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/* $OpenBSD: user.c,v 1.21 2018/02/05 03:52:37 millert Exp $ */
/* Copyright 1988,1990,1993,1994 by Paul Vixie
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 1997,2000 by Internet Software Consortium, Inc.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <bitstring.h> /* for structs.h */
#include <ctype.h>
#include <errno.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <time.h> /* for structs.h */
#include "macros.h"
#include "structs.h"
#include "funcs.h"
#include "globals.h"
void
free_user(user *u)
{
entry *e;
while ((e = SLIST_FIRST(&u->crontab))) {
SLIST_REMOVE_HEAD(&u->crontab, entries);
free_entry(e);
}
free(u->name);
free(u);
}
static int ParseErrorCount;
static const char *CrontabFilename;
static void
parse_error(const char *msg)
{
ParseErrorCount++;
syslog(LOG_ERR, "(CRON) %s:%d (%s)", CrontabFilename, LineNumber, msg);
}
user *
load_user(FILE *file, struct passwd *pw, const char *name)
{
char envstr[MAX_ENVSTR];
user *u;
entry *e;
int status, save_errno;
char **envp = NULL, **tenvp;
CrontabFilename = name;
LineNumber = 0;
/* file is open. build user entry, then read the crontab file.
*/
if ((u = malloc(sizeof(user))) == NULL)
goto done;
if ((u->name = strdup(name)) == NULL) {
save_errno = errno;
free(u);
u = NULL;
errno = save_errno;
goto done;
}
SLIST_INIT(&u->crontab);
/* init environment. this will be copied/augmented for each entry.
*/
if ((envp = env_init()) == NULL) {
save_errno = errno;
free_user(u);
u = NULL;
errno = save_errno;
goto done;
}
/* load the crontab
*/
ParseErrorCount = 0;
while ((status = load_env(envstr, file)) >= 0) {
switch (status) {
case FALSE:
/* Not an env variable, parse as crontab entry. */
e = load_entry(file, parse_error, pw, envp);
if (e == NULL) {
/* Parse error, ignore for non-root entries */
if (pw != NULL) {
save_errno = errno;
free_user(u);
u = NULL;
errno = save_errno;
goto done;
}
} else {
SLIST_INSERT_HEAD(&u->crontab, e, entries);
}
break;
case TRUE:
if ((tenvp = env_set(envp, envstr)) == NULL) {
save_errno = errno;
free_user(u);
u = NULL;
errno = save_errno;
goto done;
}
envp = tenvp;
break;
}
}
done:
if (envp != NULL)
env_free(envp);
return (u);
}
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