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setterm.c
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setterm.c
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/* setterm.c, set terminal attributes.
*
* Copyright (C) 1990 Gordon Irlam (gordoni@cs.ua.oz.au). Conditions of use,
* modification, and redistribution are contained in the file COPYRIGHT that
* forms part of this distribution.
*
* Adaption to Linux by Peter MacDonald.
*
* Enhancements by Mika Liljeberg (liljeber@cs.Helsinki.FI)
*
* Beep modifications by Christophe Jolif (cjolif@storm.gatelink.fr.net)
*
* Sanity increases by Cafeine Addict [sic].
*
* Powersave features by todd j. derr <tjd@wordsmith.org>
*
* Converted to terminfo by Kars de Jong (jongk@cs.utwente.nl)
*
* 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
* - added Native Language Support
*
* Semantics:
*
* Setterm writes to standard output a character string that will
* invoke the specified terminal capabilities. Where possible
* terminfo is consulted to find the string to use. Some options
* however do not correspond to a terminfo capability. In this case if
* the terminal type is "con*", or "linux*" the string that invokes
* the specified capabilities on the PC Linux virtual console driver
* is output. Options that are not implemented by the terminal are
* ignored.
*
* The following options are non-obvious.
*
* -term can be used to override the TERM environment variable.
*
* -reset displays the terminal reset string, which typically resets the
* terminal to its power on state.
*
* -initialize displays the terminal initialization string, which typically
* sets the terminal's rendering options, and other attributes to the
* default values.
*
* -default sets the terminal's rendering options to the default values.
*
* -store stores the terminal's current rendering options as the default
* values. */
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/klog.h>
#include <sys/param.h> /* for MAXPATHLEN */
#include <sys/time.h>
#include <termios.h>
#include <unistd.h>
#if defined(HAVE_NCURSESW_TERM_H)
# include <ncursesw/term.h>
#elif defined(HAVE_NCURSES_TERM_H)
# include <ncurses/term.h>
#elif defined(HAVE_TERM_H)
# include <term.h>
#endif
#ifdef HAVE_LINUX_TIOCL_H
# include <linux/tiocl.h>
#endif
#include "all-io.h"
#include "c.h"
#include "closestream.h"
#include "nls.h"
#include "optutils.h"
#include "strutils.h"
#include "xalloc.h"
/* Constants. */
/* Non-standard return values. */
#define EXIT_DUMPFILE -1
/* Colors. */
enum {
BLACK = 0,
RED,
GREEN,
YELLOW,
BLUE,
MAGENTA,
CYAN,
WHITE,
GREY,
DEFAULT
};
static const char *colornames[] = {
[BLACK] = "black",
[RED] = "red",
[GREEN] = "green",
[YELLOW]= "yellow",
[BLUE] = "blue",
[MAGENTA]="magenta",
[CYAN] = "cyan",
[WHITE] = "white",
[GREY] = "grey",
[DEFAULT] = "default"
};
#define is_valid_color(x) (x >= 0 && (size_t) x < ARRAY_SIZE(colornames))
/* Blank commands */
enum {
BLANKSCREEN = -1,
UNBLANKSCREEN = -2,
BLANKEDSCREEN = -3
};
/* <linux/tiocl.h> fallback */
#ifndef TIOCL_BLANKSCREEN
enum {
TIOCL_UNBLANKSCREEN = 4, /* unblank screen */
TIOCL_SETVESABLANK = 10, /* set vesa blanking mode */
TIOCL_BLANKSCREEN = 14, /* keep screen blank even if a key is pressed */
TIOCL_BLANKEDSCREEN = 15 /* return which vt was blanked */
};
#endif
/* Powersave modes */
enum {
VESA_BLANK_MODE_OFF = 0,
VESA_BLANK_MODE_SUSPENDV,
VESA_BLANK_MODE_SUSPENDH,
VESA_BLANK_MODE_POWERDOWN
};
/* klogctl() actions */
enum {
SYSLOG_ACTION_CONSOLE_OFF = 6,
SYSLOG_ACTION_CONSOLE_ON = 7,
SYSLOG_ACTION_CONSOLE_LEVEL = 8
};
/* Console log levels */
enum {
CONSOLE_LEVEL_MIN = 0,
CONSOLE_LEVEL_MAX = 8
};
/* Various numbers */
#define DEFAULT_TAB_LEN 8
#define BLANK_MAX 60
#define TABS_MAX 160
#define BLENGTH_MAX 2000
/* Command controls. */
struct setterm_control {
char *opt_te_terminal_name; /* terminal name */
int opt_bl_min; /* blank screen */
int opt_blength_l; /* bell duration in milliseconds */
int opt_bfreq_f; /* bell frequency in Hz */
int opt_sn_num; /* console number to be snapshot */
char *opt_sn_name; /* path to write snap */
char *in_device; /* device to snapshot */
int opt_msglevel_num; /* printk() logging level */
int opt_ps_mode; /* powersave mode */
int opt_pd_min; /* powerdown time */
int opt_rt_len; /* regular tab length */
int opt_tb_array[TABS_MAX + 1]; /* array for tab list */
/* colors */
unsigned int opt_fo_color:4, opt_ba_color:4, opt_ul_color:4, opt_hb_color:4;
/* boolean options */
unsigned int opt_cu_on:1, opt_li_on:1, opt_bo_on:1, opt_hb_on:1,
opt_bl_on:1, opt_re_on:1, opt_un_on:1, opt_rep_on:1,
opt_appck_on:1, opt_invsc_on:1, opt_msg_on:1, opt_cl_all:1,
vcterm:1;
/* Option flags. Set when an option is invoked. */
uint64_t opt_term:1, opt_reset:1, opt_resize:1, opt_initialize:1, opt_cursor:1,
opt_linewrap:1, opt_default:1, opt_foreground:1,
opt_background:1, opt_bold:1, opt_blink:1, opt_reverse:1,
opt_underline:1, opt_store:1, opt_clear:1, opt_blank:1,
opt_snap:1, opt_snapfile:1, opt_append:1, opt_ulcolor:1,
opt_hbcolor:1, opt_halfbright:1, opt_repeat:1, opt_tabs:1,
opt_clrtabs:1, opt_regtabs:1, opt_appcursorkeys:1,
opt_inversescreen:1, opt_msg:1, opt_msglevel:1, opt_powersave:1,
opt_powerdown:1, opt_blength:1, opt_bfreq:1;
};
static int parse_color(const char *arg)
{
size_t i;
for (i = 0; i < ARRAY_SIZE(colornames); i++) {
if (strcmp(colornames[i], arg) == 0)
return i;
}
return -EINVAL;
}
static int parse_febg_color(const char *arg)
{
int color = parse_color(arg);
if (color < 0)
color = strtos32_or_err(arg, _("argument error"));
if (!is_valid_color(color) || color == GREY)
errx(EXIT_FAILURE, "%s: %s", _("argument error"), arg);
return color;
}
static int parse_ulhb_color(char **av, int *oi)
{
char *color_name;
int bright = 0;
int color = -1;
if (av[*oi] && strcmp(av[*oi - 1], "bright") == 0) {
bright = 1;
color_name = av[*oi];
(*oi)++;
} else
color_name = av[*oi - 1];
color = parse_color(color_name);
if (color < 0)
color = strtos32_or_err(color_name, _("argument error"));
if (!is_valid_color(color) || color == DEFAULT)
errx(EXIT_FAILURE, "%s: %s", _("argument error"), color_name);
if (bright && (color == BLACK || color == GREY))
errx(EXIT_FAILURE, _("argument error: bright %s is not supported"), color_name);
if (bright)
color |= 8;
return color;
}
static char *find_optional_arg(char **av, char *oa, int *oi)
{
char *arg;
if (oa)
return oa;
arg = av[*oi];
if (!arg || arg[0] == '-')
return NULL;
(*oi)++;
return arg;
}
static int parse_blank(char **av, char *oa, int *oi)
{
char *arg;
arg = find_optional_arg(av, oa, oi);
if (!arg)
return BLANKEDSCREEN;
if (!strcmp(arg, "force"))
return BLANKSCREEN;
if (!strcmp(arg, "poke"))
return UNBLANKSCREEN;
int ret;
ret = strtos32_or_err(arg, _("argument error"));
if (ret < 0 || BLANK_MAX < ret)
errx(EXIT_FAILURE, "%s: %s", _("argument error"), arg);
return ret;
}
static int parse_powersave(const char *arg)
{
if (strcmp(arg, "on") == 0)
return VESA_BLANK_MODE_SUSPENDV;
if (strcmp(arg, "vsync") == 0)
return VESA_BLANK_MODE_SUSPENDV;
if (strcmp(arg, "hsync") == 0)
return VESA_BLANK_MODE_SUSPENDH;
if (strcmp(arg, "powerdown") == 0)
return VESA_BLANK_MODE_POWERDOWN;
if (strcmp(arg, "off") == 0)
return VESA_BLANK_MODE_OFF;
errx(EXIT_FAILURE, "%s: %s", _("argument error"), arg);
}
static int parse_msglevel(const char *arg)
{
int ret;
ret = strtos32_or_err(arg, _("argument error"));
if (ret < CONSOLE_LEVEL_MIN || CONSOLE_LEVEL_MAX < ret)
errx(EXIT_FAILURE, "%s: %s", _("argument error"), arg);
return ret;
}
static int parse_snap(char **av, char *oa, int *oi)
{
int ret;
char *arg;
arg = find_optional_arg(av, oa, oi);
if (!arg)
return 0;
ret = strtos32_or_err(arg, _("argument error"));
if (ret < 1)
errx(EXIT_FAILURE, "%s: %s", _("argument error"), arg);
return ret;
}
static void parse_tabs(char **av, char *oa, int *oi, int *tab_array)
{
int i = 0;
if (oa) {
tab_array[i] = strtos32_or_err(oa, _("argument error"));
i++;
}
while (av[*oi]) {
if (TABS_MAX < i)
errx(EXIT_FAILURE, _("too many tabs"));
if (av[*oi][0] == '-')
break;
tab_array[i] = strtos32_or_err(av[*oi], _("argument error"));
(*oi)++;
i++;
}
tab_array[i] = -1;
}
static int parse_regtabs(char **av, char *oa, int *oi)
{
int ret;
char *arg;
arg = find_optional_arg(av, oa, oi);
if (!arg)
return DEFAULT_TAB_LEN;
ret = strtos32_or_err(arg, _("argument error"));
if (ret < 1 || TABS_MAX < ret)
errx(EXIT_FAILURE, "%s: %s", _("argument error"), arg);
return ret;
}
static int parse_blength(char **av, char *oa, int *oi)
{
int ret = -1;
char *arg;
arg = find_optional_arg(av, oa, oi);
if (!arg)
return 0;
ret = strtos32_or_err(arg, _("argument error"));
if (ret < 0 || BLENGTH_MAX < ret)
errx(EXIT_FAILURE, "%s: %s", _("argument error"), arg);
return ret;
}
static int parse_bfreq(char **av, char *oa, int *oi)
{
char *arg;
arg = find_optional_arg(av, oa, oi);
if (!arg)
return 0;
return strtos32_or_err(arg, _("argument error"));
}
static void __attribute__((__noreturn__)) usage(void)
{
FILE *out = stdout;
fputs(USAGE_HEADER, out);
fprintf(out,
_(" %s [options]\n"), program_invocation_short_name);
fputs(USAGE_SEPARATOR, out);
fputs(_("Set the attributes of a terminal.\n"), out);
fputs(USAGE_OPTIONS, out);
fputs(_(" --term <terminal_name> override TERM environment variable\n"), out);
fputs(_(" --reset reset terminal to power-on state\n"), out);
fputs(_(" --resize reset terminal rows and columns\n"), out);
fputs(_(" --initialize display init string, and use default settings\n"), out);
fputs(_(" --default use default terminal settings\n"), out);
fputs(_(" --store save current terminal settings as default\n"), out);
fputs(USAGE_SEPARATOR, out);
fputs(_(" --cursor on|off display cursor\n"), out);
fputs(_(" --repeat on|off keyboard repeat\n"), out);
fputs(_(" --appcursorkeys on|off cursor key application mode\n"), out);
fputs(_(" --linewrap on|off continue on a new line when a line is full\n"), out);
fputs(_(" --inversescreen on|off swap colors for the whole screen\n"), out);
fputs(USAGE_SEPARATOR, out);
fputs(_(" --msg on|off send kernel messages to console\n"), out);
fputs(_(" --msglevel <0-8> kernel console log level\n"), out);
fputs(USAGE_SEPARATOR, out);
fputs(_(" --foreground default|<color> set foreground color\n"), out);
fputs(_(" --background default|<color> set background color\n"), out);
fputs(_(" --ulcolor [bright] <color> set underlined text color\n"), out);
fputs(_(" --hbcolor [bright] <color> set half-bright text color\n"), out);
fputs(_(" <color>: black blue cyan green grey magenta red white yellow\n"), out);
fputs(USAGE_SEPARATOR, out);
fputs(_(" --bold on|off bold\n"), out);
fputs(_(" --half-bright on|off dim\n"), out);
fputs(_(" --blink on|off blink\n"), out);
fputs(_(" --underline on|off underline\n"), out);
fputs(_(" --reverse on|off swap foreground and background colors\n"), out);
fputs(USAGE_SEPARATOR, out);
fputs(_(" --clear[=<all|rest>] clear screen and set cursor position\n"), out);
fputs(_(" --tabs[=<number>...] set these tab stop positions, or show them\n"), out);
fputs(_(" --clrtabs[=<number>...] clear these tab stop positions, or all\n"), out);
fputs(_(" --regtabs[=1-160] set a regular tab stop interval\n"), out);
fputs(_(" --blank[=0-60|force|poke] set time of inactivity before screen blanks\n"), out);
fputs(USAGE_SEPARATOR, out);
fputs(_(" --dump[=<number>] write vcsa<number> console dump to file\n"), out);
fputs(_(" --append <number> append vcsa<number> console dump to file\n"), out);
fputs(_(" --file <filename> name of the dump file\n"), out);
fputs(USAGE_SEPARATOR, out);
fputs(_(" --powersave on|vsync|hsync|powerdown|off\n"), out);
fputs(_(" set vesa powersaving features\n"), out);
fputs(_(" --powerdown[=<0-60>] set vesa powerdown interval in minutes\n"), out);
fputs(USAGE_SEPARATOR, out);
fputs(_(" --blength[=<0-2000>] duration of the bell in milliseconds\n"), out);
fputs(_(" --bfreq[=<number>] bell frequency in Hertz\n"), out);
fputs(USAGE_SEPARATOR, out);
printf( " --help %s\n", USAGE_OPTSTR_HELP);
printf( " --version %s\n", USAGE_OPTSTR_VERSION);
printf(USAGE_MAN_TAIL("setterm(1)"));
exit(EXIT_SUCCESS);
}
static int __attribute__((__pure__)) set_opt_flag(int opt)
{
if (opt)
errx(EXIT_FAILURE, _("duplicate use of an option"));
return 1;
}
static void parse_option(struct setterm_control *ctl, int ac, char **av)
{
int c;
enum {
OPT_TERM = CHAR_MAX + 1,
OPT_RESET,
OPT_RESIZE,
OPT_INITIALIZE,
OPT_CURSOR,
OPT_REPEAT,
OPT_APPCURSORKEYS,
OPT_LINEWRAP,
OPT_DEFAULT,
OPT_FOREGROUND,
OPT_BACKGROUND,
OPT_ULCOLOR,
OPT_HBCOLOR,
OPT_INVERSESCREEN,
OPT_BOLD,
OPT_HALF_BRIGHT,
OPT_BLINK,
OPT_REVERSE,
OPT_UNDERLINE,
OPT_STORE,
OPT_CLEAR,
OPT_TABS,
OPT_CLRTABS,
OPT_REGTABS,
OPT_BLANK,
OPT_DUMP,
OPT_APPEND,
OPT_FILE,
OPT_MSG,
OPT_MSGLEVEL,
OPT_POWERSAVE,
OPT_POWERDOWN,
OPT_BLENGTH,
OPT_BFREQ,
OPT_VERSION,
OPT_HELP
};
static const struct option longopts[] = {
{"term", required_argument, NULL, OPT_TERM},
{"reset", no_argument, NULL, OPT_RESET},
{"resize", no_argument, NULL, OPT_RESIZE},
{"initialize", no_argument, NULL, OPT_INITIALIZE},
{"cursor", required_argument, NULL, OPT_CURSOR},
{"repeat", required_argument, NULL, OPT_REPEAT},
{"appcursorkeys", required_argument, NULL, OPT_APPCURSORKEYS},
{"linewrap", required_argument, NULL, OPT_LINEWRAP},
{"default", no_argument, NULL, OPT_DEFAULT},
{"foreground", required_argument, NULL, OPT_FOREGROUND},
{"background", required_argument, NULL, OPT_BACKGROUND},
{"ulcolor", required_argument, NULL, OPT_ULCOLOR},
{"hbcolor", required_argument, NULL, OPT_HBCOLOR},
{"inversescreen", required_argument, NULL, OPT_INVERSESCREEN},
{"bold", required_argument, NULL, OPT_BOLD},
{"half-bright", required_argument, NULL, OPT_HALF_BRIGHT},
{"blink", required_argument, NULL, OPT_BLINK},
{"reverse", required_argument, NULL, OPT_REVERSE},
{"underline", required_argument, NULL, OPT_UNDERLINE},
{"store", no_argument, NULL, OPT_STORE},
{"clear", optional_argument, NULL, OPT_CLEAR},
{"tabs", optional_argument, NULL, OPT_TABS},
{"clrtabs", optional_argument, NULL, OPT_CLRTABS},
{"regtabs", optional_argument, NULL, OPT_REGTABS},
{"blank", optional_argument, NULL, OPT_BLANK},
{"dump", optional_argument, NULL, OPT_DUMP},
{"append", required_argument, NULL, OPT_APPEND},
{"file", required_argument, NULL, OPT_FILE},
{"msg", required_argument, NULL, OPT_MSG},
{"msglevel", required_argument, NULL, OPT_MSGLEVEL},
{"powersave", required_argument, NULL, OPT_POWERSAVE},
{"powerdown", optional_argument, NULL, OPT_POWERDOWN},
{"blength", optional_argument, NULL, OPT_BLENGTH},
{"bfreq", optional_argument, NULL, OPT_BFREQ},
{"version", no_argument, NULL, OPT_VERSION},
{"help", no_argument, NULL, OPT_HELP},
{NULL, 0, NULL, 0}
};
static const ul_excl_t excl[] = {
{ OPT_DEFAULT, OPT_STORE },
{ OPT_TABS, OPT_CLRTABS, OPT_REGTABS },
{ OPT_MSG, OPT_MSGLEVEL },
{ 0 }
};
int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
while ((c = getopt_long_only(ac, av, "", longopts, NULL)) != -1) {
err_exclusive_options(c, longopts, excl, excl_st);
switch (c) {
case OPT_TERM:
ctl->opt_term = set_opt_flag(ctl->opt_term);
ctl->opt_te_terminal_name = optarg;
break;
case OPT_RESET:
ctl->opt_reset = set_opt_flag(ctl->opt_reset);
break;
case OPT_RESIZE:
ctl->opt_resize = set_opt_flag(ctl->opt_resize);
break;
case OPT_INITIALIZE:
ctl->opt_initialize = set_opt_flag(ctl->opt_initialize);
break;
case OPT_CURSOR:
ctl->opt_cursor = set_opt_flag(ctl->opt_cursor);
ctl->opt_cu_on = parse_switch(optarg, _("argument error"),
"on", "off", NULL);
break;
case OPT_REPEAT:
ctl->opt_repeat = set_opt_flag(ctl->opt_repeat);
ctl->opt_rep_on = parse_switch(optarg, _("argument error"),
"on", "off", NULL);
break;
case OPT_APPCURSORKEYS:
ctl->opt_appcursorkeys = set_opt_flag(ctl->opt_appcursorkeys);
ctl->opt_appck_on = parse_switch(optarg, _("argument error"),
"on", "off", NULL);
break;
case OPT_LINEWRAP:
ctl->opt_linewrap = set_opt_flag(ctl->opt_linewrap);
ctl->opt_li_on = parse_switch(optarg, _("argument error"),
"on", "off", NULL);
break;
case OPT_DEFAULT:
ctl->opt_default = set_opt_flag(ctl->opt_default);
break;
case OPT_FOREGROUND:
ctl->opt_foreground = set_opt_flag(ctl->opt_foreground);
ctl->opt_fo_color = parse_febg_color(optarg);
break;
case OPT_BACKGROUND:
ctl->opt_background = set_opt_flag(ctl->opt_background);
ctl->opt_ba_color = parse_febg_color(optarg);
break;
case OPT_ULCOLOR:
ctl->opt_ulcolor = set_opt_flag(ctl->opt_ulcolor);
ctl->opt_ul_color = parse_ulhb_color(av, &optind);
break;
case OPT_HBCOLOR:
ctl->opt_hbcolor = set_opt_flag(ctl->opt_hbcolor);
ctl->opt_hb_color = parse_ulhb_color(av, &optind);
break;
case OPT_INVERSESCREEN:
ctl->opt_inversescreen = set_opt_flag(ctl->opt_inversescreen);
ctl->opt_invsc_on = parse_switch(optarg, _("argument error"),
"on", "off", NULL);
break;
case OPT_BOLD:
ctl->opt_bold = set_opt_flag(ctl->opt_bold);
ctl->opt_bo_on = parse_switch(optarg, _("argument error"),
"on", "off", NULL);
break;
case OPT_HALF_BRIGHT:
ctl->opt_halfbright = set_opt_flag(ctl->opt_halfbright);
ctl->opt_hb_on = parse_switch(optarg, _("argument error"),
"on", "off", NULL);
break;
case OPT_BLINK:
ctl->opt_blink = set_opt_flag(ctl->opt_blink);
ctl->opt_bl_on = parse_switch(optarg, _("argument error"),
"on", "off", NULL);
break;
case OPT_REVERSE:
ctl->opt_reverse = set_opt_flag(ctl->opt_reverse);
ctl->opt_re_on = parse_switch(optarg, _("argument error"),
"on", "off", NULL);
break;
case OPT_UNDERLINE:
ctl->opt_underline = set_opt_flag(ctl->opt_underline);
ctl->opt_un_on = parse_switch(optarg, _("argument error"),
"on", "off", NULL);
break;
case OPT_STORE:
ctl->opt_store = set_opt_flag(ctl->opt_store);
break;
case OPT_CLEAR:
ctl->opt_clear = set_opt_flag(ctl->opt_clear);
if (optarg)
ctl->opt_cl_all = parse_switch(optarg, _("argument error"),
"all", "rest", NULL);
else
ctl->opt_cl_all = 1;
break;
case OPT_TABS:
ctl->opt_tabs = set_opt_flag(ctl->opt_tabs);
parse_tabs(av, optarg, &optind, ctl->opt_tb_array);
break;
case OPT_CLRTABS:
ctl->opt_clrtabs = set_opt_flag(ctl->opt_clrtabs);
parse_tabs(av, optarg, &optind, ctl->opt_tb_array);
break;
case OPT_REGTABS:
ctl->opt_regtabs = set_opt_flag(ctl->opt_regtabs);
ctl->opt_rt_len = parse_regtabs(av, optarg, &optind);
break;
case OPT_BLANK:
ctl->opt_blank = set_opt_flag(ctl->opt_blank);
ctl->opt_bl_min = parse_blank(av, optarg, &optind);
break;
case OPT_DUMP:
ctl->opt_snap = set_opt_flag(ctl->opt_snap);
ctl->opt_sn_num = parse_snap(av, optarg, &optind);
break;
case OPT_APPEND:
ctl->opt_append = set_opt_flag(ctl->opt_append);
ctl->opt_sn_num = parse_snap(av, optarg, &optind);
break;
case OPT_FILE:
ctl->opt_snapfile = set_opt_flag(ctl->opt_snapfile);
ctl->opt_sn_name = optarg;
break;
case OPT_MSG:
ctl->opt_msg = set_opt_flag(ctl->opt_msg);
ctl->opt_msg_on = parse_switch(optarg, _("argument error"),
"on", "off", NULL);
break;
case OPT_MSGLEVEL:
ctl->opt_msglevel = set_opt_flag(ctl->opt_msglevel);
ctl->opt_msglevel_num = parse_msglevel(optarg);
if (ctl->opt_msglevel_num == 0) {
ctl->opt_msg = set_opt_flag(ctl->opt_msg);
ctl->opt_msg_on |= 1;
}
break;
case OPT_POWERSAVE:
ctl->opt_powersave = set_opt_flag(ctl->opt_powersave);
ctl->opt_ps_mode = parse_powersave(optarg);
break;
case OPT_POWERDOWN:
ctl->opt_powerdown = set_opt_flag(ctl->opt_powerdown);
ctl->opt_pd_min = parse_blank(av, optarg, &optind);
break;
case OPT_BLENGTH:
ctl->opt_blength = set_opt_flag(ctl->opt_blength);
ctl->opt_blength_l = parse_blength(av, optarg, &optind);
break;
case OPT_BFREQ:
ctl->opt_bfreq = set_opt_flag(ctl->opt_bfreq);
ctl->opt_bfreq_f = parse_bfreq(av, optarg, &optind);
break;
case OPT_VERSION:
print_version(EXIT_SUCCESS);
case OPT_HELP:
usage();
default:
errtryhelp(EXIT_FAILURE);
}
}
}
/* Return the specified terminfo string, or an empty string if no such
* terminfo capability exists. */
static char *ti_entry(const char *name)
{
char *buf_ptr;
if ((buf_ptr = tigetstr(name)) == (char *)-1)
buf_ptr = NULL;
return buf_ptr;
}
static void show_tabs(void)
{
int i, co = tigetnum("cols");
if (co > 0) {
printf("\r ");
for (i = 10; i < co - 2; i += 10)
printf("%-10d", i);
putchar('\n');
for (i = 1; i <= co; i++)
putchar(i % 10 + '0');
putchar('\n');
for (i = 1; i < co; i++)
printf("\tT\b");
putchar('\n');
}
}
static int open_snapshot_device(struct setterm_control *ctl)
{
int fd;
if (ctl->opt_sn_num)
xasprintf(&ctl->in_device, "/dev/vcsa%d", ctl->opt_sn_num);
else
xasprintf(&ctl->in_device, "/dev/vcsa");
fd = open(ctl->in_device, O_RDONLY);
if (fd < 0)
err(EXIT_DUMPFILE, _("cannot read %s"), ctl->in_device);
return fd;
}
static void set_blanking(struct setterm_control *ctl)
{
char ioctlarg;
int ret;
if (0 <= ctl->opt_bl_min) {
printf("\033[9;%d]", ctl->opt_bl_min);
return;
}
switch (ctl->opt_bl_min) {
case BLANKSCREEN:
ioctlarg = TIOCL_BLANKSCREEN;
if (ioctl(STDIN_FILENO, TIOCLINUX, &ioctlarg))
warn(_("cannot force blank"));
break;
case UNBLANKSCREEN:
ioctlarg = TIOCL_UNBLANKSCREEN;
if (ioctl(STDIN_FILENO, TIOCLINUX, &ioctlarg))
warn(_("cannot force unblank"));
break;
case BLANKEDSCREEN:
ioctlarg = TIOCL_BLANKEDSCREEN;
ret = ioctl(STDIN_FILENO, TIOCLINUX, &ioctlarg);
if (ret < 0)
warn(_("cannot get blank status"));
else
printf("%d\n", ret);
break;
default: /* should be impossible to reach */
abort();
}
}
static void screendump(struct setterm_control *ctl)
{
unsigned char header[4];
unsigned int rows, cols;
int fd;
FILE *out;
size_t i, j;
ssize_t rc;
char *inbuf, *outbuf, *p, *q;
/* open source and destination files */
fd = open_snapshot_device(ctl);
if (!ctl->opt_sn_name)
ctl->opt_sn_name = "screen.dump";
out = fopen(ctl->opt_sn_name, ctl->opt_snap ? "w" : "a");
if (!out)
err(EXIT_DUMPFILE, _("cannot open dump file %s for output"), ctl->opt_sn_name);
/* determine snapshot size */
if (read(fd, header, 4) != 4)
err(EXIT_DUMPFILE, _("cannot read %s"), ctl->in_device);
rows = header[0];
cols = header[1];
if (rows * cols == 0)
err(EXIT_DUMPFILE, _("cannot read %s"), ctl->in_device);
/* allocate buffers */
inbuf = xmalloc(rows * cols * 2);
outbuf = xmalloc(rows * (cols + 1));
/* read input */
rc = read(fd, inbuf, rows * cols * 2);
if (rc < 0 || (size_t)rc != rows * cols * 2)
err(EXIT_DUMPFILE, _("cannot read %s"), ctl->in_device);
p = inbuf;
q = outbuf;
/* copy inbuf to outbuf */
for (i = 0; i < rows; i++) {
for (j = 0; j < cols; j++) {
*q++ = *p;
p += 2;
}
while (j-- > 0 && q[-1] == ' ')
q--;
*q++ = '\n';
}
fwrite(outbuf, 1, q - outbuf, out);
/* clean up allocations */
close(fd);
free(inbuf);
free(outbuf);
free(ctl->in_device);
if (close_stream(out) != 0)
errx(EXIT_FAILURE, _("write error"));
}
/* Some options are applicable when terminal is virtual console. */
static int vc_only(struct setterm_control *ctl, const char *err)
{
if (!ctl->vcterm && err)
warnx(_("terminal %s does not support %s"),
ctl->opt_te_terminal_name, err);
return ctl->vcterm;
}
static void tty_raw(struct termios *saved_attributes, int *saved_fl)
{
struct termios tattr;
fcntl(STDIN_FILENO, F_GETFL, saved_fl);
tcgetattr(STDIN_FILENO, saved_attributes);
fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK);
memcpy(&tattr, saved_attributes, sizeof(struct termios));
tattr.c_lflag &= ~(ICANON | ECHO);
tattr.c_cc[VMIN] = 1;
tattr.c_cc[VTIME] = 0;
tcsetattr(STDIN_FILENO, TCSAFLUSH, &tattr);
}
static void tty_restore(struct termios *saved_attributes, int *saved_fl)
{
fcntl(STDIN_FILENO, F_SETFL, *saved_fl);
tcsetattr(STDIN_FILENO, TCSANOW, saved_attributes);
}
static int select_wait(void)
{
struct timeval tv;
fd_set set;
int ret;
FD_ZERO(&set);
FD_SET(STDIN_FILENO, &set);
tv.tv_sec = 10;
tv.tv_usec = 0;
while ((ret = select(1, &set, NULL, NULL, &tv)) < 0) {
if (errno == EINTR)
continue;
err(EXIT_FAILURE, _("select failed"));
}
return ret;
}
static int resizetty(void)
{
/*
* \e7 Save current state (cursor coordinates, attributes,
* character sets pointed at by G0, G1).
* \e[r Set scrolling region; parameters are top and bottom row.
* \e[32766E Move cursor down 32766 (INT16_MAX - 1) rows.
* \e[32766C Move cursor right 32766 columns.
* \e[6n Report cursor position.
* \e8 Restore state most recently saved by \e7.
*/
static const char *getpos = "\e7\e[r\e[32766E\e[32766C\e[6n\e8";
char retstr[32];
int row, col;
size_t pos;
ssize_t rc;
struct winsize ws;
struct termios saved_attributes;
int saved_fl;
if (!isatty(STDIN_FILENO))
errx(EXIT_FAILURE, _("stdin does not refer to a terminal"));
tty_raw(&saved_attributes, &saved_fl);
if (write_all(STDIN_FILENO, getpos, strlen(getpos)) < 0) {
warn(_("write failed"));
tty_restore(&saved_attributes, &saved_fl);
return 1;
}
for (pos = 0; pos < sizeof(retstr) - 1;) {
if (0 == select_wait())
break;
if ((rc =
read(STDIN_FILENO, retstr + pos,
sizeof(retstr) - 1 - pos)) < 0) {
if (errno == EINTR)
continue;
warn(_("read failed"));
tty_restore(&saved_attributes, &saved_fl);
return 1;
}
pos += rc;
if (retstr[pos - 1] == 'R')
break;
}
retstr[pos] = 0;
tty_restore(&saved_attributes, &saved_fl);
rc = sscanf(retstr, "\033[%d;%dR", &row, &col);
if (rc != 2) {
warnx(_("invalid cursor position: %s"), retstr);
return 1;
}
memset(&ws, 0, sizeof(struct winsize));
ioctl(STDIN_FILENO, TIOCGWINSZ, &ws);
ws.ws_row = row;
ws.ws_col = col;
ioctl(STDIN_FILENO, TIOCSWINSZ, &ws);
return 0;
}
static void perform_sequence(struct setterm_control *ctl)
{
int result;
/* -reset. */
if (ctl->opt_reset)
putp(ti_entry("rs1"));
/* -resize. */
if (ctl->opt_resize)
if (resizetty())
warnx(_("reset failed"));
/* -initialize. */
if (ctl->opt_initialize)
putp(ti_entry("is2"));
/* -cursor [on|off]. */
if (ctl->opt_cursor) {
if (ctl->opt_cu_on)
putp(ti_entry("cnorm"));
else
putp(ti_entry("civis"));
}
/* -linewrap [on|off]. */
if (ctl->opt_linewrap)
fputs(ctl->opt_li_on ? "\033[?7h" : "\033[?7l", stdout);
/* -repeat [on|off]. */
if (ctl->opt_repeat && vc_only(ctl, "--repeat"))
fputs(ctl->opt_rep_on ? "\033[?8h" : "\033[?8l", stdout);
/* -appcursorkeys [on|off]. */
if (ctl->opt_appcursorkeys && vc_only(ctl, "--appcursorkeys"))
fputs(ctl->opt_appck_on ? "\033[?1h" : "\033[?1l", stdout);
/* -default. Vc sets default rendition, otherwise clears all
* attributes. */
if (ctl->opt_default) {
if (vc_only(ctl, NULL))
printf("\033[0m");
else
putp(ti_entry("sgr0"));
}
/* -foreground black|red|green|yellow|blue|magenta|cyan|white|default. */
if (ctl->opt_foreground)
printf("\033[3%c%s", '0' + ctl->opt_fo_color, "m");
/* -background black|red|green|yellow|blue|magenta|cyan|white|default. */
if (ctl->opt_background)
printf("\033[4%c%s", '0' + ctl->opt_ba_color, "m");
/* -ulcolor [bright] black|red|green|yellow|blue|magenta|cyan|white. */
if (ctl->opt_ulcolor && vc_only(ctl, "--ulcolor"))
printf("\033[1;%d]", ctl->opt_ul_color);