diff options
| -rw-r--r-- | ENVIRONMENT.md | 5 | ||||
| -rw-r--r-- | src/basic/proc-cmdline.c | 14 |
2 files changed, 19 insertions, 0 deletions
diff --git a/ENVIRONMENT.md b/ENVIRONMENT.md index 4ace45751f..1ad2addfee 100644 --- a/ENVIRONMENT.md +++ b/ENVIRONMENT.md @@ -21,6 +21,11 @@ All tools: * `$SD_EVENT_PROFILE_DELAYS=1` — if set, the sd-event event loop implementation will print latency information at runtime. +* `$SYSTEMD_PROC_CMDLINE` — if set, may contain a string that is used as kernel + command line instead of the actual one readable from /proc/cmdline. This is + useful for debugging, in order to test generators and other code against + specific kernel command lines. + systemctl: * `$SYSTEMCTL_FORCE_BUS=1` — if set, do not connect to PID1's private D-Bus diff --git a/src/basic/proc-cmdline.c b/src/basic/proc-cmdline.c index 8297a222b7..98c94ed5e2 100644 --- a/src/basic/proc-cmdline.c +++ b/src/basic/proc-cmdline.c @@ -34,8 +34,22 @@ #include "virt.h" int proc_cmdline(char **ret) { + const char *e; assert(ret); + /* For testing purposes it is sometimes useful to be able to override what we consider /proc/cmdline to be */ + e = secure_getenv("SYSTEMD_PROC_CMDLINE"); + if (e) { + char *m; + + m = strdup(e); + if (!m) + return -ENOMEM; + + *ret = m; + return 0; + } + if (detect_container() > 0) return get_process_cmdline(1, 0, false, ret); else |