Adding upstream version 5.0.upstream/5.0upstream

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

1 files changed, 317 insertions, 0 deletions

diff --git a/builtins/umask.def b/builtins/umask.def
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+++ b/builtins/umask.def
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+This file is umask.def, from which is created umask.c.
+It implements the builtin "umask" in Bash.
+
+Copyright (C) 1987-2015 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/>.
+
+$PRODUCES umask.c
+
+$BUILTIN umask
+$FUNCTION umask_builtin
+$SHORT_DOC umask [-p] [-S] [mode]
+Display or set file mode mask.
+
+Sets the user file-creation mask to MODE.  If MODE is omitted, prints
+the current value of the mask.
+
+If MODE begins with a digit, it is interpreted as an octal number;
+otherwise it is a symbolic mode string like that accepted by chmod(1).
+
+Options:
+  -p	if MODE is omitted, output in a form that may be reused as input
+  -S	makes the output symbolic; otherwise an octal number is output
+
+Exit Status:
+Returns success unless MODE is invalid or an invalid option is given.
+$END
+
+#include <config.h>
+
+#include "../bashtypes.h"
+#include "filecntl.h"
+#if ! defined(_MINIX) && defined (HAVE_SYS_FILE_H)
+#  include <sys/file.h>
+#endif
+
+#if defined (HAVE_UNISTD_H)
+#include <unistd.h>
+#endif
+
+#include <stdio.h>
+#include <chartypes.h>
+
+#include "../bashintl.h"
+
+#include "../shell.h"
+#include "posixstat.h"
+#include "common.h"
+#include "bashgetopt.h"
+
+/* **************************************************************** */
+/*                                                                  */
+/*                     UMASK Builtin and Helpers                    */
+/*                                                                  */
+/* **************************************************************** */
+
+static void print_symbolic_umask __P((mode_t));
+static int symbolic_umask __P((WORD_LIST *));
+
+/* Set or display the mask used by the system when creating files.  Flag
+   of -S means display the umask in a symbolic mode. */
+int
+umask_builtin (list)
+     WORD_LIST *list;
+{
+  int print_symbolically, opt, umask_value, pflag;
+  mode_t umask_arg;
+
+  print_symbolically = pflag = 0;
+  reset_internal_getopt ();
+  while ((opt = internal_getopt (list, "Sp")) != -1)
+    {
+      switch (opt)
+	{
+	case 'S':
+	  print_symbolically++;
+	  break;
+	case 'p':
+	  pflag++;
+	  break;
+	CASE_HELPOPT;
+	default:
+	  builtin_usage ();
+	  return (EX_USAGE);
+	}
+    }
+
+  list = loptend;
+
+  if (list)
+    {
+      if (DIGIT (*list->word->word))
+	{
+	  umask_value = read_octal (list->word->word);
+
+	  /* Note that other shells just let you set the umask to zero
+	     by specifying a number out of range.  This is a problem
+	     with those shells.  We don't change the umask if the input
+	     is lousy. */
+	  if (umask_value == -1)
+	    {
+	      sh_erange (list->word->word, _("octal number"));
+	      return (EXECUTION_FAILURE);
+	    }
+	}
+      else
+	{
+	  umask_value = symbolic_umask (list);
+	  if (umask_value == -1)
+	    return (EXECUTION_FAILURE);
+	}
+      umask_arg = (mode_t)umask_value;
+      umask (umask_arg);
+      if (print_symbolically)
+	print_symbolic_umask (umask_arg);
+    }
+  else				/* Display the UMASK for this user. */
+    {
+      umask_arg = umask (022);
+      umask (umask_arg);
+
+      if (pflag)
+	printf ("umask%s ", (print_symbolically ? " -S" : ""));
+      if (print_symbolically)
+	print_symbolic_umask (umask_arg);
+      else
+	printf ("%04lo\n", (unsigned long)umask_arg);
+    }
+
+  return (sh_chkwrite (EXECUTION_SUCCESS));
+}
+
+/* Print the umask in a symbolic form.  In the output, a letter is
+   printed if the corresponding bit is clear in the umask. */
+static void
+#if defined (__STDC__)
+print_symbolic_umask (mode_t um)
+#else
+print_symbolic_umask (um)
+     mode_t um;
+#endif
+{
+  char ubits[4], gbits[4], obits[4];		/* u=rwx,g=rwx,o=rwx */
+  int i;
+
+  i = 0;
+  if ((um & S_IRUSR) == 0)
+    ubits[i++] = 'r';
+  if ((um & S_IWUSR) == 0)
+    ubits[i++] = 'w';
+  if ((um & S_IXUSR) == 0)
+    ubits[i++] = 'x';
+  ubits[i] = '\0';
+
+  i = 0;
+  if ((um & S_IRGRP) == 0)
+    gbits[i++] = 'r';
+  if ((um & S_IWGRP) == 0)
+    gbits[i++] = 'w';
+  if ((um & S_IXGRP) == 0)
+    gbits[i++] = 'x';
+  gbits[i] = '\0';
+
+  i = 0;
+  if ((um & S_IROTH) == 0)
+    obits[i++] = 'r';
+  if ((um & S_IWOTH) == 0)
+    obits[i++] = 'w';
+  if ((um & S_IXOTH) == 0)
+    obits[i++] = 'x';
+  obits[i] = '\0';
+
+  printf ("u=%s,g=%s,o=%s\n", ubits, gbits, obits);
+}
+
+int
+parse_symbolic_mode (mode, initial_bits)
+     char *mode;
+     int initial_bits;
+{
+  int who, op, perm, bits, c;
+  char *s;
+
+  for (s = mode, bits = initial_bits;;)
+    {
+      who = op = perm = 0;
+
+      /* Parse the `who' portion of the symbolic mode clause. */
+      while (member (*s, "agou"))
+	{
+	  switch (c = *s++)
+	    {
+	    case 'u':
+	      who |= S_IRWXU;
+	      continue;
+	    case 'g':
+	      who |= S_IRWXG;
+	      continue;
+	    case 'o':
+	      who |= S_IRWXO;
+	      continue;
+	    case 'a':
+	      who |= S_IRWXU | S_IRWXG | S_IRWXO;
+	      continue;
+	    default:
+	      break;
+	    }
+	}
+
+      /* The operation is now sitting in *s. */
+      op = *s++;
+      switch (op)
+	{
+	case '+':
+	case '-':
+	case '=':
+	  break;
+	default:
+	  builtin_error (_("`%c': invalid symbolic mode operator"), op);
+	  return (-1);
+	}
+
+      /* Parse out the `perm' section of the symbolic mode clause. */
+      while (member (*s, "rwx"))
+	{
+	  c = *s++;
+
+	  switch (c)
+	    {
+	    case 'r':
+	      perm |= S_IRUGO;
+	      break;
+	    case 'w':
+	      perm |= S_IWUGO;
+	      break;
+	    case 'x':
+	      perm |= S_IXUGO;
+	      break;
+	    }
+	}
+
+      /* Now perform the operation or return an error for a
+	 bad permission string. */
+      if (!*s || *s == ',')
+	{
+	  if (who)
+	    perm &= who;
+
+	  switch (op)
+	    {
+	    case '+':
+	      bits |= perm;
+	      break;
+	    case '-':
+	      bits &= ~perm;
+	      break;
+	    case '=':
+	      if (who == 0)
+		who = S_IRWXU | S_IRWXG | S_IRWXO;
+	      bits &= ~who;
+	      bits |= perm;
+	      break;
+
+	    /* No other values are possible. */
+	    }
+
+	  if (*s == '\0')
+	    break;
+	  else
+	    s++;	/* skip past ',' */
+	}
+      else
+	{
+	  builtin_error (_("`%c': invalid symbolic mode character"), *s);
+	  return (-1);
+	}
+    }
+
+  return (bits);
+}
+
+/* Set the umask from a symbolic mode string similar to that accepted
+   by chmod.  If the -S argument is given, then print the umask in a
+   symbolic form. */
+static int
+symbolic_umask (list)
+     WORD_LIST *list;
+{
+  int um, bits;
+
+  /* Get the initial umask.  Don't change it yet. */
+  um = umask (022);
+  umask (um);
+
+  /* All work is done with the complement of the umask -- it's
+     more intuitive and easier to deal with.  It is complemented
+     again before being returned. */
+  bits = parse_symbolic_mode (list->word->word, ~um & 0777);
+  if (bits == -1)
+    return (-1);
+
+  um = ~bits & 0777;
+  return (um);
+}