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Allow file ports in ‘readlink’.

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* configure.ac: Detect whether ‘readlinkat’ is defined.
* libguile/filesys.c (scm_readlink): Support file ports
  when ‘readlinkat’ exists.
  (scm_init_filesys): Provide ‘chdir-ports’ when it exists.
* doc/ref/posix.texi (File System): Document it.
* test-suite/tests/filesys.test ("readlink"): Test it.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
This commit is contained in:
Maxime Devos 2021-11-16 11:06:25 +00:00 • committed by Ludovic Courtès
parent 273bfe7510
commit 30247dc414
4 changed files with 112 additions and 12 deletions
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2
configure.ac
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@ -516,7 +516,7 @@ AC_CHECK_HEADERS([crt_externs.h])
# pipe2 - non-POSIX, found in glibc (GNU/Linux and GNU/Hurd)
#
AC_CHECK_FUNCS([DINFINITY DQNAN cexp chsize clog clog10 ctermid \
fesetround ftime ftruncate fchown fchmod fchdir \
fesetround ftime ftruncate fchown fchmod fchdir readlinkat \
getcwd geteuid getsid \
gettimeofday getuid getgid gmtime_r ioctl lstat mkdir mkdtemp mknod \
nice readlink rmdir setegid seteuid \