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/* $OpenBSD: cmd-run-shell.c,v 1.77 2021/08/23 12:33:55 nicm Exp $ */
/*
* Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
* Copyright (c) 2009 Nicholas Marriott <nicm@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/wait.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "tmux.h"
/*
* Runs a command without a window.
*/
static enum cmd_retval cmd_run_shell_exec(struct cmd *, struct cmdq_item *);
static void cmd_run_shell_timer(int, short, void *);
static void cmd_run_shell_callback(struct job *);
static void cmd_run_shell_free(void *);
static void cmd_run_shell_print(struct job *, const char *);
const struct cmd_entry cmd_run_shell_entry = {
.name = "run-shell",
.alias = "run",
.args = { "bd:Ct:", 0, 1, NULL },
.usage = "[-bC] [-d delay] " CMD_TARGET_PANE_USAGE " [shell-command]",
.target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL },
.flags = 0,
.exec = cmd_run_shell_exec
};
struct cmd_run_shell_data {
struct client *client;
char *cmd;
struct cmd_list *cmdlist;
char *cwd;
struct cmdq_item *item;
struct session *s;
int wp_id;
struct event timer;
int flags;
};
static void
cmd_run_shell_print(struct job *job, const char *msg)
{
struct cmd_run_shell_data *cdata = job_get_data(job);
struct window_pane *wp = NULL;
struct cmd_find_state fs;
struct window_mode_entry *wme;
if (cdata->wp_id != -1)
wp = window_pane_find_by_id(cdata->wp_id);
if (wp == NULL) {
if (cdata->item != NULL) {
cmdq_print(cdata->item, "%s", msg);
return;
}
if (cmd_find_from_nothing(&fs, 0) != 0)
return;
wp = fs.wp;
if (wp == NULL)
return;
}
wme = TAILQ_FIRST(&wp->modes);
if (wme == NULL || wme->mode != &window_view_mode)
window_pane_set_mode(wp, NULL, &window_view_mode, NULL, NULL);
window_copy_add(wp, "%s", msg);
}
static enum cmd_retval
cmd_run_shell_exec(struct cmd *self, struct cmdq_item *item)
{
struct args *args = cmd_get_args(self);
struct cmd_find_state *target = cmdq_get_target(item);
struct cmd_run_shell_data *cdata;
struct client *tc = cmdq_get_target_client(item);
struct session *s = target->s;
struct window_pane *wp = target->wp;
const char *delay, *cmd;
double d;
struct timeval tv;
char *end;
int wait = !args_has(args, 'b');
if ((delay = args_get(args, 'd')) != NULL) {
d = strtod(delay, &end);
if (*end != '\0') {
cmdq_error(item, "invalid delay time: %s", delay);
return (CMD_RETURN_ERROR);
}
} else if (args_count(args) == 0)
return (CMD_RETURN_NORMAL);
cdata = xcalloc(1, sizeof *cdata);
if (!args_has(args, 'C')) {
cmd = args_string(args, 0);
if (cmd != NULL)
cdata->cmd = format_single_from_target(item, cmd);
} else {
cdata->cmdlist = args_make_commands_now(self, item, 0);
if (cdata->cmdlist == NULL)
return (CMD_RETURN_ERROR);
}
if (args_has(args, 't') && wp != NULL)
cdata->wp_id = wp->id;
else
cdata->wp_id = -1;
if (wait) {
cdata->client = cmdq_get_client(item);
cdata->item = item;
} else {
cdata->client = tc;
cdata->flags |= JOB_NOWAIT;
}
if (cdata->client != NULL)
cdata->client->references++;
cdata->cwd = xstrdup(server_client_get_cwd(cmdq_get_client(item), s));
cdata->s = s;
if (s != NULL)
session_add_ref(s, __func__);
evtimer_set(&cdata->timer, cmd_run_shell_timer, cdata);
if (delay != NULL) {
timerclear(&tv);
tv.tv_sec = (time_t)d;
tv.tv_usec = (d - (double)tv.tv_sec) * 1000000U;
evtimer_add(&cdata->timer, &tv);
} else
event_active(&cdata->timer, EV_TIMEOUT, 1);
if (!wait)
return (CMD_RETURN_NORMAL);
return (CMD_RETURN_WAIT);
}
static void
cmd_run_shell_timer(__unused int fd, __unused short events, void* arg)
{
struct cmd_run_shell_data *cdata = arg;
struct client *c = cdata->client;
const char *cmd = cdata->cmd;
struct cmdq_item *item = cdata->item, *new_item;
if (cdata->cmdlist == NULL && cmd != NULL) {
if (job_run(cmd, 0, NULL, cdata->s, cdata->cwd, NULL,
cmd_run_shell_callback, cmd_run_shell_free, cdata,
cdata->flags, -1, -1) == NULL)
cmd_run_shell_free(cdata);
return;
}
if (cdata->cmdlist != NULL) {
if (item == NULL) {
new_item = cmdq_get_command(cdata->cmdlist, NULL);
cmdq_append(c, new_item);
} else {
new_item = cmdq_get_command(cdata->cmdlist,
cmdq_get_state(item));
cmdq_insert_after(item, new_item);
}
}
if (cdata->item != NULL)
cmdq_continue(cdata->item);
cmd_run_shell_free(cdata);
}
static void
cmd_run_shell_callback(struct job *job)
{
struct cmd_run_shell_data *cdata = job_get_data(job);
struct bufferevent *event = job_get_event(job);
struct cmdq_item *item = cdata->item;
char *cmd = cdata->cmd, *msg = NULL, *line;
size_t size;
int retcode, status;
do {
if ((line = evbuffer_readline(event->input)) != NULL) {
cmd_run_shell_print(job, line);
free(line);
}
} while (line != NULL);
size = EVBUFFER_LENGTH(event->input);
if (size != 0) {
line = xmalloc(size + 1);
memcpy(line, EVBUFFER_DATA(event->input), size);
line[size] = '\0';
cmd_run_shell_print(job, line);
free(line);
}
status = job_get_status(job);
if (WIFEXITED(status)) {
if ((retcode = WEXITSTATUS(status)) != 0)
xasprintf(&msg, "'%s' returned %d", cmd, retcode);
} else if (WIFSIGNALED(status)) {
retcode = WTERMSIG(status);
xasprintf(&msg, "'%s' terminated by signal %d", cmd, retcode);
retcode += 128;
} else
retcode = 0;
if (msg != NULL)
cmd_run_shell_print(job, msg);
free(msg);
if (item != NULL) {
if (cmdq_get_client(item) != NULL &&
cmdq_get_client(item)->session == NULL)
cmdq_get_client(item)->retval = retcode;
cmdq_continue(item);
}
}
static void
cmd_run_shell_free(void *data)
{
struct cmd_run_shell_data *cdata = data;
evtimer_del(&cdata->timer);
if (cdata->s != NULL)
session_remove_ref(cdata->s, __func__);
if (cdata->client != NULL)
server_client_unref(cdata->client);
if (cdata->cmdlist != NULL)
cmd_list_free(cdata->cmdlist);
free(cdata->cwd);
free(cdata->cmd);
free(cdata);
}
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