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These days, most systems already declare getgroups with gid_t*. But in the rare case that GETGROUPS_T is still int but gid_t is short, the user should not have to uglify their code; let the replacement hide all the magic. Tested by configuring with ac_cv_type_getgroups=uint64_t on a platform with 32-bit gid_t, and ignoring compiler warnings. However, since we don't replace setgroups, the GETGROUPS_T workaround is still needed there for now. * lib/getgroups.c (rpl_getgroups): Change signature. Copy array an element at a time if GETGROUPS_T is wrong size. * lib/getugroups.h (getugroups): Change signature. * lib/unistd.in.h (getgroups): Likewise. * m4/getgroups.m4 (gl_FUNC_GETGROUPS): Use replacement if signature needs fixing. * m4/getugroups.m4 (gl_GETUGROUPS): No longer need AC_TYPE_GETGROUPS. * modules/group-member (Depends-on): Add getgroups. * lib/group-member.c (group_info, get_group_info): Use gid_t. (group_member): Rely on getgroups replacement. * lib/getugroups.c (getugroups): Use gid_t. * tests/test-getgroups.c (main): Likewise. * NEWS: Mention the signature change. * doc/posix-functions/getgroups.texi (getgroups): Mention the problem with signature. * doc/glibc-functions/setgroups.texi (setgroups): Mention that GETGROUPS_T is still useful for setgroups. Signed-off-by: Eric Blake <ebb9@byu.net>
23 lines
597 B
Plaintext
23 lines
597 B
Plaintext
@node setgroups
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@subsection @code{setgroups}
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@findex setgroups
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Gnulib module: ---
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Portability problems fixed by Gnulib:
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@itemize
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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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@item
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This function is missing on some platforms:
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AIX 5.1, mingw, Interix 3.5, BeOS.
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@item
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On very old systems, this function operated on an array of @samp{int},
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even though that was a different size than an array of @samp{gid_t};
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you can use autoconf's AC_TYPE_GETGROUPS to set @code{GETGROUPS_T} to
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the appropriate size (since @code{getgroups} and @code{setgroups}
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share the same bug).
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@end itemize
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