catpoint/catpoint.c

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2.2 KiB
C
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/* $Id: catpoint.c,v 1.2 2013/03/28 12:00:48 lostd Exp $ */
#include <sys/types.h>
#include <sys/stat.h>
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#include <sys/mman.h>
#include <err.h>
#include <curses.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <locale.h>
#include <signal.h>
char **p; /* the slides */
int n; /* the number of slides */
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void
cleanup(int s)
{
int i;
for (i = 0; i<n; i++)
munmap(p[i], 0x1000);
endwin(); /* restore terminal */
exit(1);
}
void
setsignal()
{
signal(SIGHUP, cleanup);
signal(SIGINT, cleanup);
signal(SIGINT, cleanup);
signal(SIGQUIT, cleanup);
signal(SIGABRT, cleanup);
signal(SIGKILL, cleanup);
signal(SIGTERM, cleanup);
}
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int
main(int argc, char *argv[])
{
int c, i, fd;
struct stat statbuf;
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if (argc == 1)
errx(1, "usage: %s file ...", argv[0]);
argv++;
argc--;
setsignal();
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setlocale(LC_ALL, "");
p = calloc(argc, sizeof(char *));
n = argc;
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/* map files to mem */
for (i = 0; argv[i] != NULL; i++) {
fd = open(argv[i], O_RDONLY, 0);
if (fd == -1)
err(1, "open: %s", argv[i]);
if (fstat(fd, &statbuf) < 0)
err(1, "fstat: %s", argv[i]);
p[i] = mmap(NULL, statbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
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if (p[i] == MAP_FAILED)
err(1, "mmap");
close(fd);
}
/* init curses */
initscr();
cbreak();
noecho();
nonl();
intrflush(stdscr, FALSE);
keypad(stdscr, TRUE);
curs_set(FALSE); /* hide cursor */
/* start */
i = 0;
show:
/* display slide */
clear();
printw("%s", p[i]);
again:
c = getch();
switch (c) {
/* powerpoint remote presenter shortcuts */
case 27:
case KEY_F(5):
/* end presentation */
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case 'q':
break;
/* next */
case 'l':
case 'j':
case KEY_RIGHT:
case KEY_DOWN:
case KEY_NPAGE:
if (i < argc - 1) {
i++;
goto show;
}
goto again;
/* prev */
case 'h':
case 'k':
case KEY_LEFT:
case KEY_UP:
case KEY_PPAGE:
if (i > 0) {
i--;
goto show;
}
goto again;
/* shortcut from powerpoint. Needed for remote presenters. */
case '.':
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/* first */
case 'u':
case KEY_BEG:
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case KEY_HOME:
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i = 0;
goto show;
/* last */
case 'i':
case KEY_END:
i = argc - 1;
goto show;
default:
/* printf("key pressed = '%d'\n", c); */
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goto again;
}
/* unmap mem */
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cleanup(0);
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return (0);
}