248 lines
6 KiB
C
248 lines
6 KiB
C
/* filemode.c -- make a string describing file modes
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Copyright (C) 1985-2022 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "bucomm.h"
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static char ftypelet (unsigned long);
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static void setst (unsigned long, char *);
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/* filemodestring - fill in string STR with an ls-style ASCII
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representation of the st_mode field of file stats block STATP.
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10 characters are stored in STR; no terminating null is added.
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The characters stored in STR are:
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0 File type. 'd' for directory, 'c' for character
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special, 'b' for block special, 'm' for multiplex,
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'l' for symbolic link, 's' for socket, 'p' for fifo,
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'-' for any other file type
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1 'r' if the owner may read, '-' otherwise.
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2 'w' if the owner may write, '-' otherwise.
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3 'x' if the owner may execute, 's' if the file is
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set-user-id, '-' otherwise.
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'S' if the file is set-user-id, but the execute
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bit isn't set.
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4 'r' if group members may read, '-' otherwise.
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5 'w' if group members may write, '-' otherwise.
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6 'x' if group members may execute, 's' if the file is
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set-group-id, '-' otherwise.
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'S' if it is set-group-id but not executable.
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7 'r' if any user may read, '-' otherwise.
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8 'w' if any user may write, '-' otherwise.
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9 'x' if any user may execute, 't' if the file is "sticky"
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(will be retained in swap space after execution), '-'
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otherwise.
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'T' if the file is sticky but not executable. */
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/* Get definitions for the file permission bits. */
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#ifndef S_IRWXU
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#define S_IRWXU 0700
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#endif
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#ifndef S_IRUSR
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#define S_IRUSR 0400
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#endif
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#ifndef S_IWUSR
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#define S_IWUSR 0200
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#endif
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#ifndef S_IXUSR
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#define S_IXUSR 0100
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#endif
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#ifndef S_IRWXG
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#define S_IRWXG 0070
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#endif
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#ifndef S_IRGRP
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#define S_IRGRP 0040
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#endif
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#ifndef S_IWGRP
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#define S_IWGRP 0020
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#endif
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#ifndef S_IXGRP
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#define S_IXGRP 0010
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#endif
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#ifndef S_IRWXO
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#define S_IRWXO 0007
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#endif
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#ifndef S_IROTH
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#define S_IROTH 0004
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#endif
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#ifndef S_IWOTH
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#define S_IWOTH 0002
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#endif
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#ifndef S_IXOTH
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#define S_IXOTH 0001
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#endif
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/* Like filemodestring, but only the relevant part of the `struct stat'
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is given as an argument. */
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void
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mode_string (unsigned long mode, char *str)
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{
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str[0] = ftypelet ((unsigned long) mode);
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str[1] = (mode & S_IRUSR) != 0 ? 'r' : '-';
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str[2] = (mode & S_IWUSR) != 0 ? 'w' : '-';
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str[3] = (mode & S_IXUSR) != 0 ? 'x' : '-';
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str[4] = (mode & S_IRGRP) != 0 ? 'r' : '-';
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str[5] = (mode & S_IWGRP) != 0 ? 'w' : '-';
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str[6] = (mode & S_IXGRP) != 0 ? 'x' : '-';
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str[7] = (mode & S_IROTH) != 0 ? 'r' : '-';
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str[8] = (mode & S_IWOTH) != 0 ? 'w' : '-';
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str[9] = (mode & S_IXOTH) != 0 ? 'x' : '-';
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setst ((unsigned long) mode, str);
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}
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/* Return a character indicating the type of file described by
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file mode BITS:
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'd' for directories
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'b' for block special files
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'c' for character special files
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'm' for multiplexer files
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'l' for symbolic links
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's' for sockets
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'p' for fifos
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'-' for any other file type. */
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#ifndef S_ISDIR
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#ifdef S_IFDIR
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#define S_ISDIR(i) (((i) & S_IFMT) == S_IFDIR)
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#else /* ! defined (S_IFDIR) */
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#define S_ISDIR(i) (((i) & 0170000) == 040000)
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#endif /* ! defined (S_IFDIR) */
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#endif /* ! defined (S_ISDIR) */
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#ifndef S_ISBLK
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#ifdef S_IFBLK
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#define S_ISBLK(i) (((i) & S_IFMT) == S_IFBLK)
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#else /* ! defined (S_IFBLK) */
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#define S_ISBLK(i) 0
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#endif /* ! defined (S_IFBLK) */
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#endif /* ! defined (S_ISBLK) */
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#ifndef S_ISCHR
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#ifdef S_IFCHR
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#define S_ISCHR(i) (((i) & S_IFMT) == S_IFCHR)
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#else /* ! defined (S_IFCHR) */
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#define S_ISCHR(i) 0
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#endif /* ! defined (S_IFCHR) */
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#endif /* ! defined (S_ISCHR) */
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#ifndef S_ISFIFO
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#ifdef S_IFIFO
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#define S_ISFIFO(i) (((i) & S_IFMT) == S_IFIFO)
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#else /* ! defined (S_IFIFO) */
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#define S_ISFIFO(i) 0
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#endif /* ! defined (S_IFIFO) */
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#endif /* ! defined (S_ISFIFO) */
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#ifndef S_ISSOCK
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#ifdef S_IFSOCK
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#define S_ISSOCK(i) (((i) & S_IFMT) == S_IFSOCK)
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#else /* ! defined (S_IFSOCK) */
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#define S_ISSOCK(i) 0
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#endif /* ! defined (S_IFSOCK) */
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#endif /* ! defined (S_ISSOCK) */
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#ifndef S_ISLNK
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#ifdef S_IFLNK
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#define S_ISLNK(i) (((i) & S_IFMT) == S_IFLNK)
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#else /* ! defined (S_IFLNK) */
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#define S_ISLNK(i) 0
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#endif /* ! defined (S_IFLNK) */
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#endif /* ! defined (S_ISLNK) */
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static char
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ftypelet (unsigned long bits)
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{
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if (S_ISDIR (bits))
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return 'd';
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if (S_ISLNK (bits))
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return 'l';
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if (S_ISBLK (bits))
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return 'b';
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if (S_ISCHR (bits))
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return 'c';
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if (S_ISSOCK (bits))
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return 's';
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if (S_ISFIFO (bits))
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return 'p';
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#ifdef S_IFMT
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#ifdef S_IFMPC
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if ((bits & S_IFMT) == S_IFMPC
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|| (bits & S_IFMT) == S_IFMPB)
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return 'm';
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#endif
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#ifdef S_IFNWK
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if ((bits & S_IFMT) == S_IFNWK)
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return 'n';
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#endif
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#endif
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return '-';
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}
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/* Set the 's' and 't' flags in file attributes string CHARS,
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according to the file mode BITS. */
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static void
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setst (unsigned long bits ATTRIBUTE_UNUSED, char *chars ATTRIBUTE_UNUSED)
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{
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#ifdef S_ISUID
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if (bits & S_ISUID)
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{
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if (chars[3] != 'x')
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/* Set-uid, but not executable by owner. */
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chars[3] = 'S';
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else
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chars[3] = 's';
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}
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#endif
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#ifdef S_ISGID
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if (bits & S_ISGID)
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{
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if (chars[6] != 'x')
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/* Set-gid, but not executable by group. */
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chars[6] = 'S';
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else
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chars[6] = 's';
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}
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#endif
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#ifdef S_ISVTX
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if (bits & S_ISVTX)
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{
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if (chars[9] != 'x')
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/* Sticky, but not executable by others. */
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chars[9] = 'T';
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else
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chars[9] = 't';
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}
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#endif
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}
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