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1608fbc010
http://austingroupbugs.net/view.php?id=382 requires that strerror(0) succeed, but FreeBSD reports "Unknown error: 0" and fails with EINVAL. * m4/strerror.m4 (gl_FUNC_STRERROR_SEPARATE): Expose BSD bug. * m4/strerror_r.m4 (gl_FUNC_STRERROR_R): Likewise. * lib/strerror_r.c (rpl_strerror_r): Work around it. * doc/posix-functions/strerror.texi (strerror): Document it. * doc/posix-functions/strerror_r.texi (strerror_r): Likewise. * tests/test-strerror.c (main): Strengthen test. * tests/test-strerror_r.c (main): Likewise. Signed-off-by: Eric Blake <eblake@redhat.com>
33 lines
1.0 KiB
Plaintext
33 lines
1.0 KiB
Plaintext
@node strerror
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@section @code{strerror}
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@findex strerror
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/strerror.html}
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Gnulib module: strerror
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Portability problems fixed by Gnulib:
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@itemize
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@item
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This function does not support the error values that are specified by POSIX
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but not defined by the system, on some platforms:
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OpenBSD 4.0, OSF/1 5.1, NonStop Kernel, Cygwin 1.5.x, mingw.
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@item
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This function reports failure (by setting @code{errno}) for
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@code{strerror(0)}, although POSIX requires this to leave @code{errno}
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unchanged and report success, on some platforms:
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FreeBSD 8.2
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@item
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This function fails to return a string for out-of-range integers on
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some platforms:
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HP-UX 11, IRIX 6.5, Solaris 8.
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(Some return NULL which is a POSIX violation, others return the empty
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string which is valid but not as useful); this can still cause bugs
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because most programs call @code{strerror} without setting and testing
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@code{errno}.)
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@end itemize
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