+++ /dev/null
-/*
- fe-exec.c : irssi
-
- Copyright (C) 2000-2001 Timo Sirainen
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-*/
-
-#include "module.h"
-#include "modules.h"
-#include "signals.h"
-#include "commands.h"
-#include "pidwait.h"
-#include "line-split.h"
-#include "net-sendbuffer.h"
-#include "misc.h"
-#include "levels.h"
-
-#include "servers.h"
-#include "channels.h"
-#include "queries.h"
-
-#include "printtext.h"
-#include "fe-exec.h"
-#include "fe-windows.h"
-#include "window-items.h"
-
-#include <signal.h>
-#include <sys/wait.h>
-
-GSList *processes;
-static int signal_exec_input;
-
-static void exec_wi_destroy(EXEC_WI_REC *rec)
-{
- g_return_if_fail(rec != NULL);
-
- if (rec->destroying) return;
- rec->destroying = TRUE;
-
- rec->process->target_item = NULL;
- if (window_item_window((WI_ITEM_REC *) rec) != NULL)
- window_item_destroy((WI_ITEM_REC *) rec);
-
- MODULE_DATA_DEINIT(rec);
- g_free(rec->visible_name);
- g_free(rec);
-}
-
-static const char *exec_get_target(WI_ITEM_REC *item)
-{
- return ((EXEC_WI_REC *) item)->visible_name;
-}
-
-static EXEC_WI_REC *exec_wi_create(WINDOW_REC *window, PROCESS_REC *rec)
-{
- EXEC_WI_REC *item;
-
- g_return_val_if_fail(window != NULL, NULL);
- g_return_val_if_fail(rec != NULL, NULL);
-
- item = g_new0(EXEC_WI_REC, 1);
- item->type = module_get_uniq_id_str("WINDOW ITEM TYPE", "EXEC");
- item->destroy = (void (*) (WI_ITEM_REC *)) exec_wi_destroy;
- item->get_target = exec_get_target;
- item->visible_name = rec->name != NULL ? g_strdup(rec->name) :
- g_strdup_printf("%%%d", rec->id);
-
- item->createtime = time(NULL);
- item->process = rec;
-
- MODULE_DATA_INIT(item);
- window_item_add(window, (WI_ITEM_REC *) item, FALSE);
- return item;
-}
-
-static int process_get_new_id(void)
-{
- PROCESS_REC *rec;
- GSList *tmp;
- int id;
-
- id = 0;
- tmp = processes;
- while (tmp != NULL) {
- rec = tmp->data;
-
- if (id != rec->id) {
- tmp = tmp->next;
- continue;
- }
-
- id++;
- tmp = processes;
- }
-
- return id;
-}
-
-static PROCESS_REC *process_find_pid(int pid)
-{
- GSList *tmp;
-
- g_return_val_if_fail(pid > 0, NULL);
-
- for (tmp = processes; tmp != NULL; tmp = tmp->next) {
- PROCESS_REC *rec = tmp->data;
-
- if (rec->pid == pid)
- return rec;
- }
-
- return NULL;
-}
-
-static PROCESS_REC *process_find_id(int id, int verbose)
-{
- GSList *tmp;
-
- g_return_val_if_fail(id != -1, NULL);
-
- for (tmp = processes; tmp != NULL; tmp = tmp->next) {
- PROCESS_REC *rec = tmp->data;
-
- if (rec->id == id)
- return rec;
- }
-
- if (verbose) {
- printtext(NULL, NULL, MSGLEVEL_CLIENTERROR,
- "Unknown process id: %d", id);
- }
-
- return NULL;
-}
-
-static PROCESS_REC *process_find(const char *name, int verbose)
-{
- GSList *tmp;
-
- g_return_val_if_fail(name != NULL, NULL);
-
- if (*name == '%' && is_numeric(name+1, 0))
- return process_find_id(atoi(name+1), verbose);
-
- for (tmp = processes; tmp != NULL; tmp = tmp->next) {
- PROCESS_REC *rec = tmp->data;
-
- if (rec->name != NULL && strcmp(rec->name, name) == 0)
- return rec;
- }
-
- if (verbose) {
- printtext(NULL, NULL, MSGLEVEL_CLIENTERROR,
- "Unknown process name: %s", name);
- }
-
- return NULL;
-}
-
-static void process_destroy(PROCESS_REC *rec, int status)
-{
- processes = g_slist_remove(processes, rec);
-
- signal_emit("exec remove", 2, rec, GINT_TO_POINTER(status));
-
- if (rec->read_tag != -1)
- g_source_remove(rec->read_tag);
- if (rec->target_item != NULL)
- exec_wi_destroy(rec->target_item);
-
- line_split_free(rec->databuf);
- g_io_channel_close(rec->in);
- g_io_channel_unref(rec->in);
- net_sendbuffer_destroy(rec->out, TRUE);
-
- g_free_not_null(rec->name);
- g_free_not_null(rec->target);
- g_free_not_null(rec->target_server);
- g_free(rec->args);
- g_free(rec);
-}
-
-static void processes_killall(int signum)
-{
- GSList *tmp;
-
- for (tmp = processes; tmp != NULL; tmp = tmp->next) {
- PROCESS_REC *rec = tmp->data;
-
- kill(rec->pid, signum);
- }
-}
-
-static int signal_name_to_id(const char *name)
-{
- /* check only the few most common signals, too much job to check
- them all. if we sometimes want more, procps-sources/proc/sig.c
- would be useful for copypasting */
- if (g_strcasecmp(name, "hup") == 0)
- return SIGHUP;
- if (g_strcasecmp(name, "int") == 0)
- return SIGINT;
- if (g_strcasecmp(name, "term") == 0)
- return SIGTERM;
- if (g_strcasecmp(name, "kill") == 0)
- return SIGKILL;
- if (g_strcasecmp(name, "usr1") == 0)
- return SIGUSR1;
- if (g_strcasecmp(name, "usr2") == 0)
- return SIGUSR2;
- return -1;
-}
-
-/* `optlist' should contain only one unknown key - the server tag.
- returns NULL if there was unknown -option */
-static int cmd_options_get_signal(const char *cmd,
- GHashTable *optlist)
-{
- GSList *list, *tmp, *next;
- char *signame;
- int signum;
-
- /* get all the options, then remove the known ones. there should
- be only one left - the signal */
- list = hashtable_get_keys(optlist);
- if (cmd != NULL) {
- for (tmp = list; tmp != NULL; tmp = next) {
- char *option = tmp->data;
- next = tmp->next;
-
- if (command_have_option(cmd, option))
- list = g_slist_remove(list, option);
- }
- }
-
- if (list == NULL)
- return -1;
-
- signame = list->data;
- signum = -1;
-
- signum = is_numeric(signame, 0) ? atol(signame) :
- signal_name_to_id(signame);
-
- if (signum == -1 || list->next != NULL) {
- /* unknown option (not a signal) */
- signal_emit("error command", 2,
- GINT_TO_POINTER(CMDERR_OPTION_UNKNOWN),
- signum == -1 ? list->data : list->next->data);
- signal_stop();
- return -2;
- }
-
- g_slist_free(list);
- return signum;
-}
-
-static void exec_show_list(void)
-{
- GSList *tmp;
-
- for (tmp = processes; tmp != NULL; tmp = tmp->next) {
- PROCESS_REC *rec = tmp->data;
-
- printtext(NULL, NULL, MSGLEVEL_CLIENTCRAP,
- "%d (%s): %s", rec->id, rec->name, rec->args);
- }
-}
-
-static void process_exec(PROCESS_REC *rec, const char *cmd)
-{
- const char *shell_args[4] = { "/bin/sh", "-c", NULL, NULL };
- char **args;
- int in[2], out[2];
- int n;
-
- if (pipe(in) == -1)
- return;
- if (pipe(out) == -1)
- return;
-
- shell_args[2] = cmd;
- rec->pid = fork();
- if (rec->pid == -1) {
- /* error */
- close(in[0]); close(in[1]);
- close(out[0]); close(out[1]);
- return;
- }
-
- if (rec->pid != 0) {
- /* parent process */
- GIOChannel *outio = g_io_channel_unix_new(in[1]);
-
- rec->in = g_io_channel_unix_new(out[0]);
- rec->out = net_sendbuffer_create(outio, 0);
-
- close(out[1]);
- close(in[0]);
- pidwait_add(rec->pid);
- return;
- }
-
- /* child process, try to clean up everything */
- setsid();
- setuid(getuid());
- setgid(getgid());
- signal(SIGINT, SIG_IGN);
- signal(SIGQUIT, SIG_DFL);
-
- putenv("TERM=tty");
-
- /* set stdin, stdout and stderr */
- dup2(in[0], STDIN_FILENO);
- dup2(out[1], STDOUT_FILENO);
- dup2(out[1], STDERR_FILENO);
-
- /* don't let child see our files */
- for (n = 3; n < 256; n++)
- close(n);
-
- if (rec->shell) {
- execvp(shell_args[0], (char **) shell_args);
-
- fprintf(stderr, "Exec: /bin/sh: %s\n", g_strerror(errno));
- } else {
- args = g_strsplit(cmd, " ", -1);
- execvp(args[0], args);
-
- fprintf(stderr, "Exec: %s: %s\n", args[0], g_strerror(errno));
- }
-
- _exit(-1);
-}
-
-static void sig_exec_input_reader(PROCESS_REC *rec)
-{
- char tmpbuf[512], *str;
- gsize recvlen;
- int err, ret;
-
- g_return_if_fail(rec != NULL);
-
- recvlen = 0;
- err = g_io_channel_read(rec->in, tmpbuf,
- sizeof(tmpbuf), &recvlen);
- if (err != 0 && err != G_IO_ERROR_AGAIN && errno != EINTR)
- recvlen = -1;
-
- do {
- ret = line_split(tmpbuf, recvlen, &str, &rec->databuf);
- if (ret == -1) {
- /* link to terminal closed? */
- g_source_remove(rec->read_tag);
- rec->read_tag = -1;
- break;
- }
-
- if (ret > 0) {
- signal_emit_id(signal_exec_input, 2, rec, str);
- if (recvlen > 0) recvlen = 0;
- }
- } while (ret > 0);
-}
-
-static void handle_exec(const char *args, GHashTable *optlist,
- SERVER_REC *server, WI_ITEM_REC *item)
-{
- PROCESS_REC *rec;
- SERVER_REC *target_server;
- char *target, *level;
- int notice, signum, interactive, target_nick, target_channel;
-
- /* check that there's no unknown options. we allowed them
- because signals can be used as options, but there should be
- only one unknown option: the signal name/number. */
- signum = cmd_options_get_signal("exec", optlist);
- if (signum == -2)
- return;
-
- if (*args == '\0') {
- exec_show_list();
- return;
- }
-
- target = NULL;
- target_server = NULL;
- notice = FALSE;
-
- if (g_hash_table_lookup(optlist, "in") != NULL) {
- rec = process_find(g_hash_table_lookup(optlist, "in"), TRUE);
- if (rec != NULL) {
- net_sendbuffer_send(rec->out, args, strlen(args));
- net_sendbuffer_send(rec->out, "\n", 1);
- }
- return;
- }
-
- /* check if args is a process ID or name. if it's ID but not found,
- complain about it and fail immediately */
- rec = process_find(args, *args == '%');
- if (*args == '%' && rec == NULL)
- return;
-
- /* common options */
- target_channel = target_nick = FALSE;
- if (g_hash_table_lookup(optlist, "out") != NULL) {
- /* redirect output to active channel/query */
- if (item == NULL)
- cmd_return_error(CMDERR_NOT_JOINED);
- target = (char *) window_item_get_target(item);
- target_server = item->server;
- target_channel = IS_CHANNEL(item);
- target_nick = IS_QUERY(item);
- } else if (g_hash_table_lookup(optlist, "msg") != NULL) {
- /* redirect output to /msg <nick> */
- target = g_hash_table_lookup(optlist, "msg");
- target_server = server;
- } else if (g_hash_table_lookup(optlist, "notice") != NULL) {
- target = g_hash_table_lookup(optlist, "notice");
- target_server = server;
- notice = TRUE;
- }
-
- /* options that require process ID/name as argument */
- if (rec == NULL &&
- (signum != -1 || g_hash_table_lookup(optlist, "close") != NULL)) {
- printtext(NULL, NULL, MSGLEVEL_CLIENTERROR,
- "Unknown process name: %s", args);
- return;
- }
- if (g_hash_table_lookup(optlist, "close") != NULL) {
- /* forcibly close the process */
- process_destroy(rec, -1);
- return;
- }
-
- if (signum != -1) {
- /* send a signal to process */
- kill(rec->pid, signum);
- return;
- }
-
- interactive = g_hash_table_lookup(optlist, "interactive") != NULL;
- if (*args == '%') {
- /* do something to already existing process */
- char *name;
-
- if (target != NULL) {
- /* redirect output to target */
- g_free_and_null(rec->target);
- rec->target = g_strdup(target);
- rec->target_server = target_server == NULL ? NULL :
- g_strdup(target_server->tag);
- rec->notice = notice;
- }
-
- name = g_hash_table_lookup(optlist, "name");
- if (name != NULL) {
- /* change window name */
- g_free_not_null(rec->name);
- rec->name = *name == '\0' ? NULL : g_strdup(name);
- } else if (target == NULL &&
- (rec->target_item == NULL || interactive)) {
- /* no parameters given,
- redirect output to the active window */
- g_free_and_null(rec->target);
- rec->target_win = active_win;
-
- if (rec->target_item != NULL)
- exec_wi_destroy(rec->target_item);
-
- if (interactive) {
- rec->target_item =
- exec_wi_create(active_win, rec);
- }
- }
- return;
- }
-
- /* starting a new process */
- rec = g_new0(PROCESS_REC, 1);
- rec->pid = -1;
- rec->shell = g_hash_table_lookup(optlist, "nosh") == NULL;
-
- process_exec(rec, args);
- if (rec->pid == -1) {
- /* pipe() or fork() failed */
- g_free(rec);
- cmd_return_error(CMDERR_ERRNO);
- }
-
- rec->id = process_get_new_id();
- rec->target = g_strdup(target);
- rec->target_server = target_server == NULL ? NULL :
- g_strdup(target_server->tag);
- rec->target_win = active_win;
- rec->target_channel = target_channel;
- rec->target_nick = target_nick;
- rec->args = g_strdup(args);
- rec->notice = notice;
- rec->silent = g_hash_table_lookup(optlist, "-") != NULL;
- rec->quiet = g_hash_table_lookup(optlist, "quiet") != NULL;
- rec->name = g_strdup(g_hash_table_lookup(optlist, "name"));
-
- level = g_hash_table_lookup(optlist, "level");
- rec->level = level == NULL ? MSGLEVEL_CLIENTCRAP : level2bits(level);
-
- rec->read_tag = g_input_add(rec->in, G_INPUT_READ,
- (GInputFunction) sig_exec_input_reader,
- rec);
- processes = g_slist_append(processes, rec);
-
- if (rec->target == NULL && interactive)
- rec->target_item = exec_wi_create(active_win, rec);
-
- signal_emit("exec new", 1, rec);
-}
-
-/* SYNTAX: EXEC [-] [-nosh] [-out | -msg <target> | -notice <target>]
- [-name <name>] <cmd line>
- EXEC -out | -window | -msg <target> | -notice <target> |
- -close | -<signal> <id>
- EXEC -in <id> <text to send to process> */
-static void cmd_exec(const char *data, SERVER_REC *server, WI_ITEM_REC *item)
-{
- GHashTable *optlist;
- char *args;
- void *free_arg;
-
- g_return_if_fail(data != NULL);
-
- if (cmd_get_params(data, &free_arg, 1 | PARAM_FLAG_OPTIONS |
- PARAM_FLAG_UNKNOWN_OPTIONS | PARAM_FLAG_GETREST,
- "exec", &optlist, &args)) {
- handle_exec(args, optlist, server, item);
- cmd_params_free(free_arg);
- }
-}
-
-static void sig_pidwait(void *pid, void *statusp)
-{
- PROCESS_REC *rec;
- char *str;
- int status = GPOINTER_TO_INT(statusp);
-
- rec = process_find_pid(GPOINTER_TO_INT(pid));
- if (rec == NULL) return;
-
- /* process exited - print the last line if
- there wasn't a newline at end. */
- if (line_split("\n", 1, &str, &rec->databuf) > 0 && *str != '\0')
- signal_emit_id(signal_exec_input, 2, rec, str);
-
- if (!rec->silent) {
- if (WIFSIGNALED(status)) {
- status = WTERMSIG(status);
- printtext(NULL, NULL, MSGLEVEL_CLIENTNOTICE,
- "process %d (%s) terminated with signal %d (%s)",
- rec->id, rec->args,
- status, g_strsignal(status));
- } else {
- status = WIFEXITED(status) ? WEXITSTATUS(status) : -1;
- printtext(NULL, NULL, MSGLEVEL_CLIENTNOTICE,
- "process %d (%s) terminated with return code %d",
- rec->id, rec->args, status);
- }
- }
- process_destroy(rec, status);
-}
-
-static void sig_exec_input(PROCESS_REC *rec, const char *text)
-{
- WI_ITEM_REC *item;
- SERVER_REC *server;
- char *str;
-
- if (rec->quiet)
- return;
-
- item = NULL;
- server = NULL;
-
- if (rec->target != NULL) {
- if (rec->target_server != NULL) {
- server = server_find_tag(rec->target_server);
- if (server == NULL) {
- /* disconnected - target is lost */
- return;
- }
- item = NULL;
- } else {
- item = window_item_find(NULL, rec->target);
- server = item != NULL ? item->server :
- active_win->active_server;
- }
-
- str = g_strconcat(rec->target_nick ? "-nick " :
- rec->target_channel ? "-channel " : "",
- rec->target, " ", text, NULL);
- signal_emit(rec->notice ? "command notice" : "command msg",
- 3, str, server, item);
- g_free(str);
- } else if (rec->target_item != NULL) {
- printtext(NULL, rec->target_item->visible_name,
- rec->level, "%s", text);
- } else {
- printtext_window(rec->target_win, rec->level, "%s", text);
- }
-}
-
-static void sig_window_destroyed(WINDOW_REC *window)
-{
- GSList *tmp;
-
- /* window is being closed, if there's any /exec targets for it,
- change them to active window. */
- for (tmp = processes; tmp != NULL; tmp = tmp->next) {
- PROCESS_REC *rec = tmp->data;
-
- if (rec->target_win == window)
- rec->target_win = active_win;
- }
-}
-
-static void event_text(const char *data, SERVER_REC *server, EXEC_WI_REC *item)
-{
- if (!IS_EXEC_WI(item))
- return;
-
- net_sendbuffer_send(item->process->out, data, strlen(data));
- net_sendbuffer_send(item->process->out, "\n", 1);
- signal_stop();
-}
-
-void fe_exec_init(void)
-{
- command_bind("exec", NULL, (SIGNAL_FUNC) cmd_exec);
- command_set_options("exec", "!- interactive nosh +name out +msg +notice +in window close +level quiet");
-
- signal_exec_input = signal_get_uniq_id("exec input");
- signal_add("pidwait", (SIGNAL_FUNC) sig_pidwait);
- signal_add("exec input", (SIGNAL_FUNC) sig_exec_input);
- signal_add("window destroyed", (SIGNAL_FUNC) sig_window_destroyed);
- signal_add_first("send text", (SIGNAL_FUNC) event_text);
-}
-
-void fe_exec_deinit(void)
-{
- if (processes != NULL) {
- processes_killall(SIGTERM);
- sleep(1);
- processes_killall(SIGKILL);
-
- while (processes != NULL)
- process_destroy(processes->data, -1);
- }
-
- command_unbind("exec", (SIGNAL_FUNC) cmd_exec);
-
- signal_remove("pidwait", (SIGNAL_FUNC) sig_pidwait);
- signal_remove("exec input", (SIGNAL_FUNC) sig_exec_input);
- signal_remove("window destroyed", (SIGNAL_FUNC) sig_window_destroyed);
- signal_remove("send text", (SIGNAL_FUNC) event_text);
-}
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