Do some work on redbean

- Rewrite Slurp() API to be like string.sub()
- Introduce a new Barf() API for creating files
- Update Redbean `-S` sandbox flag to do unveiling

test/libc/calls/pread_test.c

@@ -29,13 +29,13 @@ __attribute__((__constructor__)) static void init(void) {
   errno = 0;
 }
 
-TEST(dog, testReadPastEof_returnsZero) {
+TEST(pread, testReadPastEof_returnsZero) {
   EXPECT_NE(-1, (fd = open("a", O_RDWR | O_CREAT | O_TRUNC, 0644)));
   EXPECT_EQ(0, pread(fd, buf, 8, 0));
   EXPECT_EQ(0, close(fd));
 }
 
-TEST(dog, testReadOverlapsEof_returnsShortNumber) {
+TEST(pread, testReadOverlapsEof_returnsShortNumber) {
   EXPECT_NE(-1, (fd = open("b", O_RDWR | O_CREAT | O_TRUNC, 0644)));
   EXPECT_EQ(4, pwrite(fd, buf, 4, 0));
   EXPECT_EQ(4, pread(fd, buf, 8, 0));

test/libc/calls/pwrite_test.c

@@ -0,0 +1,39 @@
+/*-*- 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 2022 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/stat.h"
+#include "libc/sysv/consts/o.h"
+#include "libc/testlib/testlib.h"
+
+char buf[8];
+struct stat st;
+char testlib_enable_tmp_setup_teardown;
+
+__attribute__((__constructor__)) static void init(void) {
+  pledge("stdio rpath wpath cpath fattr", 0);
+  errno = 0;
+}
+
+TEST(pwrite, testWritePastEof_extendsFile) {
+  EXPECT_SYS(0, 3, creat("foo", 0644));
+  EXPECT_SYS(0, 8, pwrite(3, buf, 8, 100));
+  EXPECT_SYS(0, 0, fstat(3, &st));
+  EXPECT_EQ(108, st.st_size);
+  EXPECT_SYS(0, 0, close(3));
+}

test/tool/net/slurp_test.lua

@@ -0,0 +1,50 @@
+-- Copyright 2022 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.
+
+tmpdir = "o/tmp/lunix_test.%d" % {unix.getpid()}
+
+local function Path(name)
+   return tmpdir .. '/' .. name
+end
+
+local function SlurpTest()
+
+   data = 'abc123' * 5000
+   assert(Barf(Path('foo'), data))
+   assert(assert(Slurp(Path('foo'))) == data)
+   assert(assert(Slurp(Path('foo'), 2, 3)) == 'bc')
+   assert(assert(Slurp(Path('foo'), 2)) == data:sub(2))
+   assert(assert(Slurp(Path('foo'), 2, 1)) == data:sub(2, 1))
+   assert(assert(Slurp(Path('foo'), 2, 2)) == data:sub(2, 2))
+   assert(assert(Slurp(Path('foo'), 1, 2)) == data:sub(1, 2))
+   assert(assert(Slurp(Path('foo'), -3, -1)) == data:sub(-3, -1))
+
+   assert(Barf(Path('foo'), 'XX', 0, 0, 3))
+   assert(assert(Slurp(Path('foo'), 1, 6)) == 'abXX23')
+
+end
+
+local function main()
+   assert(unix.makedirs(tmpdir))
+   ok, err = pcall(SlurpTest)
+   if ok then
+      assert(unix.rmrf(tmpdir))
+   else
+      print(err)
+      error('SlurpTest failed (%s)' % {tmpdir})
+   end
+end
+
+main()