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rc-local-generator: add comment explaining the background of the generator

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This is not obvious, hence it deserves some form of documentation.
However, it's also ultimately an implementation detail, hence let's not
add this to the man page, but as a code comment, that is visible right
at the top of source file.

Fixes: #10675
This commit is contained in:
Lennart Poettering 2018-11-16 22:00:35 +01:00 committed by Zbigniew Jędrzejewski-Szmek
parent 6917857ed4
commit bca89fe84d
1 changed files with 6 additions and 0 deletions
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6
src/rc-local-generator/rc-local-generator.c
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@ -11,6 +11,12 @@
static const char *arg_dest = "/tmp";
/* So you are reading this, and might wonder: why is this implemented as a generator rather than as a plain, statically
* enabled service that carries appropriate ConditionFileIsExecutable= lines? The answer is this: conditions bypass
* execution of a service's binary, but they have no influence on unit dependencies. Thus, a service that is
* conditioned out will still act as synchronization point in the dependency tree, and we'd rather not have that for
* these two legacy scripts. */
static int add_symlink(const char *service, const char *where) {
const char *from, *to;
int r;