void
dbglock_init(void)
{
if (dbglock_fd != -1)
return;
if (!dbg_enabled_p())
return;
const char envvar[] = "FB_ADB_DBGLOCK_NAME";
/* No, we can't just inherit the file descriptor. Without a
* separate file open, taking the lock won't block. */
const char* fn = getenv(envvar);
if (fn == NULL) {
const char* pfx = DEFAULT_TEMP_DIR;
char* tmpfname = xaprintf("%s/fb-adb-dbg-XXXXXX", pfx);
struct cleanup* cl = cleanup_allocate();
int tmpfd = mkostemp(tmpfname, O_CLOEXEC);
if (tmpfd != -1) {
setenv(envvar, tmpfname, 1);
cleanup_commit(cl, cleanup_dbginit, tmpfname);
dbglock_fd = tmpfd;
}
return;
}
dbglock_fd = open(fn, O_CLOEXEC | O_RDWR);
}
void
dbg_1(const char* fmt, ...)
{
if (dbg_enabled_p()) {
va_list args;
va_start(args, fmt);
dbg_internal(fmt, args);
va_end(args);
}
}
void
dbglock(void)
{
int saved_errno = errno;
if (!dbg_enabled_p())
return;
if (dbglock_fd == -1)
return;
if (dbglock_level++ == 0)
flock(dbglock_fd, LOCK_EX);
cleanup_commit(cleanup_allocate(), cleanup_dbglock, 0);
errno = saved_errno;
}
void
dbg_1(const char* fmt, ...)
{
int saved_errno = errno;
if (dbg_enabled_p()) {
SCOPED_RESLIST(rl_dbg);
dbglock();
va_list args;
fprintf(dbgout, "%s(%04d): ", prgname, getpid());
va_start(args, fmt);
vfprintf(dbgout, fmt, args);
va_end(args);
fputc('\n', dbgout);
fflush(dbgout);
}
errno = saved_errno;
}
void
dbglock(void)
{
int saved_errno = errno;
if (!dbg_enabled_p())
return;
if (dbglock_fd == -1)
return;
if (dbglock_level++ == 0) {
WITH_IO_SIGNALS_ALLOWED();
flock(dbglock_fd, LOCK_EX);
}
cleanup_commit(cleanup_allocate(), cleanup_dbglock, 0);
errno = saved_errno;
}
void
dbg_1v(const char* fmt, va_list args)
{
if (dbg_enabled_p())
dbg_internal(fmt, args);
}
