| 1 | /* $FreeBSD: src/contrib/libreadline/shell.c,v 1.4.2.2 2000/07/06 23:04:24 ache Exp $ */ |
| 2 | /* $DragonFly: src/contrib/libreadline/Attic/shell.c,v 1.2 2003/06/17 04:24:03 dillon Exp $ */ |
| 3 | /* shell.c -- readline utility functions that are normally provided by |
| 4 | bash when readline is linked as part of the shell. */ |
| 5 | |
| 6 | /* Copyright (C) 1997 Free Software Foundation, Inc. |
| 7 | |
| 8 | This file is part of the GNU Readline Library, a library for |
| 9 | reading lines of text with interactive input and history editing. |
| 10 | |
| 11 | The GNU Readline Library is free software; you can redistribute it |
| 12 | and/or modify it under the terms of the GNU General Public License |
| 13 | as published by the Free Software Foundation; either version 2, or |
| 14 | (at your option) any later version. |
| 15 | |
| 16 | The GNU Readline Library is distributed in the hope that it will be |
| 17 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty |
| 18 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | GNU General Public License for more details. |
| 20 | |
| 21 | The GNU General Public License is often shipped with GNU software, and |
| 22 | is generally kept in a file called COPYING or LICENSE. If you do not |
| 23 | have a copy of the license, write to the Free Software Foundation, |
| 24 | 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
| 25 | #define READLINE_LIBRARY |
| 26 | |
| 27 | #if defined (HAVE_CONFIG_H) |
| 28 | # include <config.h> |
| 29 | #endif |
| 30 | |
| 31 | #include <sys/types.h> |
| 32 | |
| 33 | #if defined (HAVE_UNISTD_H) |
| 34 | # include <unistd.h> |
| 35 | #endif /* HAVE_UNISTD_H */ |
| 36 | |
| 37 | #if defined (HAVE_STDLIB_H) |
| 38 | # include <stdlib.h> |
| 39 | #else |
| 40 | # include "ansi_stdlib.h" |
| 41 | #endif /* HAVE_STDLIB_H */ |
| 42 | |
| 43 | #if defined (HAVE_STRING_H) |
| 44 | # include <string.h> |
| 45 | #else |
| 46 | # include <strings.h> |
| 47 | #endif /* !HAVE_STRING_H */ |
| 48 | |
| 49 | #include <fcntl.h> |
| 50 | #include <pwd.h> |
| 51 | |
| 52 | #include <stdio.h> |
| 53 | |
| 54 | #include "rlshell.h" |
| 55 | #include "xmalloc.h" |
| 56 | |
| 57 | #if !defined (HAVE_GETPW_DECLS) |
| 58 | extern struct passwd *getpwuid (); |
| 59 | #endif /* !HAVE_GETPW_DECLS */ |
| 60 | |
| 61 | #ifndef NULL |
| 62 | # define NULL 0 |
| 63 | #endif |
| 64 | |
| 65 | /* All of these functions are resolved from bash if we are linking readline |
| 66 | as part of bash. */ |
| 67 | |
| 68 | /* Does shell-like quoting using single quotes. */ |
| 69 | char * |
| 70 | single_quote (string) |
| 71 | char *string; |
| 72 | { |
| 73 | register int c; |
| 74 | char *result, *r, *s; |
| 75 | |
| 76 | result = (char *)xmalloc (3 + (4 * strlen (string))); |
| 77 | r = result; |
| 78 | *r++ = '\''; |
| 79 | |
| 80 | for (s = string; s && (c = *s); s++) |
| 81 | { |
| 82 | *r++ = c; |
| 83 | |
| 84 | if (c == '\'') |
| 85 | { |
| 86 | *r++ = '\\'; /* insert escaped single quote */ |
| 87 | *r++ = '\''; |
| 88 | *r++ = '\''; /* start new quoted string */ |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | *r++ = '\''; |
| 93 | *r = '\0'; |
| 94 | |
| 95 | return (result); |
| 96 | } |
| 97 | |
| 98 | /* Set the environment variables LINES and COLUMNS to lines and cols, |
| 99 | respectively. */ |
| 100 | void |
| 101 | set_lines_and_columns (lines, cols) |
| 102 | int lines, cols; |
| 103 | { |
| 104 | char *b; |
| 105 | |
| 106 | #if defined (HAVE_PUTENV) |
| 107 | b = xmalloc (24); |
| 108 | sprintf (b, "LINES=%d", lines); |
| 109 | putenv (b); |
| 110 | b = xmalloc (24); |
| 111 | sprintf (b, "COLUMNS=%d", cols); |
| 112 | putenv (b); |
| 113 | #else /* !HAVE_PUTENV */ |
| 114 | # if defined (HAVE_SETENV) |
| 115 | b = xmalloc (8); |
| 116 | sprintf (b, "%d", lines); |
| 117 | setenv ("LINES", b, 1); |
| 118 | b = xmalloc (8); |
| 119 | sprintf (b, "%d", cols); |
| 120 | setenv ("COLUMNS", b, 1); |
| 121 | # endif /* HAVE_SETENV */ |
| 122 | #endif /* !HAVE_PUTENV */ |
| 123 | } |
| 124 | |
| 125 | char * |
| 126 | get_env_value (varname) |
| 127 | char *varname; |
| 128 | { |
| 129 | return ((char *)getenv (varname)); |
| 130 | } |
| 131 | |
| 132 | char * |
| 133 | get_home_dir () |
| 134 | { |
| 135 | char *home_dir; |
| 136 | struct passwd *entry; |
| 137 | |
| 138 | home_dir = (char *)NULL; |
| 139 | entry = getpwuid (getuid ()); |
| 140 | if (entry) |
| 141 | home_dir = entry->pw_dir; |
| 142 | return (home_dir); |
| 143 | } |
| 144 | |
| 145 | #if !defined (O_NDELAY) |
| 146 | # if defined (FNDELAY) |
| 147 | # define O_NDELAY FNDELAY |
| 148 | # endif |
| 149 | #endif |
| 150 | |
| 151 | int |
| 152 | unset_nodelay_mode (fd) |
| 153 | int fd; |
| 154 | { |
| 155 | int flags, bflags; |
| 156 | |
| 157 | if ((flags = fcntl (fd, F_GETFL, 0)) < 0) |
| 158 | return -1; |
| 159 | |
| 160 | bflags = 0; |
| 161 | |
| 162 | #ifdef O_NONBLOCK |
| 163 | bflags |= O_NONBLOCK; |
| 164 | #endif |
| 165 | |
| 166 | #ifdef O_NDELAY |
| 167 | bflags |= O_NDELAY; |
| 168 | #endif |
| 169 | |
| 170 | if (flags & bflags) |
| 171 | { |
| 172 | flags &= ~bflags; |
| 173 | return (fcntl (fd, F_SETFL, flags)); |
| 174 | } |
| 175 | |
| 176 | return 0; |
| 177 | } |