syncfs.c


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#define _GNU_SOURCE

#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>

int main(int argc, char** argv)
{
	if(argc != 2)
	{
		fprintf(stderr, "usage:\n\t%s <some valid path insiead filesystem>\n", argv[0]);
		return -1;
	}
	FILE *f = fopen(argv[1], "r");
	if(!f)
	{
		fprintf(stderr, "fopen failed %s\n", strerror(errno));
		return -1;
	}
	int fd = fileno(f);
	int err = syncfs(fd);
	fclose(f);
	if(err < 0)
	{
		fprintf(stderr, "syncfs failed %s\n", strerror(errno));
		return -1;
	}
        return 0;
}