tmux/cmd-save-buffer.c

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/* $OpenBSD$ */
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/*
* Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
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#include <string.h>
#include <unistd.h>
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#include "tmux.h"
/*
* Saves a paste buffer to a file.
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*/
static enum cmd_retval cmd_save_buffer_exec(struct cmd *, struct cmdq_item *);
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const struct cmd_entry cmd_save_buffer_entry = {
.name = "save-buffer",
.alias = "saveb",
.args = { "ab:", 1, 1 },
.usage = "[-a] " CMD_BUFFER_USAGE " path",
.flags = CMD_AFTERHOOK,
.exec = cmd_save_buffer_exec
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};
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const struct cmd_entry cmd_show_buffer_entry = {
.name = "show-buffer",
.alias = "showb",
.args = { "b:", 0, 0 },
.usage = CMD_BUFFER_USAGE,
.flags = CMD_AFTERHOOK,
.exec = cmd_save_buffer_exec
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};
static enum cmd_retval
cmd_save_buffer_exec(struct cmd *self, struct cmdq_item *item)
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{
struct args *args = self->args;
struct client *c = cmd_find_client(item, NULL, 1);
struct session *s = item->target.s;
struct winlink *wl = item->target.wl;
struct window_pane *wp = item->target.wp;
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struct paste_buffer *pb;
const char *bufname, *bufdata, *start, *end, *flags;
char *msg, *path, *file;
size_t size, used, msglen, bufsize;
FILE *f;
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if (!args_has(args, 'b')) {
if ((pb = paste_get_top(NULL)) == NULL) {
cmdq_error(item, "no buffers");
return (CMD_RETURN_ERROR);
}
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} else {
bufname = args_get(args, 'b');
pb = paste_get_name(bufname);
if (pb == NULL) {
cmdq_error(item, "no buffer %s", bufname);
return (CMD_RETURN_ERROR);
}
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}
bufdata = paste_buffer_data(pb, &bufsize);
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if (self->entry == &cmd_show_buffer_entry)
path = xstrdup("-");
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else
path = format_single(item, args->argv[0], c, s, wl, wp);
if (strcmp(path, "-") == 0) {
free(path);
c = item->client;
if (c == NULL) {
cmdq_error(item, "can't write to stdout");
return (CMD_RETURN_ERROR);
}
if (c->session == NULL || (c->flags & CLIENT_CONTROL))
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goto do_stdout;
goto do_print;
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}
flags = "wb";
if (args_has(self->args, 'a'))
flags = "ab";
file = server_client_get_path(item->client, path);
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free(path);
f = fopen(file, flags);
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if (f == NULL) {
cmdq_error(item, "%s: %s", file, strerror(errno));
free(file);
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return (CMD_RETURN_ERROR);
}
if (fwrite(bufdata, 1, bufsize, f) != bufsize) {
cmdq_error(item, "%s: write error", file);
fclose(f);
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free(file);
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return (CMD_RETURN_ERROR);
}
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fclose(f);
free(file);
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return (CMD_RETURN_NORMAL);
do_stdout:
evbuffer_add(c->stdout_data, bufdata, bufsize);
server_client_push_stdout(c);
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return (CMD_RETURN_NORMAL);
do_print:
if (bufsize > (INT_MAX / 4) - 1) {
cmdq_error(item, "buffer too big");
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return (CMD_RETURN_ERROR);
}
msg = NULL;
used = 0;
while (used != bufsize) {
start = bufdata + used;
end = memchr(start, '\n', bufsize - used);
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if (end != NULL)
size = end - start;
else
size = bufsize - used;
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msglen = size * 4 + 1;
msg = xrealloc(msg, msglen);
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strvisx(msg, start, size, VIS_OCTAL|VIS_TAB);
cmdq_print(item, "%s", msg);
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used += size + (end != NULL);
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}
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free(msg);
return (CMD_RETURN_NORMAL);
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}