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Improve fcntl(F_{SET,GET}FL) implementation (#32)

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This commit is contained in:
Justine Tunney 2021-01-30 13:09:11 -08:00
parent 4072e40bb8
commit 39bb91fc44
2 changed files with 78 additions and 18 deletions
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28
libc/calls/fcntl-nt.c
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@ -16,6 +16,7 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/nt/enum/accessmask.h"
#include "libc/nt/enum/fileflagandattributes.h"
@ -31,24 +32,15 @@ textwindows int fcntl$nt(int fd, int cmd, unsigned arg) {
if (__isfdkind(fd, kFdFile) || __isfdkind(fd, kFdSocket)) {
switch (cmd) {
case F_GETFL:
return g_fds.p[fd].flags;
return g_fds.p[fd].flags & (O_ACCMODE | O_APPEND | O_ASYNC | O_DIRECT |
O_NOATIME | O_NONBLOCK);
case F_SETFL:
if (ReOpenFile(
g_fds.p[fd].handle,
(arg & O_APPEND)
? kNtFileAppendData
: (arg & O_ACCMODE) == O_RDONLY
? kNtGenericExecute | kNtFileGenericRead
: kNtGenericExecute | kNtFileGenericRead |
kNtFileGenericWrite,
(arg & O_EXCL) == O_EXCL
? kNtFileShareExclusive
: kNtFileShareRead | kNtFileShareWrite | kNtFileShareDelete,
kNtFileAttributeNotContentIndexed | kNtFileAttributeNormal)) {
return (g_fds.p[fd].flags = arg);
} else {
return __winerr();
}
/*
* - O_APPEND doesn't appear to be tunable at cursory glance
* - O_NONBLOCK might require we start doing all i/o in threads
* - O_DSYNC / O_RSYNC / O_SYNC maybe if we fsync() everything
*/
return einval();
case F_GETFD:
if (g_fds.p[fd].flags & O_CLOEXEC) {
return FD_CLOEXEC;
@ -64,7 +56,7 @@ textwindows int fcntl$nt(int fd, int cmd, unsigned arg) {
return 0;
}
default:
return 0; /* TODO(jart): Implement me. */
return einval();
}
} else {
return ebadf();