[fusl] clang-format fusl

fusl/src/signal/sigset.c

 #include <signal.h>
 
-void (*sigset(int sig, void (*handler)(int)))(int)
-{
-        struct sigaction sa, sa_old;
-        sigset_t mask;
+void (*sigset(int sig, void (*handler)(int)))(int) {
+  struct sigaction sa, sa_old;
+  sigset_t mask;
 
-        sigemptyset(&mask);
-        if (sigaddset(&mask, sig) < 0)
-                return SIG_ERR;
-        
-        if (handler == SIG_HOLD) {
-                if (sigaction(sig, 0, &sa_old) < 0)
-                        return SIG_ERR;
-                if (sigprocmask(SIG_BLOCK, &mask, &mask) < 0)
-                        return SIG_ERR;
-        } else {
-                sa.sa_handler = handler;
-                sa.sa_flags = 0;
-                sigemptyset(&sa.sa_mask);
-                if (sigaction(sig, &sa, &sa_old) < 0)
-                        return SIG_ERR;
-                if (sigprocmask(SIG_UNBLOCK, &mask, &mask) < 0)
-                        return SIG_ERR;
-        }
-        return sigismember(&mask, sig) ? SIG_HOLD : sa_old.sa_handler;
+  sigemptyset(&mask);
+  if (sigaddset(&mask, sig) < 0)
+    return SIG_ERR;
+
+  if (handler == SIG_HOLD) {
+    if (sigaction(sig, 0, &sa_old) < 0)
+      return SIG_ERR;
+    if (sigprocmask(SIG_BLOCK, &mask, &mask) < 0)
+      return SIG_ERR;
+  } else {
+    sa.sa_handler = handler;
+    sa.sa_flags = 0;
+    sigemptyset(&sa.sa_mask);
+    if (sigaction(sig, &sa, &sa_old) < 0)
+      return SIG_ERR;
+    if (sigprocmask(SIG_UNBLOCK, &mask, &mask) < 0)
+      return SIG_ERR;
+  }
+  return sigismember(&mask, sig) ? SIG_HOLD : sa_old.sa_handler;
 }