1/* $FreeBSD: head/contrib/libreadline/shell.c 119614 2003-08-31 18:29:38Z ache $ */
| 1/* $FreeBSD: head/contrib/libreadline/shell.c 136758 2004-10-21 20:02:02Z peter $ */ 2
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2/* shell.c -- readline utility functions that are normally provided by 3 bash when readline is linked as part of the shell. */ 4 5/* Copyright (C) 1997 Free Software Foundation, Inc. 6 7 This file is part of the GNU Readline Library, a library for 8 reading lines of text with interactive input and history editing. 9 10 The GNU Readline Library is free software; you can redistribute it 11 and/or modify it under the terms of the GNU General Public License 12 as published by the Free Software Foundation; either version 2, or 13 (at your option) any later version. 14 15 The GNU Readline Library is distributed in the hope that it will be 16 useful, but WITHOUT ANY WARRANTY; without even the implied warranty 17 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License for more details. 19 20 The GNU General Public License is often shipped with GNU software, and 21 is generally kept in a file called COPYING or LICENSE. If you do not 22 have a copy of the license, write to the Free Software Foundation, 23 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ 24#define READLINE_LIBRARY 25 26#if defined (HAVE_CONFIG_H) 27# include <config.h> 28#endif 29 30#include <sys/types.h> 31 32#if defined (HAVE_UNISTD_H) 33# include <unistd.h> 34#endif /* HAVE_UNISTD_H */ 35 36#if defined (HAVE_STDLIB_H) 37# include <stdlib.h> 38#else 39# include "ansi_stdlib.h" 40#endif /* HAVE_STDLIB_H */ 41 42#if defined (HAVE_STRING_H) 43# include <string.h> 44#else 45# include <strings.h> 46#endif /* !HAVE_STRING_H */ 47 48#if defined (HAVE_LIMITS_H) 49# include <limits.h> 50#endif 51 52#include <fcntl.h> 53#include <pwd.h> 54 55#include <stdio.h> 56 57#include "rlstdc.h" 58#include "rlshell.h" 59#include "xmalloc.h" 60 61#if !defined (HAVE_GETPW_DECLS) 62extern struct passwd *getpwuid PARAMS((uid_t)); 63#endif /* !HAVE_GETPW_DECLS */ 64 65#ifndef NULL 66# define NULL 0 67#endif 68 69#ifndef CHAR_BIT 70# define CHAR_BIT 8 71#endif 72 73/* Nonzero if the integer type T is signed. */ 74#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1)) 75 76/* Bound on length of the string representing an integer value of type T. 77 Subtract one for the sign bit if T is signed; 78 302 / 1000 is log10 (2) rounded up; 79 add one for integer division truncation; 80 add one more for a minus sign if t is signed. */ 81#define INT_STRLEN_BOUND(t) \ 82 ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 \ 83 + 1 + TYPE_SIGNED (t)) 84 85/* All of these functions are resolved from bash if we are linking readline 86 as part of bash. */ 87 88/* Does shell-like quoting using single quotes. */ 89char * 90sh_single_quote (string) 91 char *string; 92{ 93 register int c; 94 char *result, *r, *s; 95 96 result = (char *)xmalloc (3 + (4 * strlen (string))); 97 r = result; 98 *r++ = '\''; 99 100 for (s = string; s && (c = *s); s++) 101 { 102 *r++ = c; 103 104 if (c == '\'') 105 { 106 *r++ = '\\'; /* insert escaped single quote */ 107 *r++ = '\''; 108 *r++ = '\''; /* start new quoted string */ 109 } 110 } 111 112 *r++ = '\''; 113 *r = '\0'; 114 115 return (result); 116} 117 118/* Set the environment variables LINES and COLUMNS to lines and cols, 119 respectively. */ 120void 121sh_set_lines_and_columns (lines, cols) 122 int lines, cols; 123{ 124 char *b; 125 126#if defined (HAVE_PUTENV) 127 b = (char *)xmalloc (INT_STRLEN_BOUND (int) + sizeof ("LINES=") + 1); 128 sprintf (b, "LINES=%d", lines); 129 putenv (b);
| 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#if defined (HAVE_LIMITS_H) 50# include <limits.h> 51#endif 52 53#include <fcntl.h> 54#include <pwd.h> 55 56#include <stdio.h> 57 58#include "rlstdc.h" 59#include "rlshell.h" 60#include "xmalloc.h" 61 62#if !defined (HAVE_GETPW_DECLS) 63extern struct passwd *getpwuid PARAMS((uid_t)); 64#endif /* !HAVE_GETPW_DECLS */ 65 66#ifndef NULL 67# define NULL 0 68#endif 69 70#ifndef CHAR_BIT 71# define CHAR_BIT 8 72#endif 73 74/* Nonzero if the integer type T is signed. */ 75#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1)) 76 77/* Bound on length of the string representing an integer value of type T. 78 Subtract one for the sign bit if T is signed; 79 302 / 1000 is log10 (2) rounded up; 80 add one for integer division truncation; 81 add one more for a minus sign if t is signed. */ 82#define INT_STRLEN_BOUND(t) \ 83 ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 \ 84 + 1 + TYPE_SIGNED (t)) 85 86/* All of these functions are resolved from bash if we are linking readline 87 as part of bash. */ 88 89/* Does shell-like quoting using single quotes. */ 90char * 91sh_single_quote (string) 92 char *string; 93{ 94 register int c; 95 char *result, *r, *s; 96 97 result = (char *)xmalloc (3 + (4 * strlen (string))); 98 r = result; 99 *r++ = '\''; 100 101 for (s = string; s && (c = *s); s++) 102 { 103 *r++ = c; 104 105 if (c == '\'') 106 { 107 *r++ = '\\'; /* insert escaped single quote */ 108 *r++ = '\''; 109 *r++ = '\''; /* start new quoted string */ 110 } 111 } 112 113 *r++ = '\''; 114 *r = '\0'; 115 116 return (result); 117} 118 119/* Set the environment variables LINES and COLUMNS to lines and cols, 120 respectively. */ 121void 122sh_set_lines_and_columns (lines, cols) 123 int lines, cols; 124{ 125 char *b; 126 127#if defined (HAVE_PUTENV) 128 b = (char *)xmalloc (INT_STRLEN_BOUND (int) + sizeof ("LINES=") + 1); 129 sprintf (b, "LINES=%d", lines); 130 putenv (b);
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| 131
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130 b = (char *)xmalloc (INT_STRLEN_BOUND (int) + sizeof ("COLUMNS=") + 1); 131 sprintf (b, "COLUMNS=%d", cols); 132 putenv (b); 133#else /* !HAVE_PUTENV */ 134# if defined (HAVE_SETENV) 135 b = (char *)xmalloc (INT_STRLEN_BOUND (int) + 1); 136 sprintf (b, "%d", lines); 137 setenv ("LINES", b, 1);
| 132 b = (char *)xmalloc (INT_STRLEN_BOUND (int) + sizeof ("COLUMNS=") + 1); 133 sprintf (b, "COLUMNS=%d", cols); 134 putenv (b); 135#else /* !HAVE_PUTENV */ 136# if defined (HAVE_SETENV) 137 b = (char *)xmalloc (INT_STRLEN_BOUND (int) + 1); 138 sprintf (b, "%d", lines); 139 setenv ("LINES", b, 1);
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| 140 free (b); 141
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138 b = (char *)xmalloc (INT_STRLEN_BOUND (int) + 1); 139 sprintf (b, "%d", cols); 140 setenv ("COLUMNS", b, 1);
| 142 b = (char *)xmalloc (INT_STRLEN_BOUND (int) + 1); 143 sprintf (b, "%d", cols); 144 setenv ("COLUMNS", b, 1);
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| 145 free (b);
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141# endif /* HAVE_SETENV */ 142#endif /* !HAVE_PUTENV */ 143} 144 145char * 146sh_get_env_value (varname) 147 const char *varname; 148{ 149 return ((char *)getenv (varname)); 150} 151 152char * 153sh_get_home_dir () 154{ 155 char *home_dir; 156 struct passwd *entry; 157 158 home_dir = (char *)NULL; 159 entry = getpwuid (getuid ()); 160 if (entry) 161 home_dir = entry->pw_dir; 162 return (home_dir); 163} 164 165#if !defined (O_NDELAY) 166# if defined (FNDELAY) 167# define O_NDELAY FNDELAY 168# endif 169#endif 170 171int 172sh_unset_nodelay_mode (fd) 173 int fd; 174{ 175 int flags, bflags; 176 177 if ((flags = fcntl (fd, F_GETFL, 0)) < 0) 178 return -1; 179 180 bflags = 0; 181 182#ifdef O_NONBLOCK 183 bflags |= O_NONBLOCK; 184#endif 185 186#ifdef O_NDELAY 187 bflags |= O_NDELAY; 188#endif 189 190 if (flags & bflags) 191 { 192 flags &= ~bflags; 193 return (fcntl (fd, F_SETFL, flags)); 194 } 195 196 return 0; 197}
| 146# endif /* HAVE_SETENV */ 147#endif /* !HAVE_PUTENV */ 148} 149 150char * 151sh_get_env_value (varname) 152 const char *varname; 153{ 154 return ((char *)getenv (varname)); 155} 156 157char * 158sh_get_home_dir () 159{ 160 char *home_dir; 161 struct passwd *entry; 162 163 home_dir = (char *)NULL; 164 entry = getpwuid (getuid ()); 165 if (entry) 166 home_dir = entry->pw_dir; 167 return (home_dir); 168} 169 170#if !defined (O_NDELAY) 171# if defined (FNDELAY) 172# define O_NDELAY FNDELAY 173# endif 174#endif 175 176int 177sh_unset_nodelay_mode (fd) 178 int fd; 179{ 180 int flags, bflags; 181 182 if ((flags = fcntl (fd, F_GETFL, 0)) < 0) 183 return -1; 184 185 bflags = 0; 186 187#ifdef O_NONBLOCK 188 bflags |= O_NONBLOCK; 189#endif 190 191#ifdef O_NDELAY 192 bflags |= O_NDELAY; 193#endif 194 195 if (flags & bflags) 196 { 197 flags &= ~bflags; 198 return (fcntl (fd, F_SETFL, flags)); 199 } 200 201 return 0; 202}
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