initial import of NetBSD tree

1 files changed, 223 insertions, 0 deletions

diff --git a/usr.bin/vi/ex/ex_cd.c b/usr.bin/vi/ex/ex_cd.c
new file mode 100644
index 00000000000..8a3d0f1b5b4
--- /dev/null
+++ b/usr.bin/vi/ex/ex_cd.c
@@ -0,0 +1,223 @@
+/*-
+ * Copyright (c) 1992, 1993, 1994
+ *	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 sccsid[] = "@(#)ex_cd.c	8.18 (Berkeley) 8/17/94";
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/queue.h>
+#include <sys/time.h>
+
+#include <bitstring.h>
+#include <errno.h>
+#include <limits.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include "compat.h"
+#include <db.h>
+#include <regex.h>
+
+#include "vi.h"
+#include "excmd.h"
+
+/*
+ * ex_cd -- :cd[!] [directory]
+ *	Change directories.
+ */
+int
+ex_cd(sp, ep, cmdp)
+	SCR *sp;
+	EXF *ep;
+	EXCMDARG *cmdp;
+{
+	struct passwd *pw;
+	ARGS *ap;
+	CDPATH *cdp;
+	char *dir;		/* XXX END OF THE STACK, DON'T TRUST GETCWD. */
+	char buf[MAXPATHLEN * 2];
+
+	/*
+	 * !!!
+	 * Historic practice is that the cd isn't attempted if the file has
+	 * been modified, unless its name begins with a leading '/' or the
+	 * force flag is set.
+	 */
+	if (F_ISSET(ep, F_MODIFIED) &&
+	    !F_ISSET(cmdp, E_FORCE) && sp->frp->name[0] != '/') {
+		msgq(sp, M_ERR,
+    "File modified since last complete write; write or use ! to override");
+		return (1);
+	}
+
+	switch (cmdp->argc) {
+	case 0:
+		/* If no argument, change to the user's home directory. */
+		if ((dir = getenv("HOME")) == NULL) {
+			if ((pw = getpwuid(getuid())) == NULL ||
+			    pw->pw_dir == NULL || pw->pw_dir[0] == '\0') {
+				msgq(sp, M_ERR,
+			   "Unable to find home directory location");
+				return (1);
+			}
+			dir = pw->pw_dir;
+		}
+		break;
+	case 1:
+		dir = cmdp->argv[0]->bp;
+		break;
+	default:
+		abort();
+	}
+
+	/* Try the current directory first. */
+	if (!chdir(dir))
+		goto ret;
+
+	/*
+	 * If moving to the user's home directory, or, the path begins with
+	 * "/", "./" or "../", it's the only place we try.
+	 */
+	if (cmdp->argc == 0 ||
+	    (ap = cmdp->argv[0])->bp[0] == '/' ||
+	    ap->len == 1 && ap->bp[0] == '.' ||
+	    ap->len >= 2 && ap->bp[0] == '.' && ap->bp[1] == '.' &&
+	    (ap->bp[2] == '/' || ap->bp[2] == '\0'))
+		goto err;
+
+	/* If the user has a CDPATH variable, try its elements. */
+	for (cdp = EXP(sp)->cdq.tqh_first; cdp != NULL; cdp = cdp->q.tqe_next) {
+		(void)snprintf(buf, sizeof(buf), "%s/%s", cdp->path, dir);
+		if (!chdir(buf)) {
+ret:			if (getcwd(buf, sizeof(buf)) != NULL)
+				msgq(sp, M_INFO, "New directory: %s", buf);
+			return (0);
+		}
+	}
+err:	msgq(sp, M_SYSERR, "%s", dir);
+	return (1);
+}
+
+#define	FREE_CDPATH(cdp) {						\
+	TAILQ_REMOVE(&exp->cdq, (cdp), q);				\
+	free((cdp)->path);						\
+	FREE((cdp), sizeof(CDPATH));					\
+}
+/*
+ * ex_cdalloc --
+ *	Create a new list of cd paths.
+ */
+int
+ex_cdalloc(sp, str)
+	SCR *sp;
+	char *str;
+{
+	EX_PRIVATE *exp;
+	CDPATH *cdp;
+	size_t len;
+	int founddot;
+	char *p, *t;
+
+	/* Free current queue. */
+	exp = EXP(sp);
+	while ((cdp = exp->cdq.tqh_first) != NULL)
+		FREE_CDPATH(cdp);
+
+	/*
+	 * Create new queue.  The CDPATH environmental variable (and the
+	 * user's manual entry) are delimited by colon characters.
+	 */
+	for (p = t = str, founddot = 0;; ++p) {
+		if (*p == '\0' || *p == ':') {
+			/*
+			 * Empty strings specify ".".  The only way to get an
+			 * empty string is a leading colon, colons in a row,
+			 * or a trailing colon.  Or, to put it the other way,
+			 * if the the length is zero, then it's either ":XXX",
+			 * "XXX::XXXX" , "XXX:", or "", and the only failure
+			 * mode is the last one.  Note, the string ":" gives
+			 * us two entries of '.', so we only include one of
+			 * them.
+			 */
+			if ((len = p - t) == 0) {
+				if (p == str && *p == '\0')
+					break;
+				if (founddot) {
+					if (*p == '\0')
+						break;
+					continue;
+				}
+				len = 1;
+				t = ".";
+				founddot = 1;
+			}
+			MALLOC_RET(sp, cdp, CDPATH *, sizeof(CDPATH));
+			MALLOC(sp, cdp->path, char *, len + 1);
+			if (cdp->path == NULL) {
+				free(cdp);
+				return (1);
+			}
+			memmove(cdp->path, t, len);
+			cdp->path[len] = '\0';
+			TAILQ_INSERT_TAIL(&exp->cdq, cdp, q);
+			t = p + 1;
+		}
+		if (*p == '\0')
+			 break;
+	}
+	return (0);
+}
+						/* Free previous queue. */
+/*
+ * ex_cdfree --
+ *	Free the cd path list.
+ */
+int
+ex_cdfree(sp)
+	SCR *sp;
+{
+	EX_PRIVATE *exp;
+	CDPATH *cdp;
+
+	/* Free up cd path information. */
+	exp = EXP(sp);
+	while ((cdp = exp->cdq.tqh_first) != NULL)
+		FREE_CDPATH(cdp);
+	return (0);
+}