/* * $Id: pamc_client.c,v 1.1.1.1 2000/06/20 22:11:25 agmorgan Exp $ * * Copyright (c) Andrew G. Morgan * * 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; }