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diff --git a/usr.bin/mail/edit.c b/usr.bin/mail/edit.c
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+/*
+ * Copyright (c) 1980, 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 sccsid[] = "@(#)edit.c 8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+#include "rcv.h"
+#include <fcntl.h>
+#include "extern.h"
+
+/*
+ * Mail -- a mail program
+ *
+ * Perform message editing functions.
+ */
+
+/*
+ * Edit a message list.
+ */
+int
+editor(msgvec)
+ int *msgvec;
+{
+
+ return edit1(msgvec, 'e');
+}
+
+/*
+ * Invoke the visual editor on a message list.
+ */
+int
+visual(msgvec)
+ int *msgvec;
+{
+
+ return edit1(msgvec, 'v');
+}
+
+/*
+ * Edit a message by writing the message into a funnily-named file
+ * (which should not exist) and forking an editor on it.
+ * We get the editor from the stuff above.
+ */
+int
+edit1(msgvec, type)
+ int *msgvec;
+ int type;
+{
+ register int c;
+ int i;
+ FILE *fp;
+ register struct message *mp;
+ off_t size;
+
+ /*
+ * Deal with each message to be edited . . .
+ */
+ for (i = 0; msgvec[i] && i < msgCount; i++) {
+ sig_t sigint;
+
+ if (i > 0) {
+ char buf[100];
+ char *p;
+
+ printf("Edit message %d [ynq]? ", msgvec[i]);
+ if (fgets(buf, sizeof buf, stdin) == 0)
+ break;
+ for (p = buf; *p == ' ' || *p == '\t'; p++)
+ ;
+ if (*p == 'q')
+ break;
+ if (*p == 'n')
+ continue;
+ }
+ dot = mp = &message[msgvec[i] - 1];
+ touch(mp);
+ sigint = signal(SIGINT, SIG_IGN);
+ fp = run_editor(setinput(mp), mp->m_size, type, readonly);
+ if (fp != NULL) {
+ (void) fseek(otf, 0L, 2);
+ size = ftell(otf);
+ mp->m_block = blockof(size);
+ mp->m_offset = offsetof(size);
+ mp->m_size = fsize(fp);
+ mp->m_lines = 0;
+ mp->m_flag |= MODIFY;
+ rewind(fp);
+ while ((c = getc(fp)) != EOF) {
+ if (c == '\n')
+ mp->m_lines++;
+ if (putc(c, otf) == EOF)
+ break;
+ }
+ if (ferror(otf))
+ perror("/tmp");
+ (void) Fclose(fp);
+ }
+ (void) signal(SIGINT, sigint);
+ }
+ return 0;
+}
+
+/*
+ * Run an editor on the file at "fpp" of "size" bytes,
+ * and return a new file pointer.
+ * Signals must be handled by the caller.
+ * "Type" is 'e' for _PATH_EX, 'v' for _PATH_VI.
+ */
+FILE *
+run_editor(fp, size, type, readonly)
+ register FILE *fp;
+ off_t size;
+ int type, readonly;
+{
+ register FILE *nf = NULL;
+ register int t;
+ time_t modtime;
+ char *edit;
+ struct stat statb;
+ extern char tempEdit[];
+
+ if ((t = creat(tempEdit, readonly ? 0400 : 0600)) < 0) {
+ perror(tempEdit);
+ goto out;
+ }
+ if ((nf = Fdopen(t, "w")) == NULL) {
+ perror(tempEdit);
+ (void) unlink(tempEdit);
+ goto out;
+ }
+ if (size >= 0)
+ while (--size >= 0 && (t = getc(fp)) != EOF)
+ (void) putc(t, nf);
+ else
+ while ((t = getc(fp)) != EOF)
+ (void) putc(t, nf);
+ (void) fflush(nf);
+ if (fstat(fileno(nf), &statb) < 0)
+ modtime = 0;
+ else
+ modtime = statb.st_mtime;
+ if (ferror(nf)) {
+ (void) Fclose(nf);
+ perror(tempEdit);
+ (void) unlink(tempEdit);
+ nf = NULL;
+ goto out;
+ }
+ if (Fclose(nf) < 0) {
+ perror(tempEdit);
+ (void) unlink(tempEdit);
+ nf = NULL;
+ goto out;
+ }
+ nf = NULL;
+ if ((edit = value(type == 'e' ? "EDITOR" : "VISUAL")) == NOSTR)
+ edit = type == 'e' ? _PATH_EX : _PATH_VI;
+ if (run_command(edit, 0, -1, -1, tempEdit, NOSTR, NOSTR) < 0) {
+ (void) unlink(tempEdit);
+ goto out;
+ }
+ /*
+ * If in read only mode or file unchanged, just remove the editor
+ * temporary and return.
+ */
+ if (readonly) {
+ (void) unlink(tempEdit);
+ goto out;
+ }
+ if (stat(tempEdit, &statb) < 0) {
+ perror(tempEdit);
+ goto out;
+ }
+ if (modtime == statb.st_mtime) {
+ (void) unlink(tempEdit);
+ goto out;
+ }
+ /*
+ * Now switch to new file.
+ */
+ if ((nf = Fopen(tempEdit, "a+")) == NULL) {
+ perror(tempEdit);
+ (void) unlink(tempEdit);
+ goto out;
+ }
+ (void) unlink(tempEdit);
+out:
+ return nf;
+}
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