From 0388142877654e7b0a420f8e63b4a3153644aee4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rodrigo=20G=2E=20L=C3=B3pez?= <r.gonzalez@telfy.com>
Date: Thu, 14 Oct 2021 14:04:54 +0200
Subject: Initial commit.

---
 Makefile | 32 ++++++++++++++++++++++++++++++++
 main.c   | 35 +++++++++++++++++++++++++++++++++++
 2 files changed, 67 insertions(+)
 create mode 100644 Makefile
 create mode 100644 main.c

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..373aef4
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,32 @@
+CC=cc
+CFLAGS=-Wall -Wno-missing-braces -Wno-parentheses -Wno-switch -Wno-pointer-to-int-cast -fno-diagnostics-color -ggdb -c -O2
+LDFLAGS=-static
+O=o
+BIN=$(HOME)/bin
+
+TARG=paramedic
+OFILES=\
+	main.$O\
+
+.PHONY: all clean
+all: $(TARG)
+
+%.$O: %.c
+	$(CC) $(CFLAGS) $<
+
+$(OFILES): $(HFILES)
+
+$(TARG): $(OFILES)
+	$(CC) -o $@ $(OFILES) $(LIBS) $(LDFLAGS)
+
+install: $(TARG)
+	cp $(TARG) $(BIN)/
+
+uninstall:
+	rm -f $(BIN)/$(TARG)
+
+man:
+	groff -man $(TARG).8.man | ps2pdf - >$(TARG).8.pdf
+
+clean:
+	rm $(TARG) *.o *.pdf
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..6b6e15a
--- /dev/null
+++ b/main.c
@@ -0,0 +1,35 @@
+#define _GNU_SOURCE
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+int
+main(int argc, char *argv[])
+{
+	char buf[1024];
+	int mfd, n, cs;
+
+	mfd = memfd_create("", MFD_CLOEXEC);
+	if(mfd < 0)
+		exit(1);
+
+	while((n = read(0, buf, sizeof buf)) > 0)
+		if(write(mfd, buf, n) != n)
+			exit(2);
+
+	switch(fork()){
+	case -1:
+		exit(3);
+	case 0:
+		snprintf(buf, sizeof buf, "/proc/self/fd/%d", mfd);
+		execl(buf, "", NULL);
+		exit(66);
+	default:
+		wait(&cs);
+	}
+	exit(cs);
+}
-- 
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