GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/tmux/cmd-save-buffer.c Lines: 0 56 0.0 %
Date: 2017-11-13 Branches: 0 28 0.0 %

Line Branch Exec Source
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/* $OpenBSD: cmd-save-buffer.c,v 1.43 2017/04/22 06:13:30 nicm Exp $ */
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/*
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 * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <vis.h>
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#include "tmux.h"
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/*
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 * Saves a paste buffer to a file.
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 */
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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 = {
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	.name = "save-buffer",
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	.alias = "saveb",
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	.args = { "ab:", 1, 1 },
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	.usage = "[-a] " CMD_BUFFER_USAGE " path",
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	.flags = CMD_AFTERHOOK,
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	.exec = cmd_save_buffer_exec
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};
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const struct cmd_entry cmd_show_buffer_entry = {
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	.name = "show-buffer",
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	.alias = "showb",
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	.args = { "b:", 0, 0 },
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	.usage = CMD_BUFFER_USAGE,
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	.flags = CMD_AFTERHOOK,
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	.exec = cmd_save_buffer_exec
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};
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static enum cmd_retval
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cmd_save_buffer_exec(struct cmd *self, struct cmdq_item *item)
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{
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	struct args		*args = self->args;
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	struct client		*c = item->client;
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	struct paste_buffer	*pb;
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	const char		*path, *bufname, *bufdata, *start, *end;
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	const char		*flags;
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	char			*msg, *file;
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	size_t			 size, used, msglen, bufsize;
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	FILE			*f;
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	if (!args_has(args, 'b')) {
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		if ((pb = paste_get_top(NULL)) == NULL) {
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			cmdq_error(item, "no buffers");
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			return (CMD_RETURN_ERROR);
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		}
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	} else {
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		bufname = args_get(args, 'b');
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		pb = paste_get_name(bufname);
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		if (pb == NULL) {
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			cmdq_error(item, "no buffer %s", bufname);
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			return (CMD_RETURN_ERROR);
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		}
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	}
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	bufdata = paste_buffer_data(pb, &bufsize);
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	if (self->entry == &cmd_show_buffer_entry)
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		path = "-";
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	else
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		path = args->argv[0];
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	if (strcmp(path, "-") == 0) {
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		if (c == NULL) {
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			cmdq_error(item, "can't write to stdout");
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			return (CMD_RETURN_ERROR);
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		}
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		if (c->session == NULL || (c->flags & CLIENT_CONTROL))
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			goto do_stdout;
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		goto do_print;
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	}
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	flags = "wb";
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	if (args_has(self->args, 'a'))
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		flags = "ab";
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	file = server_client_get_path(c, path);
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	f = fopen(file, flags);
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	if (f == NULL) {
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		cmdq_error(item, "%s: %s", file, strerror(errno));
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		free(file);
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		return (CMD_RETURN_ERROR);
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	}
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	if (fwrite(bufdata, 1, bufsize, f) != bufsize) {
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		cmdq_error(item, "%s: write error", file);
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		fclose(f);
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		free(file);
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		return (CMD_RETURN_ERROR);
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	}
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	fclose(f);
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	free(file);
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	return (CMD_RETURN_NORMAL);
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do_stdout:
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	evbuffer_add(c->stdout_data, bufdata, bufsize);
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	server_client_push_stdout(c);
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	return (CMD_RETURN_NORMAL);
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do_print:
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	if (bufsize > (INT_MAX / 4) - 1) {
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		cmdq_error(item, "buffer too big");
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		return (CMD_RETURN_ERROR);
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	}
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	msg = NULL;
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	used = 0;
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	while (used != bufsize) {
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		start = bufdata + used;
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		end = memchr(start, '\n', bufsize - used);
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		if (end != NULL)
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			size = end - start;
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		else
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			size = bufsize - used;
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		msglen = size * 4 + 1;
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		msg = xrealloc(msg, msglen);
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		strvisx(msg, start, size, VIS_OCTAL|VIS_TAB);
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		cmdq_print(item, "%s", msg);
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		used += size + (end != NULL);
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	}
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	free(msg);
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	return (CMD_RETURN_NORMAL);
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}