Adding upstream version 1.4.5.upstream/1.4.5upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 682 insertions, 0 deletions

diff --git a/src/fe-common/core/fe-exec.c b/src/fe-common/core/fe-exec.c
new file mode 100644
index 0000000..0e929ba
--- /dev/null
+++ b/src/fe-common/core/fe-exec.c
@@ -0,0 +1,682 @@
+/*
+ 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.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "module.h"
+#include <irssi/src/core/modules.h>
+#include <irssi/src/core/signals.h>
+#include <irssi/src/core/commands.h>
+#include <irssi/src/core/pidwait.h>
+#include <irssi/src/core/line-split.h>
+#include <irssi/src/core/network.h>
+#include <irssi/src/core/net-sendbuffer.h>
+#include <irssi/src/core/misc.h>
+#include <irssi/src/core/levels.h>
+
+#include <irssi/src/core/servers.h>
+#include <irssi/src/core/channels.h>
+#include <irssi/src/core/queries.h>
+
+#include <irssi/src/fe-common/core/printtext.h>
+#include <irssi/src/fe-common/core/fe-exec.h>
+#include <irssi/src/fe-common/core/fe-windows.h>
+#include <irssi/src/fe-common/core/window-items.h>
+
+#include <signal.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+#include <unistd.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 && g_strcmp0(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_shutdown(rec->in, TRUE, NULL);
+        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;
+	int kill_ret;
+
+	for (tmp = processes; tmp != NULL; tmp = tmp->next) {
+		PROCESS_REC *rec = tmp->data;
+
+		kill_ret = kill(-rec->pid, signum);
+		if (kill_ret != 0)
+		        printtext(NULL, NULL, MSGLEVEL_CLIENTERROR,
+		                  "Error sending signal %d to pid %d: %s",
+		                  signum, rec->pid, g_strerror(errno));
+	}
+}
+
+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_ascii_strcasecmp(name, "hup") == 0)
+                return SIGHUP;
+	if (g_ascii_strcasecmp(name, "int") == 0)
+                return SIGINT;
+	if (g_ascii_strcasecmp(name, "term") == 0)
+                return SIGTERM;
+	if (g_ascii_strcasecmp(name, "kill") == 0)
+                return SIGKILL;
+	if (g_ascii_strcasecmp(name, "usr1") == 0)
+                return SIGUSR1;
+	if (g_ascii_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)
+{
+	GList *list;
+	char *signame;
+        int signum;
+
+	/* get all the options, then remove the known ones. there should
+	   be only one left - the signal */
+	list = optlist_remove_known(cmd, optlist);
+
+	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_list_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] = { FHS_PREFIX "/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 = i_io_channel_new(in[1]);
+
+		rec->in = i_io_channel_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();
+
+#ifndef __ANDROID__
+	if (setuid(getuid()) != 0)
+		_exit(EXIT_FAILURE);
+
+	if (setgid(getgid()) != 0)
+		_exit(EXIT_FAILURE);
+#endif
+
+	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: " FHS_PREFIX "/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;
+        int recvlen;
+	int ret;
+
+	g_return_if_fail(rec != NULL);
+
+	recvlen = net_receive(rec->in, tmpbuf, sizeof(tmpbuf));
+	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, kill_ret;
+
+	/* 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 group */
+                kill_ret = kill(-rec->pid, signum);
+                if (kill_ret != 0)
+                        printtext(NULL, NULL, MSGLEVEL_CLIENTERROR,
+                                  "Error sending signal %d to pid %d: %s",
+                                  signum, rec->pid, g_strerror(errno));
+                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, NULL);
+
+	rec->read_tag =
+	    i_input_add(rec->in, I_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 == '\0' ? " " : 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);
+}