unlink_test.c

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

extern int errno;

int main()
{
    FILE *fp;
    fp = fopen("test_file", "w+");
    perror("fopen returned");

    unlink("test_file");
    perror("unlink returned");

    int nchar = fprintf(fp, "Testing...");
    perror("fprintf returned");
    printf("fprintf wrote %i characters\n", nchar);

    char buffer[100];

    rewind(fp);
    perror("rewind returned");

    int last = fread(buffer, 1, nchar, fp);
    perror("fread returned");
    buffer[last] = 0;
    printf("read \"%s\" from file\n", buffer);

    fclose(fp);
    perror("fclose returned");

    return errno;
}

[ehermes@aci-service-1 test]$ ./unlink_test_c
fopen returned: Success
fprintf returned: Success
fprintf wrote 11 characters
rewind returned: Success
fread returned: Success
read "T[▒0" from file
fclose returned: Success
[ehermes@aci-service-1 test]$