X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/44232d5b51d0e89cd8d1dac22e80bc97c44dbc70..75de0e71c0e903f8f9013ff459a196798b6f7a3f:/usr/src/usr.bin/ex/ex.c

diff --git a/usr/src/usr.bin/ex/ex.c b/usr/src/usr.bin/ex/ex.c
index e74b5c046c..169612f1cc 100644
--- a/usr/src/usr.bin/ex/ex.c
+++ b/usr/src/usr.bin/ex/ex.c
@@ -1,4 +1,5 @@
-/* Copyright (c) 1979 Regents of the University of California */
+/* Copyright (c) 1981 Regents of the University of California */
+static char *sccsid = "@(#)ex.c	7.1	%G%";
 #include "ex.h"
 #include "ex_argv.h"
 #include "ex_temp.h"
@@ -52,6 +53,8 @@ char	tttrace[]	= { '/','d','e','v','/','t','t','y','x','x',0 };
  *			data base, grabbing of tty modes (at beginning
  *			and after escapes).
  *
+ * ex_unix.c		Routines for the ! command and its variations.
+ *
  * ex_v*.c		Visual/open mode routines... see ex_v.c for a
  *			guide to the overall organization.
  */
@@ -59,12 +62,11 @@ char	tttrace[]	= { '/','d','e','v','/','t','t','y','x','x',0 };
 /*
  * Main procedure.  Process arguments and then
  * transfer control to the main command processing loop
- * in the routine commands.  We are entered as either "ex", "edit" or "vi"
- * and the distinction is made here.  Actually, we are "vi" if
- * there is a 'v' in our name, and "edit" if there is a 'd' in our
- * name.  For edit we just diddle options; for vi we actually
- * force an early visual command, setting the external initev so
- * the q command in visual doesn't give command mode.
+ * in the routine commands.  We are entered as either "ex", "edit", "vi"
+ * or "view" and the distinction is made here.  Actually, we are "vi" if
+ * there is a 'v' in our name, "view" is there is a 'w', and "edit" if
+ * there is a 'd' in our name.  For edit we just diddle options;
+ * for vi we actually force an early visual command.
  */
 main(ac, av)
 	register int ac;
@@ -79,6 +81,7 @@ main(ac, av)
 	bool ivis;
 	bool itag = 0;
 	bool fast = 0;
+	extern int onemt();
 #ifdef TRACE
 	register char *tracef;
 #endif
@@ -88,33 +91,37 @@ main(ac, av)
 	 * get messed up if an interrupt comes in quickly.
 	 */
 	gTTY(1);
+#ifndef USG3TTY
 	normf = tty.sg_flags;
+#else
+	normf = tty;
+#endif
 	ppid = getpid();
 	/*
-	 * Defend against d's, v's, and a's in directories of
+	 * Defend against d's, v's, w's, and a's in directories of
 	 * path leading to our true name.
 	 */
 	av[0] = tailpath(av[0]);
-	ivis = any('v', av[0]);
 
 	/*
-	 * For debugging take files out of . if name is a.out.
-	 * If a 'd' in our name, then set options for edit.
+	 * Figure out how we were invoked: ex, edit, vi, view.
 	 */
-#ifndef VMUNIX
-	if (av[0][0] == 'a')
-		erpath = tailpath(erpath);
-#endif
-	if (ivis) {
-#ifdef notdef
-		options[BEAUTIFY].odefault = value(BEAUTIFY) = 1;
-#endif
-	} else if (any('d', av[0])) {
+	ivis = any('v', av[0]);	/* "vi" */
+	if (any('w', av[0]))	/* "view" */
+		value(READONLY) = 1;
+	if (any('d', av[0])) {	/* "edit" */
 		value(OPEN) = 0;
 		value(REPORT) = 1;
 		value(MAGIC) = 0;
 	}
 
+#ifndef VMUNIX
+	/*
+	 * For debugging take files out of . if name is a.out.
+	 */
+	if (av[0][0] == 'a')
+		erpath = tailpath(erpath);
+#endif
 	/*
 	 * Open the error message file.
 	 */
@@ -137,6 +144,8 @@ main(ac, av)
 	ruptible = signal(SIGINT, SIG_IGN) == SIG_DFL;
 	if (signal(SIGTERM, SIG_IGN) == SIG_DFL)
 		signal(SIGTERM, onhup);
+	if (signal(SIGEMT, SIG_IGN) == SIG_DFL)
+		signal(SIGEMT, onemt);
 
 	/*
 	 * Initialize end of core pointers.
@@ -161,6 +170,10 @@ main(ac, av)
 			fast++;
 		} else switch (c) {
 
+		case 'R':
+			value(READONLY) = 1;
+			break;
+
 #ifdef TRACE
 		case 'T':
 			if (av[0][2] == 0)
@@ -174,9 +187,11 @@ main(ac, av)
 					tracef[9] = 0;
 			}
 			trace = fopen(tracef, "w");
+#define tracbuf NULL
 			if (trace == NULL)
 				printf("Trace create error\n");
-			setbuf(trace, tracbuf);
+			else
+				setbuf(trace, tracbuf);
 			break;
 
 #endif
@@ -212,17 +227,37 @@ main(ac, av)
 				defwind = 10*defwind + *cp - '0';
 			break;
 
+#ifdef CRYPT
+		case 'x':
+			/* -x: encrypted mode */
+			xflag = 1;
+			break;
+#endif
+
 		default:
 			smerror("Unknown option %s\n", av[0]);
 			break;
 		}
 		ac--, av++;
 	}
+
+#ifdef SIGTSTP
+	if (!hush && signal(SIGTSTP, SIG_IGN) == SIG_DFL)
+		signal(SIGTSTP, onsusp), dosusp++;
+#endif
+
 	if (ac && av[0][0] == '+') {
 		firstpat = &av[0][1];
 		ac--, av++;
 	}
 
+#ifdef CRYPT
+	if(xflag){
+		key = getpass(KEYPROMPT);
+		kflag = crinit(key, perm);
+	}
+#endif
+
 	/*
 	 * If we are doing a recover and no filename
 	 * was given, then execute an exrecover command with
@@ -253,24 +288,37 @@ main(ac, av)
 	 * Initialize a temporary file (buffer) and
 	 * set up terminal environment.  Read user startup commands.
 	 */
-	init();
 	if (setexit() == 0) {
 		setrupt();
 		intty = isatty(0);
 		value(PROMPT) = intty;
+		if (cp = getenv("SHELL"))
+			CP(shell, cp);
 		if (fast || !intty)
 			setterm("dumb");
 		else {
 			gettmode();
-			if ((cp = getenv("TERM")) != 0)
+			if ((cp = getenv("TERM")) != 0 && *cp)
 				setterm(cp);
 		}
 	}
-	if (setexit() == 0 && !fast && intty)
-		if (globp = getenv("EXINIT"))
+	if (setexit() == 0 && !fast && intty) {
+		if ((globp = getenv("EXINIT")) && *globp)
 			commands(1,1);
-		else if ((cp = getenv("HOME")) != 0)
-			source(strcat(strcpy(genbuf, cp), "/.exrc"), 1);
+		else {
+			globp = 0;
+			if ((cp = getenv("HOME")) != 0 && *cp)
+				source(strcat(strcpy(genbuf, cp), "/.exrc"), 1);
+		}
+		/*
+		 * Allow local .exrc too.  This loses if . is $HOME,
+		 * but nobody should notice unless they do stupid things
+		 * like putting a version command in .exrc.  Besides,
+		 * they should be using EXINIT, not .exrc, right?
+		 */
+		source(".exrc", 1);
+	}
+	init();	/* moved after prev 2 chunks to fix directory option */
 
 	/*
 	 * Initial processing.  Handle tag, recover, and file argument
@@ -317,6 +365,7 @@ main(ac, av)
 	 * If you quit out of a 'vi' command by doing Q or ^\,
 	 * you also fall through to here.
 	 */
+	seenprompt = 1;
 	ungetchar(0);
 	globp = 0;
 	initev = 0;
@@ -345,107 +394,14 @@ init()
 	for (i = 0; i <= 'z'-'a'+1; i++)
 		names[i] = 1;
 	anymarks = 0;
-}
-
-/*
- * When a hangup occurs our actions are similar to a preserve
- * command.  If the buffer has not been [Modified], then we do
- * nothing but remove the temporary files and exit.
- * Otherwise, we sync the temp file and then attempt a preserve.
- * If the preserve succeeds, we unlink our temp files.
- * If the preserve fails, we leave the temp files as they are
- * as they are a backup even without preservation if they
- * are not removed.
- */
-onhup()
-{
-
-	if (chng == 0) {
-		cleanup(1);
-		exit(0);
-	}
-	if (setexit() == 0) {
-		if (preserve()) {
-			cleanup(1);
-			exit(0);
-		}
-	}
-	exit(1);
-}
-
-/*
- * An interrupt occurred.  Drain any output which
- * is still in the output buffering pipeline.
- * Catch interrupts again.  Unless we are in visual
- * reset the output state (out of -nl mode, e.g).
- * Then like a normal error (with the \n before Interrupt
- * suppressed in visual mode).
- */
-onintr()
-{
-
-#ifndef CBREAK
-	signal(SIGINT, onintr);
-#else
-	signal(SIGINT, inopen ? vintr : onintr);
-#endif
-	draino();
-	if (!inopen) {
-		pstop();
-		setlastchar('\n');
-#ifdef CBREAK
-	}
-#else
-	} else
-		vraw();
+#ifdef CRYPT
+        if(xflag) {
+                xtflag = 1;
+                makekey(key, tperm);
+        }
 #endif
-	error("\nInterrupt" + inopen);
 }
 
-/*
- * If we are interruptible, enable interrupts again.
- * In some critical sections we turn interrupts off,
- * but not very often.
- */
-setrupt()
-{
-
-	if (ruptible)
-#ifndef CBREAK
-		signal(SIGINT, onintr);
-#else
-		signal(SIGINT, inopen ? vintr : onintr);
-#endif
-}
-
-preserve()
-{
-
-	synctmp();
-	pid = fork();
-	if (pid < 0)
-		return (0);
-	if (pid == 0) {
-		close(0);
-		dup(tfile);
-		execl(EXPRESERVE, "expreserve", (char *) 0);
-		exit(1);
-	}
-	waitfor();
-	if (rpid == pid && status == 0)
-		return (1);
-	return (0);
-}
-
-#ifndef V6
-exit(i)
-	int i;
-{
-
-	_exit(i);
-}
-#endif
-
 /*
  * Return last component of unix path name p.
  */