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 <string.h>
  24
  25 #include "tmux.h"
  26
  27 /*
  28  * Runs a command without a window.
  29  */
  30
  31 int     cmd_run_shell_exec(struct cmd *, struct cmd_ctx *);
  32
  33 void    cmd_run_shell_callback(struct job *);
  34 void    cmd_run_shell_free(void *);
  35
  36 const struct cmd_entry cmd_run_shell_entry = {
  37         "run-shell", "run",
  38         "command",
  39         CMD_ARG1, "",
  40         cmd_target_init,
  41         cmd_target_parse,
  42         cmd_run_shell_exec,
  43         cmd_target_free,
  44         cmd_target_print
  45 };
  46
  47 struct cmd_run_shell_data {
  48         char            *cmd;
  49         struct cmd_ctx   ctx;
  50 };
  51
  52 int
  53 cmd_run_shell_exec(struct cmd *self, struct cmd_ctx *ctx)
  54 {
  55         struct cmd_target_data          *data = self->data;
  56         struct cmd_run_shell_data       *cdata;
  57         struct job                      *job;
  58
  59         cdata = xmalloc(sizeof *cdata);
  60         cdata->cmd = xstrdup(data->arg);
  61         memcpy(&cdata->ctx, ctx, sizeof cdata->ctx);
  62
  63         if (ctx->cmdclient != NULL)
  64                 ctx->cmdclient->references++;
  65         if (ctx->curclient != NULL)
  66                 ctx->curclient->references++;
  67
  68         job = job_add(NULL, 0, NULL,
  69             data->arg, cmd_run_shell_callback, cmd_run_shell_free, cdata);
  70         job_run(job);
  71
  72         return (1);     /* don't let client exit */
  73 }
  74
  75 void
  76 cmd_run_shell_callback(struct job *job)
  77 {
  78         struct cmd_run_shell_data       *cdata = job->data;
  79         struct cmd_ctx                  *ctx = &cdata->ctx;
  80         char                            *cmd, *msg, *line;
  81         size_t                           size;
  82         int                              retcode;
  83         u_int                            lines;
  84
  85         if (ctx->cmdclient != NULL && ctx->cmdclient->flags & CLIENT_DEAD)
  86                 return;
  87         if (ctx->curclient != NULL && ctx->curclient->flags & CLIENT_DEAD)
  88                 return;
  89
  90         lines = 0;
  91         do {
  92                 if ((line = evbuffer_readline(job->event->input)) != NULL) {
  93                         ctx->print(ctx, "%s", line);
  94                         lines++;
  95                 }
  96         } while (line != NULL);
  97
  98         size = EVBUFFER_LENGTH(job->event->input);
  99         if (size != 0) {
 100                 line = xmalloc(size + 1);
 101                 memcpy(line, EVBUFFER_DATA(job->event->input), size);
 102                 line[size] = '\0';
 103
 104                 ctx->print(ctx, "%s", line);
 105                 lines++;
 106
 107                 xfree(line);
 108         }
 109
 110         cmd = cdata->cmd;
 111
 112         msg = NULL;
 113         if (WIFEXITED(job->status)) {
 114                 if ((retcode = WEXITSTATUS(job->status)) != 0)
 115                         xasprintf(&msg, "'%s' returned %d", cmd, retcode);
 116         } else if (WIFSIGNALED(job->status)) {
 117                 retcode = WTERMSIG(job->status);
 118                 xasprintf(&msg, "'%s' terminated by signal %d", cmd, retcode);
 119         }
 120         if (msg != NULL) {
 121                 if (lines != 0)
 122                         ctx->print(ctx, "%s", msg);
 123                 else
 124                         ctx->info(ctx, "%s", msg);
 125                 xfree(msg);
 126         }
 127 }
 128
 129 void
 130 cmd_run_shell_free(void *data)
 131 {
 132         struct cmd_run_shell_data       *cdata = data;
 133         struct cmd_ctx                  *ctx = &cdata->ctx;
 134
 135         if (ctx->cmdclient != NULL) {
 136                 ctx->cmdclient->references--;
 137                 ctx->cmdclient->flags |= CLIENT_EXIT;
 138         }
 139         if (ctx->curclient != NULL)
 140                 ctx->curclient->references--;
 141
 142         xfree(cdata->cmd);
 143         xfree(cdata);
 144 }