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/*
* $Id$
*
* Copyright (c) Andrew G. Morgan <morgan@ftp.kernel.org>
*
* pamc_start and pamc_end
*/
#include "libpamc.h"
/*
* liberate path list
*/
static void __pamc_delete_path_list(pamc_handle_t pch)
{
int i;
for (i=0; pch->agent_paths[i]; ++i) {
free(pch->agent_paths[i]);
pch->agent_paths[i] = NULL;
}
free(pch->agent_paths);
pch->agent_paths = NULL;
}
/*
* open the pamc library
*/
pamc_handle_t pamc_start(void)
{
int i, count, last, this;
const char *default_path;
pamc_handle_t pch;
pch = calloc(1, sizeof(struct pamc_handle_s));
if (pch == NULL) {
D(("no memory for *pch"));
return NULL;
}
pch->highest_fd_to_close = _PAMC_DEFAULT_TOP_FD;
default_path = getenv("PAMC_AGENT_PATH");
if (default_path == NULL) {
default_path = PAMC_SYSTEM_AGENT_PATH;
}
/* number of individual paths */
for (count=1, i=0; default_path[i]; ++i) {
if (default_path[i] == PAMC_SYSTEM_AGENT_SEPARATOR) {
++count;
}
}
pch->agent_paths = calloc(count+1, sizeof(char *));
if (pch->agent_paths == NULL) {
D(("no memory for path list"));
goto drop_pch;
}
this = last = i = 0;
while ( default_path[i] || (i != last) ) {
if ( default_path[i] == PAMC_SYSTEM_AGENT_SEPARATOR
|| !default_path[i] ) {
int length;
pch->agent_paths[this] = malloc(length = 1+i-last);
if (pch->agent_paths[this] == NULL) {
D(("no memory for next path"));
goto drop_list;
}
memcpy(pch->agent_paths[this], default_path + last, i-last);
pch->agent_paths[this][i-last] = '\0';
if (length > pch->max_path) {
pch->max_path = length;
}
if (++this == count) {
break;
}
last = ++i;
} else {
++i;
}
}
return pch;
drop_list:
__pamc_delete_path_list(pch);
drop_pch:
free(pch);
return NULL;
}
/*
* shutdown each of the loaded agents and
*/
static int __pamc_shutdown_agents(pamc_handle_t pch)
{
int retval = PAM_BPC_TRUE;
D(("called"));
while (pch->chain) {
pid_t pid;
int status;
pamc_agent_t *this;
this = pch->chain;
D(("cleaning up agent %p", this));
pch->chain = pch->chain->next;
this->next = NULL;
D(("cleaning up agent: %s", this->id));
/* close off contact with agent and wait for it to shutdown */
close(this->writer);
this->writer = -1;
close(this->reader);
this->reader = -1;
pid = waitpid(this->pid, &status, 0);
if (pid == this->pid) {
D(("is exit:%d, exit val:%d",
WIFEXITED(status), WEXITSTATUS(status)));
if (!(WIFEXITED(status) && (WEXITSTATUS(status) == 0))) {
retval = PAM_BPC_FALSE;
}
} else {
D(("problem shutting down agent (%s): pid(%d) != waitpid(%d)!?",
this->id, this->pid, pid));
retval = PAM_BPC_FALSE;
}
pid = this->pid = 0;
memset(this->id, 0, this->id_length);
free(this->id);
this->id = NULL;
this->id_length = 0;
free(this);
this = NULL;
}
return retval;
}
/*
* close the pamc library
*/
int pamc_end(pamc_handle_t *pch_p)
{
int retval;
if (pch_p == NULL) {
D(("called with no pch_p"));
return PAM_BPC_FALSE;
}
if (*pch_p == NULL) {
D(("called with no *pch_p"));
return PAM_BPC_FALSE;
}
D(("removing path_list"));
__pamc_delete_path_list(*pch_p);
D(("shutting down agents"));
retval = __pamc_shutdown_agents(*pch_p);
D(("freeing *pch_p"));
free(*pch_p);
*pch_p = NULL;
return retval;
}
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