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gpgscm: Expose seek and associated constants. 

* tests/gpgscm/ffi.c (do_seek): New function.
(ffi_init): Expose 'seek' and 'SEEK_{SET,CUR,END}'.
* tests/gpgscm/lib.scm: Document the new function.

Signed-off-by: Justus Winter <justus@g10code.com>
This commit is contained in:
Justus Winter 2016-11-08 15:11:12 +01:00
parent d4454837cd
commit 591d61d80f
2 changed files with 27 additions and 0 deletions
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19
tests/gpgscm/ffi.c
View File

@ -325,6 +325,21 @@ do_close (scheme *sc, pointer args)
FFI_RETURN_ERR (sc, close (fd) == 0 ? 0 : gpg_error_from_syserror ());
}
static pointer
do_seek (scheme *sc, pointer args)
{
FFI_PROLOG ();
int fd;
off_t offset;
int whence;
FFI_ARG_OR_RETURN (sc, int, fd, number, args);
FFI_ARG_OR_RETURN (sc, off_t, offset, number, args);
FFI_ARG_OR_RETURN (sc, int, whence, number, args);
FFI_ARGS_DONE_OR_RETURN (sc, args);
FFI_RETURN_ERR (sc, lseek (fd, offset, whence) == (off_t) -1
? gpg_error_from_syserror () : 0);
}
static pointer
do_mkdtemp (scheme *sc, pointer args)
{
@ -1309,6 +1324,9 @@ ffi_init (scheme *sc, const char *argv0, const char *scriptname,
ffi_define_constant (sc, STDIN_FILENO);
ffi_define_constant (sc, STDOUT_FILENO);
ffi_define_constant (sc, STDERR_FILENO);
ffi_define_constant (sc, SEEK_SET);
ffi_define_constant (sc, SEEK_CUR);
ffi_define_constant (sc, SEEK_END);
ffi_define_function (sc, sleep);
ffi_define_function (sc, usleep);
@ -1320,6 +1338,7 @@ ffi_init (scheme *sc, const char *argv0, const char *scriptname,
ffi_define_function (sc, open);
ffi_define_function (sc, fdopen);
ffi_define_function (sc, close);
ffi_define_function (sc, seek);
ffi_define_function_name (sc, "_mkdtemp", mkdtemp);
ffi_define_function (sc, unlink);
ffi_define_function (sc, unlink_recursively);

8
tests/gpgscm/lib.scm
View File

@ -204,6 +204,14 @@
;; Libc functions.
;;
;; Change the read/write offset.
(ffi-define (seek fd offset whence))
;; Constants for WHENCE.
(ffi-define SEEK_SET)
(ffi-define SEEK_CUR)
(ffi-define SEEK_END)
;; Get our process id.
(ffi-define (getpid))