/*
* Get the current cursor Y co-ordinate by sending the ECMA-48 CPR code to
* the terminal connected to the given file descriptor.
*/
static int pv_crs_get_ypos(int terminalfd)
{
struct termios tty;
struct termios old_tty;
char cpr[32];
int ypos;
int r;
#ifdef CURSOR_ANSWERBACK_BYTE_BY_BYTE
int got;
#endif /* CURSOR_ANSWERBACK_BYTE_BY_BYTE */
tcgetattr(terminalfd, &tty);
tcgetattr(terminalfd, &old_tty);
tty.c_lflag &= ~(ICANON | ECHO);
tcsetattr(terminalfd, TCSANOW | TCSAFLUSH, &tty);
write(terminalfd, "\033[6n", 4);
memset(cpr, 0, sizeof(cpr));
#ifdef CURSOR_ANSWERBACK_BYTE_BY_BYTE
/* Read answerback byte by byte - fails on AIX */
for (got = 0, r = 0; got < sizeof(cpr) - 2; got += r) {
r = read(terminalfd, cpr + got, 1);
if (r <= 0) {
debug("got=%d, r=%d: %s", got, r, strerror(errno));
break;
}
if (cpr[got] == 'R')
break;
}
debug
("read answerback message from fd %d, length %d - buf = %02X %02X %02X %02X %02X %02X",
terminalfd, got, cpr[0], cpr[1], cpr[2], cpr[3], cpr[4],
cpr[5]);
#else /* !CURSOR_ANSWERBACK_BYTE_BY_BYTE */
/* Read answerback in one big lump - may fail on Solaris */
r = read(terminalfd, cpr, sizeof(cpr));
if (r <= 0) {
debug("r=%d: %s", r, strerror(errno));
} else {
debug
("read answerback message from fd %d, length %d - buf = %02X %02X %02X %02X %02X %02X",
terminalfd, r, cpr[0], cpr[1], cpr[2], cpr[3], cpr[4],
cpr[5]);
}
#endif /* CURSOR_ANSWERBACK_BYTE_BY_BYTE */
ypos = pv_getnum_i(cpr + 2);
tcsetattr(terminalfd, TCSANOW | TCSAFLUSH, &old_tty);
debug("%s: %d", "ypos", ypos);
return ypos;
}
/*
* Parse the given command-line arguments into an opts_t object, handling
* "help", "license" and "version" options internally.
*
* Returns an opts_t, or 0 on error.
*
* Note that the contents of *argv[] (i.e. the command line parameters)
* aren't copied anywhere, just the pointers are copied, so make sure the
* command line data isn't overwritten or argv[1] free()d or whatever.
*/
opts_t opts_parse(int argc, char **argv)
{
#ifdef HAVE_GETOPT_LONG
struct option long_options[] = {
{"help", 0, 0, 'h'},
{"version", 0, 0, 'V'},
{"progress", 0, 0, 'p'},
{"timer", 0, 0, 't'},
{"eta", 0, 0, 'e'},
{"rate", 0, 0, 'r'},
{"average-rate", 0, 0, 'a'},
{"bytes", 0, 0, 'b'},
{"force", 0, 0, 'f'},
{"numeric", 0, 0, 'n'},
{"quiet", 0, 0, 'q'},
{"cursor", 0, 0, 'c'},
{"wait", 0, 0, 'W'},
{"size", 1, 0, 's'},
{"line-mode", 0, 0, 'l'},
{"null", 0, 0, '0'},
{"interval", 1, 0, 'i'},
{"width", 1, 0, 'w'},
{"height", 1, 0, 'H'},
{"name", 1, 0, 'N'},
{"format", 1, 0, 'F'},
{"rate-limit", 1, 0, 'L'},
{"buffer-size", 1, 0, 'B'},
{"skip-errors", 0, 0, 'E'},
{"stop-at-size", 0, 0, 'S'},
{"remote", 1, 0, 'R'},
{"pidfile", 1, 0, 'P'},
{0, 0, 0, 0}
};
int option_index = 0;
#endif
char *short_options = "hVpterabfnqcWs:l0i:w:H:N:F:L:B:ESR:P:";
int c, numopts;
opts_t opts;
opts = calloc(1, sizeof(*opts));
if (!opts) {
fprintf(stderr, /* RATS: ignore */
_("%s: option structure allocation failed (%s)"),
argv[0], strerror(errno));
fprintf(stderr, "\n");
return 0;
}
opts->program_name = argv[0];
opts->argc = 0;
opts->argv = calloc(argc + 1, sizeof(char *));
if (!opts->argv) {
fprintf(stderr, /* RATS: ignore */
_
("%s: option structure argv allocation failed (%s)"),
argv[0], strerror(errno));
fprintf(stderr, "\n");
opts_free(opts);
return 0;
}
numopts = 0;
opts->interval = 1;
do {
#ifdef HAVE_GETOPT_LONG
c = getopt_long(argc, argv, /* RATS: ignore */
short_options, long_options,
&option_index);
#else
c = getopt(argc, argv, short_options); /* RATS: ignore */
#endif
if (c < 0)
continue;
/*
* Check that any numeric arguments are of the right type.
*/
switch (c) {
case 's':
case 'w':
case 'H':
case 'L':
case 'B':
case 'R':
if (pv_getnum_check(optarg, PV_NUMTYPE_INTEGER) !=
0) {
fprintf(stderr, "%s: -%c: %s\n", argv[0],
c, _("integer argument expected"));
opts_free(opts);
return 0;
}
break;
case 'i':
if (pv_getnum_check(optarg, PV_NUMTYPE_DOUBLE) !=
0) {
fprintf(stderr, "%s: -%c: %s\n", argv[0],
c, _("numeric argument expected"));
opts_free(opts);
return 0;
}
break;
default:
break;
}
/*
* Parse each command line option.
*/
switch (c) {
case 'h':
display_help();
opts->do_nothing = 1;
return opts;
break;
case 'V':
display_version();
opts->do_nothing = 1;
return opts;
break;
case 'p':
opts->progress = 1;
numopts++;
break;
case 't':
opts->timer = 1;
numopts++;
break;
case 'e':
opts->eta = 1;
numopts++;
break;
case 'r':
opts->rate = 1;
numopts++;
break;
case 'a':
opts->average_rate = 1;
numopts++;
break;
case 'b':
opts->bytes = 1;
numopts++;
break;
case 'f':
opts->force = 1;
break;
case 'n':
opts->numeric = 1;
numopts++;
break;
case 'q':
opts->no_op = 1;
numopts++;
break;
case 'c':
opts->cursor = 1;
break;
case 'W':
opts->wait = 1;
break;
case 's':
opts->size = pv_getnum_ll(optarg);
break;
case 'l':
opts->linemode = 1;
break;
case '0':
opts->null = 1;
opts->linemode = 1;
break;
case 'i':
opts->interval = pv_getnum_d(optarg);
break;
case 'w':
opts->width = pv_getnum_i(optarg);
break;
case 'H':
opts->height = pv_getnum_i(optarg);
break;
case 'N':
opts->name = optarg;
break;
case 'L':
opts->rate_limit = pv_getnum_ll(optarg);
break;
case 'B':
opts->buffer_size = pv_getnum_ll(optarg);
break;
case 'E':
opts->skip_errors++;
break;
case 'S':
opts->stop_at_size = 1;
break;
case 'R':
opts->remote = pv_getnum_i(optarg);
break;
case 'P':
opts->pidfile = optarg;
break;
case 'F':
opts->format = optarg;
break;
default:
#ifdef HAVE_GETOPT_LONG
fprintf(stderr, /* RATS: ignore (OK) */
_("Try `%s --help' for more information."),
argv[0]);
#else
fprintf(stderr, /* RATS: ignore (OK) */
_("Try `%s -h' for more information."),
argv[0]);
#endif
fprintf(stderr, "\n");
opts_free(opts);
return 0;
break;
}
} while (c != -1);
/*
* Default options: -pterb
*/
if (0 == numopts) {
opts->progress = 1;
opts->timer = 1;
opts->eta = 1;
opts->rate = 1;
opts->bytes = 1;
}
/*
* Store remaining command-line arguments.
*/
while (optind < argc) {
opts->argv[opts->argc++] = argv[optind++];
}
return opts;
}