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 #include <vis.h>
  28
  29 #include "tmux.h"
  30
  31 /*
  32  * Saves a paste buffer to a file.
  33  */
  34
  35 static enum cmd_retval  cmd_save_buffer_exec(struct cmd *, struct cmdq_item *);
  36
  37 const struct cmd_entry cmd_save_buffer_entry = {
  38         .name = "save-buffer",
  39         .alias = "saveb",
  40
  41         .args = { "ab:", 1, 1, NULL },
  42         .usage = "[-a] " CMD_BUFFER_USAGE " path",
  43
  44         .flags = CMD_AFTERHOOK,
  45         .exec = cmd_save_buffer_exec
  46 };
  47
  48 const struct cmd_entry cmd_show_buffer_entry = {
  49         .name = "show-buffer",
  50         .alias = "showb",
  51
  52         .args = { "b:", 0, 0, NULL },
  53         .usage = CMD_BUFFER_USAGE,
  54
  55         .flags = CMD_AFTERHOOK,
  56         .exec = cmd_save_buffer_exec
  57 };
  58
  59 static void
  60 cmd_save_buffer_done(__unused struct client *c, const char *path, int error,
  61     __unused int closed, __unused struct evbuffer *buffer, void *data)
  62 {
  63         struct cmdq_item        *item = data;
  64
  65         if (!closed)
  66                 return;
  67
  68         if (error != 0)
  69                 cmdq_error(item, "%s: %s", path, strerror(error));
  70         cmdq_continue(item);
  71 }
  72
  73 static enum cmd_retval
  74 cmd_save_buffer_exec(struct cmd *self, struct cmdq_item *item)
  75 {
  76         struct args             *args = cmd_get_args(self);
  77         struct client           *c = cmdq_get_client(item);
  78         struct paste_buffer     *pb;
  79         int                      flags;
  80         const char              *bufname = args_get(args, 'b'), *bufdata;
  81         size_t                   bufsize;
  82         char                    *path;
  83         struct evbuffer         *evb;
  84
  85         if (bufname == NULL) {
  86                 if ((pb = paste_get_top(NULL)) == NULL) {
  87                         cmdq_error(item, "no buffers");
  88                         return (CMD_RETURN_ERROR);
  89                 }
  90         } else {
  91                 pb = paste_get_name(bufname);
  92                 if (pb == NULL) {
  93                         cmdq_error(item, "no buffer %s", bufname);
  94                         return (CMD_RETURN_ERROR);
  95                 }
  96         }
  97         bufdata = paste_buffer_data(pb, &bufsize);
  98
  99         if (cmd_get_entry(self) == &cmd_show_buffer_entry) {
 100                 if (c->session != NULL || (c->flags & CLIENT_CONTROL)) {
 101                         evb = evbuffer_new();
 102                         if (evb == NULL)
 103                                 fatalx("out of memory");
 104                         evbuffer_add(evb, bufdata, bufsize);
 105                         cmdq_print_data(item, 1, evb);
 106                         evbuffer_free(evb);
 107                         return (CMD_RETURN_NORMAL);
 108                 }
 109                 path = xstrdup("-");
 110         } else
 111                 path = format_single_from_target(item, args_string(args, 0));
 112         if (args_has(args, 'a'))
 113                 flags = O_APPEND;
 114         else
 115                 flags = O_TRUNC;
 116         file_write(cmdq_get_client(item), path, flags, bufdata, bufsize,
 117             cmd_save_buffer_done, item);
 118         free(path);
 119
 120         return (CMD_RETURN_WAIT);
 121 }