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/* test26: lseek() Author: Jan-Mark Wams (jms@cs.vu.nl) */
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <limits.h>
#include <errno.h>
#include <time.h>
#include <stdio.h>
int max_error = 4;
#include "common.h"
#define ITERATIONS 10
#define System(cmd) if (system(cmd) != 0) printf("``%s'' failed\n", cmd)
#define Chdir(dir) if (chdir(dir) != 0) printf("Can't goto %s\n", dir)
#define Stat(a,b) if (stat(a,b) != 0) printf("Can't stat %s\n", a)
#define Mkfifo(f) if (mkfifo(f,0777)!=0) printf("Can't make fifo %s\n", f)
void test26a(void);
void test26b(void);
void test26c(void);
int main(int argc, char *argv[])
{
int i, m = 0xFFFF;
sync();
if (argc == 2) m = atoi(argv[1]);
start(26);
for (i = 0; i < 10; i++) {
if (m & 0001) test26a();
if (m & 0002) test26b();
if (m & 0004) test26c();
}
quit();
return(-1); /* Unreachable */
}
void test26a()
{ /* Test normal operation. */
int fd;
char buf[20];
int i, j;
struct stat st;
subtest = 1;
System("rm -rf ../DIR_26/*");
System("echo -n hihaho > hihaho");
if ((fd = open("hihaho", O_RDONLY)) != 3) e(1);
if (lseek(fd, (off_t) 3, SEEK_SET) != (off_t) 3) e(2);
if (read(fd, buf, 1) != 1) e(3);
if (buf[0] != 'a') e(4);
if (lseek(fd, (off_t) - 1, SEEK_END) != 5) e(5);
if (read(fd, buf, 1) != 1) e(6);
if (buf[0] != 'o') e(7);
/* Seek past end of file. */
if (lseek(fd, (off_t) 1000, SEEK_END) != 1006) e(8);
if (read(fd, buf, 1) != 0) e(9);
/* Lseek() should not extend the file. */
if (fstat(fd, &st) != 0) e(10);
if (st.st_size != (off_t) 6) e(11);
if (close(fd) != 0) e(12);
/* Probeer lseek met write. */
if ((fd = open("hihaho", O_WRONLY)) != 3) e(13);
if (lseek(fd, (off_t) 3, SEEK_SET) != (off_t) 3) e(14);
if (write(fd, "e", 1) != 1) e(15);
if (lseek(fd, (off_t) 1000, SEEK_END) != 1006) e(16);
/* Lseek() should not extend the file. */
if (fstat(fd, &st) != 0) e(17);
if (st.st_size != (off_t) 6) e(18);
if (write(fd, "e", 1) != 1) e(19);
/* Lseek() and a subsequent write should! */
if (fstat(fd, &st) != 0) e(20);
if (st.st_size != (off_t) 1007) e(21);
if (close(fd) != 0) e(22);
/* Check the file, it should start with hiheho. */
if ((fd = open("hihaho", O_RDONLY)) != 3) e(23);
if (read(fd, buf, 6) != 6) e(24);
if (strncmp(buf, "hiheho", 6) != 0) e(25);
/* The should be zero bytes and a trailing ``e''. */
if (sizeof(buf) < 10) e(26);
for (i = 1; i <= 20; i++) {
if (read(fd, buf, 10) != 10) e(27);
for (j = 0; j < 10; j++)
if (buf[j] != '\0') break;
if (j != 10) e(28);
if (lseek(fd, (off_t) 15, SEEK_CUR) != (off_t) i * 25 + 6) e(29);
}
if (lseek(fd, (off_t) 1006, SEEK_SET) != (off_t) 1006) e(30);
if (read(fd, buf, sizeof(buf)) != 1) e(31);
if (buf[0] != 'e') e(32);
if (lseek(fd, (off_t) - 1, SEEK_END) != (off_t) 1006) e(33);
if (read(fd, buf, sizeof(buf)) != 1) e(34);
if (buf[0] != 'e') e(35);
/* Closing time. */
if (close(fd) != 0) e(36);
}
void test26b()
{
int fd1, fd2, fd3;
int stat_loc;
subtest = 2;
System("rm -rf ../DIR_26/*");
/* See if childs lseek() is effecting the parent. * See also if
* lseeking() on same file messes things up. */
/* Creat a file of 11 bytes. */
if ((fd1 = open("santa", O_WRONLY | O_CREAT, 0777)) != 3) e(1);
if (write(fd1, "ho ho ho ho", 11) != 11) e(2);
if (close(fd1) != 0) e(3);
/* Open it multiple times. */
if ((fd1 = open("santa", O_RDONLY)) != 3) e(4);
if ((fd2 = open("santa", O_WRONLY)) != 4) e(5);
if ((fd3 = open("santa", O_RDWR)) != 5) e(6);
/* Set all offsets different. */
if (lseek(fd1, (off_t) 2, SEEK_SET) != 2) e(7);
if (lseek(fd2, (off_t) 4, SEEK_SET) != 4) e(8);
if (lseek(fd3, (off_t) 7, SEEK_SET) != 7) e(9);
/* Have a child process do additional offset changes. */
switch (fork()) {
case -1: printf("Can't fork\n"); break;
case 0:
alarm(20);
if (lseek(fd1, (off_t) 1, SEEK_CUR) != 3) e(10);
if (lseek(fd2, (off_t) 5, SEEK_SET) != 5) e(11);
if (lseek(fd3, (off_t) - 4, SEEK_END) != 7) e(12);
exit(0);
default:
wait(&stat_loc);
if (stat_loc != 0) e(13); /* Alarm? */
}
/* Check if the new offsets are correct. */
if (lseek(fd1, (off_t) 0, SEEK_CUR) != 3) e(14);
if (lseek(fd2, (off_t) 0, SEEK_CUR) != 5) e(15);
if (lseek(fd3, (off_t) 0, SEEK_CUR) != 7) e(16);
/* Close the file. */
if (close(fd1) != 0) e(17);
if (close(fd2) != 0) e(18);
if (close(fd3) != 0) e(19);
}
void test26c()
{ /* Test error returns. */
int fd;
int tube[2];
int i, stat_loc;
subtest = 3;
System("rm -rf ../DIR_26/*");
/* Fifo's can't be lseeked(). */
Mkfifo("fifo");
switch (fork()) {
case -1: printf("Can't fork\n"); break;
case 0:
alarm(3); /* Try for max 3 secs. */
if ((fd = open("fifo", O_RDONLY)) != 3) e(1);
if (lseek(fd, (off_t) 0, SEEK_SET) != (off_t) - 1) e(2);
if (errno != ESPIPE) e(3);
if (close(fd) != 0) e(4);
exit(0);
default:
if ((fd = open("fifo", O_WRONLY)) != 3) e(5);
wait(&stat_loc);
if (stat_loc != 0) e(6);/* Alarm? */
if (close(fd) != 0) e(7);
}
/* Pipes can't be lseeked() eigther. */
if (pipe(tube) != 0) e(8);
switch (fork()) {
case -1: printf("Can't fork\n"); break;
case 0:
alarm(3); /* Max 3 sconds wait. */
if (lseek(tube[0], (off_t) 0, SEEK_SET) != (off_t) - 1) e(9);
if (errno != ESPIPE) e(10);
if (lseek(tube[1], (off_t) 0, SEEK_SET) != (off_t) - 1) e(11);
if (errno != ESPIPE) e(12);
exit(0);
default:
wait(&stat_loc);
if (stat_loc != 0) e(14); /* Alarm? */
}
/* Close the pipe. */
if (close(tube[0]) != 0) e(15);
if (close(tube[1]) != 0) e(16);
/* Whence arument invalid. */
System("echo -n contact > file");
if ((fd = open("file", O_RDWR)) != 3) e(17);
for (i = -1000; i < 1000; i++) {
if (i == SEEK_SET || i == SEEK_END || i == SEEK_CUR) continue;
if (lseek(fd, (off_t) 0, i) != (off_t) -1) e(18);
if (errno != EINVAL) e(19);
}
if (close(fd) != 0) e(20);
/* EBADF for bad fides. */
for (i = -1000; i < 1000; i++) {
if (i >= 0 && i < OPEN_MAX) continue;
if (lseek(i, (off_t) 0, SEEK_SET) != (off_t) - 1) e(21);
if (lseek(i, (off_t) 0, SEEK_END) != (off_t) - 1) e(22);
if (lseek(i, (off_t) 0, SEEK_CUR) != (off_t) - 1) e(23);
}
}
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