Imported from ../bash-3.1.tar.gz.

[platform/upstream/bash.git] / lib / readline / shell.c

diff --git a/lib/readline/shell.c b/lib/readline/shell.c
index 3daef69..346f811 100644 (file)
--- a/lib/readline/shell.c
+++ b/lib/readline/shell.c
@@ -44,28 +44,53 @@
 #  include <strings.h>
 #endif /* !HAVE_STRING_H */
 
+#if defined (HAVE_LIMITS_H)
+#  include <limits.h>
+#endif
+
+#if defined (HAVE_FCNTL_H)
 #include <fcntl.h>
+#endif
+#if defined (HAVE_PWD_H)
 #include <pwd.h>
+#endif
 
 #include <stdio.h>
 
+#include "rlstdc.h"
 #include "rlshell.h"
 #include "xmalloc.h"
 
-#if !defined (HAVE_GETPW_DECLS)
-extern struct passwd *getpwuid ();
-#endif /* !HAVE_GETPW_DECLS */
+#if defined (HAVE_GETPWUID) && !defined (HAVE_GETPW_DECLS)
+extern struct passwd *getpwuid PARAMS((uid_t));
+#endif /* HAVE_GETPWUID && !HAVE_GETPW_DECLS */
 
 #ifndef NULL
 #  define NULL 0
 #endif
 
+#ifndef CHAR_BIT
+#  define CHAR_BIT 8
+#endif
+
+/* Nonzero if the integer type T is signed.  */
+#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
+
+/* Bound on length of the string representing an integer value of type T.
+   Subtract one for the sign bit if T is signed;
+   302 / 1000 is log10 (2) rounded up;
+   add one for integer division truncation;
+   add one more for a minus sign if t is signed.  */
+#define INT_STRLEN_BOUND(t) \
+  ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 \
+   + 1 + TYPE_SIGNED (t))
+
 /* All of these functions are resolved from bash if we are linking readline
    as part of bash. */
 
 /* Does shell-like quoting using single quotes. */
 char *
-single_quote (string)
+sh_single_quote (string)
      char *string;
 {
   register int c;
@@ -96,47 +121,53 @@ single_quote (string)
 /* Set the environment variables LINES and COLUMNS to lines and cols,
    respectively. */
 void
-set_lines_and_columns (lines, cols)
+sh_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);
+#if defined (HAVE_SETENV)
+  b = (char *)xmalloc (INT_STRLEN_BOUND (int) + 1);
   sprintf (b, "%d", lines);
   setenv ("LINES", b, 1);
-  b = xmalloc (8);
+  free (b);
+
+  b = (char *)xmalloc (INT_STRLEN_BOUND (int) + 1);
   sprintf (b, "%d", cols);
   setenv ("COLUMNS", b, 1);
-#  endif /* HAVE_SETENV */
-#endif /* !HAVE_PUTENV */
+  free (b);
+#else /* !HAVE_SETENV */
+#  if defined (HAVE_PUTENV)
+  b = (char *)xmalloc (INT_STRLEN_BOUND (int) + sizeof ("LINES=") + 1);
+  sprintf (b, "LINES=%d", lines);
+  putenv (b);
+
+  b = (char *)xmalloc (INT_STRLEN_BOUND (int) + sizeof ("COLUMNS=") + 1);
+  sprintf (b, "COLUMNS=%d", cols);
+  putenv (b);
+#  endif /* HAVE_PUTENV */
+#endif /* !HAVE_SETENV */
 }
 
 char *
-get_env_value (varname)
-     char *varname;
+sh_get_env_value (varname)
+     const char *varname;
 {
   return ((char *)getenv (varname));
 }
 
 char *
-get_home_dir ()
+sh_get_home_dir ()
 {
   char *home_dir;
   struct passwd *entry;
 
   home_dir = (char *)NULL;
+#if defined (HAVE_GETPWUID)
   entry = getpwuid (getuid ());
   if (entry)
     home_dir = entry->pw_dir;
+#endif
   return (home_dir);
 }
 
@@ -147,9 +178,10 @@ get_home_dir ()
 #endif
 
 int
-unset_nodelay_mode (fd)
+sh_unset_nodelay_mode (fd)
      int fd;
 {
+#if defined (HAVE_FCNTL)
   int flags, bflags;
 
   if ((flags = fcntl (fd, F_GETFL, 0)) < 0)
@@ -170,6 +202,7 @@ unset_nodelay_mode (fd)
       flags &= ~bflags;
       return (fcntl (fd, F_SETFL, flags));
     }
+#endif
 
   return 0;
 }