[35ffd0]: cmd-load-buffer.c Maximize Restore History

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cmd-load-buffer.c    158 lines (133 with data), 3.7 kB

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/* $Id$ */
/*
* 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.
*/
enum cmd_retval cmd_load_buffer_exec(struct cmd *, struct cmd_q *);
void cmd_load_buffer_callback(struct client *, int, void *);
const struct cmd_entry cmd_load_buffer_entry = {
"load-buffer", "loadb",
"b:", 1, 1,
CMD_BUFFER_USAGE " path",
0,
cmd_load_buffer_exec
};
enum cmd_retval
cmd_load_buffer_exec(struct cmd *self, struct cmd_q *cmdq)
{
struct args *args = self->args;
struct client *c = cmdq->client;
struct session *s;
FILE *f;
const char *path, *bufname;
char *pdata, *new_pdata, *cause;
size_t psize;
int ch, error, cwd, fd;
bufname = NULL;
if (args_has(args, 'b'))
bufname = args_get(args, 'b');
path = args->argv[0];
if (strcmp(path, "-") == 0) {
error = server_set_stdin_callback(c, cmd_load_buffer_callback,
(void *)bufname, &cause);
if (error != 0) {
cmdq_error(cmdq, "%s: %s", path, cause);
free(cause);
return (CMD_RETURN_ERROR);
}
return (CMD_RETURN_WAIT);
}
if (c != NULL && c->session == NULL)
cwd = c->cwd;
else if ((s = cmd_current_session(cmdq, 0)) != NULL)
cwd = s->cwd;
else
cwd = AT_FDCWD;
if ((fd = openat(cwd, path, O_RDONLY)) == -1 ||
(f = fdopen(fd, "rb")) == NULL) {
if (fd != -1)
close(fd);
cmdq_error(cmdq, "%s: %s", path, strerror(errno));
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(cmdq, "realloc error: %s", strerror(errno));
goto error;
}
pdata = new_pdata;
pdata[psize++] = ch;
}
if (ferror(f)) {
cmdq_error(cmdq, "%s: read error", path);
goto error;
}
if (pdata != NULL)
pdata[psize] = '\0';
fclose(f);
if (paste_set(pdata, psize, bufname, &cause) != 0) {
cmdq_error(cmdq, "%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);
}
void
cmd_load_buffer_callback(struct client *c, int closed, void *data)
{
const char *bufname = data;
char *pdata, *cause;
size_t psize;
if (!closed)
return;
c->stdin_callback = NULL;
c->references--;
if (c->flags & CLIENT_DEAD)
return;
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, bufname, &cause) != 0) {
/* No context so can't use server_client_msg_error. */
evbuffer_add_printf(c->stderr_data, "%s", cause);
server_push_stderr(c);
free(pdata);
free(cause);
}
out:
cmdq_continue(c->cmdq);
}