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/*
* @(#)bigfile2.c 1.6 2003/12/30 Connectathon Testsuite
*/
/*
* Write a holey file that walks around a couple file size edges: 2GB (31
* bits) and 4GB (32 bits). Note that this test only makes sense if the
* platform supports files with offsets bigger than 31 bits (32-bit signed
* integer).
*/
/*
* Explicitly request Large File interfaces. If we omit this, some
* implementations (e.g., Red Hat Linux 6.[12], HPUX 11.0) define
* _LFS64_LARGEFILE but don't define all the associated types.
*/
#define _LARGEFILE64_SOURCE 1
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "../tests.h"
#define HIGH_WORD(n) ((unsigned int)(((unsigned int)((n) >> 32)) & 0xffffffff))
#define LOW_WORD(n) ((unsigned int)((unsigned int)(n) & 0xffffffff))
static char usage[] = "usage: bigfile2 filename";
static char *filename;
/*
* If the native routines support 64-bit offsets, then just use them.
* Otherwise, use the Large File Summit transitional routines.
*/
#ifdef NATIVE64
#define LSEEK lseek
#define FSTAT fstat
typedef off_t offset64;
typedef struct stat stat_info;
#else
#ifdef _LFS64_LARGEFILE
#define LSEEK lseek64
#define FSTAT fstat64
typedef off64_t offset64;
typedef struct stat64 stat_info;
#endif
#endif
#if defined(_LFS64_LARGEFILE) || defined(NATIVE64)
static void check_around ARGS_((int fd, offset64 where));
#endif
#if !defined(_LFS64_LARGEFILE) && !defined(NATIVE64)
int
main(argc, argv)
int argc;
char **argv;
{
fprintf(stderr, "Skipping this test:\n");
fprintf(stderr,
"The platform doesn't appear to support 64-bit offsets.\n");
exit(0);
}
#else /* 64-bit support */
int
main(argc, argv)
int argc;
char **argv;
{
int fd;
int oflags;
/* O_SYNC is to ensure detection of problems when writing */
oflags = O_RDWR | O_CREAT | O_TRUNC | O_SYNC;
if (argc != 2) {
fprintf(stderr, "%s\n", usage);
exit(1);
}
filename = argv[1];
#ifdef _LFS64_LARGEFILE
oflags |= O_LARGEFILE;
#endif
fd = open(filename, oflags, 0666);
if (fd < 0) {
fprintf(stderr, "can't open %s: %s\n",
filename, strerror(errno));
exit(1);
}
check_around(fd, ((offset64)0x7fffffff) + 1);
if (ftruncate(fd, 0) < 0) {
perror("can't truncate");
exit(1);
}
check_around(fd, ((offset64)(0xffffffffU)) + 1);
unlink(filename);
exit(0);
}
/*
* Write 5 bytes, one at a time, starting at "where"-2. For each byte,
* verify that the file length is what we expect and that we can read the
* byte back again.
*/
static void
check_around(fd, where)
int fd;
offset64 where;
{
char buf;
int i;
offset64 start = where - 2;
int numbytes = 5;
stat_info statbuf;
char basechar = '0';
if (LSEEK(fd, start, SEEK_SET) < 0) {
fprintf(stderr, "can't do initial seek to 0x%x%08x: %s\n",
HIGH_WORD(start), LOW_WORD(start),
strerror(errno));
exit(1);
}
for (i = 0; i < numbytes; i++) {
buf = basechar + i;
if (write(fd, &buf, 1) < 0) {
fprintf(stderr, "can't write at 0x%x%08x: %s\n",
HIGH_WORD(start + i),
LOW_WORD(start + i),
strerror(errno));
exit(1);
}
if (FSTAT(fd, &statbuf) < 0) {
fprintf(stderr, "can't stat %s: %s\n",
filename, strerror(errno));
exit(1);
}
if (statbuf.st_size != start + i + 1) {
fprintf(stderr,
"expected size 0x%x%08x, got 0x%x%08x\n",
HIGH_WORD(start + i + 1),
LOW_WORD(start + i + 1),
HIGH_WORD(statbuf.st_size),
LOW_WORD(statbuf.st_size));
exit(1);
}
}
for (i = 0; i < numbytes; i++) {
if (LSEEK(fd, start + i, SEEK_SET) < 0) {
fprintf(stderr,
"can't seek to 0x%x%08x to reread file: %s\n",
HIGH_WORD(start + i),
LOW_WORD(start + i),
strerror(errno));
exit(1);
}
if (read(fd, &buf, 1) < 0) {
fprintf(stderr, "can't read at offset 0x%x%08x: %s\n",
HIGH_WORD(start + i),
LOW_WORD(start + i),
strerror(errno));
exit(1);
}
if (buf != basechar + i) {
fprintf(stderr, "expected `%c', got `%c' ",
basechar + i, buf);
fprintf(stderr, "at 0x%x%08x\n",
HIGH_WORD(start + i),
LOW_WORD(start + i));
exit(1);
}
}
}
#endif /* 64-bit support */
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