Emulate ENOTDIR better

libc/runtime/cocmd.c

@@ -27,7 +27,6 @@
 #include "libc/fmt/magnumstrs.internal.h"
 #include "libc/intrin/_getenv.internal.h"
 #include "libc/intrin/bits.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/weaken.h"
 #include "libc/macros.internal.h"
 #include "libc/runtime/runtime.h"

libc/runtime/cosmo2.c

@@ -21,7 +21,6 @@
 #include "libc/calls/syscall-sysv.internal.h"
 #include "libc/dce.h"
 #include "libc/errno.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/limits.h"
 #include "libc/macros.internal.h"

libc/runtime/getlogin_r.c

@@ -18,7 +18,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/syscall_support-nt.internal.h"
 #include "libc/dce.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/macros.internal.h"
 #include "libc/nt/accounting.h"

libc/runtime/hook.greg.c

@@ -18,7 +18,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "ape/sections.internal.h"
 #include "libc/calls/struct/sigset.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/limits.h"
 #include "libc/macros.internal.h"
 #include "libc/runtime/runtime.h"

libc/runtime/zipos-access.c

@@ -40,7 +40,7 @@ int __zipos_access(struct ZiposUri *name, int amode) {
 
   ssize_t cf;
   if ((cf = __zipos_find(z, name)) == -1) {
-    return enoent();
+    return -1;
   }
 
   int mode = GetZipCfileMode(z->map + cf);

libc/runtime/zipos-find.c

@@ -1,7 +1,7 @@
 /*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
 │vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
 ╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
+│ Copyright 2023 Justine Alexandra Roberts Tunney                              │
 │                                                                              │
 │ Permission to use, copy, modify, and/or distribute this software for         │
 │ any purpose with or without fee is hereby granted, provided that the         │
@@ -17,10 +17,17 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/runtime/zipos.internal.h"
+#include "libc/str/str.h"
+#include "libc/sysv/consts/s.h"
+#include "libc/sysv/errfuns.h"
 #include "libc/zip.internal.h"
 
-ssize_t __zipos_find(struct Zipos *zipos, struct ZiposUri *name) {
-  if (!name->len) {
+static ssize_t __zipos_scan(struct Zipos *zipos, struct ZiposUri *name) {
+  size_t len = name->len;
+  if (len && name->path[len - 1] == '/') {
+    --len;
+  }
+  if (!len) {
     return ZIPOS_SYNTHETIC_DIRECTORY;
   }
   bool found_subfile = false;
@@ -29,12 +36,11 @@ ssize_t __zipos_find(struct Zipos *zipos, struct ZiposUri *name) {
   for (size_t i = 0; i < n; ++i, c += ZIP_CFILE_HDRSIZE(zipos->map + c)) {
     const char *zname = ZIP_CFILE_NAME(zipos->map + c);
     size_t zsize = ZIP_CFILE_NAMESIZE(zipos->map + c);
-    if ((name->len == zsize ||
-         (name->len + 1 == zsize && zname[name->len] == '/')) &&
-        !memcmp(name->path, zname, name->len)) {
+    if ((len == zsize || (len + 1 == zsize && zname[len] == '/')) &&
+        !memcmp(name->path, zname, len)) {
       return c;
-    } else if (name->len + 1 < zsize && zname[name->len] == '/' &&
-               !memcmp(name->path, zname, name->len)) {
+    } else if (len + 1 < zsize && zname[len] == '/' &&
+               !memcmp(name->path, zname, len)) {
       found_subfile = true;
     }
   }
@@ -43,3 +49,28 @@ ssize_t __zipos_find(struct Zipos *zipos, struct ZiposUri *name) {
   }
   return -1;
 }
+
+// support code for open(), stat(), and access()
+ssize_t __zipos_find(struct Zipos *zipos, struct ZiposUri *name) {
+  ssize_t cf;
+  if ((cf = __zipos_scan(zipos, name)) == -1) {
+    // test if parent component exists that isn't a directory
+    char *p;
+    while ((p = memrchr(name->path, '/', name->len))) {
+      name->path[name->len = p - name->path] = 0;
+      if ((cf = __zipos_scan(zipos, name)) != -1 &&
+          cf != ZIPOS_SYNTHETIC_DIRECTORY &&
+          !S_ISDIR(GetZipCfileMode(zipos->map + cf))) {
+        return enotdir();
+      }
+    }
+    return enoent();
+  }
+  // test if we're opening "foo/" and "foo" isn't a directory
+  if (cf != ZIPOS_SYNTHETIC_DIRECTORY &&  //
+      name->len && name->path[name->len - 1] == '/' &&
+      !S_ISDIR(GetZipCfileMode(zipos->map + cf))) {
+    return enotdir();
+  }
+  return cf;
+}

libc/runtime/zipos-get.c

@@ -21,7 +21,6 @@
 #include "libc/calls/struct/stat.h"
 #include "libc/fmt/conv.h"
 #include "libc/intrin/cmpxchg.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/promises.internal.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/macros.internal.h"

libc/runtime/zipos-normpath.c

@@ -21,8 +21,7 @@
 // normalizes zip filesystem path w/ overlapping strlcpy() style api
 // zip paths look like relative paths, but they're actually absolute
 // with respect to the archive; so similar to how /../etc would mean
-// /etc, we'd translate that here to "etc". when storing assets in a
-// zip archive, callers should append trailing slash for directories
+// /etc, we'd translate that here to "etc", and "etc/" slash is kept
 // returns strlen of 𝑑; returns 𝑛 when insufficient buffer available
 // nul terminator is guaranteed if n>0. it's fine if 𝑑 and 𝑠 overlap
 // test vectors for this algorithm in: test/libc/stdio/zipdir_test.c
@@ -49,8 +48,6 @@ size_t __zipos_normpath(char *d, const char *s, size_t n) {
   }
   // if we didn't overflow
   if (p < e) {
-    // trim trailing slashes and add nul terminator
-    while (p > d && p[-1] == '/') --p;
     *p = '\0';
   } else {
     // force nul-terminator to exist if possible

libc/runtime/zipos-open.c

@@ -209,7 +209,7 @@ static int __zipos_open_impl(struct ZiposUri *name, int flags) {
   }
   ssize_t cf;
   if ((cf = __zipos_find(zipos, name)) == -1) {
-    return enoent();
+    return -1;
   }
   if (flags & O_EXCL) {
     return eexist();

libc/runtime/zipos-stat.c

@@ -23,14 +23,14 @@
 /**
  * Reads file metadata from αcτµαlly pδrταblε εxεcµταblε object store.
  *
- * @param uri is obtained via __zipos_parseuri()
+ * @param name is obtained via __zipos_parseuri()
  * @asyncsignalsafe
  */
 int __zipos_stat(struct ZiposUri *name, struct stat *st) {
   ssize_t cf;
   struct Zipos *zipos;
   if (!(zipos = __zipos_get())) return enoexec();
-  if ((cf = __zipos_find(zipos, name)) == -1) return enoent();
+  if ((cf = __zipos_find(zipos, name)) == -1) return -1;
   if (__zipos_stat_impl(zipos, cf, st)) return -1;
   st->st_ino = __zipos_inode(zipos, cf, name->path, name->len);
   return 0;

libc/runtime/zipos.internal.h

@@ -44,8 +44,8 @@ void __zipos_unlock(void);
 void __zipos_free(struct ZiposHandle *);
 struct Zipos *__zipos_get(void) pureconst;
 size_t __zipos_normpath(char *, const char *, size_t);
-ssize_t __zipos_parseuri(const char *, struct ZiposUri *);
 ssize_t __zipos_find(struct Zipos *, struct ZiposUri *);
+ssize_t __zipos_parseuri(const char *, struct ZiposUri *);
 uint64_t __zipos_inode(struct Zipos *, int64_t, const void *, size_t);
 int __zipos_open(struct ZiposUri *, int);
 int __zipos_access(struct ZiposUri *, int);