kc3-lang/gnulib/doc/posix-functions/unsetenv.texi
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Hash : 17357997
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Date : 2025-07-16T16:57:06
doc: Use @code around errno constants. * doc/posix-functions/mkfifoat.texi: Use @code for errno constants instead of @samp. * doc/posix-functions/mknodat.texi: Likewise. * doc/posix-functions/setenv.texi: Likewise. * doc/posix-functions/symlinkat.texi: Likewise. * doc/posix-functions/unsetenv.texi: Likewise. * doc/glibc-functions/sethostname.texi: Use @code around errno constants. * doc/posix-functions/chmod.texi: Likewise. * doc/posix-functions/posix_fallocate.texi: Likewise. * doc/posix-functions/ptsname_r.texi: Likewise.
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doc/posix-functions/unsetenv.texi
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@node unsetenv @subsection @code{unsetenv} @findex unsetenv POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9799919799/functions/unsetenv.html} Gnulib module: unsetenv @mindex unsetenv Portability problems fixed by Gnulib: @itemize @item This function is missing on some platforms: AIX 5.1, HP-UX 11.23, Solaris 9, mingw, MSVC 14. @item This function has the return type @samp{void} instead of @samp{int} on some platforms: FreeBSD 6.0, NetBSD 1.6, OpenBSD 3.8. @item On some platforms, this function does not fail with @code{EINVAL} when passed an empty string or a string containing @samp{=}: FreeBSD 6.0, NetBSD 1.6, OpenBSD 4.7. @item This function removes only the first value association for the given environment variable, not all of them, on some platforms: Solaris 11.4, Haiku. @end itemize Portability problems not fixed by Gnulib: @itemize @item Older versions of POSIX required that @code{unsetenv(NULL)} gracefully fail with @code{EINVAL}, but not all implementations guarantee this, and the requirement was removed. @end itemize