tmux/cmd-load-buffer.c
Tiago Cunha ffab6dbc9a Sync OpenBSD patchset 1114:
Instead of passing stdin/stdout/stderr file descriptors over imsg and
handling them in the server, handle them in the client and pass buffers
over imsg. This is much tidier for some upcoming changes and the
performance hit isn't critical.

The tty fd is still passed to the server as before.

This bumps the tmux protocol version so new clients and old servers are
incompatible.
2012-05-22 20:56:35 +00:00

179 lines
4.1 KiB
C

/* $Id$ */
/*
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "tmux.h"
/*
* Loads a paste buffer from a file.
*/
int cmd_load_buffer_exec(struct cmd *, struct cmd_ctx *);
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,
NULL,
NULL,
cmd_load_buffer_exec
};
int
cmd_load_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
{
struct args *args = self->args;
struct client *c = ctx->cmdclient;
struct session *s;
FILE *f;
const char *path, *newpath, *wd;
char *pdata, *new_pdata, *cause;
size_t psize;
u_int limit;
int ch, error, buffer, *buffer_ptr;
if (!args_has(args, 'b'))
buffer = -1;
else {
buffer = args_strtonum(args, 'b', 0, INT_MAX, &cause);
if (cause != NULL) {
ctx->error(ctx, "buffer %s", cause);
xfree(cause);
return (-1);
}
}
path = args->argv[0];
if (strcmp(path, "-") == 0) {
buffer_ptr = xmalloc(sizeof *buffer_ptr);
*buffer_ptr = buffer;
error = server_set_stdin_callback (c, cmd_load_buffer_callback,
buffer_ptr, &cause);
if (error != 0) {
ctx->error(ctx, "%s: %s", path, cause);
xfree(cause);
return (-1);
}
return (1);
}
if (c != NULL)
wd = c->cwd;
else if ((s = cmd_current_session(ctx, 0)) != NULL) {
wd = options_get_string(&s->options, "default-path");
if (*wd == '\0')
wd = s->cwd;
} else
wd = NULL;
if (wd != NULL && *wd != '\0') {
newpath = get_full_path(wd, path);
if (newpath != NULL)
path = newpath;
}
if ((f = fopen(path, "rb")) == NULL) {
ctx->error(ctx, "%s: %s", path, strerror(errno));
return (-1);
}
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) {
ctx->error(ctx, "realloc error: %s", strerror(errno));
goto error;
}
pdata = new_pdata;
pdata[psize++] = ch;
}
if (ferror(f)) {
ctx->error(ctx, "%s: read error", path);
goto error;
}
if (pdata != NULL)
pdata[psize] = '\0';
fclose(f);
limit = options_get_number(&global_options, "buffer-limit");
if (buffer == -1) {
paste_add(&global_buffers, pdata, psize, limit);
return (0);
}
if (paste_replace(&global_buffers, buffer, pdata, psize) != 0) {
ctx->error(ctx, "no buffer %d", buffer);
xfree(pdata);
return (-1);
}
return (0);
error:
if (pdata != NULL)
xfree(pdata);
if (f != NULL)
fclose(f);
return (-1);
}
void
cmd_load_buffer_callback(struct client *c, int closed, void *data)
{
int *buffer = data;
char *pdata;
size_t psize;
u_int limit;
if (!closed)
return;
c->stdin_callback = NULL;
c->references--;
c->flags |= CLIENT_EXIT;
psize = EVBUFFER_LENGTH(c->stdin_data);
if (psize == 0 || (pdata = malloc(psize + 1)) == NULL) {
xfree(data);
return;
}
memcpy(pdata, EVBUFFER_DATA(c->stdin_data), psize);
pdata[psize] = '\0';
evbuffer_drain(c->stdin_data, psize);
limit = options_get_number(&global_options, "buffer-limit");
if (*buffer == -1)
paste_add(&global_buffers, pdata, psize, limit);
else if (paste_replace(&global_buffers, *buffer, pdata, psize) != 0) {
/* No context so can't use server_client_msg_error. */
evbuffer_add_printf(c->stderr_data, "no buffer %d\n", *buffer);
server_push_stderr(c);
}
xfree(data);
}