2 files changed, 301 insertions, 0 deletions

diff --git a/lib/libc/string/strmode.3 b/lib/libc/string/strmode.3
new file mode 100644
index 000000000000..43d0cf173b51
--- /dev/null
+++ b/lib/libc/string/strmode.3
@@ -0,0 +1,149 @@
+.\" Copyright (c) 1990, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)strmode.3	8.3 (Berkeley) 7/28/94
+.\"
+.Dd July 28, 1994
+.Dt STRMODE 3
+.Os
+.Sh NAME
+.Nm strmode
+.Nd convert inode status information into a symbolic string
+.Sh SYNOPSIS
+.Fd #include <string.h>
+.Ft void
+.Fn strmode "mode_t mode" "char *bp"
+.Sh DESCRIPTION
+The
+.Fn strmode
+function
+converts a file
+.Fa mode
+(the type and permission information associated with an inode, see
+.Xr stat 2 )
+into a symbolic string which is stored in the location referenced by
+.Fa bp .
+This stored string is eleven characters in length plus a trailing
+.Dv NULL .
+.Pp
+The first character is the inode type, and will be one of the following:
+.Pp
+.Bl -tag -width flag -offset indent -compact
+.It \-
+regular file
+.It b
+block special
+.It c
+character special
+.It d
+directory
+.It l
+symbolic link
+.It p
+fifo
+.It s
+socket
+.It w
+whiteout
+.It ?
+unknown inode type
+.El
+.Pp
+The next nine characters encode three sets of permissions, in three
+characters each.
+The first three characters are the permissions for the owner of the
+file, the second three for the group the file belongs to, and the
+third for the ``other'', or default, set of users.
+.Pp
+Permission checking is done as specifically as possible.
+If read permission is denied to the owner of a file in the first set
+of permissions, the owner of the file will not be able to read the file.
+This is true even if the owner is in the file's group and the group
+permissions allow reading or the ``other'' permissions allow reading.
+.Pp
+If the first character of the three character set is an ``r'', the file is
+readable for that set of users; if a dash ``\-'', it is not readable.
+.Pp
+If the second character of the three character set is a ``w'', the file is
+writable for that set of users; if a dash ``\-'', it is not writable.
+.Pp
+The third character is the first of the following characters that apply:
+.Bl -tag -width xxxx
+.It S
+If the character is part of the owner permissions and the file is not
+executable or the directory is not searchable by the owner, and the
+set-user-id bit is set.
+.It S
+If the character is part of the group permissions and the file is not
+executable or the directory is not searchable by the group, and the
+set-group-id bit is set.
+.It T
+If the character is part of the other permissions and the file is not
+executable or the directory is not searchable by others, and the ``sticky''
+.Pq Dv S_ISVTX
+bit is set.
+.It s
+If the character is part of the owner permissions and the file is
+executable or the directory searchable by the owner, and the set-user-id
+bit is set.
+.It s
+If the character is part of the group permissions and the file is
+executable or the directory searchable by the group, and the set-group-id
+bit is set.
+.It t
+If the character is part of the other permissions and the file is
+executable or the directory searchable by others, and the ``sticky''
+.Pq Dv S_ISVTX
+bit is set.
+.It x
+The file is executable or the directory is searchable.
+.It \-
+None of the above apply.
+.El
+.Pp
+The last character is a plus sign ``+'' if any there are any alternate
+or additional access control methods associated with the inode, otherwise
+it will be a space.
+.Sh RETURN VALUES
+The
+.Fn strmode
+function
+always returns 0.
+.Sh SEE ALSO
+.Xr chmod 1 ,
+.Xr find 1 ,
+.Xr stat 2 ,
+.Xr getmode 3 ,
+.Xr setmode 3
+.Sh HISTORY
+The
+.Fn strmode
+function first appeared in 4.4BSD.
diff --git a/lib/libc/string/strmode.c b/lib/libc/string/strmode.c
new file mode 100644
index 000000000000..2c3f44a94561
--- /dev/null
+++ b/lib/libc/string/strmode.c
@@ -0,0 +1,152 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)strmode.c	8.3 (Berkeley) 8/15/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <string.h>
+
+void
+strmode(mode, p)
+	register mode_t mode;
+	register char *p;
+{
+	 /* print type */
+	switch (mode & S_IFMT) {
+	case S_IFDIR:			/* directory */
+		*p++ = 'd';
+		break;
+	case S_IFCHR:			/* character special */
+		*p++ = 'c';
+		break;
+	case S_IFBLK:			/* block special */
+		*p++ = 'b';
+		break;
+	case S_IFREG:			/* regular */
+		*p++ = '-';
+		break;
+	case S_IFLNK:			/* symbolic link */
+		*p++ = 'l';
+		break;
+	case S_IFSOCK:			/* socket */
+		*p++ = 's';
+		break;
+#ifdef S_IFIFO
+	case S_IFIFO:			/* fifo */
+		*p++ = 'p';
+		break;
+#endif
+#ifdef S_IFWHT
+	case S_IFWHT:			/* whiteout */
+		*p++ = 'w';
+		break;
+#endif
+	default:			/* unknown */
+		*p++ = '?';
+		break;
+	}
+	/* usr */
+	if (mode & S_IRUSR)
+		*p++ = 'r';
+	else
+		*p++ = '-';
+	if (mode & S_IWUSR)
+		*p++ = 'w';
+	else
+		*p++ = '-';
+	switch (mode & (S_IXUSR | S_ISUID)) {
+	case 0:
+		*p++ = '-';
+		break;
+	case S_IXUSR:
+		*p++ = 'x';
+		break;
+	case S_ISUID:
+		*p++ = 'S';
+		break;
+	case S_IXUSR | S_ISUID:
+		*p++ = 's';
+		break;
+	}
+	/* group */
+	if (mode & S_IRGRP)
+		*p++ = 'r';
+	else
+		*p++ = '-';
+	if (mode & S_IWGRP)
+		*p++ = 'w';
+	else
+		*p++ = '-';
+	switch (mode & (S_IXGRP | S_ISGID)) {
+	case 0:
+		*p++ = '-';
+		break;
+	case S_IXGRP:
+		*p++ = 'x';
+		break;
+	case S_ISGID:
+		*p++ = 'S';
+		break;
+	case S_IXGRP | S_ISGID:
+		*p++ = 's';
+		break;
+	}
+	/* other */
+	if (mode & S_IROTH)
+		*p++ = 'r';
+	else
+		*p++ = '-';
+	if (mode & S_IWOTH)
+		*p++ = 'w';
+	else
+		*p++ = '-';
+	switch (mode & (S_IXOTH | S_ISVTX)) {
+	case 0:
+		*p++ = '-';
+		break;
+	case S_IXOTH:
+		*p++ = 'x';
+		break;
+	case S_ISVTX:
+		*p++ = 'T';
+		break;
+	case S_IXOTH | S_ISVTX:
+		*p++ = 't';
+		break;
+	}
+	*p++ = ' ';		/* will be a '+' if ACL's implemented */
+	*p = '\0';
+}