230 lines
5.6 KiB
C
230 lines
5.6 KiB
C
|
/* filemode.c -- make a string describing file modes
|
|||
|
|
Copyright (C) 1985, 1990 Free Software Foundation, Inc.
|
|||
|
|
|
|||
|
|
This program is free software; you can redistribute it and/or modify
|
|||
|
|
it under the terms of the GNU General Public License as published by
|
|||
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|||
|
|
any later version.
|
|||
|
|
|
|||
|
|
This program is distributed in the hope that it will be useful,
|
|||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|||
|
|
GNU General Public License for more details.
|
|||
|
|
|
|||
|
|
You should have received a copy of the GNU General Public License
|
|||
|
|
along with this program; if not, write to the Free Software
|
|||
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|||
|
|
|
|||
|
|
#ifdef HAVE_CONFIG_H
|
|||
|
|
#include "config.h"
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
#include <sys/types.h>
|
|||
|
|
#include <sys/stat.h>
|
|||
|
|
|
|||
|
|
#ifndef S_IREAD
|
|||
|
|
#define S_IREAD S_IRUSR
|
|||
|
|
#define S_IWRITE S_IWUSR
|
|||
|
|
#define S_IEXEC S_IXUSR
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
#if !defined(S_ISREG) || defined(NO_MODE_T)
|
|||
|
|
/* Doesn't have POSIX.1 stat stuff or doesn't have mode_t. */
|
|||
|
|
#define mode_t unsigned short
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
#if !defined(S_ISBLK) && defined(S_IFBLK)
|
|||
|
|
#define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
|
|||
|
|
#endif
|
|||
|
|
#if !defined(S_ISCHR) && defined(S_IFCHR)
|
|||
|
|
#define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
|
|||
|
|
#endif
|
|||
|
|
#if !defined(S_ISDIR) && defined(S_IFDIR)
|
|||
|
|
#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
|
|||
|
|
#endif
|
|||
|
|
#if !defined(S_ISREG) && defined(S_IFREG)
|
|||
|
|
#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
|
|||
|
|
#endif
|
|||
|
|
#if !defined(S_ISFIFO) && defined(S_IFIFO)
|
|||
|
|
#define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
|
|||
|
|
#endif
|
|||
|
|
#if !defined(S_ISLNK) && defined(S_IFLNK)
|
|||
|
|
#define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
|
|||
|
|
#endif
|
|||
|
|
#if !defined(S_ISSOCK) && defined(S_IFSOCK)
|
|||
|
|
#define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
|
|||
|
|
#endif
|
|||
|
|
#if !defined(S_ISMPB) && defined(S_IFMPB) /* V7 */
|
|||
|
|
#define S_ISMPB(m) (((m) & S_IFMT) == S_IFMPB)
|
|||
|
|
#define S_ISMPC(m) (((m) & S_IFMT) == S_IFMPC)
|
|||
|
|
#endif
|
|||
|
|
#if !defined(S_ISNWK) && defined(S_IFNWK) /* HP/UX */
|
|||
|
|
#define S_ISNWK(m) (((m) & S_IFMT) == S_IFNWK)
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
void mode_string ();
|
|||
|
|
static char ftypelet ();
|
|||
|
|
static void rwx ();
|
|||
|
|
static void setst ();
|
|||
|
|
|
|||
|
|
/* filemodestring - fill in string STR with an ls-style ASCII
|
|||
|
|
representation of the st_mode field of file stats block STATP.
|
|||
|
|
10 characters are stored in STR; no terminating null is added.
|
|||
|
|
The characters stored in STR are:
|
|||
|
|
|
|||
|
|
0 File type. 'd' for directory, 'c' for character
|
|||
|
|
special, 'b' for block special, 'm' for multiplex,
|
|||
|
|
'l' for symbolic link, 's' for socket, 'p' for fifo,
|
|||
|
|
'-' for regular, '?' for any other file type
|
|||
|
|
|
|||
|
|
1 'r' if the owner may read, '-' otherwise.
|
|||
|
|
|
|||
|
|
2 'w' if the owner may write, '-' otherwise.
|
|||
|
|
|
|||
|
|
3 'x' if the owner may execute, 's' if the file is
|
|||
|
|
set-user-id, '-' otherwise.
|
|||
|
|
'S' if the file is set-user-id, but the execute
|
|||
|
|
bit isn't set.
|
|||
|
|
|
|||
|
|
4 'r' if group members may read, '-' otherwise.
|
|||
|
|
|
|||
|
|
5 'w' if group members may write, '-' otherwise.
|
|||
|
|
|
|||
|
|
6 'x' if group members may execute, 's' if the file is
|
|||
|
|
set-group-id, '-' otherwise.
|
|||
|
|
'S' if it is set-group-id but not executable.
|
|||
|
|
|
|||
|
|
7 'r' if any user may read, '-' otherwise.
|
|||
|
|
|
|||
|
|
8 'w' if any user may write, '-' otherwise.
|
|||
|
|
|
|||
|
|
9 'x' if any user may execute, 't' if the file is "sticky"
|
|||
|
|
(will be retained in swap space after execution), '-'
|
|||
|
|
otherwise.
|
|||
|
|
'T' if the file is sticky but not executable. */
|
|||
|
|
|
|||
|
|
void
|
|||
|
|
filemodestring (statp, str)
|
|||
|
|
struct stat *statp;
|
|||
|
|
char *str;
|
|||
|
|
{
|
|||
|
|
mode_string (statp->st_mode, str);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* Like filemodestring, but only the relevant part of the `struct stat'
|
|||
|
|
is given as an argument. */
|
|||
|
|
|
|||
|
|
void
|
|||
|
|
mode_string (mode, str)
|
|||
|
|
unsigned short mode;
|
|||
|
|
char *str;
|
|||
|
|
{
|
|||
|
|
str[0] = ftypelet (mode);
|
|||
|
|
rwx ((mode & 0700) << 0, &str[1]);
|
|||
|
|
rwx ((mode & 0070) << 3, &str[4]);
|
|||
|
|
rwx ((mode & 0007) << 6, &str[7]);
|
|||
|
|
setst (mode, str);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* Return a character indicating the type of file described by
|
|||
|
|
file mode BITS:
|
|||
|
|
'd' for directories
|
|||
|
|
'b' for block special files
|
|||
|
|
'c' for character special files
|
|||
|
|
'm' for multiplexor files
|
|||
|
|
'l' for symbolic links
|
|||
|
|
's' for sockets
|
|||
|
|
'p' for fifos
|
|||
|
|
'-' for regular files
|
|||
|
|
'?' for any other file type. */
|
|||
|
|
|
|||
|
|
static char
|
|||
|
|
ftypelet (bits)
|
|||
|
|
mode_t bits;
|
|||
|
|
{
|
|||
|
|
#ifdef S_ISBLK
|
|||
|
|
if (S_ISBLK (bits))
|
|||
|
|
return 'b';
|
|||
|
|
#endif
|
|||
|
|
if (S_ISCHR (bits))
|
|||
|
|
return 'c';
|
|||
|
|
if (S_ISDIR (bits))
|
|||
|
|
return 'd';
|
|||
|
|
if (S_ISREG (bits))
|
|||
|
|
return '-';
|
|||
|
|
#ifdef S_ISFIFO
|
|||
|
|
if (S_ISFIFO (bits))
|
|||
|
|
return 'p';
|
|||
|
|
#endif
|
|||
|
|
#ifdef S_ISLNK
|
|||
|
|
if (S_ISLNK (bits))
|
|||
|
|
return 'l';
|
|||
|
|
#endif
|
|||
|
|
#ifdef S_ISSOCK
|
|||
|
|
if (S_ISSOCK (bits))
|
|||
|
|
return 's';
|
|||
|
|
#endif
|
|||
|
|
#ifdef S_ISMPC
|
|||
|
|
if (S_ISMPC (bits))
|
|||
|
|
return 'm';
|
|||
|
|
#endif
|
|||
|
|
#ifdef S_ISNWK
|
|||
|
|
if (S_ISNWK (bits))
|
|||
|
|
return 'n';
|
|||
|
|
#endif
|
|||
|
|
return '?';
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* Look at read, write, and execute bits in BITS and set
|
|||
|
|
flags in CHARS accordingly. */
|
|||
|
|
|
|||
|
|
static void
|
|||
|
|
rwx (bits, chars)
|
|||
|
|
unsigned short bits;
|
|||
|
|
char *chars;
|
|||
|
|
{
|
|||
|
|
chars[0] = (bits & S_IREAD) ? 'r' : '-';
|
|||
|
|
chars[1] = (bits & S_IWRITE) ? 'w' : '-';
|
|||
|
|
chars[2] = (bits & S_IEXEC) ? 'x' : '-';
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* Set the 's' and 't' flags in file attributes string CHARS,
|
|||
|
|
according to the file mode BITS. */
|
|||
|
|
|
|||
|
|
static void
|
|||
|
|
setst (bits, chars)
|
|||
|
|
unsigned short bits;
|
|||
|
|
char *chars;
|
|||
|
|
{
|
|||
|
|
#ifdef S_ISUID
|
|||
|
|
if (bits & S_ISUID)
|
|||
|
|
{
|
|||
|
|
if (chars[3] != 'x')
|
|||
|
|
/* Set-uid, but not executable by owner. */
|
|||
|
|
chars[3] = 'S';
|
|||
|
|
else
|
|||
|
|
chars[3] = 's';
|
|||
|
|
}
|
|||
|
|
#endif
|
|||
|
|
#ifdef S_ISGID
|
|||
|
|
if (bits & S_ISGID)
|
|||
|
|
{
|
|||
|
|
if (chars[6] != 'x')
|
|||
|
|
/* Set-gid, but not executable by group. */
|
|||
|
|
chars[6] = 'S';
|
|||
|
|
else
|
|||
|
|
chars[6] = 's';
|
|||
|
|
}
|
|||
|
|
#endif
|
|||
|
|
#ifdef S_ISVTX
|
|||
|
|
if (bits & S_ISVTX)
|
|||
|
|
{
|
|||
|
|
if (chars[9] != 'x')
|
|||
|
|
/* Sticky, but not executable by others. */
|
|||
|
|
chars[9] = 'T';
|
|||
|
|
else
|
|||
|
|
chars[9] = 't';
|
|||
|
|
}
|
|||
|
|
#endif
|
|||
|
|
}
|