GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/tmux/cmd-load-buffer.c Lines: 0 70 0.0 %
Date: 2017-11-13 Branches: 0 42 0.0 %

Line Branch Exec Source
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/* $OpenBSD: cmd-load-buffer.c,v 1.50 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 <errno.h>
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#include <fcntl.h>
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#include <stdio.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 "tmux.h"
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/*
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 * Loads a paste buffer from a file.
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 */
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static enum cmd_retval	cmd_load_buffer_exec(struct cmd *, struct cmdq_item *);
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static void		cmd_load_buffer_callback(struct client *, int, void *);
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const struct cmd_entry cmd_load_buffer_entry = {
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	.name = "load-buffer",
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	.alias = "loadb",
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	.args = { "b:", 1, 1 },
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	.usage = CMD_BUFFER_USAGE " path",
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	.flags = CMD_AFTERHOOK,
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	.exec = cmd_load_buffer_exec
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};
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struct cmd_load_buffer_data {
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	struct cmdq_item	*item;
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	char			*bufname;
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};
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static enum cmd_retval
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cmd_load_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 cmd_load_buffer_data	*cdata;
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	struct client			*c = item->client;
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	FILE				*f;
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	const char			*path, *bufname;
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	char				*pdata, *new_pdata, *cause, *file;
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	size_t				 psize;
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	int				 ch, error;
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	bufname = NULL;
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	if (args_has(args, 'b'))
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		bufname = args_get(args, 'b');
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	path = args->argv[0];
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	if (strcmp(path, "-") == 0) {
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		cdata = xcalloc(1, sizeof *cdata);
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		cdata->item = item;
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		if (bufname != NULL)
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			cdata->bufname = xstrdup(bufname);
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		error = server_set_stdin_callback(c, cmd_load_buffer_callback,
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		    cdata, &cause);
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		if (error != 0) {
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			cmdq_error(item, "%s: %s", path, cause);
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			free(cause);
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			return (CMD_RETURN_ERROR);
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		}
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		return (CMD_RETURN_WAIT);
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	}
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	file = server_client_get_path(c, path);
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	f = fopen(file, "rb");
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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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	pdata = NULL;
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	psize = 0;
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	while ((ch = getc(f)) != EOF) {
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		/* Do not let the server die due to memory exhaustion. */
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		if ((new_pdata = realloc(pdata, psize + 2)) == NULL) {
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			cmdq_error(item, "realloc error: %s", strerror(errno));
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			goto error;
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		}
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		pdata = new_pdata;
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		pdata[psize++] = ch;
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	}
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	if (ferror(f)) {
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		cmdq_error(item, "%s: read error", file);
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		goto error;
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	}
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	if (pdata != NULL)
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		pdata[psize] = '\0';
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	fclose(f);
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	free(file);
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	if (paste_set(pdata, psize, bufname, &cause) != 0) {
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		cmdq_error(item, "%s", cause);
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		free(pdata);
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		free(cause);
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		return (CMD_RETURN_ERROR);
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	}
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	return (CMD_RETURN_NORMAL);
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error:
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	free(pdata);
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	if (f != NULL)
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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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static void
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cmd_load_buffer_callback(struct client *c, int closed, void *data)
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{
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	struct cmd_load_buffer_data	*cdata = data;
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	char				*pdata, *cause, *saved;
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	size_t				 psize;
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	if (!closed)
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		return;
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	c->stdin_callback = NULL;
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	server_client_unref(c);
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	if (c->flags & CLIENT_DEAD)
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		goto out;
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	psize = EVBUFFER_LENGTH(c->stdin_data);
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	if (psize == 0 || (pdata = malloc(psize + 1)) == NULL)
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		goto out;
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	memcpy(pdata, EVBUFFER_DATA(c->stdin_data), psize);
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	pdata[psize] = '\0';
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	evbuffer_drain(c->stdin_data, psize);
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	if (paste_set(pdata, psize, cdata->bufname, &cause) != 0) {
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		/* No context so can't use server_client_msg_error. */
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		if (~c->flags & CLIENT_UTF8) {
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			saved = cause;
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			cause = utf8_sanitize(saved);
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			free(saved);
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		}
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		evbuffer_add_printf(c->stderr_data, "%s", cause);
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		server_client_push_stderr(c);
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		free(pdata);
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		free(cause);
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	}
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out:
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	cdata->item->flags &= ~CMDQ_WAITING;
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	free(cdata->bufname);
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	free(cdata);
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}