main.c

#include <stdio.h>
#include <stdlib.h>
#include "quarantine.h"

int main() {
	/* Set Quarantine */
	qtn_proc_t qp = qtn_proc_alloc();
	qtn_proc_set_identifier(qp, "com.punkeel.ohno");
	qtn_proc_set_flags(qp, QTN_FLAG_SANDBOX | QTN_FLAG_HARD);
	qtn_proc_apply_to_self(qp);
	qtn_proc_free(qp);

	FILE *fp;
	fp = fopen("test.txt", "w+");
	fprintf(fp, "This is testing for fprintf...\n");
	fputs("This is testing for fputs...\n", fp);
	fclose(fp);
	return 0;
}

Makefile

.PHONY: all clean

all: main
	./main
	@echo " "
	ls -lah@ test.txt
	@echo " "
	xattr -l test.txt

clean:
	-rm test.txt main

quarantine.h

/*
 * Sources:
 * https://github.com/dinfuehr/WebKit/blob/c2b4d6ec55d0864d311171702dc24c7c931cba95/Source/WebKit/Platform/spi/mac/QuarantineSPI.h
 * https://github.com/Anandsystem/Anand/blob/bc28ac92c4615b60a5e336a2c6df633c26ab5a09/src/quarantine/include/quarantine.h
*/

#define QTN_FLAG_SANDBOX 1
#define QTN_FLAG_HARD 2

#define qtn_proc_alloc _qtn_proc_alloc
#define qtn_proc_apply_to_self _qtn_proc_apply_to_self
#define qtn_proc_free _qtn_proc_free
#define qtn_proc_set_flags _qtn_proc_set_flags
#define qtn_proc_set_identifier _qtn_proc_set_identifier

typedef struct _qtn_proc *qtn_proc_t;

int qtn_proc_apply_to_self(qtn_proc_t);
int qtn_proc_set_flags(qtn_proc_t, uint32_t flags);
qtn_proc_t qtn_proc_alloc();
void qtn_proc_free(qtn_proc_t);
void qtn_proc_set_identifier(qtn_proc_t proc, const char* ident);