cronie/src/user.c

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2017-05-08 15:30:03 +02:00
/* Copyright 1988,1990,1993,1994 by Paul Vixie
* All rights reserved
*/
/*
* 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.
*/
/* vix 26jan87 [log is in RCS file]
*/
#include <cron.h>
static const char *FileName;
static void
log_error (const char *msg)
{
log_it ("CRON", getpid (), msg, FileName, 0);
}
void
free_user (user * u) {
entry *e, *ne;
free(u->name);
free(u->tabname);
for (e = u->crontab; e != NULL; e = ne) {
ne = e->next;
free_entry(e);
}
free_security_context(&(u->scontext));
free(u);
}
user *
load_user (int crontab_fd, struct passwd *pw, const char *uname,
const char *fname, const char *tabname) {
char envstr[MAX_ENVSTR];
FILE *file;
user *u;
entry *e;
int status, save_errno = errno;
char **envp = NULL, **tenvp;
if (!(file = fdopen(crontab_fd, "r"))) {
int save_errno = errno;
log_it(uname, getpid (), "FAILED", "fdopen on crontab_fd in load_user",
save_errno);
close(crontab_fd);
return (NULL);
}
Debug(DPARS, ("load_user()\n"))
/* file is open. build user entry, then read the crontab file.
*/
if ((u = (user *) malloc (sizeof (user))) == NULL)
goto done;
memset(u, 0, sizeof(*u));
if (((u->name = strdup(fname)) == NULL)
|| ((u->tabname = strdup(tabname)) == NULL)) {
save_errno = errno;
free_user(u);
u = NULL;
goto done;
}
/* init environment. this will be copied/augmented for each entry.
*/
if ((envp = env_init()) == NULL) {
save_errno = errno;
free_user(u);
u = NULL;
goto done;
}
if (get_security_context(pw == NULL ? NULL : uname,
crontab_fd, &u->scontext, tabname) != 0) {
free_user (u);
u = NULL;
goto done;
}
/* load the crontab
*/
while ((status = load_env (envstr, file)) >= OK) {
switch (status) {
case ERR:
save_errno = errno;
free_user(u);
u = NULL;
goto done;
case FALSE:
FileName = tabname;
e = load_entry(file, log_error, pw, envp);
if (e) {
e->next = u->crontab;
u->crontab = e;
}
break;
case TRUE:
if ((tenvp = env_set (envp, envstr)) == NULL) {
save_errno = errno;
free_user(u);
u = NULL;
goto done;
}
envp = tenvp;
break;
}
}
done:
if (envp)
env_free(envp);
fclose(file);
Debug(DPARS, ("...load_user() done\n"))
errno = save_errno;
return (u);
}