Import the libc fnmatch() into the kernel. This will be used by,

among other things, the DEVFS rule subsystem to match nodes against a
path pattern supplied by the user.

fnmatch.c was repo-copied from src/lib/libc/gen/fnmatch.c, and the
only changes to it are those necessary to make it compile in the
kernel.  The relevant parts of fnmatch.h were imported into libkern.h.

Approved by:	-arch

3 files changed, 23 insertions, 20 deletions

diff --git a/sys/conf/files b/sys/conf/files
index 3a282325ffce..80fbfb7496b9 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -1031,6 +1031,7 @@ libkern/index.c		standard
 libkern/inet_ntoa.c	standard
 libkern/mcount.c	optional	profiling-routine
 libkern/qsort.c		standard
+libkern/fnmatch.c	standard
 libkern/random.c	standard
 libkern/rindex.c	standard
 libkern/scanc.c		standard
diff --git a/sys/libkern/fnmatch.c b/sys/libkern/fnmatch.c
index a07a2d06e7c9..9376b22a49ad 100644
--- a/sys/libkern/fnmatch.c
+++ b/sys/libkern/fnmatch.c
@@ -32,25 +32,18 @@
  * 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.
+ *
+ * $FreeBSD$
  */
 
-#if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)fnmatch.c	8.2 (Berkeley) 4/16/94";
-#endif /* LIBC_SCCS and not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
 /*
  * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6.
  * Compares a filename or pathname to a pattern.
  */
 
-#include <ctype.h>
-#include <fnmatch.h>
-#include <string.h>
-#include <stdio.h>
-
-#include "collate.h"
+#include <sys/param.h>
+#include <sys/ctype.h>
+#include <sys/libkern.h>
 
 #define	EOS	'\0'
 
@@ -101,12 +94,12 @@ fnmatch(pattern, string, flags)
 			if (c == EOS)
 				if (flags & FNM_PATHNAME)
 					return ((flags & FNM_LEADING_DIR) ||
-					    strchr(string, '/') == NULL ?
+					    index(string, '/') == NULL ?
 					    0 : FNM_NOMATCH);
 				else
 					return (0);
 			else if (c == '/' && flags & FNM_PATHNAME) {
-				if ((string = strchr(string, '/')) == NULL)
+				if ((string = index(string, '/')) == NULL)
 					return (FNM_NOMATCH);
 				break;
 			}
@@ -218,16 +211,12 @@ rangematch(pattern, test, flags, newp)
 			if (flags & FNM_CASEFOLD)
 				c2 = tolower((unsigned char)c2);
 
-			if (__collate_load_error ?
-			    c <= test && test <= c2 :
-			       __collate_range_cmp(c, test) <= 0
-			    && __collate_range_cmp(test, c2) <= 0
-			   )
+			if (c <= test && test <= c2)
 				ok = 1;
 		} else if (c == test)
 			ok = 1;
 	} while ((c = *pattern++) != ']');
 
-	*newp = (char *)pattern;
+	*newp = (char *)(uintptr_t)pattern;
 	return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH);
 }
diff --git a/sys/sys/libkern.h b/sys/sys/libkern.h
index f050f06e2d3b..2ad98466ecb0 100644
--- a/sys/sys/libkern.h
+++ b/sys/sys/libkern.h
@@ -74,6 +74,7 @@ int	 ffs(int);
 #ifndef	HAVE_INLINE_FLS
 int	 fls(int);
 #endif
+int	 fnmatch(const char *, const char *, int);
 int	 locc(int, char *, u_int);
 void	 qsort(void *base, size_t nmemb, size_t size,
 	    int (*compar)(const void *, const void *));
@@ -113,4 +114,16 @@ memset(void *b, int c, size_t len)
 	return (b);
 }
 
+/* fnmatch() return values. */
+#define	FNM_NOMATCH	1	/* Match failed. */
+
+/* fnmatch() flags. */
+#define	FNM_NOESCAPE	0x01	/* Disable backslash escaping. */
+#define	FNM_PATHNAME	0x02	/* Slash must be matched by slash. */
+#define	FNM_PERIOD	0x04	/* Period must be matched by period. */
+#define	FNM_LEADING_DIR	0x08	/* Ignore /<tail> after Imatch. */
+#define	FNM_CASEFOLD	0x10	/* Case insensitive search. */
+#define	FNM_IGNORECASE	FNM_CASEFOLD
+#define	FNM_FILE_NAME	FNM_PATHNAME
+
 #endif /* !_SYS_LIBKERN_H_ */