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Diffstat (limited to 'gnu/usr.bin/cpio/filemode.c')
| -rw-r--r-- | gnu/usr.bin/cpio/filemode.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/gnu/usr.bin/cpio/filemode.c b/gnu/usr.bin/cpio/filemode.c new file mode 100644 index 000000000000..9293af681501 --- /dev/null +++ b/gnu/usr.bin/cpio/filemode.c @@ -0,0 +1,229 @@ +/* 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 +} |