent.pw_dir = fields[5];
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pwent.pw_shell = fields[6];
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return &pwent;
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}
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