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basic/log: add a define for path relative to source root

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When using build/ directory inside of the source directory:
__FILE__: ../src/test/test-log.c
RELATIVE_SOURCE_PATH: ..
PROJECT_FILE: src/test/test-log.c

When using a build directory outside of the source directory:
__FILE__: ../../../home/zbyszek/src/systemd-work/src/test/test-log.c
RELATIVE_SOURCE_PATH: ../../../home/zbyszek/src/systemd-work
PROJECT_FILE: src/test/test-log.c
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2019-06-07 14:41:36 +02:00
parent 71b7a6c47e
commit a0b15b4177
3 changed files with 18 additions and 0 deletions
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4
meson.build
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@ -29,6 +29,10 @@ substs.set('PROJECT_VERSION', meson.project_version())
# This is to be used instead of meson.source_root(), as the latter will return
# the wrong result when systemd is being built as a meson subproject
project_source_root = meson.current_source_dir()
relative_source_path = run_command('realpath',
'--relative-to=@0@'.format(meson.current_build_dir()),
project_source_root).stdout().strip()
conf.set_quoted('RELATIVE_SOURCE_PATH', relative_source_path)
want_ossfuzz = get_option('oss-fuzz')
want_libfuzzer = get_option('llvm-fuzz')

3
src/basic/log.h
View File

@ -73,6 +73,9 @@ int log_get_max_level_realm(LogRealm realm) _pure_;
* for the application itself.
*/
assert_cc(STRLEN(__FILE__) > STRLEN(RELATIVE_SOURCE_PATH) + 1)
#define PROJECT_FILE (__FILE__ + STRLEN(RELATIVE_SOURCE_PATH) + 1)
int log_open(void);
void log_close(void);
void log_forget_fds(void);

11
src/test/test-log.c
View File

@ -6,6 +6,7 @@
#include "format-util.h"
#include "log.h"
#include "process-util.h"
#include "string-util.h"
#include "util.h"
assert_cc(LOG_REALM_REMOVE_LEVEL(LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, LOG_FTP | LOG_DEBUG))
@ -26,6 +27,14 @@ assert_cc(!IS_SYNTHETIC_ERRNO(0));
#define X100(x) X10(X10(x))
#define X1000(x) X100(X10(x))
static void test_file(void) {
log_info("__FILE__: %s", __FILE__);
log_info("RELATIVE_SOURCE_PATH: %s", RELATIVE_SOURCE_PATH);
log_info("PROJECT_FILE: %s", PROJECT_FILE);
assert(startswith(__FILE__, RELATIVE_SOURCE_PATH "/"));
}
static void test_log_struct(void) {
log_struct(LOG_INFO,
"MESSAGE=Waldo PID="PID_FMT" (no errno)", getpid_cached(),
@ -68,6 +77,8 @@ static void test_log_syntax(void) {
int main(int argc, char* argv[]) {
int target;
test_file();
for (target = 0; target < _LOG_TARGET_MAX; target++) {
log_set_target(target);
log_open();