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 <stdlib.h>
  24 #include <string.h>
  25
  26 #include "tmux.h"
  27
  28 /*
  29  * Runs a command without a window.
  30  */
  31
  32 enum cmd_retval  cmd_run_shell_exec(struct cmd *, struct cmd_q *);
  33
  34 void    cmd_run_shell_callback(struct job *);
  35 void    cmd_run_shell_free(void *);
  36 void    cmd_run_shell_print(struct job *, const char *);
  37
  38 const struct cmd_entry cmd_run_shell_entry = {
  39         "run-shell", "run",
  40         "bt:", 1, 1,
  41         "[-b] " CMD_TARGET_PANE_USAGE " shell-command",
  42         0,
  43         NULL,
  44         cmd_run_shell_exec
  45 };
  46
  47 struct cmd_run_shell_data {
  48         char            *cmd;
  49         struct cmd_q    *cmdq;
  50         int              bflag;
  51         int              wp_id;
  52 };
  53
  54 void
  55 cmd_run_shell_print(struct job *job, const char *msg)
  56 {
  57         struct cmd_run_shell_data       *cdata = job->data;
  58         struct window_pane              *wp = NULL;
  59
  60         if (cdata->wp_id != -1)
  61                 wp = window_pane_find_by_id(cdata->wp_id);
  62         if (wp == NULL) {
  63                 cmdq_print(cdata->cmdq, "%s", msg);
  64                 return;
  65         }
  66
  67         if (window_pane_set_mode(wp, &window_copy_mode) == 0)
  68                 window_copy_init_for_output(wp);
  69         if (wp->mode == &window_copy_mode)
  70                 window_copy_add(wp, "%s", msg);
  71 }
  72
  73 enum cmd_retval
  74 cmd_run_shell_exec(struct cmd *self, struct cmd_q *cmdq)
  75 {
  76         struct args                     *args = self->args;
  77         struct cmd_run_shell_data       *cdata;
  78         char                            *shellcmd;
  79         struct client                   *c;
  80         struct session                  *s = NULL;
  81         struct winlink                  *wl = NULL;
  82         struct window_pane              *wp = NULL;
  83         struct format_tree              *ft;
  84
  85         if (args_has(args, 't'))
  86                 wl = cmd_find_pane(cmdq, args_get(args, 't'), &s, &wp);
  87         else {
  88                 c = cmd_find_client(cmdq, NULL, 1);
  89                 if (c != NULL && c->session != NULL) {
  90                         s = c->session;
  91                         wl = s->curw;
  92                         wp = wl->window->active;
  93                 }
  94         }
  95
  96         ft = format_create();
  97         if (s != NULL)
  98                 format_session(ft, s);
  99         if (s != NULL && wl != NULL)
 100                 format_winlink(ft, s, wl);
 101         if (wp != NULL)
 102                 format_window_pane(ft, wp);
 103         shellcmd = format_expand(ft, args->argv[0]);
 104         format_free(ft);
 105
 106         cdata = xmalloc(sizeof *cdata);
 107         cdata->cmd = shellcmd;
 108         cdata->bflag = args_has(args, 'b');
 109         cdata->wp_id = wp != NULL ? (int) wp->id : -1;
 110
 111         cdata->cmdq = cmdq;
 112         cmdq->references++;
 113
 114         job_run(shellcmd, s, cmd_run_shell_callback, cmd_run_shell_free, cdata);
 115
 116         if (cdata->bflag)
 117                 return (CMD_RETURN_NORMAL);
 118         return (CMD_RETURN_WAIT);
 119 }
 120
 121 void
 122 cmd_run_shell_callback(struct job *job)
 123 {
 124         struct cmd_run_shell_data       *cdata = job->data;
 125         struct cmd_q                    *cmdq = cdata->cmdq;
 126         char                            *cmd, *msg, *line;
 127         size_t                           size;
 128         int                              retcode;
 129         u_int                            lines;
 130
 131         if (cmdq->dead)
 132                 return;
 133         cmd = cdata->cmd;
 134
 135         lines = 0;
 136         do {
 137                 if ((line = evbuffer_readline(job->event->input)) != NULL) {
 138                         cmd_run_shell_print(job, line);
 139                         free(line);
 140                         lines++;
 141                 }
 142         } while (line != NULL);
 143
 144         size = EVBUFFER_LENGTH(job->event->input);
 145         if (size != 0) {
 146                 line = xmalloc(size + 1);
 147                 memcpy(line, EVBUFFER_DATA(job->event->input), size);
 148                 line[size] = '\0';
 149
 150                 cmd_run_shell_print(job, line);
 151                 lines++;
 152
 153                 free(line);
 154         }
 155
 156         msg = NULL;
 157         if (WIFEXITED(job->status)) {
 158                 if ((retcode = WEXITSTATUS(job->status)) != 0)
 159                         xasprintf(&msg, "'%s' returned %d", cmd, retcode);
 160         } else if (WIFSIGNALED(job->status)) {
 161                 retcode = WTERMSIG(job->status);
 162                 xasprintf(&msg, "'%s' terminated by signal %d", cmd, retcode);
 163         }
 164         if (msg != NULL) {
 165                 if (lines == 0)
 166                         cmdq_info(cmdq, "%s", msg);
 167                 else
 168                         cmd_run_shell_print(job, msg);
 169                 free(msg);
 170         }
 171 }
 172
 173 void
 174 cmd_run_shell_free(void *data)
 175 {
 176         struct cmd_run_shell_data       *cdata = data;
 177         struct cmd_q                    *cmdq = cdata->cmdq;
 178
 179         if (!cmdq_free(cmdq) && !cdata->bflag)
 180                 cmdq_continue(cmdq);
 181
 182         free(cdata->cmd);
 183         free(cdata);
 184 }