Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 277 insertions, 0 deletions

diff --git a/src/basic/terminal-util.h b/src/basic/terminal-util.h
new file mode 100644
index 0000000..2a7d48b
--- /dev/null
+++ b/src/basic/terminal-util.h
@@ -0,0 +1,277 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <syslog.h>
+#include <sys/types.h>
+
+#include "macro.h"
+#include "time-util.h"
+
+/* Regular colors */
+#define ANSI_BLACK   "\x1B[0;30m" /* Some type of grey usually. */
+#define ANSI_RED     "\x1B[0;31m"
+#define ANSI_GREEN   "\x1B[0;32m"
+#define ANSI_YELLOW  "\x1B[0;33m"
+#define ANSI_BLUE    "\x1B[0;34m"
+#define ANSI_MAGENTA "\x1B[0;35m"
+#define ANSI_CYAN    "\x1B[0;36m"
+#define ANSI_WHITE   "\x1B[0;37m" /* This is actually rendered as light grey, legible even on a white
+                                   * background. See ANSI_HIGHLIGHT_WHITE for real white. */
+
+#define ANSI_BRIGHT_BLACK   "\x1B[0;90m"
+#define ANSI_BRIGHT_RED     "\x1B[0;91m"
+#define ANSI_BRIGHT_GREEN   "\x1B[0;92m"
+#define ANSI_BRIGHT_YELLOW  "\x1B[0;93m"
+#define ANSI_BRIGHT_BLUE    "\x1B[0;94m"
+#define ANSI_BRIGHT_MAGENTA "\x1B[0;95m"
+#define ANSI_BRIGHT_CYAN    "\x1B[0;96m"
+#define ANSI_BRIGHT_WHITE   "\x1B[0;97m"
+
+#define ANSI_GREY    "\x1B[0;38;5;245m"
+
+/* Bold/highlighted */
+#define ANSI_HIGHLIGHT_BLACK    "\x1B[0;1;30m"
+#define ANSI_HIGHLIGHT_RED      "\x1B[0;1;31m"
+#define ANSI_HIGHLIGHT_GREEN    "\x1B[0;1;32m"
+#define _ANSI_HIGHLIGHT_YELLOW  "\x1B[0;1;33m" /* This yellow is currently not displayed well by some terminals */
+#define ANSI_HIGHLIGHT_BLUE     "\x1B[0;1;34m"
+#define ANSI_HIGHLIGHT_MAGENTA  "\x1B[0;1;35m"
+#define ANSI_HIGHLIGHT_CYAN     "\x1B[0;1;36m"
+#define ANSI_HIGHLIGHT_WHITE    "\x1B[0;1;37m"
+#define ANSI_HIGHLIGHT_YELLOW4  "\x1B[0;1;38;5;100m"
+#define ANSI_HIGHLIGHT_KHAKI3   "\x1B[0;1;38;5;185m"
+#define ANSI_HIGHLIGHT_GREY     "\x1B[0;1;38;5;245m"
+
+#define ANSI_HIGHLIGHT_YELLOW   ANSI_HIGHLIGHT_KHAKI3 /* Replacement yellow that is more legible */
+
+/* Underlined */
+#define ANSI_GREY_UNDERLINE              "\x1B[0;4;38;5;245m"
+#define ANSI_BRIGHT_BLACK_UNDERLINE      "\x1B[0;4;90m"
+#define ANSI_HIGHLIGHT_RED_UNDERLINE     "\x1B[0;1;4;31m"
+#define ANSI_HIGHLIGHT_GREEN_UNDERLINE   "\x1B[0;1;4;32m"
+#define ANSI_HIGHLIGHT_YELLOW_UNDERLINE  "\x1B[0;1;4;38;5;185m"
+#define ANSI_HIGHLIGHT_BLUE_UNDERLINE    "\x1B[0;1;4;34m"
+#define ANSI_HIGHLIGHT_MAGENTA_UNDERLINE "\x1B[0;1;4;35m"
+#define ANSI_HIGHLIGHT_GREY_UNDERLINE    "\x1B[0;1;4;38;5;245m"
+
+/* Other ANSI codes */
+#define ANSI_UNDERLINE "\x1B[0;4m"
+#define ANSI_HIGHLIGHT "\x1B[0;1;39m"
+#define ANSI_HIGHLIGHT_UNDERLINE "\x1B[0;1;4m"
+
+/* Fallback colors: 256 -> 16 */
+#define ANSI_HIGHLIGHT_GREY_FALLBACK             "\x1B[0;1;90m"
+#define ANSI_HIGHLIGHT_GREY_FALLBACK_UNDERLINE   "\x1B[0;1;4;90m"
+#define ANSI_HIGHLIGHT_YELLOW_FALLBACK           "\x1B[0;1;33m"
+#define ANSI_HIGHLIGHT_YELLOW_FALLBACK_UNDERLINE "\x1B[0;1;4;33m"
+
+/* Background colors */
+#define ANSI_BACKGROUND_BLUE "\x1B[44m"
+
+/* Reset/clear ANSI styles */
+#define ANSI_NORMAL "\x1B[0m"
+
+/* Erase characters until the end of the line */
+#define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
+
+/* Move cursor up one line */
+#define ANSI_REVERSE_LINEFEED "\x1BM"
+
+/* Set cursor to top left corner and clear screen */
+#define ANSI_HOME_CLEAR "\x1B[H\x1B[2J"
+
+int reset_terminal_fd(int fd, bool switch_to_text);
+int reset_terminal(const char *name);
+int set_terminal_cursor_position(int fd, unsigned int row, unsigned int column);
+
+int open_terminal(const char *name, int mode);
+
+/* Flags for tweaking the way we become the controlling process of a terminal. */
+typedef enum AcquireTerminalFlags {
+        /* Try to become the controlling process of the TTY. If we can't return -EPERM. */
+        ACQUIRE_TERMINAL_TRY        = 0,
+
+        /* Tell the kernel to forcibly make us the controlling process of the TTY. Returns -EPERM if the kernel doesn't allow that. */
+        ACQUIRE_TERMINAL_FORCE      = 1,
+
+        /* If we can't become the controlling process of the TTY right-away, then wait until we can. */
+        ACQUIRE_TERMINAL_WAIT       = 2,
+
+        /* Pick one of the above, and then OR this flag in, in order to request permissive behaviour, if we can't become controlling process then don't mind */
+        ACQUIRE_TERMINAL_PERMISSIVE = 1 << 2,
+} AcquireTerminalFlags;
+
+/* Limits the use of ANSI colors to a subset. */
+typedef enum ColorMode {
+        /* No colors, monochrome output. */
+        COLOR_OFF,
+
+        /* All colors, no restrictions. */
+        COLOR_ON,
+
+        /* Only the base 16 colors. */
+        COLOR_16,
+
+        /* Only 256 colors. */
+        COLOR_256,
+
+        /* For truecolor or 24bit color support. */
+        COLOR_24BIT,
+
+        _COLOR_INVALID = -EINVAL,
+} ColorMode;
+
+int acquire_terminal(const char *name, AcquireTerminalFlags flags, usec_t timeout);
+int release_terminal(void);
+
+int terminal_vhangup_fd(int fd);
+int terminal_vhangup(const char *name);
+
+int terminal_set_size_fd(int fd, const char *ident, unsigned rows, unsigned cols);
+int proc_cmdline_tty_size(const char *tty, unsigned *ret_rows, unsigned *ret_cols);
+
+int chvt(int vt);
+
+int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
+int ask_char(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
+int ask_string(char **ret, const char *text, ...) _printf_(2, 3);
+
+int vt_disallocate(const char *name);
+
+int resolve_dev_console(char **ret);
+int get_kernel_consoles(char ***ret);
+bool tty_is_vc(const char *tty);
+bool tty_is_vc_resolve(const char *tty);
+bool tty_is_console(const char *tty) _pure_;
+int vtnr_from_tty(const char *tty);
+const char *default_term_for_tty(const char *tty);
+
+int make_console_stdio(void);
+
+int fd_columns(int fd);
+unsigned columns(void);
+int fd_lines(int fd);
+unsigned lines(void);
+
+void columns_lines_cache_reset(int _unused_ signum);
+void reset_terminal_feature_caches(void);
+
+bool on_tty(void);
+bool terminal_is_dumb(void);
+ColorMode get_color_mode(void);
+bool underline_enabled(void);
+bool dev_console_colors_enabled(void);
+
+static inline bool colors_enabled(void) {
+
+        /* Returns true if colors are considered supported on our stdout. */
+        return get_color_mode() != COLOR_OFF;
+}
+
+#define DEFINE_ANSI_FUNC(name, NAME)                            \
+        static inline const char *ansi_##name(void) {           \
+                return colors_enabled() ? ANSI_##NAME : "";     \
+        }
+
+#define DEFINE_ANSI_FUNC_256(name, NAME, FALLBACK)             \
+        static inline const char *ansi_##name(void) {          \
+                switch (get_color_mode()) {                    \
+                        case COLOR_OFF: return "";             \
+                        case COLOR_16: return ANSI_##FALLBACK; \
+                        default : return ANSI_##NAME;          \
+                }                                              \
+        }
+
+static inline const char *ansi_underline(void) {
+        return underline_enabled() ? ANSI_UNDERLINE : ANSI_NORMAL;
+}
+
+#define DEFINE_ANSI_FUNC_UNDERLINE(name, NAME)                          \
+        static inline const char *ansi_##name(void) {                   \
+                return underline_enabled() ? ANSI_##NAME##_UNDERLINE :  \
+                        colors_enabled() ? ANSI_##NAME : "";            \
+        }
+
+
+#define DEFINE_ANSI_FUNC_UNDERLINE_256(name, NAME, FALLBACK)                                                        \
+        static inline const char *ansi_##name(void) {                                                               \
+                switch (get_color_mode()) {                                                                         \
+                        case COLOR_OFF: return "";                                                                  \
+                        case COLOR_16: return underline_enabled() ? ANSI_##FALLBACK##_UNDERLINE : ANSI_##FALLBACK;  \
+                        default : return underline_enabled() ? ANSI_##NAME##_UNDERLINE: ANSI_##NAME;                \
+                }                                                                                                   \
+        }
+
+DEFINE_ANSI_FUNC(normal,            NORMAL);
+DEFINE_ANSI_FUNC(highlight,         HIGHLIGHT);
+DEFINE_ANSI_FUNC(black,             BLACK);
+DEFINE_ANSI_FUNC(red,               RED);
+DEFINE_ANSI_FUNC(green,             GREEN);
+DEFINE_ANSI_FUNC(yellow,            YELLOW);
+DEFINE_ANSI_FUNC(blue,              BLUE);
+DEFINE_ANSI_FUNC(magenta,           MAGENTA);
+DEFINE_ANSI_FUNC(cyan,              CYAN);
+DEFINE_ANSI_FUNC(white,             WHITE);
+DEFINE_ANSI_FUNC_256(grey,          GREY, BRIGHT_BLACK);
+
+DEFINE_ANSI_FUNC(bright_black,      BRIGHT_BLACK);
+DEFINE_ANSI_FUNC(bright_red,        BRIGHT_RED);
+DEFINE_ANSI_FUNC(bright_green,      BRIGHT_GREEN);
+DEFINE_ANSI_FUNC(bright_yellow,     BRIGHT_YELLOW);
+DEFINE_ANSI_FUNC(bright_blue,       BRIGHT_BLUE);
+DEFINE_ANSI_FUNC(bright_magenta,    BRIGHT_MAGENTA);
+DEFINE_ANSI_FUNC(bright_cyan,       BRIGHT_CYAN);
+DEFINE_ANSI_FUNC(bright_white,      BRIGHT_WHITE);
+
+DEFINE_ANSI_FUNC(highlight_black,       HIGHLIGHT_BLACK);
+DEFINE_ANSI_FUNC(highlight_red,         HIGHLIGHT_RED);
+DEFINE_ANSI_FUNC(highlight_green,       HIGHLIGHT_GREEN);
+DEFINE_ANSI_FUNC_256(highlight_yellow,  HIGHLIGHT_YELLOW, HIGHLIGHT_YELLOW_FALLBACK);
+DEFINE_ANSI_FUNC_256(highlight_yellow4, HIGHLIGHT_YELLOW4, HIGHLIGHT_YELLOW_FALLBACK);
+DEFINE_ANSI_FUNC(highlight_blue,        HIGHLIGHT_BLUE);
+DEFINE_ANSI_FUNC(highlight_magenta,     HIGHLIGHT_MAGENTA);
+DEFINE_ANSI_FUNC(highlight_cyan,        HIGHLIGHT_CYAN);
+DEFINE_ANSI_FUNC_256(highlight_grey,    HIGHLIGHT_GREY, HIGHLIGHT_GREY_FALLBACK);
+DEFINE_ANSI_FUNC(highlight_white,       HIGHLIGHT_WHITE);
+
+static inline const char* _ansi_highlight_yellow(void) {
+        return colors_enabled() ? _ANSI_HIGHLIGHT_YELLOW : "";
+}
+
+DEFINE_ANSI_FUNC_UNDERLINE(highlight_underline,             HIGHLIGHT);
+DEFINE_ANSI_FUNC_UNDERLINE_256(grey_underline,              GREY, BRIGHT_BLACK);
+DEFINE_ANSI_FUNC_UNDERLINE(highlight_red_underline,         HIGHLIGHT_RED);
+DEFINE_ANSI_FUNC_UNDERLINE(highlight_green_underline,       HIGHLIGHT_GREEN);
+DEFINE_ANSI_FUNC_UNDERLINE_256(highlight_yellow_underline,  HIGHLIGHT_YELLOW, HIGHLIGHT_YELLOW_FALLBACK);
+DEFINE_ANSI_FUNC_UNDERLINE(highlight_blue_underline,        HIGHLIGHT_BLUE);
+DEFINE_ANSI_FUNC_UNDERLINE(highlight_magenta_underline,     HIGHLIGHT_MAGENTA);
+DEFINE_ANSI_FUNC_UNDERLINE_256(highlight_grey_underline,    HIGHLIGHT_GREY, HIGHLIGHT_GREY_FALLBACK);
+
+int get_ctty_devnr(pid_t pid, dev_t *d);
+int get_ctty(pid_t, dev_t *_devnr, char **r);
+
+int getttyname_malloc(int fd, char **r);
+int getttyname_harder(int fd, char **r);
+
+int ptsname_malloc(int fd, char **ret);
+
+int openpt_allocate(int flags, char **ret_slave);
+int openpt_allocate_in_namespace(pid_t pid, int flags, char **ret_slave);
+int open_terminal_in_namespace(pid_t pid, const char *name, int mode);
+
+int vt_default_utf8(void);
+int vt_reset_keyboard(int fd);
+int vt_restore(int fd);
+int vt_release(int fd, bool restore_vt);
+
+void get_log_colors(int priority, const char **on, const char **off, const char **highlight);
+
+static inline const char* ansi_highlight_green_red(bool b) {
+        return b ? ansi_highlight_green() : ansi_highlight_red();
+}
+
+/* This assumes there is a 'tty' group */
+#define TTY_MODE 0620