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authorDavid Henkel-Wallace <gumby@cygnus>1991-03-21 21:11:26 +0000
committerDavid Henkel-Wallace <gumby@cygnus>1991-03-21 21:11:26 +0000
commit6fd9467324a5ebe73ee7e88e0b2e3a2049e4023f (patch)
tree85cb1012a182a7a44b395cd30399206444d4fad0 /bfd/filemode.c
parent4a81b56152631cda9dc351cb4d2f61f395ee4414 (diff)
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Back from Intel with Steve
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+/* 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 1, 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. */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+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 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 any other file type. */
+
+static char
+ftypelet (bits)
+ unsigned short bits;
+{
+ switch (bits & S_IFMT)
+ {
+ default:
+ return '-';
+ case S_IFDIR:
+ return 'd';
+#ifdef S_IFLNK
+ case S_IFLNK:
+ return 'l';
+#endif
+#ifdef S_IFCHR
+ case S_IFCHR:
+ return 'c';
+#endif
+#ifdef S_IFBLK
+ case S_IFBLK:
+ return 'b';
+#endif
+#ifdef S_IFMPC
+ case S_IFMPC:
+ case S_IFMPB:
+ return 'm';
+#endif
+#ifdef S_IFSOCK
+ case S_IFSOCK:
+ return 's';
+#endif
+#ifdef S_IFIFO
+#if S_IFIFO != S_IFSOCK
+ case S_IFIFO:
+ return 'p';
+#endif
+#endif
+#ifdef S_IFNWK /* HP-UX */
+ case S_IFNWK:
+ return 'n';
+#endif
+ }
+}
+
+/* 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
+}
+
+