1 /* $OpenBSD: cmd-run-shell.c,v 1.53 2018/05/24 09:42:49 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->data; 61 struct window_pane *wp = NULL; 62 struct cmd_find_state fs; 63 64 if (cdata->wp_id != -1) 65 wp = window_pane_find_by_id(cdata->wp_id); 66 if (wp == NULL) { 67 if (cdata->item != NULL) { 68 cmdq_print(cdata->item, "%s", msg); 69 return; 70 } 71 if (cmd_find_from_nothing(&fs, 0) != 0) 72 return; 73 wp = fs.wp; 74 if (wp == NULL) 75 return; 76 } 77 78 if (window_pane_set_mode(wp, &window_copy_mode, NULL, NULL) == 0) 79 window_copy_init_for_output(wp); 80 if (wp->mode == &window_copy_mode) 81 window_copy_add(wp, "%s", msg); 82 } 83 84 static enum cmd_retval 85 cmd_run_shell_exec(struct cmd *self, struct cmdq_item *item) 86 { 87 struct args *args = self->args; 88 struct cmd_run_shell_data *cdata; 89 struct client *c = cmd_find_client(item, NULL, 1); 90 struct session *s = item->target.s; 91 struct winlink *wl = item->target.wl; 92 struct window_pane *wp = item->target.wp; 93 94 cdata = xcalloc(1, sizeof *cdata); 95 cdata->cmd = format_single(item, args->argv[0], c, s, wl, wp); 96 97 if (args_has(args, 't') && wp != NULL) 98 cdata->wp_id = wp->id; 99 else 100 cdata->wp_id = -1; 101 102 if (!args_has(args, 'b')) 103 cdata->item = item; 104 105 job_run(cdata->cmd, s, server_client_get_cwd(item->client, s), NULL, 106 cmd_run_shell_callback, cmd_run_shell_free, cdata, 0); 107 108 if (args_has(args, 'b')) 109 return (CMD_RETURN_NORMAL); 110 return (CMD_RETURN_WAIT); 111 } 112 113 static void 114 cmd_run_shell_callback(struct job *job) 115 { 116 struct cmd_run_shell_data *cdata = job->data; 117 char *cmd = cdata->cmd, *msg, *line; 118 size_t size; 119 int retcode; 120 121 do { 122 if ((line = evbuffer_readline(job->event->input)) != NULL) { 123 cmd_run_shell_print(job, line); 124 free(line); 125 } 126 } while (line != NULL); 127 128 size = EVBUFFER_LENGTH(job->event->input); 129 if (size != 0) { 130 line = xmalloc(size + 1); 131 memcpy(line, EVBUFFER_DATA(job->event->input), size); 132 line[size] = '\0'; 133 134 cmd_run_shell_print(job, line); 135 136 free(line); 137 } 138 139 msg = NULL; 140 if (WIFEXITED(job->status)) { 141 if ((retcode = WEXITSTATUS(job->status)) != 0) 142 xasprintf(&msg, "'%s' returned %d", cmd, retcode); 143 } else if (WIFSIGNALED(job->status)) { 144 retcode = WTERMSIG(job->status); 145 xasprintf(&msg, "'%s' terminated by signal %d", cmd, retcode); 146 } 147 if (msg != NULL) 148 cmd_run_shell_print(job, msg); 149 free(msg); 150 151 if (cdata->item != NULL) 152 cdata->item->flags &= ~CMDQ_WAITING; 153 } 154 155 static void 156 cmd_run_shell_free(void *data) 157 { 158 struct cmd_run_shell_data *cdata = data; 159 160 free(cdata->cmd); 161 free(cdata); 162 } 163