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/* $OpenBSD: cmd-load-buffer.c,v 1.49 2017/02/14 18:13:05 nicm Exp $ */
/*
* 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 <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "tmux.h"
/*
* Loads a paste buffer from a file.
*/
static enum cmd_retval cmd_load_buffer_exec(struct cmd *, struct cmdq_item *);
static void cmd_load_buffer_callback(struct client *, int, void *);
const struct cmd_entry cmd_load_buffer_entry = {
.name = "load-buffer",
.alias = "loadb",
.args = { "b:", 1, 1 },
.usage = CMD_BUFFER_USAGE " path",
.flags = CMD_AFTERHOOK,
.exec = cmd_load_buffer_exec
};
struct cmd_load_buffer_data {
struct cmdq_item *item;
char *bufname;
};
static enum cmd_retval
cmd_load_buffer_exec(struct cmd *self, struct cmdq_item *item)
{
struct args *args = self->args;
struct cmd_load_buffer_data *cdata;
struct client *c = item->client;
FILE *f;
const char *path, *bufname;
char *pdata, *new_pdata, *cause, *file;
size_t psize;
int ch, error;
bufname = NULL;
if (args_has(args, 'b'))
bufname = args_get(args, 'b');
path = args->argv[0];
if (strcmp(path, "-") == 0) {
cdata = xcalloc(1, sizeof *cdata);
cdata->item = item;
if (bufname != NULL)
cdata->bufname = xstrdup(bufname);
error = server_set_stdin_callback(c, cmd_load_buffer_callback,
cdata, &cause);
if (error != 0) {
cmdq_error(item, "%s: %s", path, cause);
free(cause);
return (CMD_RETURN_ERROR);
}
return (CMD_RETURN_WAIT);
}
file = server_client_get_path(c, path);
f = fopen(file, "rb");
if (f == NULL) {
cmdq_error(item, "%s: %s", file, strerror(errno));
free(file);
return (CMD_RETURN_ERROR);
}
pdata = NULL;
psize = 0;
while ((ch = getc(f)) != EOF) {
/* Do not let the server die due to memory exhaustion. */
if ((new_pdata = realloc(pdata, psize + 2)) == NULL) {
cmdq_error(item, "realloc error: %s", strerror(errno));
goto error;
}
pdata = new_pdata;
pdata[psize++] = ch;
}
if (ferror(f)) {
cmdq_error(item, "%s: read error", file);
goto error;
}
if (pdata != NULL)
pdata[psize] = '\0';
fclose(f);
free(file);
if (paste_set(pdata, psize, bufname, &cause) != 0) {
cmdq_error(item, "%s", cause);
free(pdata);
free(cause);
return (CMD_RETURN_ERROR);
}
return (CMD_RETURN_NORMAL);
error:
free(pdata);
if (f != NULL)
fclose(f);
return (CMD_RETURN_ERROR);
}
static void
cmd_load_buffer_callback(struct client *c, int closed, void *data)
{
struct cmd_load_buffer_data *cdata = data;
char *pdata, *cause, *saved;
size_t psize;
if (!closed)
return;
c->stdin_callback = NULL;
server_client_unref(c);
if (c->flags & CLIENT_DEAD)
goto out;
psize = EVBUFFER_LENGTH(c->stdin_data);
if (psize == 0 || (pdata = malloc(psize + 1)) == NULL)
goto out;
memcpy(pdata, EVBUFFER_DATA(c->stdin_data), psize);
pdata[psize] = '\0';
evbuffer_drain(c->stdin_data, psize);
if (paste_set(pdata, psize, cdata->bufname, &cause) != 0) {
/* No context so can't use server_client_msg_error. */
if (~c->flags & CLIENT_UTF8) {
saved = cause;
cause = utf8_sanitize(saved);
free(saved);
}
evbuffer_add_printf(c->stderr_data, "%s", cause);
server_client_push_stderr(c);
free(pdata);
free(cause);
}
out:
cdata->item->flags &= ~CMDQ_WAITING;
free(cdata->bufname);
free(cdata);
}
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