mirror of
https://github.com/tmux/tmux.git
synced 2024-11-12 23:28:52 +00:00
1bdd4828bd
ends up pointing to the wrong place before it is passed to the client. The path is only used internally so there is no real need for realpath(), remove it and move the get_path function to file.c where all the callers are.
416 lines
8.5 KiB
C
416 lines
8.5 KiB
C
/* $OpenBSD$ */
|
|
|
|
/*
|
|
* Copyright (c) 2019 Nicholas Marriott <nicholas.marriott@gmail.com>
|
|
*
|
|
* 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/queue.h>
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <imsg.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "tmux.h"
|
|
|
|
static int file_next_stream = 3;
|
|
|
|
RB_GENERATE(client_files, client_file, entry, file_cmp);
|
|
|
|
static char *
|
|
file_get_path(struct client *c, const char *file)
|
|
{
|
|
char *path;
|
|
|
|
if (*file == '/')
|
|
path = xstrdup(file);
|
|
else
|
|
xasprintf(&path, "%s/%s", server_client_get_cwd(c, NULL), file);
|
|
return (path);
|
|
}
|
|
|
|
int
|
|
file_cmp(struct client_file *cf1, struct client_file *cf2)
|
|
{
|
|
if (cf1->stream < cf2->stream)
|
|
return (-1);
|
|
if (cf1->stream > cf2->stream)
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
struct client_file *
|
|
file_create(struct client *c, int stream, client_file_cb cb, void *cbdata)
|
|
{
|
|
struct client_file *cf;
|
|
|
|
cf = xcalloc(1, sizeof *cf);
|
|
cf->c = c;
|
|
cf->references = 1;
|
|
cf->stream = stream;
|
|
|
|
cf->buffer = evbuffer_new();
|
|
if (cf->buffer == NULL)
|
|
fatalx("out of memory");
|
|
|
|
cf->cb = cb;
|
|
cf->data = cbdata;
|
|
|
|
if (cf->c != NULL) {
|
|
RB_INSERT(client_files, &cf->c->files, cf);
|
|
cf->c->references++;
|
|
}
|
|
|
|
return (cf);
|
|
}
|
|
|
|
void
|
|
file_free(struct client_file *cf)
|
|
{
|
|
if (--cf->references != 0)
|
|
return;
|
|
|
|
evbuffer_free(cf->buffer);
|
|
free(cf->path);
|
|
|
|
if (cf->c != NULL) {
|
|
RB_REMOVE(client_files, &cf->c->files, cf);
|
|
server_client_unref(cf->c);
|
|
}
|
|
free(cf);
|
|
}
|
|
|
|
static void
|
|
file_fire_done_cb(__unused int fd, __unused short events, void *arg)
|
|
{
|
|
struct client_file *cf = arg;
|
|
struct client *c = cf->c;
|
|
|
|
if (cf->cb != NULL && (c == NULL || (~c->flags & CLIENT_DEAD)))
|
|
cf->cb(c, cf->path, cf->error, 1, cf->buffer, cf->data);
|
|
file_free(cf);
|
|
}
|
|
|
|
void
|
|
file_fire_done(struct client_file *cf)
|
|
{
|
|
event_once(-1, EV_TIMEOUT, file_fire_done_cb, cf, NULL);
|
|
}
|
|
|
|
void
|
|
file_fire_read(struct client_file *cf)
|
|
{
|
|
struct client *c = cf->c;
|
|
|
|
if (cf->cb != NULL)
|
|
cf->cb(c, cf->path, cf->error, 0, cf->buffer, cf->data);
|
|
}
|
|
|
|
int
|
|
file_can_print(struct client *c)
|
|
{
|
|
if (c == NULL)
|
|
return (0);
|
|
if (c->session != NULL && (~c->flags & CLIENT_CONTROL))
|
|
return (0);
|
|
return (1);
|
|
}
|
|
|
|
void
|
|
file_print(struct client *c, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
file_vprint(c, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
void
|
|
file_vprint(struct client *c, const char *fmt, va_list ap)
|
|
{
|
|
struct client_file find, *cf;
|
|
struct msg_write_open msg;
|
|
|
|
if (!file_can_print(c))
|
|
return;
|
|
|
|
find.stream = 1;
|
|
if ((cf = RB_FIND(client_files, &c->files, &find)) == NULL) {
|
|
cf = file_create(c, 1, NULL, NULL);
|
|
cf->path = xstrdup("-");
|
|
|
|
evbuffer_add_vprintf(cf->buffer, fmt, ap);
|
|
|
|
msg.stream = 1;
|
|
msg.fd = STDOUT_FILENO;
|
|
msg.flags = 0;
|
|
proc_send(c->peer, MSG_WRITE_OPEN, -1, &msg, sizeof msg);
|
|
} else {
|
|
evbuffer_add_vprintf(cf->buffer, fmt, ap);
|
|
file_push(cf);
|
|
}
|
|
}
|
|
|
|
void
|
|
file_print_buffer(struct client *c, void *data, size_t size)
|
|
{
|
|
struct client_file find, *cf;
|
|
struct msg_write_open msg;
|
|
|
|
if (!file_can_print(c))
|
|
return;
|
|
|
|
find.stream = 1;
|
|
if ((cf = RB_FIND(client_files, &c->files, &find)) == NULL) {
|
|
cf = file_create(c, 1, NULL, NULL);
|
|
cf->path = xstrdup("-");
|
|
|
|
evbuffer_add(cf->buffer, data, size);
|
|
|
|
msg.stream = 1;
|
|
msg.fd = STDOUT_FILENO;
|
|
msg.flags = 0;
|
|
proc_send(c->peer, MSG_WRITE_OPEN, -1, &msg, sizeof msg);
|
|
} else {
|
|
evbuffer_add(cf->buffer, data, size);
|
|
file_push(cf);
|
|
}
|
|
}
|
|
|
|
void
|
|
file_error(struct client *c, const char *fmt, ...)
|
|
{
|
|
struct client_file find, *cf;
|
|
struct msg_write_open msg;
|
|
va_list ap;
|
|
|
|
if (!file_can_print(c))
|
|
return;
|
|
|
|
va_start(ap, fmt);
|
|
|
|
find.stream = 2;
|
|
if ((cf = RB_FIND(client_files, &c->files, &find)) == NULL) {
|
|
cf = file_create(c, 2, NULL, NULL);
|
|
cf->path = xstrdup("-");
|
|
|
|
evbuffer_add_vprintf(cf->buffer, fmt, ap);
|
|
|
|
msg.stream = 2;
|
|
msg.fd = STDERR_FILENO;
|
|
msg.flags = 0;
|
|
proc_send(c->peer, MSG_WRITE_OPEN, -1, &msg, sizeof msg);
|
|
} else {
|
|
evbuffer_add_vprintf(cf->buffer, fmt, ap);
|
|
file_push(cf);
|
|
}
|
|
|
|
va_end(ap);
|
|
}
|
|
|
|
void
|
|
file_write(struct client *c, const char *path, int flags, const void *bdata,
|
|
size_t bsize, client_file_cb cb, void *cbdata)
|
|
{
|
|
struct client_file *cf;
|
|
FILE *f;
|
|
struct msg_write_open *msg;
|
|
size_t msglen;
|
|
int fd = -1;
|
|
const char *mode;
|
|
|
|
if (strcmp(path, "-") == 0) {
|
|
cf = file_create(c, file_next_stream++, cb, cbdata);
|
|
cf->path = xstrdup("-");
|
|
|
|
fd = STDOUT_FILENO;
|
|
if (c == NULL || c->flags & CLIENT_ATTACHED) {
|
|
cf->error = EBADF;
|
|
goto done;
|
|
}
|
|
goto skip;
|
|
}
|
|
|
|
cf = file_create(c, file_next_stream++, cb, cbdata);
|
|
cf->path = file_get_path(c, path);
|
|
|
|
if (c == NULL || c->flags & CLIENT_ATTACHED) {
|
|
if (flags & O_APPEND)
|
|
mode = "ab";
|
|
else
|
|
mode = "wb";
|
|
f = fopen(cf->path, mode);
|
|
if (f == NULL) {
|
|
cf->error = errno;
|
|
goto done;
|
|
}
|
|
if (fwrite(bdata, 1, bsize, f) != bsize) {
|
|
fclose(f);
|
|
cf->error = EIO;
|
|
goto done;
|
|
}
|
|
fclose(f);
|
|
goto done;
|
|
}
|
|
|
|
skip:
|
|
evbuffer_add(cf->buffer, bdata, bsize);
|
|
|
|
msglen = strlen(cf->path) + 1 + sizeof *msg;
|
|
if (msglen > MAX_IMSGSIZE - IMSG_HEADER_SIZE) {
|
|
cf->error = E2BIG;
|
|
goto done;
|
|
}
|
|
msg = xmalloc(msglen);
|
|
msg->stream = cf->stream;
|
|
msg->fd = fd;
|
|
msg->flags = flags;
|
|
memcpy(msg + 1, cf->path, msglen - sizeof *msg);
|
|
if (proc_send(c->peer, MSG_WRITE_OPEN, -1, msg, msglen) != 0) {
|
|
free(msg);
|
|
cf->error = EINVAL;
|
|
goto done;
|
|
}
|
|
free(msg);
|
|
return;
|
|
|
|
done:
|
|
file_fire_done(cf);
|
|
}
|
|
|
|
void
|
|
file_read(struct client *c, const char *path, client_file_cb cb, void *cbdata)
|
|
{
|
|
struct client_file *cf;
|
|
FILE *f;
|
|
struct msg_read_open *msg;
|
|
size_t msglen, size;
|
|
int fd = -1;
|
|
char buffer[BUFSIZ];
|
|
|
|
if (strcmp(path, "-") == 0) {
|
|
cf = file_create(c, file_next_stream++, cb, cbdata);
|
|
cf->path = xstrdup("-");
|
|
|
|
fd = STDIN_FILENO;
|
|
if (c == NULL || c->flags & CLIENT_ATTACHED) {
|
|
cf->error = EBADF;
|
|
goto done;
|
|
}
|
|
goto skip;
|
|
}
|
|
|
|
cf = file_create(c, file_next_stream++, cb, cbdata);
|
|
cf->path = file_get_path(c, path);
|
|
|
|
if (c == NULL || c->flags & CLIENT_ATTACHED) {
|
|
f = fopen(cf->path, "rb");
|
|
if (f == NULL) {
|
|
cf->error = errno;
|
|
goto done;
|
|
}
|
|
for (;;) {
|
|
size = fread(buffer, 1, sizeof buffer, f);
|
|
if (evbuffer_add(cf->buffer, buffer, size) != 0) {
|
|
cf->error = ENOMEM;
|
|
goto done;
|
|
}
|
|
if (size != sizeof buffer)
|
|
break;
|
|
}
|
|
if (ferror(f)) {
|
|
cf->error = EIO;
|
|
goto done;
|
|
}
|
|
fclose(f);
|
|
goto done;
|
|
}
|
|
|
|
skip:
|
|
msglen = strlen(cf->path) + 1 + sizeof *msg;
|
|
if (msglen > MAX_IMSGSIZE - IMSG_HEADER_SIZE) {
|
|
cf->error = E2BIG;
|
|
goto done;
|
|
}
|
|
msg = xmalloc(msglen);
|
|
msg->stream = cf->stream;
|
|
msg->fd = fd;
|
|
memcpy(msg + 1, cf->path, msglen - sizeof *msg);
|
|
if (proc_send(c->peer, MSG_READ_OPEN, -1, msg, msglen) != 0) {
|
|
free(msg);
|
|
cf->error = EINVAL;
|
|
goto done;
|
|
}
|
|
free(msg);
|
|
return;
|
|
|
|
done:
|
|
file_fire_done(cf);
|
|
}
|
|
|
|
static void
|
|
file_push_cb(__unused int fd, __unused short events, void *arg)
|
|
{
|
|
struct client_file *cf = arg;
|
|
struct client *c = cf->c;
|
|
|
|
if (~c->flags & CLIENT_DEAD)
|
|
file_push(cf);
|
|
file_free(cf);
|
|
}
|
|
|
|
void
|
|
file_push(struct client_file *cf)
|
|
{
|
|
struct client *c = cf->c;
|
|
struct msg_write_data *msg;
|
|
size_t msglen, sent, left;
|
|
struct msg_write_close close;
|
|
|
|
msg = xmalloc(sizeof *msg);
|
|
left = EVBUFFER_LENGTH(cf->buffer);
|
|
while (left != 0) {
|
|
sent = left;
|
|
if (sent > MAX_IMSGSIZE - IMSG_HEADER_SIZE - sizeof *msg)
|
|
sent = MAX_IMSGSIZE - IMSG_HEADER_SIZE - sizeof *msg;
|
|
|
|
msglen = (sizeof *msg) + sent;
|
|
msg = xrealloc(msg, msglen);
|
|
msg->stream = cf->stream;
|
|
memcpy(msg + 1, EVBUFFER_DATA(cf->buffer), sent);
|
|
if (proc_send(c->peer, MSG_WRITE, -1, msg, msglen) != 0)
|
|
break;
|
|
evbuffer_drain(cf->buffer, sent);
|
|
|
|
left = EVBUFFER_LENGTH(cf->buffer);
|
|
log_debug("%s: file %d sent %zu, left %zu", c->name, cf->stream,
|
|
sent, left);
|
|
}
|
|
if (left != 0) {
|
|
cf->references++;
|
|
event_once(-1, EV_TIMEOUT, file_push_cb, cf, NULL);
|
|
} else if (cf->stream > 2) {
|
|
close.stream = cf->stream;
|
|
proc_send(c->peer, MSG_WRITE_CLOSE, -1, &close, sizeof close);
|
|
file_fire_done(cf);
|
|
}
|
|
free(msg);
|
|
}
|