cmd-save-buffer.c

   1 /* $OpenBSD$ */
   2
   3 /*
   4  * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
  15  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  16  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include <sys/types.h>
  20 #include <sys/stat.h>
  21
  22 #include <errno.h>
  23 #include <fcntl.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27
  28 #include "tmux.h"
  29
  30 /*
  31  * Saves a paste buffer to a file.
  32  */
  33
  34 static enum cmd_retval  cmd_save_buffer_exec(struct cmd *, struct cmdq_item *);
  35
  36 const struct cmd_entry cmd_save_buffer_entry = {
  37         .name = "save-buffer",
  38         .alias = "saveb",
  39
  40         .args = { "ab:", 1, 1, NULL },
  41         .usage = "[-a] " CMD_BUFFER_USAGE " path",
  42
  43         .flags = CMD_AFTERHOOK,
  44         .exec = cmd_save_buffer_exec
  45 };
  46
  47 const struct cmd_entry cmd_show_buffer_entry = {
  48         .name = "show-buffer",
  49         .alias = "showb",
  50
  51         .args = { "b:", 0, 0, NULL },
  52         .usage = CMD_BUFFER_USAGE,
  53
  54         .flags = CMD_AFTERHOOK,
  55         .exec = cmd_save_buffer_exec
  56 };
  57
  58 static void
  59 cmd_save_buffer_done(__unused struct client *c, const char *path, int error,
  60     __unused int closed, __unused struct evbuffer *buffer, void *data)
  61 {
  62         struct cmdq_item        *item = data;
  63
  64         if (!closed)
  65                 return;
  66
  67         if (error != 0)
  68                 cmdq_error(item, "%s: %s", path, strerror(error));
  69         cmdq_continue(item);
  70 }
  71
  72 static enum cmd_retval
  73 cmd_save_buffer_exec(struct cmd *self, struct cmdq_item *item)
  74 {
  75         struct args             *args = cmd_get_args(self);
  76         struct client           *c = cmdq_get_client(item);
  77         struct paste_buffer     *pb;
  78         int                      flags;
  79         const char              *bufname = args_get(args, 'b'), *bufdata;
  80         size_t                   bufsize;
  81         char                    *path;
  82         struct evbuffer         *evb;
  83
  84         if (bufname == NULL) {
  85                 if ((pb = paste_get_top(NULL)) == NULL) {
  86                         cmdq_error(item, "no buffers");
  87                         return (CMD_RETURN_ERROR);
  88                 }
  89         } else {
  90                 pb = paste_get_name(bufname);
  91                 if (pb == NULL) {
  92                         cmdq_error(item, "no buffer %s", bufname);
  93                         return (CMD_RETURN_ERROR);
  94                 }
  95         }
  96         bufdata = paste_buffer_data(pb, &bufsize);
  97
  98         if (cmd_get_entry(self) == &cmd_show_buffer_entry) {
  99                 if (c->session != NULL || (c->flags & CLIENT_CONTROL)) {
 100                         evb = evbuffer_new();
 101                         if (evb == NULL)
 102                                 fatalx("out of memory");
 103                         evbuffer_add(evb, bufdata, bufsize);
 104                         cmdq_print_data(item, 1, evb);
 105                         evbuffer_free(evb);
 106                         return (CMD_RETURN_NORMAL);
 107                 }
 108                 path = xstrdup("-");
 109         } else
 110                 path = format_single_from_target(item, args_string(args, 0));
 111         if (args_has(args, 'a'))
 112                 flags = O_APPEND;
 113         else
 114                 flags = O_TRUNC;
 115         file_write(cmdq_get_client(item), path, flags, bufdata, bufsize,
 116             cmd_save_buffer_done, item);
 117         free(path);
 118
 119         return (CMD_RETURN_WAIT);
 120 }