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Improve system call documentation

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This change also introduces partial faccessat() support for zipos and
makes some slight breaking changes in errno results. close() is fixed
to use `EBADF` rather than `EINVAL` and we're now using `ENOTSUP` not
`EOPNOTSUPP` to indicate that zipos doesn't support a system call yet
This commit is contained in:
Justine Tunney 2022-10-02 07:42:44 -07:00
parent 0b5f84dd20
commit ad97775370
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GPG key ID: BE714B4575D6E328
18 changed files with 273 additions and 67 deletions
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4
libc/calls/splice.c
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@ -17,6 +17,7 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/dce.h"
#include "libc/errno.h"
@ -64,6 +65,7 @@ static void splice_init(void) {
* used as both an input and output parameter for pwrite() behavior
* @return number of bytes transferred, 0 on input end, or -1 w/ errno
* @raise EBADF if `infd` or `outfd` aren't open files or append-only
* @raise ENOTSUP if `infd` or `outfd` is a zip file descriptor
* @raise ESPIPE if an offset arg was specified for a pipe fd
* @raise EINVAL if offset was given for non-seekable device
* @raise EINVAL if file system doesn't support splice()
@ -85,6 +87,8 @@ ssize_t splice(int infd, int64_t *opt_in_out_inoffset, int outfd,
(opt_in_out_outoffset &&
!__asan_is_valid(opt_in_out_outoffset, 8)))) {
rc = efault();
} else if (__isfdkind(infd, kFdZip) || __isfdkind(outfd, kFdZip)) {
rc = enotsup();
} else {
rc = sys_splice(infd, opt_in_out_inoffset, outfd, opt_in_out_outoffset,
uptobytes, flags);