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From 9d67a3a2d4fd378ca04726c5eb5f31ee222c50e4 Mon Sep 17 00:00:00 2001
From: Jan Synacek <jsynacek@redhat.com>
Date: Tue, 19 Jan 2016 10:17:19 +0100
Subject: [PATCH] basic/terminal-util: introduce SYSTEMD_COLORS environment
variable
... to determine if color output should be enabled. If the variable is not set,
fall back to using on_tty(). Also, rewrite existing code to use
colors_enabled() where appropriate.
Cherry-picked from: 40c9fe4c0862114dab390c8ed16f78cf056b9140
Resolves: #1247963
---
man/systemd.xml | 7 +++++++
src/journal/journalctl.c | 2 +-
src/login/loginctl.c | 2 +-
src/machine/machinectl.c | 2 +-
src/shared/util.c | 13 +++++++++++++
src/shared/util.h | 13 +++++++------
src/systemctl/systemctl.c | 2 +-
7 files changed, 31 insertions(+), 10 deletions(-)
diff --git a/man/systemd.xml b/man/systemd.xml
index eb289f03b7..30005b1ef2 100644
--- a/man/systemd.xml
+++ b/man/systemd.xml
@@ -754,6 +754,13 @@
script runlevel link farms.</para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><varname>$SYSTEMD_COLORS</varname></term>
+
+ <listitem><para>Controls whether colorized output should be generated.
+ </para></listitem>
+ </varlistentry>
+
<varlistentry>
<term><varname>$LISTEN_PID</varname></term>
<term><varname>$LISTEN_FDS</varname></term>
diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c
index 8236d0810b..7058788efa 100644
--- a/src/journal/journalctl.c
+++ b/src/journal/journalctl.c
@@ -2140,7 +2140,7 @@ int main(int argc, char *argv[]) {
flags =
arg_all * OUTPUT_SHOW_ALL |
arg_full * OUTPUT_FULL_WIDTH |
- on_tty() * OUTPUT_COLOR |
+ colors_enabled() * OUTPUT_COLOR |
arg_catalog * OUTPUT_CATALOG |
arg_utc * OUTPUT_UTC;
diff --git a/src/login/loginctl.c b/src/login/loginctl.c
index 6c8a59e7c9..8e3bfbea8a 100644
--- a/src/login/loginctl.c
+++ b/src/login/loginctl.c
@@ -83,7 +83,7 @@ static OutputFlags get_output_flags(void) {
arg_all * OUTPUT_SHOW_ALL |
arg_full * OUTPUT_FULL_WIDTH |
(!on_tty() || pager_have()) * OUTPUT_FULL_WIDTH |
- on_tty() * OUTPUT_COLOR;
+ colors_enabled() * OUTPUT_COLOR;
}
static int list_sessions(int argc, char *argv[], void *userdata) {
diff --git a/src/machine/machinectl.c b/src/machine/machinectl.c
index f1910709d2..ef1214a666 100644
--- a/src/machine/machinectl.c
+++ b/src/machine/machinectl.c
@@ -105,7 +105,7 @@ static OutputFlags get_output_flags(void) {
arg_all * OUTPUT_SHOW_ALL |
arg_full * OUTPUT_FULL_WIDTH |
(!on_tty() || pager_have()) * OUTPUT_FULL_WIDTH |
- on_tty() * OUTPUT_COLOR |
+ colors_enabled() * OUTPUT_COLOR |
!arg_quiet * OUTPUT_WARN_CUTOFF;
}
diff --git a/src/shared/util.c b/src/shared/util.c
index 50925888df..dc51852699 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -8146,3 +8146,16 @@ char *shell_maybe_quote(const char *s) {
return r;
}
+
+bool colors_enabled(void) {
+ const char *colors;
+
+ colors = getenv("SYSTEMD_COLORS");
+ if (!colors) {
+ if (streq_ptr(getenv("TERM"), "dumb"))
+ return false;
+ return on_tty();
+ }
+
+ return parse_boolean(colors) != 0;
+}
diff --git a/src/shared/util.h b/src/shared/util.h
index 7ecfd8571d..b4a4a491f9 100644
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -485,29 +485,30 @@ unsigned lines(void);
void columns_lines_cache_reset(int _unused_ signum);
bool on_tty(void);
+bool colors_enabled(void);
static inline const char *ansi_highlight(void) {
- return on_tty() ? ANSI_HIGHLIGHT_ON : "";
+ return colors_enabled() ? ANSI_HIGHLIGHT_ON : "";
}
static inline const char *ansi_highlight_red(void) {
- return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
+ return colors_enabled() ? ANSI_HIGHLIGHT_RED_ON : "";
}
static inline const char *ansi_highlight_green(void) {
- return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
+ return colors_enabled() ? ANSI_HIGHLIGHT_GREEN_ON : "";
}
static inline const char *ansi_highlight_yellow(void) {
- return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
+ return colors_enabled() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
}
static inline const char *ansi_highlight_blue(void) {
- return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
+ return colors_enabled() ? ANSI_HIGHLIGHT_BLUE_ON : "";
}
static inline const char *ansi_highlight_off(void) {
- return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
+ return colors_enabled() ? ANSI_HIGHLIGHT_OFF : "";
}
int files_same(const char *filea, const char *fileb);
diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
index 89d0b3b399..5d3a85fd95 100644
--- a/src/systemctl/systemctl.c
+++ b/src/systemctl/systemctl.c
@@ -197,7 +197,7 @@ static OutputFlags get_output_flags(void) {
arg_all * OUTPUT_SHOW_ALL |
arg_full * OUTPUT_FULL_WIDTH |
(!on_tty() || pager_have()) * OUTPUT_FULL_WIDTH |
- on_tty() * OUTPUT_COLOR |
+ colors_enabled() * OUTPUT_COLOR |
!arg_quiet * OUTPUT_WARN_CUTOFF;
}