198 lines
4.4 KiB
C
198 lines
4.4 KiB
C
/* $FreeBSD$ */
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/* shell.c -- readline utility functions that are normally provided by
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bash when readline is linked as part of the shell. */
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/* Copyright (C) 1997 Free Software Foundation, Inc.
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This file is part of the GNU Readline Library, a library for
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reading lines of text with interactive input and history editing.
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The GNU Readline Library is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2, or
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(at your option) any later version.
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The GNU Readline Library is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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The GNU General Public License is often shipped with GNU software, and
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is generally kept in a file called COPYING or LICENSE. If you do not
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have a copy of the license, write to the Free Software Foundation,
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59 Temple Place, Suite 330, Boston, MA 02111 USA. */
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#define READLINE_LIBRARY
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#if defined (HAVE_CONFIG_H)
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# include <config.h>
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#endif
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#include <sys/types.h>
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#if defined (HAVE_UNISTD_H)
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# include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#if defined (HAVE_STDLIB_H)
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# include <stdlib.h>
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#else
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# include "ansi_stdlib.h"
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#endif /* HAVE_STDLIB_H */
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#if defined (HAVE_STRING_H)
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# include <string.h>
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#else
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# include <strings.h>
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#endif /* !HAVE_STRING_H */
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#if defined (HAVE_LIMITS_H)
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# include <limits.h>
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#endif
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#include <fcntl.h>
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#include <pwd.h>
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#include <stdio.h>
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#include "rlstdc.h"
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#include "rlshell.h"
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#include "xmalloc.h"
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#if !defined (HAVE_GETPW_DECLS)
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extern struct passwd *getpwuid PARAMS((uid_t));
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#endif /* !HAVE_GETPW_DECLS */
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#ifndef NULL
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# define NULL 0
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#endif
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#ifndef CHAR_BIT
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# define CHAR_BIT 8
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#endif
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/* Nonzero if the integer type T is signed. */
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#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
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/* Bound on length of the string representing an integer value of type T.
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Subtract one for the sign bit if T is signed;
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302 / 1000 is log10 (2) rounded up;
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add one for integer division truncation;
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add one more for a minus sign if t is signed. */
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#define INT_STRLEN_BOUND(t) \
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((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 \
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+ 1 + TYPE_SIGNED (t))
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/* All of these functions are resolved from bash if we are linking readline
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as part of bash. */
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/* Does shell-like quoting using single quotes. */
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char *
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sh_single_quote (string)
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char *string;
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{
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register int c;
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char *result, *r, *s;
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result = (char *)xmalloc (3 + (4 * strlen (string)));
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r = result;
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*r++ = '\'';
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for (s = string; s && (c = *s); s++)
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{
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*r++ = c;
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if (c == '\'')
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{
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*r++ = '\\'; /* insert escaped single quote */
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*r++ = '\'';
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*r++ = '\''; /* start new quoted string */
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}
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}
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*r++ = '\'';
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*r = '\0';
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return (result);
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}
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/* Set the environment variables LINES and COLUMNS to lines and cols,
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respectively. */
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void
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sh_set_lines_and_columns (lines, cols)
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int lines, cols;
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{
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char *b;
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#if defined (HAVE_PUTENV)
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b = (char *)xmalloc (INT_STRLEN_BOUND (int) + sizeof ("LINES=") + 1);
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sprintf (b, "LINES=%d", lines);
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putenv (b);
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b = (char *)xmalloc (INT_STRLEN_BOUND (int) + sizeof ("COLUMNS=") + 1);
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sprintf (b, "COLUMNS=%d", cols);
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putenv (b);
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#else /* !HAVE_PUTENV */
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# if defined (HAVE_SETENV)
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b = (char *)xmalloc (INT_STRLEN_BOUND (int) + 1);
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sprintf (b, "%d", lines);
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setenv ("LINES", b, 1);
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b = (char *)xmalloc (INT_STRLEN_BOUND (int) + 1);
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sprintf (b, "%d", cols);
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setenv ("COLUMNS", b, 1);
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# endif /* HAVE_SETENV */
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#endif /* !HAVE_PUTENV */
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}
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char *
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sh_get_env_value (varname)
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const char *varname;
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{
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return ((char *)getenv (varname));
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}
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char *
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sh_get_home_dir ()
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{
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char *home_dir;
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struct passwd *entry;
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home_dir = (char *)NULL;
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entry = getpwuid (getuid ());
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if (entry)
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home_dir = entry->pw_dir;
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return (home_dir);
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}
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#if !defined (O_NDELAY)
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# if defined (FNDELAY)
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# define O_NDELAY FNDELAY
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# endif
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#endif
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int
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sh_unset_nodelay_mode (fd)
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int fd;
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{
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int flags, bflags;
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if ((flags = fcntl (fd, F_GETFL, 0)) < 0)
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return -1;
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bflags = 0;
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#ifdef O_NONBLOCK
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bflags |= O_NONBLOCK;
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#endif
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#ifdef O_NDELAY
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bflags |= O_NDELAY;
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#endif
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if (flags & bflags)
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{
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flags &= ~bflags;
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return (fcntl (fd, F_SETFL, flags));
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}
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return 0;
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}
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