Make PATH search do the right thing w/ empty path

libc/x/rmrf.c

@@ -0,0 +1,58 @@
+/*-*- 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 2021 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         │
+│ above copyright notice and this permission notice appear in all copies.      │
+│                                                                              │
+│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
+│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
+│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
+│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
+│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
+│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
+│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
+│ PERFORMANCE OF THIS SOFTWARE.                                                │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/calls/calls.h"
+#include "libc/calls/struct/dirent.h"
+#include "libc/calls/struct/stat.h"
+#include "libc/mem/mem.h"
+#include "libc/runtime/runtime.h"
+#include "libc/stdio/stdio.h"
+#include "libc/str/str.h"
+#include "libc/sysv/consts/dt.h"
+#include "libc/x/x.h"
+
+static int rmrfdir(const char *dirpath) {
+  int rc;
+  DIR *d;
+  char *path;
+  struct dirent *e;
+  if (!(d = opendir(dirpath))) return -1;
+  for (rc = 0; (e = readdir(d));) {
+    if (!strcmp(e->d_name, ".")) continue;
+    if (!strcmp(e->d_name, "..")) continue;
+    if (strchr(e->d_name, '/')) abort();
+    path = xjoinpaths(dirpath, e->d_name);
+    if ((e->d_type == DT_DIR ? rmrfdir(path) : unlink(path)) == -1) {
+      free(path);
+      closedir(d);
+      return -1;
+    }
+    free(path);
+  }
+  return closedir(d);
+}
+
+/**
+ * Recursively removes file or directory.
+ */
+int rmrf(const char *path) {
+  struct stat st;
+  if (stat(path, &st) == -1) return -1;
+  if (!S_ISDIR(st.st_mode)) return unlink(path);
+  return rmrfdir(path);
+}

libc/x/x.h

@@ -45,9 +45,15 @@ char *xstrdup(const char *) _XPNN _XMAL;
 char *xstrndup(const char *, size_t) _XPNN _XMAL;
 char *xstrcat(const char *, ...) paramsnonnull((1)) nullterminated() _XMAL;
 char *xstrmul(const char *, size_t) paramsnonnull((1)) _XMAL;
+char *xinet_ntop(int, const void *) _XPNN _XMAL;
+
+/*───────────────────────────────────────────────────────────────────────────│─╗
+│ cosmopolitan § eXtended apis » files                                     ─╬─│┼
+╚────────────────────────────────────────────────────────────────────────────│*/
+
+int rmrf(const char *);
 char *xdirname(const char *) paramsnonnull() _XMAL;
 char *xjoinpaths(const char *, const char *) paramsnonnull() _XMAL;
-char *xinet_ntop(int, const void *) _XPNN _XMAL;
 
 /*───────────────────────────────────────────────────────────────────────────│─╗
 │ cosmopolitan § eXtended apis » time                                      ─╬─│┼

libc/x/x.mk

@@ -34,6 +34,7 @@ LIBC_X_A_CHECKS =				\
 
 LIBC_X_A_DIRECTDEPS =				\
 	LIBC_CALLS				\
+	LIBC_CALLS_HEFTY			\
 	LIBC_FMT				\
 	LIBC_INTRIN				\
 	LIBC_MEM				\