chg_dir.c

来自「通讯程序源码」· C语言 代码 · 共 84 行

/*
 * Open a window to prompt for a new directory.  Checks to see you have
 * search permission.
 */

#include <curses.h>
#include "config.h"
#include "misc.h"

void
chg_dir()
{
	extern int fd;
	WINDOW *ch_win, *newwin();
	char *ans, *dir, *expand(), *cwd, *getcwd(), cwdbuf[200];
	char *get_str();

	cwd = getcwd(cwdbuf, 200);

	ch_win = newwin(6, 70, 5, 5);

	mvwprintw(ch_win, 2, 4, "Current directory: %s", cwd);
	mvwaddstr(ch_win, 3, 4, "New directory: ");
	box(ch_win, VERT, HORZ);

	mvwattrstr(ch_win, 0, 3, A_BOLD, " Change Directory ");
	wmove(ch_win, 3, 19);
	wrefresh(ch_win);
					/* get the answer */
	while ((ans = get_str(ch_win, 80, "", " \t\n")) != NULL) {
					/* a CR means no change */
		if (*ans == '\0')
			break;
					/* expand the input */
		dir = expand(ans);
					/* if you have search permission */
		if (!access(dir, 1)) {
			if (!chdir(dir))
				break;
		}
		beep();
		mvwattrstr(ch_win, 4, 15, A_BOLD, "No such directory or no access permission");
		wrefresh(ch_win);
		wait_key(ch_win, 3);
					/* clean up the mess */
		clear_line(ch_win, 3, 19, TRUE);
		clear_line(ch_win, 4, 14, TRUE);
		wmove(ch_win, 3, 19);
		wrefresh(ch_win);
	}
	if (fd == -1) {
		werase(ch_win);
		wrefresh(ch_win);
	}
	delwin(ch_win);
	return;
}

/*
   386BSD hack - 10/20/92 by Thad Phetteplace

   This ifdef added to keep getcwd from ever being compiled.  Otherwise
   it will redefine itself over the library version and cause an
   interesting bug in which getwd and getcwd recursively call each other
   untill the call stack overflows.  Used to be #ifdef BSD
*/
#ifdef ARMAGEDON
/*
 * Get the current working directory, AT&T style.  Well... not really, it
 * doesn't handle a NULL pointer for the buffer.
 */

/* ARGSUSED */
char *
getcwd(buf, len)
char *buf;
int len;
{
	char *getwd();

	return(getwd(buf));
}
#endif /* BSD */