BSD 4.4 Lite Usr.bin Sources

1 files changed, 216 insertions, 0 deletions

diff --git a/usr.bin/strings/strings.c b/usr.bin/strings/strings.c
new file mode 100644
index 0000000..398ccac
--- /dev/null
+++ b/usr.bin/strings/strings.c
@@ -0,0 +1,216 @@
+/*
+ * Copyright (c) 1980, 1987, 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, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)strings.c	8.2 (Berkeley) 1/28/94";
+#endif /* not lint */
+
+#include <sys/types.h>
+
+#include <a.out.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define DEF_LEN		4		/* default minimum string length */
+#define ISSTR(ch)	(isascii(ch) && (isprint(ch) || ch == '\t'))
+
+typedef struct exec	EXEC;		/* struct exec cast */
+
+static long	foff;			/* offset in the file */
+static int	hcnt,			/* head count */
+		head_len,		/* length of header */
+		read_len;		/* length to read */
+static u_char	hbfr[sizeof(EXEC)];	/* buffer for struct exec */
+
+static void usage();
+
+main(argc, argv)
+	int argc;
+	char **argv;
+{
+	extern char *optarg;
+	extern int optind;
+	register int ch, cnt;
+	register u_char *C;
+	EXEC *head;
+	int exitcode, minlen;
+	short asdata, oflg, fflg;
+	u_char *bfr;
+	char *file, *p;
+
+	/*
+	 * for backward compatibility, allow '-' to specify 'a' flag; no
+	 * longer documented in the man page or usage string.
+	 */
+	asdata = exitcode = fflg = oflg = 0;
+	minlen = -1;
+	while ((ch = getopt(argc, argv, "-0123456789an:of")) != EOF)
+		switch (ch) {
+		case '0': case '1': case '2': case '3': case '4':
+		case '5': case '6': case '7': case '8': case '9':
+			/*
+			 * kludge: strings was originally designed to take
+			 * a number after a dash.
+			 */
+			if (minlen == -1) {
+				p = argv[optind - 1];
+				if (p[0] == '-' && p[1] == ch && !p[2])
+					minlen = atoi(++p);
+				else
+					minlen = atoi(argv[optind] + 1);
+			}
+			break;
+		case '-':
+		case 'a':
+			asdata = 1;
+			break;
+		case 'f':
+			fflg = 1;
+			break;
+		case 'n':
+			minlen = atoi(optarg);
+			break;
+		case 'o':
+			oflg = 1;
+			break;
+		case '?':
+		default:
+			usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+	if (minlen == -1)
+		minlen = DEF_LEN;
+	else {
+		(void)fprintf(stderr, "strings: length less than 1\n");
+		exit (1);
+	}
+
+	if (!(bfr = malloc((u_int)minlen))) {
+		(void)fprintf(stderr, "strings: %s\n", strerror(errno));
+		exit(1);
+	}
+	bfr[minlen] = '\0';
+	file = "stdin";
+	do {
+		if (*argv) {
+			file = *argv++;
+			if (!freopen(file, "r", stdin)) {
+				(void)fprintf(stderr,
+				    "strings: %s: %s\n", file, strerror(errno));
+				exitcode = 1;
+				goto nextfile;
+			}
+		}
+		foff = 0;
+#define DO_EVERYTHING()		{read_len = -1; head_len = 0; goto start;}
+		read_len = -1;
+		if (asdata)
+			DO_EVERYTHING()
+		else {
+			head = (EXEC *)hbfr;
+			if ((head_len =
+			    read(fileno(stdin), head, sizeof(EXEC))) == -1)
+				DO_EVERYTHING()
+			if (head_len == sizeof(EXEC) && !N_BADMAG(*head)) {
+				foff = N_TXTOFF(*head);
+				if (fseek(stdin, foff, SEEK_SET) == -1)
+					DO_EVERYTHING()
+				read_len = head->a_text + head->a_data;
+				head_len = 0;
+			}
+			else
+				hcnt = 0;
+		}
+start:
+		for (cnt = 0; (ch = getch()) != EOF;) {
+			if (ISSTR(ch)) {
+				if (!cnt)
+					C = bfr;
+				*C++ = ch;
+				if (++cnt < minlen)
+					continue;
+				if (fflg)
+					printf("%s:", file);
+				if (oflg)
+					printf("%07ld %s",
+					    foff - minlen, (char *)bfr);
+				else
+					printf("%s", bfr);
+				while ((ch = getch()) != EOF && ISSTR(ch))
+					putchar((char)ch);
+				putchar('\n');
+			}
+			cnt = 0;
+		}
+nextfile: ;
+	} while (*argv);
+	exit(exitcode);
+}
+
+/*
+ * getch --
+ *	get next character from wherever
+ */
+getch()
+{
+	++foff;
+	if (head_len) {
+		if (hcnt < head_len)
+			return((int)hbfr[hcnt++]);
+		head_len = 0;
+	}
+	if (read_len == -1 || read_len-- > 0)
+		return(getchar());
+	return(EOF);
+}
+
+static void
+usage()
+{
+	(void)fprintf(stderr,
+	    "usage: strings [-afo] [-n length] [file ... ]\n");
+	exit(1);
+}