auto import from //depot/cupcake/@135843

1 files changed, 291 insertions, 0 deletions

diff --git a/toolbox/cat.c b/toolbox/cat.c
new file mode 100644
index 00000000..6ac31f87
--- /dev/null
+++ b/toolbox/cat.c
@@ -0,0 +1,291 @@
+/* $NetBSD: cat.c,v 1.43 2004/01/04 03:31:28 jschauma Exp $	*/
+
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Kevin Fall.
+ *
+ * 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. 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.
+ */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define CAT_BUFSIZ (4096)
+
+static int bflag, eflag, fflag, lflag, nflag, sflag, tflag, vflag;
+static int rval;
+static const char *filename;
+
+static void
+cook_buf(FILE *fp)
+{
+	int ch, gobble, line, prev;
+	int stdout_err = 0;
+
+	line = gobble = 0;
+	for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) {
+		if (prev == '\n') {
+			if (ch == '\n') {
+				if (sflag) {
+					if (!gobble && putchar(ch) == EOF)
+						break;
+					gobble = 1;
+					continue;
+				}
+				if (nflag) {
+					if (!bflag) {
+						if (fprintf(stdout,
+						    "%6d\t", ++line) < 0) {
+							stdout_err++;
+							break;
+						}
+					} else if (eflag) {
+						if (fprintf(stdout,
+						    "%6s\t", "") < 0) {
+							stdout_err++;
+							break;
+						}
+					}
+				}
+			} else if (nflag) {
+				if (fprintf(stdout, "%6d\t", ++line) < 0) {
+					stdout_err++;
+					break;
+				}
+			}
+		}
+		gobble = 0;
+		if (ch == '\n') {
+			if (eflag)
+				if (putchar('$') == EOF)
+					break;
+		} else if (ch == '\t') {
+			if (tflag) {
+				if (putchar('^') == EOF || putchar('I') == EOF)
+					break;
+				continue;
+			}
+		} else if (vflag) {
+			if (!isascii(ch)) {
+				if (putchar('M') == EOF || putchar('-') == EOF)
+					break;
+				ch = (ch) & 0x7f;
+			}
+			if (iscntrl(ch)) {
+				if (putchar('^') == EOF ||
+				    putchar(ch == '\177' ? '?' :
+				    ch | 0100) == EOF)
+					break;
+				continue;
+			}
+		}
+		if (putchar(ch) == EOF)
+			break;
+	}
+	if (stdout_err) {
+		perror(filename);
+		rval = 1;
+	}
+}
+
+static void
+cook_args(char **argv)
+{
+	FILE *fp;
+
+	fp = stdin;
+	filename = "stdin";
+	do {
+		if (*argv) {
+			if (!strcmp(*argv, "-"))
+				fp = stdin;
+			else if ((fp = fopen(*argv,
+			    fflag ? "rf" : "r")) == NULL) {
+				perror("fopen");
+				rval = 1;
+				++argv;
+				continue;
+			}
+			filename = *argv++;
+		}
+		cook_buf(fp);
+		if (fp != stdin)
+			fclose(fp);
+	} while (*argv);
+}
+
+static void
+raw_cat(int rfd)
+{
+	static char *buf;
+	static char fb_buf[CAT_BUFSIZ];
+	static size_t bsize;
+
+	struct stat sbuf;
+	ssize_t nr, nw, off;
+	int wfd;
+
+	wfd = fileno(stdout);
+	if (buf == NULL) {
+		if (fstat(wfd, &sbuf) == 0) {
+			bsize = sbuf.st_blksize > CAT_BUFSIZ ?
+			    sbuf.st_blksize : CAT_BUFSIZ;
+			buf = malloc(bsize);
+		}
+		if (buf == NULL) {
+			buf = fb_buf;
+			bsize = CAT_BUFSIZ;
+		}
+	}
+	while ((nr = read(rfd, buf, bsize)) > 0)
+		for (off = 0; nr; nr -= nw, off += nw)
+			if ((nw = write(wfd, buf + off, (size_t)nr)) < 0)
+			{
+				perror("write");
+				exit(EXIT_FAILURE);
+			}
+	if (nr < 0) {
+		fprintf(stderr,"%s: invalid length\n", filename);
+		rval = 1;
+	}
+}
+
+static void
+raw_args(char **argv)
+{
+	int fd;
+
+	fd = fileno(stdin);
+	filename = "stdin";
+	do {
+		if (*argv) {
+			if (!strcmp(*argv, "-"))
+				fd = fileno(stdin);
+			else if (fflag) {
+				struct stat st;
+				fd = open(*argv, O_RDONLY|O_NONBLOCK, 0);
+				if (fd < 0)
+					goto skip;
+
+				if (fstat(fd, &st) == -1) {
+					close(fd);
+					goto skip;
+				}
+				if (!S_ISREG(st.st_mode)) {
+					close(fd);
+					errno = EINVAL;
+					goto skipnomsg;
+				}
+			}
+			else if ((fd = open(*argv, O_RDONLY, 0)) < 0) {
+skip:
+				perror(*argv);
+skipnomsg:
+				rval = 1;
+				++argv;
+				continue;
+			}
+			filename = *argv++;
+		}
+		raw_cat(fd);
+		if (fd != fileno(stdin))
+			close(fd);
+	} while (*argv);
+}
+
+int
+cat_main(int argc, char *argv[])
+{
+	int ch;
+	struct flock stdout_lock;
+
+	while ((ch = getopt(argc, argv, "beflnstv")) != -1)
+		switch (ch) {
+		case 'b':
+			bflag = nflag = 1;	/* -b implies -n */
+			break;
+		case 'e':
+			eflag = vflag = 1;	/* -e implies -v */
+			break;
+		case 'f':
+			fflag = 1;
+			break;
+		case 'l':
+			lflag = 1;
+			break;
+		case 'n':
+			nflag = 1;
+			break;
+		case 's':
+			sflag = 1;
+			break;
+		case 't':
+			tflag = vflag = 1;	/* -t implies -v */
+			break;
+		case 'v':
+			vflag = 1;
+			break;
+		default:
+		case '?':
+			fprintf(stderr,
+				"usage: cat [-beflnstv] [-] [file ...]\n");
+			exit(EXIT_FAILURE);
+		}
+	argv += optind;
+
+	if (lflag) {
+		stdout_lock.l_len = 0;
+		stdout_lock.l_start = 0;
+		stdout_lock.l_type = F_WRLCK;
+		stdout_lock.l_whence = SEEK_SET;
+		if (fcntl(STDOUT_FILENO, F_SETLKW, &stdout_lock) == -1)
+		{
+			perror("fcntl");
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	if (bflag || eflag || nflag || sflag || tflag || vflag)
+		cook_args(argv);
+	else
+		raw_args(argv);
+	if (fclose(stdout))
+	{
+		perror("fclose");
+		exit(EXIT_FAILURE);
+	}
+	exit(rval);
+}