core-agent-linux/qubes-rpc/qfile-agent.c
Rusty Bird 8da7c7af60
qfile-agent.c: exit on EPIPE after gui progress write
The qvm-{copy,move}-to-vm.{gnome,kde} cancel buttons didn't actually
cancel, because qfile-agent ignored EPIPE and - via qfile_pack_init() -
SIGPIPE. So it never noticed when the local PROGRESS_TYPE=gui reader had
shut down.
2018-07-25 12:44:52 +00:00

121 lines
3.2 KiB
C

#define _GNU_SOURCE
#include <dirent.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <signal.h>
#include <fcntl.h>
#include <malloc.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <gui-fatal.h>
#include <libqubes-rpc-filecopy.h>
enum {
PROGRESS_FLAG_NORMAL,
PROGRESS_FLAG_INIT,
PROGRESS_FLAG_DONE
};
void do_notify_progress(long long total, int flag)
{
const char *du_size_env = getenv("FILECOPY_TOTAL_SIZE");
const char *progress_type_env = getenv("PROGRESS_TYPE");
const char *saved_stdout_env = getenv("SAVED_FD_1");
int ignore;
if (!progress_type_env)
return;
if (!strcmp(progress_type_env, "console") && du_size_env) {
char msg[256];
snprintf(msg, sizeof(msg), "sent %lld/%lld KB\r",
total / 1024, strtoull(du_size_env, NULL, 0));
ignore = write(2, msg, strlen(msg));
if (flag == PROGRESS_FLAG_DONE)
ignore = write(2, "\n", 1);
if (ignore < 0) {
/* silence gcc warning */
}
}
if (!strcmp(progress_type_env, "gui") && saved_stdout_env) {
char msg[256];
snprintf(msg, sizeof(msg), "%lld\n", total);
if (write(strtoul(saved_stdout_env, NULL, 0), msg, strlen(msg)) == -1
&& errno == EPIPE)
exit(32);
}
}
void notify_progress(int size, int flag)
{
static long long total = 0;
static long long prev_total = 0;
total += size;
if (total > prev_total + PROGRESS_NOTIFY_DELTA
|| (flag != PROGRESS_FLAG_NORMAL)) {
// check for possible error from qfile-unpacker; if error occured,
// exit() will be called, so don't bother with current state
// (notify_progress can be called as callback from copy_file())
if (flag == PROGRESS_FLAG_NORMAL)
wait_for_result();
do_notify_progress(total, flag);
prev_total = total;
}
}
char *get_abs_path(const char *cwd, const char *pathname)
{
char *ret;
if (pathname[0] == '/')
return strdup(pathname);
if (asprintf(&ret, "%s/%s", cwd, pathname) < 0)
return NULL;
else
return ret;
}
int main(int argc, char **argv)
{
int i;
char *entry;
char *cwd;
char *sep;
int ignore_symlinks = 0;
qfile_pack_init();
register_error_handler(qfile_gui_fatal);
register_notify_progress(&notify_progress);
notify_progress(0, PROGRESS_FLAG_INIT);
cwd = getcwd(NULL, 0);
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "--ignore-symlinks")==0) {
ignore_symlinks = 1;
continue;
}
entry = get_abs_path(cwd, argv[i]);
do {
sep = rindex(entry, '/');
if (!sep)
gui_fatal
("Internal error: nonabsolute filenames not allowed");
*sep = 0;
} while (sep[1] == 0);
if (entry[0] == 0) {
if (chdir("/") < 0) {
gui_fatal("Internal error: chdir(\"/\") failed?!");
}
} else if (chdir(entry))
gui_fatal("chdir to %s", entry);
do_fs_walk(sep + 1, ignore_symlinks);
free(entry);
}
notify_end_and_wait_for_result();
notify_progress(0, PROGRESS_FLAG_DONE);
return 0;
}