tmux/cmd-save-buffer.c
nicm 282c5f9644 Alter how tmux handles the working directory to internally use file
descriptors rather than strings.

- Each session still has a current working directory.

- New sessions still get their working directory from the client that
  created them or its attached session if any.

- New windows are created by default in the session working directory.

- The -c flag to new, neww, splitw allows the working directory to be
  overridden.

- The -c flag to attach let's the session working directory be changed.

- The default-path option has been removed.

To get the equivalent to default-path '.', do:

        bind c neww -c $PWD

To get the equivalent of default-path '~', do:

        bind c neww -c ~

This also changes the client identify protocol to be a set of messages rather
than one as well as some other changes that should make it easier to make
backwards-compatible protocol changes in future.
2013-10-10 12:26:34 +00:00

168 lines
3.8 KiB
C

/* $OpenBSD$ */
/*
* 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 <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <vis.h>
#include "tmux.h"
/*
* Saves a paste buffer to a file.
*/
enum cmd_retval cmd_save_buffer_exec(struct cmd *, struct cmd_q *);
const struct cmd_entry cmd_save_buffer_entry = {
"save-buffer", "saveb",
"ab:", 1, 1,
"[-a] " CMD_BUFFER_USAGE " path",
0,
NULL,
cmd_save_buffer_exec
};
const struct cmd_entry cmd_show_buffer_entry = {
"show-buffer", "showb",
"b:", 0, 0,
CMD_BUFFER_USAGE,
0,
NULL,
cmd_save_buffer_exec
};
enum cmd_retval
cmd_save_buffer_exec(struct cmd *self, struct cmd_q *cmdq)
{
struct args *args = self->args;
struct client *c = cmdq->client;
struct session *s;
struct paste_buffer *pb;
const char *path;
char *cause, *start, *end, *msg;
size_t size, used, msglen;
int cwd, fd, buffer;
FILE *f;
if (!args_has(args, 'b')) {
if ((pb = paste_get_top(&global_buffers)) == NULL) {
cmdq_error(cmdq, "no buffers");
return (CMD_RETURN_ERROR);
}
} else {
buffer = args_strtonum(args, 'b', 0, INT_MAX, &cause);
if (cause != NULL) {
cmdq_error(cmdq, "buffer %s", cause);
free(cause);
return (CMD_RETURN_ERROR);
}
pb = paste_get_index(&global_buffers, buffer);
if (pb == NULL) {
cmdq_error(cmdq, "no buffer %d", buffer);
return (CMD_RETURN_ERROR);
}
}
if (self->entry == &cmd_show_buffer_entry)
path = "-";
else
path = args->argv[0];
if (strcmp(path, "-") == 0) {
if (c == NULL) {
cmdq_error(cmdq, "can't write to stdout");
return (CMD_RETURN_ERROR);
}
if (c->session == NULL || (c->flags & CLIENT_CONTROL))
goto do_stdout;
goto do_print;
}
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;
f = NULL;
if (args_has(self->args, 'a')) {
fd = openat(cwd, path, O_CREAT|O_RDWR|O_APPEND, 0600);
if (fd != -1)
f = fdopen(fd, "ab");
} else {
fd = openat(cwd, path, O_CREAT|O_RDWR, 0600);
if (fd != -1)
f = fdopen(fd, "wb");
}
if (f == NULL) {
if (fd != -1)
close(fd);
cmdq_error(cmdq, "%s: %s", path, strerror(errno));
return (CMD_RETURN_ERROR);
}
if (fwrite(pb->data, 1, pb->size, f) != pb->size) {
cmdq_error(cmdq, "%s: fwrite error", path);
fclose(f);
return (CMD_RETURN_ERROR);
}
fclose(f);
return (CMD_RETURN_NORMAL);
do_stdout:
evbuffer_add(c->stdout_data, pb->data, pb->size);
server_push_stdout(c);
return (CMD_RETURN_NORMAL);
do_print:
if (pb->size > (INT_MAX / 4) - 1) {
cmdq_error(cmdq, "buffer too big");
return (CMD_RETURN_ERROR);
}
msg = NULL;
msglen = 0;
used = 0;
while (used != pb->size) {
start = pb->data + used;
end = memchr(start, '\n', pb->size - used);
if (end != NULL)
size = end - start;
else
size = pb->size - used;
msglen = size * 4 + 1;
msg = xrealloc(msg, 1, msglen);
strvisx(msg, start, size, VIS_OCTAL|VIS_TAB);
cmdq_print(cmdq, "%s", msg);
used += size + (end != NULL);
}
free(msg);
return (CMD_RETURN_NORMAL);
}