cmd-if-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  * Executes a tmux command if a shell command returns true.
  29  */
  30
  31 int     cmd_if_shell_exec(struct cmd *, struct cmd_ctx *);
  32
  33 void    cmd_if_shell_callback(struct job *);
  34 void    cmd_if_shell_free(void *);
  35
  36 const struct cmd_entry cmd_if_shell_entry = {
  37         "if-shell", "if",
  38         "", 2, 2,
  39         "shell-command command",
  40         0,
  41         NULL,
  42         NULL,
  43         cmd_if_shell_exec
  44 };
  45
  46 struct cmd_if_shell_data {
  47         char            *cmd;
  48         struct cmd_ctx   ctx;
  49 };
  50
  51 int
  52 cmd_if_shell_exec(struct cmd *self, struct cmd_ctx *ctx)
  53 {
  54         struct args                     *args = self->args;
  55         struct cmd_if_shell_data        *cdata;
  56         struct job                      *job;
  57
  58         cdata = xmalloc(sizeof *cdata);
  59         cdata->cmd = xstrdup(args->argv[1]);
  60         memcpy(&cdata->ctx, ctx, sizeof cdata->ctx);
  61
  62         if (ctx->cmdclient != NULL)
  63                 ctx->cmdclient->references++;
  64         if (ctx->curclient != NULL)
  65                 ctx->curclient->references++;
  66
  67         job = job_add(NULL, 0, NULL,
  68             args->argv[0], cmd_if_shell_callback, cmd_if_shell_free, cdata);
  69         job_run(job);
  70
  71         return (1);     /* don't let client exit */
  72 }
  73
  74 void
  75 cmd_if_shell_callback(struct job *job)
  76 {
  77         struct cmd_if_shell_data        *cdata = job->data;
  78         struct cmd_ctx                  *ctx = &cdata->ctx;
  79         struct cmd_list                 *cmdlist;
  80         char                            *cause;
  81
  82         if (!WIFEXITED(job->status) || WEXITSTATUS(job->status) != 0)
  83                 return;
  84
  85         if (cmd_string_parse(cdata->cmd, &cmdlist, &cause) != 0) {
  86                 if (cause != NULL) {
  87                         ctx->error(ctx, "%s", cause);
  88                         xfree(cause);
  89                 }
  90                 return;
  91         }
  92
  93         if (cmd_list_exec(cmdlist, ctx) < 0) {
  94                 cmd_list_free(cmdlist);
  95                 return;
  96         }
  97
  98         cmd_list_free(cmdlist);
  99 }
 100
 101 void
 102 cmd_if_shell_free(void *data)
 103 {
 104         struct cmd_if_shell_data        *cdata = data;
 105         struct cmd_ctx                  *ctx = &cdata->ctx;
 106         struct msg_exit_data             exitdata;
 107
 108         if (ctx->cmdclient != NULL) {
 109                 ctx->cmdclient->references--;
 110                 exitdata.retcode = ctx->cmdclient->retcode;
 111                 ctx->cmdclient->flags |= CLIENT_EXIT;
 112         }
 113         if (ctx->curclient != NULL)
 114                 ctx->curclient->references--;
 115
 116         xfree(cdata->cmd);
 117         xfree(cdata);
 118 }