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[unix-history] / 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 fbb4c3a..169612f 100644 (file)
--- 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"
 #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).
  *
  *                     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.
  */
  * 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
 /*
  * 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;
  */
 main(ac, av)
        register int ac;


@@ -79,6 +81,7 @@ main(ac, av)
        bool ivis;
        bool itag = 0;
        bool fast = 0;
        bool ivis;
        bool itag = 0;
        bool fast = 0;

+       extern int onemt();

 #ifdef TRACE
        register char *tracef;
 #endif
 #ifdef TRACE
        register char *tracef;
 #endif


@@ -88,33 +91,37 @@ main(ac, av)
         * get messed up if an interrupt comes in quickly.
         */
        gTTY(1);
         * get messed up if an interrupt comes in quickly.
         */
        gTTY(1);

+#ifndef USG3TTY

        normf = tty.sg_flags;
        normf = tty.sg_flags;

+#else
+       normf = tty;
+#endif

        ppid = getpid();
        /*
        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]);
         * 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;
        }
 
                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.
         */
        /*
         * 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);
        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.
 
        /*
         * Initialize end of core pointers.


@@ -161,6 +170,10 @@ main(ac, av)
                        fast++;
                } else switch (c) {
 
                        fast++;
                } else switch (c) {
 

+               case 'R':
+                       value(READONLY) = 1;
+                       break;
+

 #ifdef TRACE
                case 'T':
                        if (av[0][2] == 0)
 #ifdef TRACE
                case 'T':
                        if (av[0][2] == 0)


@@ -174,9 +187,11 @@ main(ac, av)
                                        tracef[9] = 0;
                        }
                        trace = fopen(tracef, "w");
                                        tracef[9] = 0;
                        }
                        trace = fopen(tracef, "w");

+#define tracbuf NULL

                        if (trace == NULL)
                                printf("Trace create error\n");
                        if (trace == NULL)
                                printf("Trace create error\n");

-                       setbuf(trace, tracbuf);
+                       else
+                               setbuf(trace, tracbuf);

                        break;
 
 #endif
                        break;
 
 #endif


@@ -212,17 +227,37 @@ main(ac, av)
                                defwind = 10*defwind + *cp - '0';
                        break;
 
                                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++;
        }
                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++;
        }
 
        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
        /*
         * 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.
         */
         * 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 (setexit() == 0) {
                setrupt();
                intty = isatty(0);
                value(PROMPT) = intty;

+               if (cp = getenv("SHELL"))
+                       CP(shell, cp);

                if (fast || !intty)
                        setterm("dumb");
                else {
                        gettmode();
                if (fast || !intty)
                        setterm("dumb");
                else {
                        gettmode();

-                       if ((cp = getenv("TERM")) != 0)
+                       if ((cp = getenv("TERM")) != 0 && *cp)

                                setterm(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);
                        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
 
        /*
         * 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.
         */
         * 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;
        ungetchar(0);
        globp = 0;
        initev = 0;


@@ -345,111 +394,14 @@ init()
        for (i = 0; i <= 'z'-'a'+1; i++)
                names[i] = 1;
        anymarks = 0;
        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
 #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;
-{
-
-# ifdef TRACE
-       if (trace)
-               fclose(trace);
-# endif
-       _exit(i);
-}
-#endif
-

 /*
  * Return last component of unix path name p.
  */
 /*
  * Return last component of unix path name p.
  */