diff options
Diffstat (limited to 'libpamc/pamc_client.c')
| -rw-r--r-- | libpamc/pamc_client.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/libpamc/pamc_client.c b/libpamc/pamc_client.c new file mode 100644 index 0000000..175f424 --- /dev/null +++ b/libpamc/pamc_client.c @@ -0,0 +1,189 @@ +/* + * $Id$ + * + * 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; +} |