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      1 /* $OpenBSD$ */
      2 
      3 /*
      4  * Copyright (c) 2009 Tiago Cunha <me (at) 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", strerror(error), path);
     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, 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 }
    121