diff options
Diffstat (limited to 'shell.c')
| -rw-r--r-- | shell.c | 30 |
1 files changed, 25 insertions, 5 deletions
@@ -44,6 +44,10 @@ # include <strings.h> #endif /* !HAVE_STRING_H */ +#if defined (HAVE_LIMITS_H) +# include <limits.h> +#endif + #include <fcntl.h> #include <pwd.h> @@ -54,13 +58,29 @@ #include "xmalloc.h" #if !defined (HAVE_GETPW_DECLS) -extern struct passwd *getpwuid __P((uid_t)); +extern struct passwd *getpwuid PARAMS((uid_t)); #endif /* !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. */ @@ -103,18 +123,18 @@ sh_set_lines_and_columns (lines, cols) char *b; #if defined (HAVE_PUTENV) - b = xmalloc (24); + b = (char *)xmalloc (INT_STRLEN_BOUND (int) + sizeof ("LINES=") + 1); sprintf (b, "LINES=%d", lines); putenv (b); - b = xmalloc (24); + b = (char *)xmalloc (INT_STRLEN_BOUND (int) + sizeof ("COLUMNS=") + 1); sprintf (b, "COLUMNS=%d", cols); putenv (b); #else /* !HAVE_PUTENV */ # if defined (HAVE_SETENV) - b = xmalloc (8); + b = (char *)xmalloc (INT_STRLEN_BOUND (int) + 1); sprintf (b, "%d", lines); setenv ("LINES", b, 1); - b = xmalloc (8); + b = (char *)xmalloc (INT_STRLEN_BOUND (int) + 1); sprintf (b, "%d", cols); setenv ("COLUMNS", b, 1); # endif /* HAVE_SETENV */ |