Add bash 5.2 to third_party

third_party/bash/getopt.c

@@ -0,0 +1,355 @@
+/* getopt.c - getopt for Bash.  Used by the getopt builtin. */
+
+/* Copyright (C) 1993-2009 Free Software Foundation, Inc.
+
+   This file is part of GNU Bash, the Bourne Again SHell.
+
+   Bash 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.
+
+   Bash 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 Bash.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "config.h"
+
+#if defined (HAVE_UNISTD_H)
+#  ifdef _MINIX
+#    include <sys/types.h>
+#  endif
+#  include <unistd.h>
+#endif
+
+#include <stdio.h>
+#include "memalloc.h"
+#include "bashintl.h"
+#include "shell.h"
+#include "getopt.h"
+
+/* For communication from `sh_getopt' to the caller.
+   When `sh_getopt' finds an option that takes an argument,
+   the argument value is returned here. */
+char *sh_optarg = 0;
+
+/* Index in ARGV of the next element to be scanned.
+   This is used for communication to and from the caller
+   and for communication between successive calls to `sh_getopt'.
+
+   On entry to `sh_getopt', zero means this is the first call; initialize.
+
+   When `sh_getopt' returns EOF, this is the index of the first of the
+   non-option elements that the caller should itself scan.
+
+   Otherwise, `sh_optind' communicates from one call to the next
+   how much of ARGV has been scanned so far.  */
+
+/* XXX 1003.2 says this must be 1 before any call.  */
+int sh_optind = 0;
+
+/* Index of the current argument. */
+static int sh_curopt;
+
+/* The next char to be scanned in the option-element
+   in which the last option character we returned was found.
+   This allows us to pick up the scan where we left off.
+
+   If this is zero, or a null string, it means resume the scan
+   by advancing to the next ARGV-element.  */
+
+static char *nextchar;
+static int sh_charindex;
+
+/* Callers store zero here to inhibit the error message
+   for unrecognized options.  */
+
+int sh_opterr = 1;
+
+/* Set to an option character which was unrecognized.
+   This must be initialized on some systems to avoid linking in the
+   system's own getopt implementation.  */
+
+int sh_optopt = '?';
+
+/* Set to 1 when we see an invalid option; public so getopts can reset it. */
+int sh_badopt = 0;
+
+/* Scan elements of ARGV (whose length is ARGC) for option characters
+   given in OPTSTRING.
+
+   If an element of ARGV starts with '-', and is not exactly "-" or "--",
+   then it is an option element.  The characters of this element
+   (aside from the initial '-') are option characters.  If `sh_getopt'
+   is called repeatedly, it returns successively each of the option characters
+   from each of the option elements.
+
+   If `sh_getopt' finds another option character, it returns that character,
+   updating `sh_optind' and `nextchar' so that the next call to `sh_getopt' can
+   resume the scan with the following option character or ARGV-element.
+
+   If there are no more option characters, `sh_getopt' returns `EOF'.
+   Then `sh_optind' is the index in ARGV of the first ARGV-element
+   that is not an option.
+
+   OPTSTRING is a string containing the legitimate option characters.
+   If an option character is seen that is not listed in OPTSTRING,
+   return '?' after printing an error message.  If you set `sh_opterr' to
+   zero, the error message is suppressed but we still return '?'.
+
+   If a char in OPTSTRING is followed by a colon, that means it wants an arg,
+   so the following text in the same ARGV-element, or the text of the following
+   ARGV-element, is returned in `sh_optarg'. */
+
+/* 1003.2 specifies the format of this message.  */
+#define BADOPT(x)  fprintf (stderr, _("%s: illegal option -- %c\n"), argv[0], x)
+#define NEEDARG(x) fprintf (stderr, _("%s: option requires an argument -- %c\n"), argv[0], x)
+
+int
+sh_getopt (argc, argv, optstring)
+     int argc;
+     char *const *argv;
+     const char *optstring;
+{
+  char c, *temp;
+
+  sh_optarg = 0;
+
+  if (sh_optind >= argc || sh_optind < 0)	/* XXX was sh_optind > argc */
+    {
+      sh_optind = argc;
+      return (EOF);
+    }
+
+  /* Initialize the internal data when the first call is made.
+     Start processing options with ARGV-element 1 (since ARGV-element 0
+     is the program name); the sequence of previously skipped
+     non-option ARGV-elements is empty.  */
+
+  if (sh_optind == 0)
+    {
+      sh_optind = 1;
+      nextchar = (char *)NULL;
+    }
+
+  if (nextchar == 0 || *nextchar == '\0')
+    {
+      /* If we have done all the ARGV-elements, stop the scan. */
+      if (sh_optind >= argc)
+	return EOF;
+
+      temp = argv[sh_optind];
+
+      /* Special ARGV-element `--' means premature end of options.
+	 Skip it like a null option, and return EOF. */
+      if (temp[0] == '-' && temp[1] == '-' && temp[2] == '\0')
+	{
+	  sh_optind++;
+	  return EOF;
+	}
+
+      /* If we have come to a non-option, either stop the scan or describe
+	 it to the caller and pass it by.  This makes the pseudo-option
+	 `-' mean the end of options, but does not skip over it. */
+      if (temp[0] != '-' || temp[1] == '\0')
+	return EOF;
+
+      /* We have found another option-ARGV-element.
+	 Start decoding its characters.  */
+      nextchar = argv[sh_curopt = sh_optind] + 1;
+      sh_charindex = 1;
+    }
+
+  /* Look at and handle the next option-character.  */
+
+  c = *nextchar++; sh_charindex++;
+  temp = strchr (optstring, c);
+
+  sh_optopt = c;
+
+  /* Increment `sh_optind' when we start to process its last character.  */
+  if (nextchar == 0 || *nextchar == '\0')
+    {
+      sh_optind++;
+      nextchar = (char *)NULL;
+    }
+
+  if (sh_badopt = (temp == NULL || c == ':'))
+    {
+      if (sh_opterr)
+	BADOPT (c);
+
+      return '?';
+    }
+
+  if (temp[1] == ':')
+    {
+      if (nextchar && *nextchar)
+	{
+	  /* This is an option that requires an argument.  */
+	  sh_optarg = nextchar;
+	  /* If we end this ARGV-element by taking the rest as an arg,
+	     we must advance to the next element now.  */
+	  sh_optind++;
+	}
+      else if (sh_optind == argc)
+	{
+	  if (sh_opterr)
+	    NEEDARG (c);
+
+	  sh_optopt = c;
+	  sh_optarg = "";	/* Needed by getopts. */
+	  c = (optstring[0] == ':') ? ':' : '?';
+	}
+      else
+	/* We already incremented `sh_optind' once;
+	   increment it again when taking next ARGV-elt as argument.  */
+	sh_optarg = argv[sh_optind++];
+      nextchar = (char *)NULL;
+    }
+  return c;
+}
+
+void
+sh_getopt_restore_state (argv)
+     char **argv;
+{
+  if (nextchar)
+    nextchar = argv[sh_curopt] + sh_charindex;
+}
+
+sh_getopt_state_t *
+sh_getopt_alloc_istate ()
+{
+  sh_getopt_state_t *ret;
+
+  ret = (sh_getopt_state_t *)xmalloc (sizeof (sh_getopt_state_t));
+  return ret;
+}
+
+void
+sh_getopt_dispose_istate (gs)
+     sh_getopt_state_t *gs;
+{
+  free (gs);
+}
+
+sh_getopt_state_t *
+sh_getopt_save_istate ()
+{
+  sh_getopt_state_t *ret;
+
+  ret = sh_getopt_alloc_istate ();
+
+  ret->gs_optarg = sh_optarg;
+  ret->gs_optind = sh_optind;
+  ret->gs_curopt = sh_curopt;
+  ret->gs_nextchar = nextchar;		/* XXX */
+  ret->gs_charindex = sh_charindex;
+  ret->gs_flags = 0;			/* XXX for later use */
+
+  return ret;
+}
+
+void
+sh_getopt_restore_istate (state)
+     sh_getopt_state_t *state;
+{
+  sh_optarg = state->gs_optarg;
+  sh_optind = state->gs_optind;
+  sh_curopt = state->gs_curopt;
+  nextchar = state->gs_nextchar;	/* XXX - probably not usable */
+  sh_charindex = state->gs_charindex;
+
+  sh_getopt_dispose_istate (state);
+}
+
+#if 0
+void
+sh_getopt_debug_restore_state (argv)
+     char **argv;
+{
+  if (nextchar && nextchar != argv[sh_curopt] + sh_charindex)
+    {
+      itrace("sh_getopt_debug_restore_state: resetting nextchar");
+      nextchar = argv[sh_curopt] + sh_charindex;
+    }
+}
+#endif
+ 
+#ifdef TEST
+
+/* Compile with -DTEST to make an executable for use in testing
+   the above definition of `sh_getopt'.  */
+
+int
+main (argc, argv)
+     int argc;
+     char **argv;
+{
+  int c;
+  int digit_sh_optind = 0;
+
+  while (1)
+    {
+      int this_option_sh_optind = sh_optind ? sh_optind : 1;
+
+      c = sh_getopt (argc, argv, "abc:d:0123456789");
+      if (c == EOF)
+	break;
+
+      switch (c)
+	{
+	case '0':
+	case '1':
+	case '2':
+	case '3':
+	case '4':
+	case '5':
+	case '6':
+	case '7':
+	case '8':
+	case '9':
+	  if (digit_sh_optind != 0 && digit_sh_optind != this_option_sh_optind)
+	    printf ("digits occur in two different argv-elements.\n");
+	  digit_sh_optind = this_option_sh_optind;
+	  printf ("option %c\n", c);
+	  break;
+
+	case 'a':
+	  printf ("option a\n");
+	  break;
+
+	case 'b':
+	  printf ("option b\n");
+	  break;
+
+	case 'c':
+	  printf ("option c with value `%s'\n", sh_optarg);
+	  break;
+
+	case '?':
+	  break;
+
+	default:
+	  printf ("?? sh_getopt returned character code 0%o ??\n", c);
+	}
+    }
+
+  if (sh_optind < argc)
+    {
+      printf ("non-option ARGV-elements: ");
+      while (sh_optind < argc)
+	printf ("%s ", argv[sh_optind++]);
+      printf ("\n");
+    }
+
+  exit (0);
+}
+
+#endif /* TEST */