int
do_shell(char *filename)
{
char cmdbuf[200];
kill_line();
putchar('!');
fflush(stdout);
promptlen = 1;
if (lastp)
fputs(shell_line, stdout);
else {
if (ttyin(cmdbuf, sizeof(cmdbuf) - 2, '!') < 0)
return (-1);
if (expand(shell_line, sizeof(shell_line), cmdbuf)) {
kill_line();
promptlen = printf("!%s", shell_line);
}
}
fflush(stdout);
write(STDERR_FILENO, "\n", 1);
promptlen = 0;
shellp = 1;
execute(filename, shell, shell, "-c", shell_line);
}
void print(FILE *fp, int pagesize) {
static int lines = 0;
char buf[BUFSIZ];
while (fgets(buf, sizeof buf, fp) != NULL)
if (++lines < pagesize) {
fputs(buf, stdout);
}
else {
buf[strlen(buf)-1] = '\0';
fputs(buf, stdout);
// not sure how this works fflush(buf);
ttyin();
lines = 0;
}
}
/*
* Read a command and do it. A command consists of an optional integer
* argument followed by the command character. Return the number of lines
* to display in the next screenful. If there is nothing more to display
* in the current file, zero is returned.
*/
int
command(char *filename, FILE *f)
{
int nlines;
int retval;
int ch;
char colonch;
int done;
char comchar, cmdbuf[80];
#define ret(val) retval=val;done++;break
retval = done = 0;
if (!errors)
prompt(filename);
else
errors = 0;
for (;;) {
nlines = number(&comchar);
lastp = colonch = 0;
if (comchar == '.') { /* Repeat last command */
lastp++;
comchar = lastcmd;
nlines = lastarg;
if (lastcmd == ':')
colonch = lastcolon;
}
lastcmd = comchar;
lastarg = nlines;
if (comchar == otty.c_cc[VERASE]) {
kill_line();
prompt(filename);
continue;
}
switch (comchar) {
case ':':
retval = colon(filename, colonch, nlines);
if (retval >= 0)
done++;
break;
case 'b':
case ctrl('B'):
{
int initline;
if (no_intty) {
write(STDERR_FILENO, &bell, 1);
return (-1);
}
if (nlines == 0)
nlines++;
putchar('\r');
erasep(0);
putchar('\n');
if (clreol)
cleareol();
printf("...back %d page", nlines);
if (nlines > 1)
fputs("s\n", stdout);
else
putchar('\n');
if (clreol)
cleareol();
putchar('\n');
initline = Currline - (off_t)dlines * (nlines + 1);
if (!noscroll)
--initline;
if (initline < 0)
initline = 0;
Fseek(f, (off_t)0);
Currline = 0; /* skiplns() will make Currline correct */
skiplns(initline, f);
ret(dlines);
}
case ' ':
case 'z':
if (nlines == 0)
nlines = dlines;
else if (comchar == 'z')
dlines = nlines;
ret(nlines);
case 'd':
case ctrl('D'):
if (nlines != 0)
nscroll = nlines;
ret(nscroll);
case 'q':
case 'Q':
end_it();
case 's':
case 'f':
if (nlines == 0)
nlines++;
if (comchar == 'f')
nlines *= dlines;
putchar('\r');
erasep(0);
putchar('\n');
if (clreol)
cleareol();
printf("...skipping %d line", nlines);
if (nlines > 1)
fputs("s\n", stdout);
else
putchar('\n');
if (clreol)
cleareol();
putchar('\n');
while (nlines > 0) {
while ((ch = Getc(f)) != '\n') {
if (ch == EOF) {
retval = 0;
done++;
goto endsw;
}
}
Currline++;
nlines--;
}
ret(dlines);
case '\n':
if (nlines != 0)
dlines = nlines;
else
nlines = 1;
ret(nlines);
case '\f':
if (!no_intty) {
doclear();
Fseek(f, screen_start.chrctr);
Currline = screen_start.line;
ret(dlines);
} else {
write(STDERR_FILENO, &bell, 1);
break;
}
case '\'':
if (!no_intty) {
kill_line();
fputs("\n***Back***\n\n", stdout);
Fseek(f, context.chrctr);
Currline = context.line;
ret(dlines);
} else {
write(STDERR_FILENO, &bell, 1);
break;
}
case '=':
kill_line();
promptlen = printf("%lld", (long long)Currline);
fflush(stdout);
break;
case 'n':
lastp++;
case '/':
if (nlines == 0)
nlines++;
kill_line();
putchar('/');
promptlen = 1;
fflush(stdout);
if (lastp) {
/* Use previous r.e. */
write(STDERR_FILENO, "\r", 1);
if (search(NULL, f, nlines) < 0)
break;
} else {
if (ttyin(cmdbuf, sizeof(cmdbuf) - 2, '/') < 0) {
kill_line();
prompt(filename);
continue;
}
write(STDERR_FILENO, "\r", 1);
if (search(cmdbuf, f, nlines) < 0)
break;
}
ret(dlines-1);
case '?':
case 'h':
if (noscroll)
doclear();
fputs(more_help, stdout);
prompt(filename);
break;
default:
if (dum_opt) {
kill_line();
if (Senter && Sexit) {
tputs(Senter, 1, putch);
fputs(DUM_ERROR, stdout);
promptlen = sizeof(DUM_ERROR) - 1 +
(2 * soglitch);
tputs(Sexit, 1, putch);
} else {
fputs(DUM_ERROR, stdout);
promptlen = sizeof(DUM_ERROR) - 1;
}
fflush(stdout);
} else
write(STDERR_FILENO, &bell, 1);
break;
}
if (done)
break;
}
putchar('\r');
endsw:
inwait = 0;
notell++;
return (retval);
}
