From: mookid@sigent.ru (Mikhail Zabaluev)
To: devel@linux.iplabs.ru
Subject: [devel] 64-bit fcntl
Date: Mon, 16 Oct 2000 09:52:46 +0400
Message-ID: <20001016095246.A871@localhost.localdomain> (raw)
[-- Attachment #1: Type: text/plain, Size: 511 bytes --]
Доброе время суток.
Почему fcntl в режиме поддержки 64-битных файловых смещений не хочет
выполнять операцию F_SETLKW (она же F_SETLKW64)? Версия glibc - 2.1.95,
ядра - 2.2.17. Текст тестовой программы приложен.
Интересно, что strace как будто ничего не знает о константе F_SETLKW64:
fcntl(4, 0xe /* F_??? */, 0xbffff800) = -1 EINVAL (Invalid argument)
--
Stay tuned,
MhZ mailto:mookid@sigent.ru
-----------
"If value corrupts then absolute value corrupts absolutely."
[-- Attachment #2: fcntl-test.c --]
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#define _FILE_OFFSET_BITS 64
#include <fcntl.h>
#include <stdio.h>
static struct flock lock = {
F_WRLCK,
SEEK_CUR,
0,
0,
0
};
int main() {
int fd;
fd = open("dummy_lockfile", O_WRONLY | O_CREAT, 0644);
if (fd < 0) {
perror("Cannot open dummy_lockfile");
return 1;
}
if (fcntl(fd, F_SETLKW, &lock) < 0) {
perror("F_SETLKW failed");
return 2;
}
return 0;
}
next reply other threads:[~2000-10-16 5:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-10-16 5:52 Mikhail Zabaluev [this message]
2000-10-17 9:49 ` Dmitry V. Levin
2000-10-17 21:24 ` Mikhail Zabaluev
2000-10-17 22:17 ` Dmitry V. Levin
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