From f366d58dc1fe51b300167446597750d29687c3c5 Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Wed, 12 Feb 2014 03:30:10 +0100 Subject: [PATCH] pager: support SYSTEMD_LESS environment variable This allows customization of the arguments used by less. The main motivation is that some folks might not like having --no-init on every invocation of less. --- man/journalctl.xml | 4 ++++ man/localectl.xml | 4 ++++ man/loginctl.xml | 4 ++++ man/machinectl.xml | 4 ++++ man/systemctl.xml | 4 ++++ man/systemd-analyze.xml | 4 ++++ man/timedatectl.xml | 4 ++++ src/shared/pager.c | 9 ++++++--- 8 files changed, 34 insertions(+), 3 deletions(-) diff --git a/man/journalctl.xml b/man/journalctl.xml index 3b05e80fc1..18a1b9ef2d 100644 --- a/man/journalctl.xml +++ b/man/journalctl.xml @@ -887,6 +887,10 @@ this to an empty string or the value cat is equivalent to passing . + $SYSTEMD_LESS + $SYSTEMD_LESS overrides the + default options passed to less + (FRSXMK). diff --git a/man/localectl.xml b/man/localectl.xml index 0950cce97d..238757c2e5 100644 --- a/man/localectl.xml +++ b/man/localectl.xml @@ -265,6 +265,10 @@ this to an empty string or the value cat is equivalent to passing . + $SYSTEMD_LESS + $SYSTEMD_LESS overrides the + default options passed to less + (FRSXMK). diff --git a/man/loginctl.xml b/man/loginctl.xml index 13105d4dcd..ede869f394 100644 --- a/man/loginctl.xml +++ b/man/loginctl.xml @@ -486,6 +486,10 @@ this to an empty string or the value cat is equivalent to passing . + $SYSTEMD_LESS + $SYSTEMD_LESS overrides the + default options passed to less + (FRSXMK). diff --git a/man/machinectl.xml b/man/machinectl.xml index cabdbac962..2e7fa3bf8d 100644 --- a/man/machinectl.xml +++ b/man/machinectl.xml @@ -311,6 +311,10 @@ this to an empty string or the value cat is equivalent to passing . + $SYSTEMD_LESS + $SYSTEMD_LESS overrides the + default options passed to less + (FRSXMK). diff --git a/man/systemctl.xml b/man/systemctl.xml index ed1bf4813a..1b0f8e5e2d 100644 --- a/man/systemctl.xml +++ b/man/systemctl.xml @@ -1479,6 +1479,10 @@ kobject-uevent 1 systemd-udevd-kernel.socket systemd-udevd.service equivalent to passing . + $SYSTEMD_LESS + $SYSTEMD_LESS overrides the + default options passed to less + (FRSXMK). diff --git a/man/systemd-analyze.xml b/man/systemd-analyze.xml index cbf59e0a1a..54479e4876 100644 --- a/man/systemd-analyze.xml +++ b/man/systemd-analyze.xml @@ -335,6 +335,10 @@ $ eog targets.svg equivalent to passing . + $SYSTEMD_LESS + $SYSTEMD_LESS overrides the + default options passed to less + (FRSXMK). diff --git a/man/timedatectl.xml b/man/timedatectl.xml index beda304854..be66993e15 100644 --- a/man/timedatectl.xml +++ b/man/timedatectl.xml @@ -239,6 +239,10 @@ this to an empty string or the value cat is equivalent to passing . + $SYSTEMD_LESS + $SYSTEMD_LESS overrides the + default options passed to less + (FRSXMK). diff --git a/src/shared/pager.c b/src/shared/pager.c index 72a29f2285..55b13d6ff6 100644 --- a/src/shared/pager.c +++ b/src/shared/pager.c @@ -84,14 +84,17 @@ int pager_open(bool jump_to_end) { /* In the child start the pager */ if (pager_pid == 0) { + const char* less_opts; dup2(fd[0], STDIN_FILENO); close_pipe(fd); + less_opts = getenv("SYSTEMD_LESS"); + if (!less_opts) + less_opts = "FRSXMK"; if (jump_to_end) - setenv("LESS", "FRSXMK+G", 1); - else - setenv("LESS", "FRSXMK", 1); + less_opts = strappenda(less_opts, " +G"); + setenv("LESS", less_opts, 1); /* Make sure the pager goes away when the parent dies */ if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)