cmd-run-shell.c

   1 /* $OpenBSD$ */
   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 <ctype.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include "tmux.h"
  28
  29 /*
  30  * Runs a command without a window.
  31  */
  32
  33 static enum args_parse_type     cmd_run_shell_args_parse(struct args *, u_int,
  34                                     char **);
  35 static enum cmd_retval          cmd_run_shell_exec(struct cmd *,
  36                                     struct cmdq_item *);
  37
  38 static void     cmd_run_shell_timer(int, short, void *);
  39 static void     cmd_run_shell_callback(struct job *);
  40 static void     cmd_run_shell_free(void *);
  41 static void     cmd_run_shell_print(struct job *, const char *);
  42
  43 const struct cmd_entry cmd_run_shell_entry = {
  44         .name = "run-shell",
  45         .alias = "run",
  46
  47         .args = { "bd:Ct:", 0, 1, cmd_run_shell_args_parse },
  48         .usage = "[-bC] [-d delay] " CMD_TARGET_PANE_USAGE " [shell-command]",
  49
  50         .target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL },
  51
  52         .flags = 0,
  53         .exec = cmd_run_shell_exec
  54 };
  55
  56 struct cmd_run_shell_data {
  57         struct client                   *client;
  58         char                            *cmd;
  59         struct args_command_state       *state;
  60         char                            *cwd;
  61         struct cmdq_item                *item;
  62         struct session                  *s;
  63         int                              wp_id;
  64         struct event                     timer;
  65         int                              flags;
  66 };
  67
  68 static enum args_parse_type
  69 cmd_run_shell_args_parse(struct args *args, __unused u_int idx,
  70     __unused char **cause)
  71 {
  72         if (args_has(args, 'C'))
  73                 return (ARGS_PARSE_COMMANDS_OR_STRING);
  74         return (ARGS_PARSE_STRING);
  75 }
  76
  77 static void
  78 cmd_run_shell_print(struct job *job, const char *msg)
  79 {
  80         struct cmd_run_shell_data       *cdata = job_get_data(job);
  81         struct window_pane              *wp = NULL;
  82         struct cmd_find_state            fs;
  83         struct window_mode_entry        *wme;
  84
  85         if (cdata->wp_id != -1)
  86                 wp = window_pane_find_by_id(cdata->wp_id);
  87         if (wp == NULL) {
  88                 if (cdata->item != NULL) {
  89                         cmdq_print(cdata->item, "%s", msg);
  90                         return;
  91                 }
  92                 if (cmd_find_from_nothing(&fs, 0) != 0)
  93                         return;
  94                 wp = fs.wp;
  95                 if (wp == NULL)
  96                         return;
  97         }
  98
  99         wme = TAILQ_FIRST(&wp->modes);
 100         if (wme == NULL || wme->mode != &window_view_mode)
 101                 window_pane_set_mode(wp, NULL, &window_view_mode, NULL, NULL);
 102         window_copy_add(wp, "%s", msg);
 103 }
 104
 105 static enum cmd_retval
 106 cmd_run_shell_exec(struct cmd *self, struct cmdq_item *item)
 107 {
 108         struct args                     *args = cmd_get_args(self);
 109         struct cmd_find_state           *target = cmdq_get_target(item);
 110         struct cmd_run_shell_data       *cdata;
 111         struct client                   *tc = cmdq_get_target_client(item);
 112         struct session                  *s = target->s;
 113         struct window_pane              *wp = target->wp;
 114         const char                      *delay, *cmd;
 115         double                           d;
 116         struct timeval                   tv;
 117         char                            *end;
 118         int                              wait = !args_has(args, 'b');
 119
 120         if ((delay = args_get(args, 'd')) != NULL) {
 121                 d = strtod(delay, &end);
 122                 if (*end != '\0') {
 123                         cmdq_error(item, "invalid delay time: %s", delay);
 124                         return (CMD_RETURN_ERROR);
 125                 }
 126         } else if (args_count(args) == 0)
 127                 return (CMD_RETURN_NORMAL);
 128
 129         cdata = xcalloc(1, sizeof *cdata);
 130         if (!args_has(args, 'C')) {
 131                 cmd = args_string(args, 0);
 132                 if (cmd != NULL)
 133                         cdata->cmd = format_single_from_target(item, cmd);
 134         } else {
 135                 cdata->state = args_make_commands_prepare(self, item, 0, NULL,
 136                     wait, 1);
 137         }
 138
 139         if (args_has(args, 't') && wp != NULL)
 140                 cdata->wp_id = wp->id;
 141         else
 142                 cdata->wp_id = -1;
 143
 144         if (wait) {
 145                 cdata->client = cmdq_get_client(item);
 146                 cdata->item = item;
 147         } else {
 148                 cdata->client = tc;
 149                 cdata->flags |= JOB_NOWAIT;
 150         }
 151         if (cdata->client != NULL)
 152                 cdata->client->references++;
 153
 154         cdata->cwd = xstrdup(server_client_get_cwd(cmdq_get_client(item), s));
 155
 156         cdata->s = s;
 157         if (s != NULL)
 158                 session_add_ref(s, __func__);
 159
 160         evtimer_set(&cdata->timer, cmd_run_shell_timer, cdata);
 161         if (delay != NULL) {
 162                 timerclear(&tv);
 163                 tv.tv_sec = (time_t)d;
 164                 tv.tv_usec = (d - (double)tv.tv_sec) * 1000000U;
 165                 evtimer_add(&cdata->timer, &tv);
 166         } else
 167                 event_active(&cdata->timer, EV_TIMEOUT, 1);
 168
 169         if (!wait)
 170                 return (CMD_RETURN_NORMAL);
 171         return (CMD_RETURN_WAIT);
 172 }
 173
 174 static void
 175 cmd_run_shell_timer(__unused int fd, __unused short events, void* arg)
 176 {
 177         struct cmd_run_shell_data       *cdata = arg;
 178         struct client                   *c = cdata->client;
 179         const char                      *cmd = cdata->cmd;
 180         struct cmdq_item                *item = cdata->item, *new_item;
 181         struct cmd_list                 *cmdlist;
 182         char                            *error;
 183
 184         if (cdata->state == NULL) {
 185                 if (cmd == NULL) {
 186                         if (cdata->item != NULL)
 187                                 cmdq_continue(cdata->item);
 188                         cmd_run_shell_free(cdata);
 189                         return;
 190                 }
 191                 if (job_run(cmd, 0, NULL, NULL, cdata->s, cdata->cwd, NULL,
 192                     cmd_run_shell_callback, cmd_run_shell_free, cdata,
 193                     cdata->flags, -1, -1) == NULL)
 194                         cmd_run_shell_free(cdata);
 195                 return;
 196         }
 197
 198         cmdlist = args_make_commands(cdata->state, 0, NULL, &error);
 199         if (cmdlist == NULL) {
 200                 if (cdata->item == NULL) {
 201                         *error = toupper((u_char)*error);
 202                         status_message_set(c, -1, 1, 0, "%s", error);
 203                 } else
 204                         cmdq_error(cdata->item, "%s", error);
 205                 free(error);
 206         } else if (item == NULL) {
 207                 new_item = cmdq_get_command(cmdlist, NULL);
 208                 cmdq_append(c, new_item);
 209         } else {
 210                 new_item = cmdq_get_command(cmdlist, cmdq_get_state(item));
 211                 cmdq_insert_after(item, new_item);
 212         }
 213
 214         if (cdata->item != NULL)
 215                 cmdq_continue(cdata->item);
 216         cmd_run_shell_free(cdata);
 217 }
 218
 219 static void
 220 cmd_run_shell_callback(struct job *job)
 221 {
 222         struct cmd_run_shell_data       *cdata = job_get_data(job);
 223         struct bufferevent              *event = job_get_event(job);
 224         struct cmdq_item                *item = cdata->item;
 225         char                            *cmd = cdata->cmd, *msg = NULL, *line;
 226         size_t                           size;
 227         int                              retcode, status;
 228
 229         do {
 230                 if ((line = evbuffer_readline(event->input)) != NULL) {
 231                         cmd_run_shell_print(job, line);
 232                         free(line);
 233                 }
 234         } while (line != NULL);
 235
 236         size = EVBUFFER_LENGTH(event->input);
 237         if (size != 0) {
 238                 line = xmalloc(size + 1);
 239                 memcpy(line, EVBUFFER_DATA(event->input), size);
 240                 line[size] = '\0';
 241
 242                 cmd_run_shell_print(job, line);
 243
 244                 free(line);
 245         }
 246
 247         status = job_get_status(job);
 248         if (WIFEXITED(status)) {
 249                 if ((retcode = WEXITSTATUS(status)) != 0)
 250                         xasprintf(&msg, "'%s' returned %d", cmd, retcode);
 251         } else if (WIFSIGNALED(status)) {
 252                 retcode = WTERMSIG(status);
 253                 xasprintf(&msg, "'%s' terminated by signal %d", cmd, retcode);
 254                 retcode += 128;
 255         } else
 256                 retcode = 0;
 257         if (msg != NULL)
 258                 cmd_run_shell_print(job, msg);
 259         free(msg);
 260
 261         if (item != NULL) {
 262                 if (cmdq_get_client(item) != NULL &&
 263                     cmdq_get_client(item)->session == NULL)
 264                         cmdq_get_client(item)->retval = retcode;
 265                 cmdq_continue(item);
 266         }
 267 }
 268
 269 static void
 270 cmd_run_shell_free(void *data)
 271 {
 272         struct cmd_run_shell_data       *cdata = data;
 273
 274         evtimer_del(&cdata->timer);
 275         if (cdata->s != NULL)
 276                 session_remove_ref(cdata->s, __func__);
 277         if (cdata->client != NULL)
 278                 server_client_unref(cdata->client);
 279         if (cdata->state != NULL)
 280                 args_make_commands_free(cdata->state);
 281         free(cdata->cwd);
 282         free(cdata->cmd);
 283         free(cdata);
 284 }