Gary V. Vaughan reported in
http://article.gmane.org/gmane.comp.lib.gnulib.bugs/10446
that on IRIX 6.5:
test-lseek.sh fails with SIGSYS.
This works around it by disabling the corresponding portion of the test.
It's rare that program code uses a wrong 3rd argument of lseek.
Gnulib is a portability library; we spend time finding workarounds for bugs
which affect one platform but not another one. Programs use lseek usually with
a constant and symbolic third argument.
2007-06-01 Bruno Haible <[EMAIL PROTECTED]>
* tests/test-lseek.c (main): Disable test of errno for invalid third
argument.
* doc/functions/lseek.texi: Update.
--- tests/test-lseek.c 31 May 2007 01:09:04 -0000 1.3
+++ tests/test-lseek.c 2 Jun 2007 00:35:59 -0000
@@ -50,16 +50,20 @@
ASSERT (errno == EINVAL);
errno = 0;
ASSERT (lseek (0, (off_t)0, SEEK_CUR) == 2);
+#if 0 /* leads to SIGSYS on IRIX 6.5 */
ASSERT (lseek (0, (off_t)0, (SEEK_SET | SEEK_CUR | SEEK_END) + 1) == -1);
ASSERT (errno == EINVAL);
+#endif
ASSERT (lseek (1, (off_t)2, SEEK_SET) == 2);
errno = 0;
ASSERT (lseek (1, (off_t)-4, SEEK_CUR) == -1);
ASSERT (errno == EINVAL);
errno = 0;
ASSERT (lseek (1, (off_t)0, SEEK_CUR) == 2);
+#if 0 /* leads to SIGSYS on IRIX 6.5 */
ASSERT (lseek (1, (off_t)0, (SEEK_SET | SEEK_CUR | SEEK_END) + 1) == -1);
ASSERT (errno == EINVAL);
+#endif
break;
case '1': /* pipes */
--- doc/functions/lseek.texi 28 May 2007 13:59:41 -0000 1.3
+++ doc/functions/lseek.texi 2 Jun 2007 00:35:59 -0000
@@ -22,4 +22,9 @@
On platforms where @code{off_t} is a 32-bit type, @code{lseek} does not work
correctly with files larger than 2 GB. The fix is to use the
@code{AC_SYS_LARGEFILE} macro.
[EMAIL PROTECTED]
+When the third argument is invalid, POSIX says that @code{lseek} should set
[EMAIL PROTECTED] to @code{EINVAL} and return -1, but in this situation a
[EMAIL PROTECTED] signal is raised on some platforms:
+IRIX 6.5.
@end itemize
