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path: root/ch8/8-04_fseek.c
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#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include "syscalls.h"
/* The C Programming Language: 2nd Edition
 *
 * Exercise 8-4: The standard library function
 *
 *     int fseek(FILE *fp, long offset, int origin)
 *
 * is identical to `lseek` except that `fp` is a file pointer instead of a file
 * descriptor and the return value is an `int` status, not a position. Write
 * `fseek`. Make sure that your `fseek` coordinates properly with the buffering
 * done for the other functions of the library.
 *
 * Notes: Page 174 covers lseek, where it describes fseek's return value as 0
 * for success and non-zero for errors.
 */

int main() {
	FILE *fp = fopen("8-04_fseek.c", "r");
	if (fp == NULL) {
		exit(1);
	}
	fseek(fp, -34L, 2);
	puts(fp->base);
	fflush(stdout);
	fclose(fp);
	return 0;
}

/* If you see this, 8-4 works! */