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         "", 1, 1,
  39         "command",
  40         0,
  41         NULL,
  42         NULL,
  43         cmd_run_shell_exec
  44 };
  45
  46 struct cmd_run_shell_data {
  47         char            *cmd;
  48         struct cmd_ctx   ctx;
  49 };
  50
  51 int
  52 cmd_run_shell_exec(struct cmd *self, struct cmd_ctx *ctx)
  53 {
  54         struct args                     *args = self->args;
  55         struct cmd_run_shell_data       *cdata;
  56         struct job                      *job;
  57
  58         cdata = xmalloc(sizeof *cdata);
  59         cdata->cmd = xstrdup(args->argv[0]);
  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_run_shell_callback, cmd_run_shell_free, cdata);
  69         job_run(job);
  70
  71         return (1);     /* don't let client exit */
  72 }
  73
  74 void
  75 cmd_run_shell_callback(struct job *job)
  76 {
  77         struct cmd_run_shell_data       *cdata = job->data;
  78         struct cmd_ctx                  *ctx = &cdata->ctx;
  79         char                            *cmd, *msg, *line;
  80         size_t                           size;
  81         int                              retcode;
  82         u_int                            lines;
  83
  84         if (ctx->cmdclient != NULL && ctx->cmdclient->flags & CLIENT_DEAD)
  85                 return;
  86         if (ctx->curclient != NULL && ctx->curclient->flags & CLIENT_DEAD)
  87                 return;
  88
  89         lines = 0;
  90         do {
  91                 if ((line = evbuffer_readline(job->event->input)) != NULL) {
  92                         ctx->print(ctx, "%s", line);
  93                         lines++;
  94                 }
  95         } while (line != NULL);
  96
  97         size = EVBUFFER_LENGTH(job->event->input);
  98         if (size != 0) {
  99                 line = xmalloc(size + 1);
 100                 memcpy(line, EVBUFFER_DATA(job->event->input), size);
 101                 line[size] = '\0';
 102
 103                 ctx->print(ctx, "%s", line);
 104                 lines++;
 105
 106                 xfree(line);
 107         }
 108
 109         cmd = cdata->cmd;
 110
 111         msg = NULL;
 112         if (WIFEXITED(job->status)) {
 113                 if ((retcode = WEXITSTATUS(job->status)) != 0)
 114                         xasprintf(&msg, "'%s' returned %d", cmd, retcode);
 115         } else if (WIFSIGNALED(job->status)) {
 116                 retcode = WTERMSIG(job->status);
 117                 xasprintf(&msg, "'%s' terminated by signal %d", cmd, retcode);
 118         }
 119         if (msg != NULL) {
 120                 if (lines != 0)
 121                         ctx->print(ctx, "%s", msg);
 122                 else
 123                         ctx->info(ctx, "%s", msg);
 124                 xfree(msg);
 125         }
 126 }
 127
 128 void
 129 cmd_run_shell_free(void *data)
 130 {
 131         struct cmd_run_shell_data       *cdata = data;
 132         struct cmd_ctx                  *ctx = &cdata->ctx;
 133
 134         if (ctx->cmdclient != NULL) {
 135                 ctx->cmdclient->references--;
 136                 ctx->cmdclient->flags |= CLIENT_EXIT;
 137         }
 138         if (ctx->curclient != NULL)
 139                 ctx->curclient->references--;
 140
 141         xfree(cdata->cmd);
 142         xfree(cdata);
 143 }