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/*
* @(#)negseek.c 1.2 98/10/26 Connectathon Testsuite
* 1.3 Lachman ONC Test Suite source
*
* test seek to negative offset
*/
#if defined (DOS) || defined (WIN32)
#define DOSorWIN32
#include "../tests.h"
#endif
#ifndef DOSorWIN32
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#if defined(SVR3) || defined(SVR4)
#include <fcntl.h>
#else
#include <sys/file.h>
#endif
#endif /* DOSorWIN32 */
main(argc, argv)
int argc;
char *argv[];
{
int fd;
long i;
char buf[8192];
#ifdef WIN32
/*
* The Windows _llseek command returns invalid parameter when this
* test is run. However, it appears to work correctly under DOS.
*/
fprintf(stderr, "This Test Not Executable on Windows\n");
exit(1);
#endif
if (argc != 2) {
fprintf(stderr, "usage: negseek filename\n");
exit(1);
}
fd = open(argv[1], O_CREAT|O_RDONLY, 0666);
if (fd == -1) {
perror(argv[1]);
exit(1);
}
for (i = 0L; i > -10240L; i -= 1024L) {
if (lseek(fd, i, 0) == -1L) {
perror("lseek");
close(fd);
unlink(argv[1]);
exit(0);
}
if (read(fd, buf, sizeof buf) == -1) {
perror("read");
close(fd);
unlink(argv[1]);
exit(0);
}
}
close(fd);
unlink(argv[1]);
exit(1);
}
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