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Rewrite special file handling on Windows

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This change gets GNU grep working. What caused it to not work, is it
wouldn't write to an output file descriptor when its dev/ino equaled
/dev/null's. So now we invent special dev/ino values for these files
This commit is contained in:
Justine Tunney 2023-10-14 01:06:00 -07:00
parent aca2261cda
commit 2db2f40a98
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
53 changed files with 485 additions and 299 deletions
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3
libc/runtime/mprotect-nt.greg.c
View file

@ -16,6 +16,7 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/struct/sigset.internal.h"
#include "libc/intrin/directmap.internal.h"
#include "libc/nt/memory.h"
#include "libc/runtime/internal.h"
@ -26,6 +27,7 @@ textwindows int sys_mprotect_nt(void *addr, size_t size, int prot) {
unsigned i;
uint32_t op;
char *a, *b, *x, *y, *p;
BLOCK_SIGNALS;
__mmi_lock();
size = (size + 4095) & -4096;
p = addr;
@ -62,5 +64,6 @@ textwindows int sys_mprotect_nt(void *addr, size_t size, int prot) {
}
}
__mmi_unlock();
ALLOW_SIGNALS;
return rc;
}

12
libc/runtime/zipos-inode.c
View file

@ -20,23 +20,15 @@
#include "libc/limits.h"
#include "libc/runtime/zipos.internal.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/zip.internal.h"
static uint64_t __zipos_fnv(const char *s, int len) {
uint64_t hash = 0xcbf29ce484222325;
for (int i = 0; i < len; i++) {
hash *= 0x100000001b3;
hash ^= (unsigned char)s[i];
}
return hash;
}
uint64_t __zipos_inode(struct Zipos *zipos, int64_t cfile, //
const void *name, size_t namelen) {
unassert(cfile >= 0);
if (cfile == ZIPOS_SYNTHETIC_DIRECTORY) {
if (namelen && ((char *)name)[namelen - 1] == '/') --namelen;
cfile = INT64_MIN | __zipos_fnv(name, namelen);
cfile = INT64_MIN | __fnv(name, namelen);
}
return cfile;
}