Adding upstream version 8.32.upstream/8.32upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 867 insertions, 0 deletions

diff --git a/src/test.c b/src/test.c
new file mode 100644
index 0000000..a38ff62
--- /dev/null
+++ b/src/test.c
@@ -0,0 +1,867 @@
+/* GNU test program (ksb and mjb) */
+
+/* Modified to run with the GNU shell by bfox. */
+
+/* Copyright (C) 1987-2020 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Define TEST_STANDALONE to get the /bin/test version.  Otherwise, you get
+   the shell builtin version. */
+
+/* Without this pragma, gcc 4.6.2 20111027 mistakenly suggests that
+   the advance function might be candidate for attribute 'pure'.  */
+#if (__GNUC__ == 4 && 6 <= __GNUC_MINOR__) || 4 < __GNUC__
+# pragma GCC diagnostic ignored "-Wsuggest-attribute=pure"
+#endif
+
+#include <config.h>
+#include <stdio.h>
+#include <sys/types.h>
+
+#define TEST_STANDALONE 1
+
+#ifndef LBRACKET
+# define LBRACKET 0
+#endif
+
+/* The official name of this program (e.g., no 'g' prefix).  */
+#if LBRACKET
+# define PROGRAM_NAME "["
+#else
+# define PROGRAM_NAME "test"
+#endif
+
+#include "system.h"
+#include "quote.h"
+#include "stat-time.h"
+#include "strnumcmp.h"
+
+#include <stdarg.h>
+#include "verror.h"
+
+#if HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+
+/* Exit status for syntax errors, etc.  */
+enum { TEST_TRUE, TEST_FALSE, TEST_FAILURE };
+
+#if defined TEST_STANDALONE
+# define test_exit(val) exit (val)
+# define test_main_return(val) return val
+#else
+   static jmp_buf test_exit_buf;
+   static int test_error_return = 0;
+# define test_exit(val) test_error_return = val, longjmp (test_exit_buf, 1)
+# define test_main_return(val) test_exit (val)
+#endif /* !TEST_STANDALONE */
+
+static int pos;		/* The offset of the current argument in ARGV. */
+static int argc;	/* The number of arguments present in ARGV. */
+static char **argv;	/* The argument list. */
+
+static bool unary_operator (void);
+static bool binary_operator (bool);
+static bool two_arguments (void);
+static bool three_arguments (void);
+static bool posixtest (int);
+
+static bool expr (void);
+static bool term (void);
+static bool and (void);
+static bool or (void);
+
+static void test_syntax_error (char const *format, ...)
+     ATTRIBUTE_NORETURN;
+static void beyond (void) ATTRIBUTE_NORETURN;
+
+static void
+test_syntax_error (char const *format, ...)
+{
+  va_list ap;
+  va_start (ap, format);
+  verror (0, 0, format, ap);
+  test_exit (TEST_FAILURE);
+}
+
+/* Increment our position in the argument list.  Check that we're not
+   past the end of the argument list.  This check is suppressed if the
+   argument is false.  */
+
+static void
+advance (bool f)
+{
+  ++pos;
+
+  if (f && pos >= argc)
+    beyond ();
+}
+
+static void
+unary_advance (void)
+{
+  advance (true);
+  ++pos;
+}
+
+/*
+ * beyond - call when we're beyond the end of the argument list (an
+ *	error condition)
+ */
+static void
+beyond (void)
+{
+  test_syntax_error (_("missing argument after %s"), quote (argv[argc - 1]));
+}
+
+/* If the characters pointed to by STRING constitute a valid number,
+   return a pointer to the start of the number, skipping any blanks or
+   leading '+'.  Otherwise, report an error and exit.  */
+static char const *
+find_int (char const *string)
+{
+  char const *p;
+  char const *number_start;
+
+  for (p = string; isblank (to_uchar (*p)); p++)
+    continue;
+
+  if (*p == '+')
+    {
+      p++;
+      number_start = p;
+    }
+  else
+    {
+      number_start = p;
+      p += (*p == '-');
+    }
+
+  if (ISDIGIT (*p++))
+    {
+      while (ISDIGIT (*p))
+        p++;
+      while (isblank (to_uchar (*p)))
+        p++;
+      if (!*p)
+        return number_start;
+    }
+
+  test_syntax_error (_("invalid integer %s"), quote (string));
+}
+
+/* Find the modification time of FILE, and stuff it into *MTIME.
+   Return true if successful.  */
+static bool
+get_mtime (char const *filename, struct timespec *mtime)
+{
+  struct stat finfo;
+  bool ok = (stat (filename, &finfo) == 0);
+#ifdef lint
+  static struct timespec const zero;
+  *mtime = zero;
+#endif
+  if (ok)
+    *mtime = get_stat_mtime (&finfo);
+  return ok;
+}
+
+/* Return true if S is one of the test command's binary operators.  */
+static bool
+binop (char const *s)
+{
+  return ((STREQ (s,   "=")) || (STREQ (s,  "!=")) || (STREQ (s, "==")) ||
+          (STREQ (s,   "-nt")) ||
+          (STREQ (s, "-ot")) || (STREQ (s, "-ef")) || (STREQ (s, "-eq")) ||
+          (STREQ (s, "-ne")) || (STREQ (s, "-lt")) || (STREQ (s, "-le")) ||
+          (STREQ (s, "-gt")) || (STREQ (s, "-ge")));
+}
+
+/*
+ * term - parse a term and return 1 or 0 depending on whether the term
+ *	evaluates to true or false, respectively.
+ *
+ * term ::=
+ *	'-'('h'|'d'|'f'|'r'|'s'|'w'|'c'|'b'|'p'|'u'|'g'|'k') filename
+ *	'-'('L'|'x') filename
+ *	'-t' int
+ *	'-'('z'|'n') string
+ *	string
+ *	string ('!='|'=') string
+ *	<int> '-'(eq|ne|le|lt|ge|gt) <int>
+ *	file '-'(nt|ot|ef) file
+ *	'(' <expr> ')'
+ * int ::=
+ *	'-l' string
+ *	positive and negative integers
+ */
+static bool
+term (void)
+{
+  bool value;
+  bool negated = false;
+
+  /* Deal with leading 'not's.  */
+  while (pos < argc && argv[pos][0] == '!' && argv[pos][1] == '\0')
+    {
+      advance (true);
+      negated = !negated;
+    }
+
+  if (pos >= argc)
+    beyond ();
+
+  /* A paren-bracketed argument. */
+  if (argv[pos][0] == '(' && argv[pos][1] == '\0')
+    {
+      int nargs;
+
+      advance (true);
+
+      for (nargs = 1;
+           pos + nargs < argc && ! STREQ (argv[pos + nargs], ")");
+           nargs++)
+        if (nargs == 4)
+          {
+            nargs = argc - pos;
+            break;
+          }
+
+      value = posixtest (nargs);
+      if (argv[pos] == 0)
+        test_syntax_error (_("%s expected"), quote (")"));
+      else
+        if (argv[pos][0] != ')' || argv[pos][1])
+          test_syntax_error (_("%s expected, found %s"),
+                             quote_n (0, ")"), quote_n (1, argv[pos]));
+      advance (false);
+    }
+
+  /* Are there enough arguments left that this could be dyadic?  */
+  else if (4 <= argc - pos && STREQ (argv[pos], "-l") && binop (argv[pos + 2]))
+    value = binary_operator (true);
+  else if (3 <= argc - pos && binop (argv[pos + 1]))
+    value = binary_operator (false);
+
+  /* It might be a switch type argument.  */
+  else if (argv[pos][0] == '-' && argv[pos][1] && argv[pos][2] == '\0')
+    value = unary_operator ();
+  else
+    {
+      value = (argv[pos][0] != '\0');
+      advance (false);
+    }
+
+  return negated ^ value;
+}
+
+static bool
+binary_operator (bool l_is_l)
+{
+  int op;
+  struct stat stat_buf, stat_spare;
+  /* Is the right integer expression of the form '-l string'? */
+  bool r_is_l;
+
+  if (l_is_l)
+    advance (false);
+  op = pos + 1;
+
+  if ((op < argc - 2) && STREQ (argv[op + 1], "-l"))
+    {
+      r_is_l = true;
+      advance (false);
+    }
+  else
+    r_is_l = false;
+
+  if (argv[op][0] == '-')
+    {
+      /* check for eq, nt, and stuff */
+      if ((((argv[op][1] == 'l' || argv[op][1] == 'g')
+            && (argv[op][2] == 'e' || argv[op][2] == 't'))
+           || (argv[op][1] == 'e' && argv[op][2] == 'q')
+           || (argv[op][1] == 'n' && argv[op][2] == 'e'))
+          && !argv[op][3])
+        {
+          char lbuf[INT_BUFSIZE_BOUND (uintmax_t)];
+          char rbuf[INT_BUFSIZE_BOUND (uintmax_t)];
+          char const *l = (l_is_l
+                           ? umaxtostr (strlen (argv[op - 1]), lbuf)
+                           : find_int (argv[op - 1]));
+          char const *r = (r_is_l
+                           ? umaxtostr (strlen (argv[op + 2]), rbuf)
+                           : find_int (argv[op + 1]));
+          int cmp = strintcmp (l, r);
+          bool xe_operator = (argv[op][2] == 'e');
+          pos += 3;
+          return (argv[op][1] == 'l' ? cmp < xe_operator
+                  : argv[op][1] == 'g' ? cmp > - xe_operator
+                  : (cmp != 0) == xe_operator);
+        }
+
+      switch (argv[op][1])
+        {
+        default:
+          break;
+
+        case 'n':
+          if (argv[op][2] == 't' && !argv[op][3])
+            {
+              /* nt - newer than */
+              struct timespec lt, rt;
+              bool le, re;
+              pos += 3;
+              if (l_is_l || r_is_l)
+                test_syntax_error (_("-nt does not accept -l"), NULL);
+              le = get_mtime (argv[op - 1], &lt);
+              re = get_mtime (argv[op + 1], &rt);
+              return le && (!re || timespec_cmp (lt, rt) > 0);
+            }
+          break;
+
+        case 'e':
+          if (argv[op][2] == 'f' && !argv[op][3])
+            {
+              /* ef - hard link? */
+              pos += 3;
+              if (l_is_l || r_is_l)
+                test_syntax_error (_("-ef does not accept -l"), NULL);
+              return (stat (argv[op - 1], &stat_buf) == 0
+                      && stat (argv[op + 1], &stat_spare) == 0
+                      && stat_buf.st_dev == stat_spare.st_dev
+                      && stat_buf.st_ino == stat_spare.st_ino);
+            }
+          break;
+
+        case 'o':
+          if ('t' == argv[op][2] && '\000' == argv[op][3])
+            {
+              /* ot - older than */
+              struct timespec lt, rt;
+              bool le, re;
+              pos += 3;
+              if (l_is_l || r_is_l)
+                test_syntax_error (_("-ot does not accept -l"), NULL);
+              le = get_mtime (argv[op - 1], &lt);
+              re = get_mtime (argv[op + 1], &rt);
+              return re && (!le || timespec_cmp (lt, rt) < 0);
+            }
+          break;
+        }
+
+      /* FIXME: is this dead code? */
+      test_syntax_error (_("%s: unknown binary operator"), quote (argv[op]));
+    }
+
+  if (argv[op][0] == '='
+      && (!argv[op][1] || ((argv[op][1] == '=') && !argv[op][2])))
+    {
+      bool value = STREQ (argv[pos], argv[pos + 2]);
+      pos += 3;
+      return value;
+    }
+
+  if (STREQ (argv[op], "!="))
+    {
+      bool value = !STREQ (argv[pos], argv[pos + 2]);
+      pos += 3;
+      return value;
+    }
+
+  /* Not reached.  */
+  abort ();
+}
+
+static bool
+unary_operator (void)
+{
+  struct stat stat_buf;
+
+  switch (argv[pos][1])
+    {
+    default:
+      test_syntax_error (_("%s: unary operator expected"), quote (argv[pos]));
+      return false;
+
+      /* All of the following unary operators use unary_advance (), which
+         checks to make sure that there is an argument, and then advances
+         pos right past it.  This means that pos - 1 is the location of the
+         argument. */
+
+    case 'e':			/* file exists in the file system? */
+      unary_advance ();
+      return stat (argv[pos - 1], &stat_buf) == 0;
+
+    case 'r':			/* file is readable? */
+      unary_advance ();
+      return euidaccess (argv[pos - 1], R_OK) == 0;
+
+    case 'w':			/* File is writable? */
+      unary_advance ();
+      return euidaccess (argv[pos - 1], W_OK) == 0;
+
+    case 'x':			/* File is executable? */
+      unary_advance ();
+      return euidaccess (argv[pos - 1], X_OK) == 0;
+
+    case 'N':  /* File exists and has been modified since it was last read? */
+      {
+        unary_advance ();
+        if (stat (argv[pos - 1], &stat_buf) != 0)
+          return false;
+        struct timespec atime = get_stat_atime (&stat_buf);
+        struct timespec mtime = get_stat_mtime (&stat_buf);
+        return (timespec_cmp (mtime, atime) > 0);
+      }
+
+    case 'O':			/* File is owned by you? */
+      {
+        unary_advance ();
+        if (stat (argv[pos - 1], &stat_buf) != 0)
+          return false;
+        errno = 0;
+        uid_t euid = geteuid ();
+        uid_t NO_UID = -1;
+        return ! (euid == NO_UID && errno) && euid == stat_buf.st_uid;
+      }
+
+    case 'G':			/* File is owned by your group? */
+      {
+        unary_advance ();
+        if (stat (argv[pos - 1], &stat_buf) != 0)
+          return false;
+        errno = 0;
+        gid_t egid = getegid ();
+        gid_t NO_GID = -1;
+        return ! (egid == NO_GID && errno) && egid == stat_buf.st_gid;
+      }
+
+    case 'f':			/* File is a file? */
+      unary_advance ();
+      /* Under POSIX, -f is true if the given file exists
+         and is a regular file. */
+      return (stat (argv[pos - 1], &stat_buf) == 0
+              && S_ISREG (stat_buf.st_mode));
+
+    case 'd':			/* File is a directory? */
+      unary_advance ();
+      return (stat (argv[pos - 1], &stat_buf) == 0
+              && S_ISDIR (stat_buf.st_mode));
+
+    case 's':			/* File has something in it? */
+      unary_advance ();
+      return (stat (argv[pos - 1], &stat_buf) == 0
+              && 0 < stat_buf.st_size);
+
+    case 'S':			/* File is a socket? */
+      unary_advance ();
+      return (stat (argv[pos - 1], &stat_buf) == 0
+              && S_ISSOCK (stat_buf.st_mode));
+
+    case 'c':			/* File is character special? */
+      unary_advance ();
+      return (stat (argv[pos - 1], &stat_buf) == 0
+              && S_ISCHR (stat_buf.st_mode));
+
+    case 'b':			/* File is block special? */
+      unary_advance ();
+      return (stat (argv[pos - 1], &stat_buf) == 0
+              && S_ISBLK (stat_buf.st_mode));
+
+    case 'p':			/* File is a named pipe? */
+      unary_advance ();
+      return (stat (argv[pos - 1], &stat_buf) == 0
+              && S_ISFIFO (stat_buf.st_mode));
+
+    case 'L':			/* Same as -h  */
+      /*FALLTHROUGH*/
+
+    case 'h':			/* File is a symbolic link? */
+      unary_advance ();
+      return (lstat (argv[pos - 1], &stat_buf) == 0
+              && S_ISLNK (stat_buf.st_mode));
+
+    case 'u':			/* File is setuid? */
+      unary_advance ();
+      return (stat (argv[pos - 1], &stat_buf) == 0
+              && (stat_buf.st_mode & S_ISUID));
+
+    case 'g':			/* File is setgid? */
+      unary_advance ();
+      return (stat (argv[pos - 1], &stat_buf) == 0
+              && (stat_buf.st_mode & S_ISGID));
+
+    case 'k':			/* File has sticky bit set? */
+      unary_advance ();
+      return (stat (argv[pos - 1], &stat_buf) == 0
+              && (stat_buf.st_mode & S_ISVTX));
+
+    case 't':			/* File (fd) is a terminal? */
+      {
+        long int fd;
+        char const *arg;
+        unary_advance ();
+        arg = find_int (argv[pos - 1]);
+        errno = 0;
+        fd = strtol (arg, NULL, 10);
+        return (errno != ERANGE && 0 <= fd && fd <= INT_MAX && isatty (fd));
+      }
+
+    case 'n':			/* True if arg has some length. */
+      unary_advance ();
+      return argv[pos - 1][0] != 0;
+
+    case 'z':			/* True if arg has no length. */
+      unary_advance ();
+      return argv[pos - 1][0] == '\0';
+    }
+}
+
+/*
+ * and:
+ *	term
+ *	term '-a' and
+ */
+static bool
+and (void)
+{
+  bool value = true;
+
+  while (true)
+    {
+      value &= term ();
+      if (! (pos < argc && STREQ (argv[pos], "-a")))
+        return value;
+      advance (false);
+    }
+}
+
+/*
+ * or:
+ *	and
+ *	and '-o' or
+ */
+static bool
+or (void)
+{
+  bool value = false;
+
+  while (true)
+    {
+      value |= and ();
+      if (! (pos < argc && STREQ (argv[pos], "-o")))
+        return value;
+      advance (false);
+    }
+}
+
+/*
+ * expr:
+ *	or
+ */
+static bool
+expr (void)
+{
+  if (pos >= argc)
+    beyond ();
+
+  return or ();		/* Same with this. */
+}
+
+static bool
+one_argument (void)
+{
+  return argv[pos++][0] != '\0';
+}
+
+static bool
+two_arguments (void)
+{
+  bool value;
+
+  if (STREQ (argv[pos], "!"))
+    {
+      advance (false);
+      value = ! one_argument ();
+    }
+  else if (argv[pos][0] == '-'
+           && argv[pos][1] != '\0'
+           && argv[pos][2] == '\0')
+    {
+      value = unary_operator ();
+    }
+  else
+    beyond ();
+  return (value);
+}
+
+static bool
+three_arguments (void)
+{
+  bool value;
+
+  if (binop (argv[pos + 1]))
+    value = binary_operator (false);
+  else if (STREQ (argv[pos], "!"))
+    {
+      advance (true);
+      value = !two_arguments ();
+    }
+  else if (STREQ (argv[pos], "(") && STREQ (argv[pos + 2], ")"))
+    {
+      advance (false);
+      value = one_argument ();
+      advance (false);
+    }
+  else if (STREQ (argv[pos + 1], "-a") || STREQ (argv[pos + 1], "-o"))
+    value = expr ();
+  else
+    test_syntax_error (_("%s: binary operator expected"), quote (argv[pos+1]));
+  return (value);
+}
+
+/* This is an implementation of a Posix.2 proposal by David Korn. */
+static bool
+posixtest (int nargs)
+{
+  bool value;
+
+  switch (nargs)
+    {
+      case 1:
+        value = one_argument ();
+        break;
+
+      case 2:
+        value = two_arguments ();
+        break;
+
+      case 3:
+        value = three_arguments ();
+        break;
+
+      case 4:
+        if (STREQ (argv[pos], "!"))
+          {
+            advance (true);
+            value = !three_arguments ();
+            break;
+          }
+        if (STREQ (argv[pos], "(") && STREQ (argv[pos + 3], ")"))
+          {
+            advance (false);
+            value = two_arguments ();
+            advance (false);
+            break;
+          }
+        FALLTHROUGH;
+      case 5:
+      default:
+        if (nargs <= 0)
+          abort ();
+        value = expr ();
+    }
+
+  return (value);
+}
+
+#if defined TEST_STANDALONE
+
+void
+usage (int status)
+{
+  if (status != EXIT_SUCCESS)
+    emit_try_help ();
+  else
+    {
+      fputs (_("\
+Usage: test EXPRESSION\n\
+  or:  test\n\
+  or:  [ EXPRESSION ]\n\
+  or:  [ ]\n\
+  or:  [ OPTION\n\
+"), stdout);
+      fputs (_("\
+Exit with the status determined by EXPRESSION.\n\
+\n\
+"), stdout);
+      fputs (HELP_OPTION_DESCRIPTION, stdout);
+      fputs (VERSION_OPTION_DESCRIPTION, stdout);
+      fputs (_("\
+\n\
+An omitted EXPRESSION defaults to false.  Otherwise,\n\
+EXPRESSION is true or false and sets exit status.  It is one of:\n\
+"), stdout);
+      fputs (_("\
+\n\
+  ( EXPRESSION )               EXPRESSION is true\n\
+  ! EXPRESSION                 EXPRESSION is false\n\
+  EXPRESSION1 -a EXPRESSION2   both EXPRESSION1 and EXPRESSION2 are true\n\
+  EXPRESSION1 -o EXPRESSION2   either EXPRESSION1 or EXPRESSION2 is true\n\
+"), stdout);
+      fputs (_("\
+\n\
+  -n STRING            the length of STRING is nonzero\n\
+  STRING               equivalent to -n STRING\n\
+  -z STRING            the length of STRING is zero\n\
+  STRING1 = STRING2    the strings are equal\n\
+  STRING1 != STRING2   the strings are not equal\n\
+"), stdout);
+      fputs (_("\
+\n\
+  INTEGER1 -eq INTEGER2   INTEGER1 is equal to INTEGER2\n\
+  INTEGER1 -ge INTEGER2   INTEGER1 is greater than or equal to INTEGER2\n\
+  INTEGER1 -gt INTEGER2   INTEGER1 is greater than INTEGER2\n\
+  INTEGER1 -le INTEGER2   INTEGER1 is less than or equal to INTEGER2\n\
+  INTEGER1 -lt INTEGER2   INTEGER1 is less than INTEGER2\n\
+  INTEGER1 -ne INTEGER2   INTEGER1 is not equal to INTEGER2\n\
+"), stdout);
+      fputs (_("\
+\n\
+  FILE1 -ef FILE2   FILE1 and FILE2 have the same device and inode numbers\n\
+  FILE1 -nt FILE2   FILE1 is newer (modification date) than FILE2\n\
+  FILE1 -ot FILE2   FILE1 is older than FILE2\n\
+"), stdout);
+      fputs (_("\
+\n\
+  -b FILE     FILE exists and is block special\n\
+  -c FILE     FILE exists and is character special\n\
+  -d FILE     FILE exists and is a directory\n\
+  -e FILE     FILE exists\n\
+"), stdout);
+      fputs (_("\
+  -f FILE     FILE exists and is a regular file\n\
+  -g FILE     FILE exists and is set-group-ID\n\
+  -G FILE     FILE exists and is owned by the effective group ID\n\
+  -h FILE     FILE exists and is a symbolic link (same as -L)\n\
+  -k FILE     FILE exists and has its sticky bit set\n\
+"), stdout);
+      fputs (_("\
+  -L FILE     FILE exists and is a symbolic link (same as -h)\n\
+  -N FILE     FILE exists and has been modified since it was last read\n\
+  -O FILE     FILE exists and is owned by the effective user ID\n\
+  -p FILE     FILE exists and is a named pipe\n\
+  -r FILE     FILE exists and read permission is granted\n\
+  -s FILE     FILE exists and has a size greater than zero\n\
+"), stdout);
+      fputs (_("\
+  -S FILE     FILE exists and is a socket\n\
+  -t FD       file descriptor FD is opened on a terminal\n\
+  -u FILE     FILE exists and its set-user-ID bit is set\n\
+  -w FILE     FILE exists and write permission is granted\n\
+  -x FILE     FILE exists and execute (or search) permission is granted\n\
+"), stdout);
+      fputs (_("\
+\n\
+Except for -h and -L, all FILE-related tests dereference symbolic links.\n\
+Beware that parentheses need to be escaped (e.g., by backslashes) for shells.\n\
+INTEGER may also be -l STRING, which evaluates to the length of STRING.\n\
+"), stdout);
+      fputs (_("\
+\n\
+NOTE: Binary -a and -o are inherently ambiguous.  Use 'test EXPR1 && test\n\
+EXPR2' or 'test EXPR1 || test EXPR2' instead.\n\
+"), stdout);
+      fputs (_("\
+\n\
+NOTE: [ honors the --help and --version options, but test does not.\n\
+test treats each of those as it treats any other nonempty STRING.\n\
+"), stdout);
+      printf (USAGE_BUILTIN_WARNING, _("test and/or ["));
+      emit_ancillary_info (PROGRAM_NAME);
+    }
+  exit (status);
+}
+#endif /* TEST_STANDALONE */
+
+#if !defined TEST_STANDALONE
+# define main test_command
+#endif
+
+#define AUTHORS \
+  proper_name ("Kevin Braunsdorf"), \
+  proper_name ("Matthew Bradburn")
+
+/*
+ * [:
+ *	'[' expr ']'
+ * test:
+ *	test expr
+ */
+int
+main (int margc, char **margv)
+{
+  bool value;
+
+#if !defined TEST_STANDALONE
+  int code;
+
+  code = setjmp (test_exit_buf);
+
+  if (code)
+    return (test_error_return);
+#else /* TEST_STANDALONE */
+  initialize_main (&margc, &margv);
+  set_program_name (margv[0]);
+  setlocale (LC_ALL, "");
+  bindtextdomain (PACKAGE, LOCALEDIR);
+  textdomain (PACKAGE);
+
+  initialize_exit_failure (TEST_FAILURE);
+  atexit (close_stdout);
+#endif /* TEST_STANDALONE */
+
+  argv = margv;
+
+  if (LBRACKET)
+    {
+      /* Recognize --help or --version, but only when invoked in the
+         "[" form, when the last argument is not "]".  Use direct
+         parsing, rather than parse_long_options, to avoid accepting
+         abbreviations.  POSIX allows "[ --help" and "[ --version" to
+         have the usual GNU behavior, but it requires "test --help"
+         and "test --version" to exit silently with status 0.  */
+      if (margc == 2)
+        {
+          if (STREQ (margv[1], "--help"))
+            usage (EXIT_SUCCESS);
+
+          if (STREQ (margv[1], "--version"))
+            {
+              version_etc (stdout, PROGRAM_NAME, PACKAGE_NAME, Version, AUTHORS,
+                           (char *) NULL);
+              test_main_return (EXIT_SUCCESS);
+            }
+        }
+      if (margc < 2 || !STREQ (margv[margc - 1], "]"))
+        test_syntax_error (_("missing %s"), quote ("]"));
+
+      --margc;
+    }
+
+  argc = margc;
+  pos = 1;
+
+  if (pos >= argc)
+    test_main_return (TEST_FALSE);
+
+  value = posixtest (argc - 1);
+
+  if (pos != argc)
+    test_syntax_error (_("extra argument %s"), quote (argv[pos]));
+
+  test_main_return (value ? TEST_TRUE : TEST_FALSE);
+}