BSD 4.4 Lite Usr.bin Sources

1 files changed, 243 insertions, 0 deletions

diff --git a/usr.bin/wc/wc.c b/usr.bin/wc/wc.c
new file mode 100644
index 0000000..a50196c
--- /dev/null
+++ b/usr.bin/wc/wc.c
@@ -0,0 +1,243 @@
+/*
+ * Copyright (c) 1980, 1987, 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.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1980, 1987, 1991, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)wc.c	8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+u_long tlinect, twordct, tcharct;
+int doline, doword, dochar;
+
+void cnt __P((char *));
+void err __P((const char *, ...));
+void usage __P((void));
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	register int ch;
+	int total;
+
+	while ((ch = getopt(argc, argv, "lwc")) != EOF)
+		switch((char)ch) {
+		case 'l':
+			doline = 1;
+			break;
+		case 'w':
+			doword = 1;
+			break;
+		case 'c':
+			dochar = 1;
+			break;
+		case '?':
+		default:
+			usage();
+		}
+	argv += optind;
+	argc -= optind;
+
+	/* Wc's flags are on by default. */
+	if (doline + doword + dochar == 0)
+		doline = doword = dochar = 1;
+
+	total = 0;
+	if (!*argv) {
+		cnt(NULL);
+		(void)printf("\n");
+	}
+	else do {
+		cnt(*argv);
+		(void)printf(" %s\n", *argv);
+		++total;
+	} while(*++argv);
+
+	if (total > 1) {
+		if (doline)
+			(void)printf(" %7ld", tlinect);
+		if (doword)
+			(void)printf(" %7ld", twordct);
+		if (dochar)
+			(void)printf(" %7ld", tcharct);
+		(void)printf(" total\n");
+	}
+	exit(0);
+}
+
+void
+cnt(file)
+	char *file;
+{
+	register u_char *p;
+	register short gotsp;
+	register int ch, len;
+	register u_long linect, wordct, charct;
+	struct stat sb;
+	int fd;
+	u_char buf[MAXBSIZE];
+
+	fd = STDIN_FILENO;
+	linect = wordct = charct = 0;
+	if (file) {
+		if ((fd = open(file, O_RDONLY, 0)) < 0)
+			err("%s: %s", file, strerror(errno));
+		if (doword)
+			goto word;
+		/*
+		 * Line counting is split out because it's a lot faster to get
+		 * lines than to get words, since the word count requires some
+		 * logic.
+		 */
+		if (doline) {
+			while (len = read(fd, buf, MAXBSIZE)) {
+				if (len == -1)
+					err("%s: %s", file, strerror(errno));
+				charct += len;
+				for (p = buf; len--; ++p)
+					if (*p == '\n')
+						++linect;
+			}
+			tlinect += linect;
+			(void)printf(" %7lu", linect);
+			if (dochar) {
+				tcharct += charct;
+				(void)printf(" %7lu", charct);
+			}
+			(void)close(fd);
+			return;
+		}
+		/*
+		 * If all we need is the number of characters and it's a
+		 * regular or linked file, just stat the puppy.
+		 */
+		if (dochar) {
+			if (fstat(fd, &sb))
+				err("%s: %s", file, strerror(errno));
+			if (S_ISREG(sb.st_mode) || S_ISLNK(sb.st_mode)) {
+				(void)printf(" %7qu", sb.st_size);
+				tcharct += sb.st_size;
+				(void)close(fd);
+				return;
+			}
+		}
+	}
+
+	/* Do it the hard way... */
+word:	for (gotsp = 1; len = read(fd, buf, MAXBSIZE);) {
+		if (len == -1)
+			err("%s: %s", file, strerror(errno));
+		/*
+		 * This loses in the presence of multi-byte characters.
+		 * To do it right would require a function to return a
+		 * character while knowing how many bytes it consumed.
+		 */
+		charct += len;
+		for (p = buf; len--;) {
+			ch = *p++;
+			if (ch == '\n')
+				++linect;
+			if (isspace(ch))
+				gotsp = 1;
+			else if (gotsp) {
+				gotsp = 0;
+				++wordct;
+			}
+		}
+	}
+	if (doline) {
+		tlinect += linect;
+		(void)printf(" %7lu", linect);
+	}
+	if (doword) {
+		twordct += wordct;
+		(void)printf(" %7lu", wordct);
+	}
+	if (dochar) {
+		tcharct += charct;
+		(void)printf(" %7lu", charct);
+	}
+	(void)close(fd);
+}
+
+void
+usage()
+{
+	(void)fprintf(stderr, "usage: wc [-clw] [files]\n");
+	exit(1);
+}
+
+#if __STDC__
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+
+void
+#if __STDC__
+err(const char *fmt, ...)
+#else
+err(fmt, va_alist)
+	char *fmt;
+        va_dcl
+#endif
+{
+	va_list ap;
+#if __STDC__
+	va_start(ap, fmt);
+#else
+	va_start(ap);
+#endif
+	(void)fprintf(stderr, "wc: ");
+	(void)vfprintf(stderr, fmt, ap);
+	va_end(ap);
+	(void)fprintf(stderr, "\n");
+	exit(1);
+	/* NOTREACHED */
+}