Add code

7 files changed, 183 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
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+*~
+#*#
+.wakatime-project
+*.o
+*.a
+build
+main
\ No newline at end of file
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
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+Permission to use, copy, modify, and/or distribute this software for
+any purpose with or without fee is hereby granted.
+
+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 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.
diff --git a/Makefile b/Makefile
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+++ b/Makefile
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+all: sami.o
+clean:
+	rm -f sami.o
+
+README:
+	mandoc -Tascii sami.3 | col -b > README
diff --git a/README b/README
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+++ b/README
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+SAI(3)			   Library Functions Manual			SAI(3)
+
+NAME
+     sami - simple actor model implementation
+
+SYNOPSIS
+     #include <sami.h>
+
+     int
+     SAMI_make(SAMI *actor, SAMI_Handler *handler, void *arg);
+
+     int
+     SAMI_send(SAMI *actor, void *buf, size_t length);
+
+     int
+     SAMI_recv(void *buf, size_t length);
+
+     int
+     SAMI_kill(SAMI *actor);
+
+DESCRIPTION
+     sami is a library for handling actors.  It uses fork(2) for making
+     actors, and unix(7) sockets for message delivering.
+
+RETURN VALUE
+     All functions return 0 on success, and any other number on failure.
+     Consider checking errno(7) in the latter case.
+
+SEE ALSO
+     fork(2), unix(7)
+
+AUTHORS
+     Nakidai Perumenei <nakidai@disroot.org>
+
+Linux 6.14.7-arch2-1		August 29, 2025		  Linux 6.14.7-arch2-1
diff --git a/sami.3 b/sami.3
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+++ b/sami.3
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+.Dd August 29, 2025
+.Dt SAI 3
+.Os
+.
+.Sh NAME
+.Nm sami
+.Nd simple actor model implementation
+.
+.Sh SYNOPSIS
+.
+.In sami.h
+.Ft "int"
+.Fn SAMI_make "SAMI *actor" "SAMI_Handler *handler" "void *arg"
+.
+.Ft "int"
+.Fn SAMI_send "SAMI *actor" "void *buf" "size_t length"
+.
+.Ft "int"
+.Fn SAMI_recv "void *buf" "size_t length"
+.
+.Ft "int"
+.Fn SAMI_kill "SAMI *actor"
+.
+.Sh DESCRIPTION
+.Nm
+is a library
+for handling actors.
+It uses
+.Xr fork 2
+for making actors,
+and
+.Xr unix 7
+sockets for message delivering.
+.
+.Sh RETURN VALUE
+All functions return 0 on success,
+and any other number on failure.
+Consider checking
+.Xr errno 7
+in the latter case.
+.
+.Sh SEE ALSO
+.Xr fork 2 ,
+.Xr unix 7
+.
+.Sh AUTHORS
+.An Nakidai Perumenei Aq Mt nakidai@disroot.org
diff --git a/sami.c b/sami.c
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+++ b/sami.c
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+#include "sami.h"
+
+#include <errno.h>
+#include <signal.h>
+#include <stdlib.h>
+
+#include <unistd.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+
+
+int SAMI_make(SAMI *actor, SAMI_Handler *handler, void *arg)
+{
+	int pair[2];
+
+	if (socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) == -1)
+		return 1;
+	actor->fd = pair[0];
+
+	if (!(actor->pid = fork()))
+	{
+		SAMI__fd = pair[1];
+		handler(arg);
+		exit(0);
+	}
+
+	return actor->pid == -1;
+}
+
+int SAMI_send(SAMI *actor, void *buf, size_t length)
+{
+	return send(actor->fd, buf, length, 0) == -1;
+}
+
+int SAMI_recv(void *buf, size_t length)
+{
+	return recvfrom(SAMI__fd, buf, length, 0, 0, 0) == -1;
+}
+
+int SAMI_kill(SAMI *actor)
+{
+	int res;
+
+	if (kill(actor->pid, SIGKILL))
+		return 1;
+
+	for (;;)
+		if (waitpid(actor->pid, 0, 0) == -1)
+			if (errno == EINTR)
+				continue;
+			else
+				return 1;
+		else
+			return 0;
+}
diff --git a/sami.h b/sami.h
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+++ b/sami.h
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+#ifndef __SAMI_H__
+#define __SAMI_H__
+
+#include <stddef.h>
+#include <unistd.h>
+
+extern int SAMI__fd;
+
+struct SAMI
+{
+	int fd;
+	pid_t pid;
+};
+typedef struct SAMI SAMI;
+
+typedef void SAMI_Handler(void *arg);
+
+int SAMI_make(SAMI *actor, SAMI_Handler *handler, void *arg);
+int SAMI_send(SAMI *actor, void *buf, size_t length);
+int SAMI_recv(void *buf, size_t length);
+int SAMI_kill(SAMI *actor);
+
+#endif /* __SAMI_H__ */