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sysctl: allow overwriting of values specified in "later" files

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This commit is contained in:
Kay Sievers 2013-08-15 18:35:03 +02:00
parent de562e00fe
commit 04bf3c1a60
3 changed files with 17 additions and 9 deletions
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9
NEWS
View File

@ -1,5 +1,14 @@
systemd System and Service Manager
CHANGES WITH 206:
* The systemd-sysctl tool does no longer natively read the
file /etc/sysctl.conf. If desired, the file should be
symlinked from /etc/sysctl.d/99-sysctl.conf. Apart from
providing legacy support by a symlink rather than built-in
code, it also makes the otherwise hidden order of application
of the different files visible.
CHANGES WITH 206:
* The documentation has been updated to cover the various new

16
src/sysctl/sysctl.c
View File

@ -135,6 +135,7 @@ static int parse_file(Hashmap *sysctl_options, const char *path, bool ignore_eno
log_debug("parse: %s\n", path);
while (!feof(f)) {
char l[LINE_MAX], *p, *value, *new_value, *property, *existing;
void *v;
int k;
if (!fgets(l, sizeof(l), f)) {
@ -167,13 +168,14 @@ static int parse_file(Hashmap *sysctl_options, const char *path, bool ignore_eno
p = normalize_sysctl(strstrip(p));
value = strstrip(value);
existing = hashmap_get(sysctl_options, p);
existing = hashmap_get2(sysctl_options, p, &v);
if (existing) {
if (!streq(value, existing))
log_warning("Duplicate assignment of %s in file '%s', ignoring.",
p, path);
if (streq(value, existing))
continue;
continue;
log_info("Overwriting earlier assignment of %s in file '%s'.", p, path);
free(hashmap_remove(sysctl_options, p));
free(v);
}
property = strdup(p);
@ -188,7 +190,7 @@ static int parse_file(Hashmap *sysctl_options, const char *path, bool ignore_eno
k = hashmap_put(sysctl_options, property, new_value);
if (k < 0) {
log_error("Failed to add sysctl variable %s to hashmap: %s", property, strerror(-r));
log_error("Failed to add sysctl variable %s to hashmap: %s", property, strerror(-k));
free(property);
free(new_value);
return k;
@ -304,8 +306,6 @@ int main(int argc, char *argv[]) {
goto finish;
}
r = parse_file(sysctl_options, "/etc/sysctl.conf", true);
STRV_FOREACH(f, files) {
k = parse_file(sysctl_options, *f, true);
if (k < 0 && r == 0)

1
units/systemd-sysctl.service.in
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@ -13,7 +13,6 @@ Conflicts=shutdown.target
After=systemd-readahead-collect.service systemd-readahead-replay.service
Before=sysinit.target shutdown.target
ConditionPathIsReadWrite=/proc/sys/
ConditionPathExists=|/etc/sysctl.conf
ConditionDirectoryNotEmpty=|/lib/sysctl.d
ConditionDirectoryNotEmpty=|/usr/lib/sysctl.d
ConditionDirectoryNotEmpty=|/usr/local/lib/sysctl.d