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getlogin_r: Work around portability problem on OSF/1.
* m4/getlogin_r.m4 (gl_FUNC_GETLOGIN_R): Detect the OSF/1 problem. * lib/unistd.in.h (getlogin_r): Replace if REPLACE_GETLOGIN_R is set. * lib/getlogin_r.c (getlogin_r): When getlogin_r exists, invoke it and test for a truncated result. * m4/unistd_h.m4 (gl_UNISTD_H_DEFAULTS): Initialize REPLACE_GETLOGIN_R. * modules/unistd (Makefile.am): Substitute REPLACE_GETLOGIN_R. * modules/getlogin_r (Depends-on): Add memchr. * doc/posix-functions/getlogin_r.texi: Mention the OSF/1 problem.
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@@ -18,6 +18,10 @@ HP-UX 11.
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@item
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This function has an incompatible declaration on some platforms:
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Solaris 11 2010-11 (when @code{_POSIX_PTHREAD_SEMANTICS} is not defined).
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@item
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This function returns a truncated result, instead of failing with error code
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@code{ERANGE}, when the buffer is not large enough, on some platforms:
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OSF/1 5.1.
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@end itemize
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Portability problems not fixed by Gnulib:
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