1 /* $OpenBSD: cmd-run-shell.c,v 1.59 2019/06/18 11:08:42 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_callback(struct job *); 35 static void cmd_run_shell_free(void *); 36 static void cmd_run_shell_print(struct job *, const char *); 37 38 const struct cmd_entry cmd_run_shell_entry = { 39 .name = "run-shell", 40 .alias = "run", 41 42 .args = { "bt:", 1, 1 }, 43 .usage = "[-b] " CMD_TARGET_PANE_USAGE " shell-command", 44 45 .target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL }, 46 47 .flags = 0, 48 .exec = cmd_run_shell_exec 49 }; 50 51 struct cmd_run_shell_data { 52 char *cmd; 53 struct cmdq_item *item; 54 int wp_id; 55 }; 56 57 static void 58 cmd_run_shell_print(struct job *job, const char *msg) 59 { 60 struct cmd_run_shell_data *cdata = job_get_data(job); 61 struct window_pane *wp = NULL; 62 struct cmd_find_state fs; 63 struct window_mode_entry *wme; 64 65 if (cdata->wp_id != -1) 66 wp = window_pane_find_by_id(cdata->wp_id); 67 if (wp == NULL) { 68 if (cdata->item != NULL) { 69 cmdq_print(cdata->item, "%s", msg); 70 return; 71 } 72 if (cmd_find_from_nothing(&fs, 0) != 0) 73 return; 74 wp = fs.wp; 75 if (wp == NULL) 76 return; 77 } 78 79 wme = TAILQ_FIRST(&wp->modes); 80 if (wme == NULL || wme->mode != &window_view_mode) 81 window_pane_set_mode(wp, &window_view_mode, NULL, NULL); 82 window_copy_add(wp, "%s", msg); 83 } 84 85 static enum cmd_retval 86 cmd_run_shell_exec(struct cmd *self, struct cmdq_item *item) 87 { 88 struct args *args = self->args; 89 struct cmd_run_shell_data *cdata; 90 struct client *c = cmd_find_client(item, NULL, 1); 91 struct session *s = item->target.s; 92 struct winlink *wl = item->target.wl; 93 struct window_pane *wp = item->target.wp; 94 95 cdata = xcalloc(1, sizeof *cdata); 96 cdata->cmd = format_single(item, args->argv[0], c, s, wl, wp); 97 98 if (args_has(args, 't') && wp != NULL) 99 cdata->wp_id = wp->id; 100 else 101 cdata->wp_id = -1; 102 103 if (!args_has(args, 'b')) 104 cdata->item = item; 105 106 if (job_run(cdata->cmd, s, server_client_get_cwd(item->client, s), NULL, 107 cmd_run_shell_callback, cmd_run_shell_free, cdata, 0) == NULL) { 108 cmdq_error(item, "failed to run command: %s", cdata->cmd); 109 free(cdata); 110 return (CMD_RETURN_ERROR); 111 } 112 113 if (args_has(args, 'b')) 114 return (CMD_RETURN_NORMAL); 115 return (CMD_RETURN_WAIT); 116 } 117 118 static void 119 cmd_run_shell_callback(struct job *job) 120 { 121 struct cmd_run_shell_data *cdata = job_get_data(job); 122 struct bufferevent *event = job_get_event(job); 123 char *cmd = cdata->cmd, *msg = NULL, *line; 124 size_t size; 125 int retcode, status; 126 127 do { 128 if ((line = evbuffer_readline(event->input)) != NULL) { 129 cmd_run_shell_print(job, line); 130 free(line); 131 } 132 } while (line != NULL); 133 134 size = EVBUFFER_LENGTH(event->input); 135 if (size != 0) { 136 line = xmalloc(size + 1); 137 memcpy(line, EVBUFFER_DATA(event->input), size); 138 line[size] = '\0'; 139 140 cmd_run_shell_print(job, line); 141 142 free(line); 143 } 144 145 status = job_get_status(job); 146 if (WIFEXITED(status)) { 147 if ((retcode = WEXITSTATUS(status)) != 0) 148 xasprintf(&msg, "'%s' returned %d", cmd, retcode); 149 } else if (WIFSIGNALED(status)) { 150 retcode = WTERMSIG(status); 151 xasprintf(&msg, "'%s' terminated by signal %d", cmd, retcode); 152 } 153 if (msg != NULL) 154 cmd_run_shell_print(job, msg); 155 free(msg); 156 157 if (cdata->item != NULL) 158 cmdq_continue(cdata->item); 159 } 160 161 static void 162 cmd_run_shell_free(void *data) 163 { 164 struct cmd_run_shell_data *cdata = data; 165 166 free(cdata->cmd); 167 free(cdata); 168 } 169