add directory study

2024-02-19 00:25:23 -05:00
parent b1306b38b1
commit f3774e2f8c
4001 changed files with 2285787 additions and 0 deletions
--- a/study/linux-travel/MINIX-1.5/1.5/Source/commands/elvis/main.c
+++ b/study/linux-travel/MINIX-1.5/1.5/Source/commands/elvis/main.c
@@ -0,0 +1,218 @@
+/* main.c */
+
+/* Author:
+ *	Steve Kirkendall
+ *	16820 SW Tallac Way
+ *	Beaverton, OR 97006
+ *	kirkenda@jove.cs.pdx.edu, or ...uunet!tektronix!psueea!jove!kirkenda
+ */
+
+
+/* This file contains the main() function of vi */
+
+#include <sys/types.h>
+#include <signal.h>
+#include <setjmp.h>
+#include "vi.h"
+
+extern		trapint(); /* defined below */
+extern char	*getenv();
+jmp_buf		jmpenv;
+
+/*---------------------------------------------------------------------*/
+
+main(argc, argv)
+	int	argc;
+	char	*argv[];
+{
+	int	i;
+	char	*cmd = (char *)0;
+	char	*tag = (char *)0;
+	char	*str;
+
+	/* set mode to MODE_VI or MODE_EX depending on program name */
+	switch (argv[0][strlen(argv[0]) - 1])
+	{
+	  case 'x':
+		mode = MODE_EX;
+		break;
+
+	  case 'w':
+		mode = MODE_VI;
+		*o_readonly = TRUE;
+		break;
+
+	  default:
+		mode = MODE_VI;
+	}
+
+	/* start curses */
+	initscr();
+	cbreak();
+	noecho();
+	scrollok(stdscr, TRUE);
+
+#ifdef DEBUG
+	/* normally, we ignore SIGQUIT.  SIGINT is trapped later */
+	signal(SIGQUIT, SIG_IGN);
+#endif
+
+	/* map the arrow keys.  The KU,KD,KL,and KR variables correspond to
+	 * the :ku=: (etc.) termcap capabilities.  The variables are defined
+	 * as part of the curses package.
+	 */
+	if (KU) mapkey(KU, "k", WHEN_VICMD, "<up>");
+	if (KD) mapkey(KD, "j", WHEN_VICMD, "<down>");
+	if (KL) mapkey(KL, "h", WHEN_VICMD, "<left>");
+	if (KR) mapkey(KR, "l", WHEN_VICMD, "<right>");
+	if (PU) mapkey(PU, "\002", WHEN_VICMD, "<PgUp>");
+	if (PD) mapkey(PD, "\006", WHEN_VICMD, "<PgDn>");
+	if (HM) mapkey(HM, "\031", WHEN_VICMD, "<Home>");
+	if (EN) mapkey(EN, "\005", WHEN_VICMD, "<End>");
+
+	/* initialize the options */
+	initopts();
+
+	/* process any flags */
+	for (i = 1; i < argc && *argv[i] == '-'; i++)
+	{
+		switch (argv[i][1])
+		{
+		  case 'R':	/* readonly */
+			*o_readonly = TRUE;
+			break;
+
+		  case 'r':	/* recover */
+			addstr("Use the `virecover` command to recover lost files\n");
+			refresh();
+			endwin();
+			exit(0);
+			break;
+
+		  case 't':	/* tag */
+			if (argv[i][2])
+			{
+				tag = argv[i] + 2;
+			}
+			else
+			{
+				i++;
+				tag = argv[i];
+			}
+			break;
+
+		  case 'v':	/* vi mode */
+			mode = MODE_VI;
+			break;
+
+		  case 'e':	/* ex mode */
+			mode = MODE_EX;
+			break;
+		}
+	}
+
+	/* if we were given an initial ex command, save it... */
+	if (i < argc && *argv[i] == '+')
+	{
+		if (argv[i][1])
+		{
+			cmd = argv[i++] + 1;
+		}
+		else
+		{
+			cmd = "$"; /* "vi + file" means start at EOF */
+			i++;
+		}
+	}
+
+	/* the remaining args are file names. */
+	nargs = argc - i;
+	if (nargs > 0)
+	{
+		strcpy(args, argv[i]);
+		while (++i < argc)
+		{
+			strcat(args, " ");
+			strcat(args, argv[i]);
+		}
+		argno = 1;
+	}
+	argno = 0;
+
+	/* search for a tag now, if desired */
+	blkinit();
+	if (tag)
+	{
+		cmd_tag(MARK_FIRST, MARK_FIRST, CMD_TAG, 0, tag);
+	}
+
+	/* if no tag, or tag failed, then start with first arg */
+	if (tmpfd < 0 && tmpstart(argv[i - nargs]) == 0 && *origname)
+	{
+		ChangeText
+		{
+		}
+		clrflag(file, MODIFIED);
+	}
+
+	/* perform the .exrc files and EXINIT environment variable */
+	str = getenv("HOME");
+	if (str)
+	{
+		sprintf(tmpblk.c, "%s%c%s", str, SLASH, HMEXRC);
+		doexrc(tmpblk.c);
+	}
+	doexrc(EXRC);
+	str = getenv("EXINIT");
+	if (str)
+	{
+		doexcmd(str);
+	}
+
+	/* now we do the immediate ex command that we noticed before */
+	if (cmd)
+	{
+		doexcmd(cmd);
+	}
+
+	/* repeatedly call ex() or vi() (depending on the mode) until the
+	 * mode is set to MODE_QUIT
+	 */
+	while (mode != MODE_QUIT)
+	{
+  		setjmp(jmpenv);
+		signal(SIGINT, trapint);
+
+		switch (mode)
+		{
+		  case MODE_VI:
+			vi();
+			break;
+
+		  case MODE_EX:
+			ex();
+			break;
+#ifdef DEBUG
+		  default:
+			msg("mode = %d?", mode);
+			mode = MODE_QUIT;
+#endif
+		}
+	}
+
+	/* free up the cut buffers */
+	cutend();
+
+	/* end curses */
+	endwin();
+
+	exit(0);
+}
+
+
+trapint(signo)
+	int	signo;
+{
+	resume_curses(FALSE);
+	longjmp(jmpenv, 1);
+}