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-rw-r--r--readline/shell.c140
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diff --git a/readline/shell.c b/readline/shell.c
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+++ b/readline/shell.c
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+/* shell.c -- readline utility functions that are normally provided by
+ bash when readline is linked as part of the shell. */
+
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+
+ This file is part of the GNU Readline Library, a library for
+ reading lines of text with interactive input and history editing.
+
+ The GNU Readline Library 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 1, or
+ (at your option) any later version.
+
+ The GNU Readline Library 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.
+
+ The GNU General Public License is often shipped with GNU software, and
+ is generally kept in a file called COPYING or LICENSE. If you do not
+ have a copy of the license, write to the Free Software Foundation,
+ 675 Mass Ave, Cambridge, MA 02139, USA. */
+#define READLINE_LIBRARY
+
+#if defined (HAVE_CONFIG_H)
+# include <config.h>
+#endif
+
+#if defined (HAVE_UNISTD_H)
+# ifdef _MINIX
+# include <sys/types.h>
+# endif
+# include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+
+#if defined (HAVE_STDLIB_H)
+# include <stdlib.h>
+#else
+# include "ansi_stdlib.h"
+#endif /* HAVE_STDLIB_H */
+
+#if defined (HAVE_STRING_H)
+# include <string.h>
+#else
+# include <strings.h>
+#endif /* !HAVE_STRING_H */
+
+extern char *xmalloc (), *xrealloc ();
+
+#if !defined (SHELL)
+
+#ifdef savestring
+#undef savestring
+#endif
+
+/* Backwards compatibility, now that savestring has been removed from
+ all `public' readline header files. */
+#if 0
+char *
+savestring (s)
+ char *s;
+{
+ return ((char *)strcpy (xmalloc (1 + (int)strlen (s)), (s)));
+}
+#endif
+
+/* Does shell-like quoting using single quotes. */
+char *
+single_quote (string)
+ char *string;
+{
+ register int c;
+ char *result, *r, *s;
+
+ result = (char *)xmalloc (3 + (3 * strlen (string)));
+ r = result;
+ *r++ = '\'';
+
+ for (s = string; s && (c = *s); s++)
+ {
+ *r++ = c;
+
+ if (c == '\'')
+ {
+ *r++ = '\\'; /* insert escaped single quote */
+ *r++ = '\'';
+ *r++ = '\''; /* start new quoted string */
+ }
+ }
+
+ *r++ = '\'';
+ *r = '\0';
+
+ return (result);
+}
+
+/* Set the environment variables LINES and COLUMNS to lines and cols,
+ respectively. */
+void
+set_lines_and_columns (lines, cols)
+ int lines, cols;
+{
+ char *b;
+
+#if defined (HAVE_PUTENV)
+ b = xmalloc (24);
+ sprintf (b, "LINES=%d", lines);
+ putenv (b);
+ b = xmalloc (24);
+ sprintf (b, "COLUMNS=%d", cols);
+ putenv (b);
+#else /* !HAVE_PUTENV */
+# if defined (HAVE_SETENV)
+ b = xmalloc (8);
+ sprintf (b, "%d", lines);
+ setenv ("LINES", b, 1);
+ b = xmalloc (8);
+ sprintf (b, "%d", cols);
+ setenv ("COLUMNS", b, 1);
+# endif /* HAVE_SETENV */
+#endif /* !HAVE_PUTENV */
+}
+
+char *
+get_env_value (varname)
+ char *varname;
+{
+ return ((char *)getenv (varname));
+}
+
+#else /* SHELL */
+extern char *get_string_value ();
+
+char *
+get_env_value (varname)
+ char *varname;
+{
+ return get_string_value (varname);
+}
+#endif /* SHELL */