1 /* $OpenBSD: cmd-run-shell.c,v 1.65 2020/04/13 08:26:27 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org> 5 * Copyright (c) 2009 Nicholas Marriott <nicm@openbsd.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 16 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 17 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/types.h> 21 #include <sys/wait.h> 22 23 #include <stdlib.h> 24 #include <string.h> 25 26 #include "tmux.h" 27 28 /* 29 * Runs a command without a window. 30 */ 31 32 static enum cmd_retval cmd_run_shell_exec(struct cmd *, struct cmdq_item *); 33 34 static void cmd_run_shell_timer(int, short, void *); 35 static void cmd_run_shell_callback(struct job *); 36 static void cmd_run_shell_free(void *); 37 static void cmd_run_shell_print(struct job *, const char *); 38 39 const struct cmd_entry cmd_run_shell_entry = { 40 .name = "run-shell", 41 .alias = "run", 42 43 .args = { "bd:t:", 0, 1 }, 44 .usage = "[-b] [-d delay] " CMD_TARGET_PANE_USAGE " [shell-command]", 45 46 .target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL }, 47 48 .flags = 0, 49 .exec = cmd_run_shell_exec 50 }; 51 52 struct cmd_run_shell_data { 53 char *cmd; 54 char *cwd; 55 struct cmdq_item *item; 56 struct session *s; 57 int wp_id; 58 struct event timer; 59 }; 60 61 static void 62 cmd_run_shell_print(struct job *job, const char *msg) 63 { 64 struct cmd_run_shell_data *cdata = job_get_data(job); 65 struct window_pane *wp = NULL; 66 struct cmd_find_state fs; 67 struct window_mode_entry *wme; 68 69 if (cdata->wp_id != -1) 70 wp = window_pane_find_by_id(cdata->wp_id); 71 if (wp == NULL) { 72 if (cdata->item != NULL) { 73 cmdq_print(cdata->item, "%s", msg); 74 return; 75 } 76 if (cmd_find_from_nothing(&fs, 0) != 0) 77 return; 78 wp = fs.wp; 79 if (wp == NULL) 80 return; 81 } 82 83 wme = TAILQ_FIRST(&wp->modes); 84 if (wme == NULL || wme->mode != &window_view_mode) 85 window_pane_set_mode(wp, NULL, &window_view_mode, NULL, NULL); 86 window_copy_add(wp, "%s", msg); 87 } 88 89 static enum cmd_retval 90 cmd_run_shell_exec(struct cmd *self, struct cmdq_item *item) 91 { 92 struct args *args = cmd_get_args(self); 93 struct cmd_run_shell_data *cdata; 94 struct client *c = cmd_find_client(item, NULL, 1); 95 struct session *s = item->target.s; 96 struct winlink *wl = item->target.wl; 97 struct window_pane *wp = item->target.wp; 98 const char *delay; 99 double d; 100 struct timeval tv; 101 char *end; 102 103 cdata = xcalloc(1, sizeof *cdata); 104 if (args->argc != 0) 105 cdata->cmd = format_single(item, args->argv[0], c, s, wl, wp); 106 107 if (args_has(args, 't') && wp != NULL) 108 cdata->wp_id = wp->id; 109 else 110 cdata->wp_id = -1; 111 112 if (!args_has(args, 'b')) 113 cdata->item = item; 114 115 cdata->cwd = xstrdup(server_client_get_cwd(item->client, s)); 116 cdata->s = s; 117 if (s != NULL) 118 session_add_ref(s, __func__); 119 120 evtimer_set(&cdata->timer, cmd_run_shell_timer, cdata); 121 122 if ((delay = args_get(args, 'd')) != NULL) { 123 d = strtod(delay, &end); 124 if (*end != '\0') { 125 cmdq_error(item, "invalid delay time: %s", delay); 126 cmd_run_shell_free(cdata); 127 return (CMD_RETURN_ERROR); 128 } 129 timerclear(&tv); 130 tv.tv_sec = (time_t)d; 131 tv.tv_usec = (d - (double)tv.tv_sec) * 1000000U; 132 evtimer_add(&cdata->timer, &tv); 133 } else 134 cmd_run_shell_timer(-1, 0, cdata); 135 136 if (args_has(args, 'b')) 137 return (CMD_RETURN_NORMAL); 138 return (CMD_RETURN_WAIT); 139 } 140 141 static void 142 cmd_run_shell_timer(__unused int fd, __unused short events, void* arg) 143 { 144 struct cmd_run_shell_data *cdata = arg; 145 146 if (cdata->cmd != NULL) { 147 if (job_run(cdata->cmd, cdata->s, cdata->cwd, NULL, 148 cmd_run_shell_callback, cmd_run_shell_free, cdata, 0, -1, 149 -1) == NULL) 150 cmd_run_shell_free(cdata); 151 } else { 152 if (cdata->item != NULL) 153 cmdq_continue(cdata->item); 154 cmd_run_shell_free(cdata); 155 } 156 } 157 158 static void 159 cmd_run_shell_callback(struct job *job) 160 { 161 struct cmd_run_shell_data *cdata = job_get_data(job); 162 struct bufferevent *event = job_get_event(job); 163 struct cmdq_item *item = cdata->item; 164 char *cmd = cdata->cmd, *msg = NULL, *line; 165 size_t size; 166 int retcode, status; 167 168 do { 169 if ((line = evbuffer_readline(event->input)) != NULL) { 170 cmd_run_shell_print(job, line); 171 free(line); 172 } 173 } while (line != NULL); 174 175 size = EVBUFFER_LENGTH(event->input); 176 if (size != 0) { 177 line = xmalloc(size + 1); 178 memcpy(line, EVBUFFER_DATA(event->input), size); 179 line[size] = '\0'; 180 181 cmd_run_shell_print(job, line); 182 183 free(line); 184 } 185 186 status = job_get_status(job); 187 if (WIFEXITED(status)) { 188 if ((retcode = WEXITSTATUS(status)) != 0) 189 xasprintf(&msg, "'%s' returned %d", cmd, retcode); 190 } else if (WIFSIGNALED(status)) { 191 retcode = WTERMSIG(status); 192 xasprintf(&msg, "'%s' terminated by signal %d", cmd, retcode); 193 retcode += 128; 194 } 195 if (msg != NULL) 196 cmd_run_shell_print(job, msg); 197 free(msg); 198 199 if (item != NULL) { 200 if (item->client != NULL && item->client->session == NULL) 201 item->client->retval = retcode; 202 cmdq_continue(item); 203 } 204 } 205 206 static void 207 cmd_run_shell_free(void *data) 208 { 209 struct cmd_run_shell_data *cdata = data; 210 211 evtimer_del(&cdata->timer); 212 if (cdata->s != NULL) 213 session_remove_ref(cdata->s, __func__); 214 free(cdata->cwd); 215 free(cdata->cmd); 216 free(cdata); 217 } 218