feat: ports - git port

2026-08-09 10:47:07 +02:00
parent cfb8d91442
commit 6f3cf99667
34 changed files with 2255 additions and 2 deletions
@@ -0,0 +1,49 @@
+/*
+ * <signal.h> overlay for the MontaukOS git port.
+ *
+ * The libc supplies signal()/raise()/kill() and the signal numbers; this adds
+ * the sigaction() family that git uses in a handful of places (fast-import's
+ * SIGUSR1 checkpoint handler, sigchain's SIGPIPE and SIGINT handling).
+ *
+ * MontaukOS delivers only SIGINT, and has no signal masks: a handler is
+ * either installed or it is not. sigaction() below is therefore a wrapper
+ * around signal() that honours sa_handler and ignores sa_mask and sa_flags,
+ * and the sigset_t operations manipulate a plain bitmask that nothing
+ * consults. See montauk-compat.c.
+ */
+#ifndef _MONTAUK_GIT_SIGNAL_H_
+#define _MONTAUK_GIT_SIGNAL_H_
+
+#include_next <signal.h>
+
+/* One past the highest signal number the libc names (SIGSTOP, 19). */
+#define NSIG 32
+
+typedef unsigned long sigset_t;
+
+struct sigaction {
+	sighandler_t sa_handler;
+	sigset_t     sa_mask;
+	int          sa_flags;
+	void       (*sa_restorer)(void);
+};
+
+#define SA_RESTART   0x10000000
+#define SA_NOCLDSTOP 0x00000001
+#define SA_SIGINFO   0x00000004
+#define SA_NODEFER   0x40000000
+#define SA_RESETHAND 0x80000000
+
+#define SIG_BLOCK   0
+#define SIG_UNBLOCK 1
+#define SIG_SETMASK 2
+
+int sigemptyset(sigset_t *set);
+int sigfillset(sigset_t *set);
+int sigaddset(sigset_t *set, int signum);
+int sigdelset(sigset_t *set, int signum);
+int sigismember(const sigset_t *set, int signum);
+int sigaction(int signum, const struct sigaction *act, struct sigaction *old);
+int sigprocmask(int how, const sigset_t *set, sigset_t *old);
+
+#endif /* _MONTAUK_GIT_SIGNAL_H_ */