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process-util: add TAKE_PID(), similar to TAKE_PTR/TAKE_FD, but for child process...
author
Lennart Poettering
<lennart@poettering.net>
Tue, 27 Mar 2018 13:01:02 +0000
(15:01 +0200)
committer
Lennart Poettering
<lennart@poettering.net>
Wed, 11 Apr 2018 20:30:04 +0000
(22:30 +0200)
src/basic/process-util.h
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diff --git
a/src/basic/process-util.h
b/src/basic/process-util.h
index
e862dbb
..
49d28cd
100644
(file)
--- a/
src/basic/process-util.h
+++ b/
src/basic/process-util.h
@@
-191,3
+191,11
@@
int fork_agent(const char *name, const int except[], unsigned n_except, pid_t *p
#endif
assert_cc(TASKS_MAX <= (unsigned long) PID_T_MAX)
+
+/* Like TAKE_PTR() but for child PIDs, resetting them to 0 */
+#define TAKE_PID(pid) \
+ ({ \
+ pid_t _pid_ = (pid); \
+ (pid) = 0; \
+ _pid_; \
+ })