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| author | Maxime Devos <maximedevos@telenet.be> | 2021-11-16 11:06:32 +0000 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2022-10-21 17:40:37 +0200 |
| commit | 19b48b1c4a0335851a51d1ac69a24b154d401fdd (patch) | |
| tree | 41be50b4b85a9305399d2347f1b9efa950eb4790 /libguile/filesys.c | |
| parent | 3a0554c60fb12857c67d2eb0bd04cf8c59014f55 (diff) | |
| download | guile-19b48b1c4a0335851a51d1ac69a24b154d401fdd.tar.gz | |
Define a Scheme binding to ‘fchmodat’ when it exists.
* configure.ac: Detect existence of fchmodat.
* libguile/filesys.c (scm_chmodat): New procedure.
* libguile/filesys.h (scm_chmodat): Make it part of the API.
* test-suite/tests/filesys.test ("chmodat"): Test it.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
Diffstat (limited to 'libguile/filesys.c')
| -rw-r--r-- | libguile/filesys.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/libguile/filesys.c b/libguile/filesys.c index fc7867fb8..1ec85d940 100644 --- a/libguile/filesys.c +++ b/libguile/filesys.c @@ -1548,6 +1548,42 @@ SCM_DEFINE (scm_chmod, "chmod", 2, 0, 0, } #undef FUNC_NAME +#ifdef HAVE_FCHMODAT +SCM_DEFINE (scm_chmodat, "chmodat", 3, 1, 0, + (SCM dir, SCM pathname, SCM mode, SCM flags), + "Like @var{chmod}, but modify the permissions of the file named\n" + "@var{pathname} in the directory referred to by the file port\n" + "@var{dir} instead.\n" + "The optional @var{flags} argument may be 0 or @code{AT_SYMLINK_NOFOLLOW},\n" + "in which case @var{pathname} is not dereferenced if it is a symbolic link,\n" + "i.e., the permissions of the symbolic link itself are modified.\n\n" + "Note that @code{AT_SYMLINK_NOFOLLOW} is not supported on all systems\n" + "and may result in @code{ENOTSUP}.") +#define FUNC_NAME s_scm_chmodat +{ + int rv; + int c_flags; + int dir_fdes; + + if (SCM_UNBNDP (flags)) + c_flags = 0; + else + c_flags = scm_to_int (flags); + + SCM_VALIDATE_OPFPORT (SCM_ARG1, dir); + dir_fdes = SCM_FPORT_FDES (dir); + + STRING_SYSCALL (pathname, c_pathname, + rv = fchmodat (dir_fdes, c_pathname, + scm_to_int (mode), c_flags)); + scm_remember_upto_here_1 (dir); + if (rv == -1) + SCM_SYSERROR; + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME +#endif + SCM_DEFINE (scm_umask, "umask", 0, 1, 0, (SCM mode), "If @var{mode} is omitted, returns a decimal number representing the current\n" |