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Add comments in setproctitle.c

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Peter Zhu 2024-05-01 11:31:07 -04:00
parent 4f69d318b8
commit e7d20623cb
1 changed files with 21 additions and 0 deletions
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21
missing/setproctitle.c
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@ -87,8 +87,29 @@ static char **argv1_addr = NULL;
#endif #endif
#if ALLOCATE_ENVIRON #if ALLOCATE_ENVIRON
/* system_environ is the value of environ before we allocate a custom buffer.
*
* We use this to restore environ in ruby_free_proctitle.
*/
static char **system_environ = NULL; static char **system_environ = NULL;
/* orig_environ is the buffer we allocate for environ.
*
* We use this to free this buffer in ruby_free_proctitle. When we add new
* environment variables using setenv, the system may change environ to a
* different buffer and will not free the original buffer, so we need to hold
* onto this so we can free it in ruby_free_proctitle.
*
* We must not free any of the contents because it may change if the system
* updates existing environment variables.
*/
static char **orig_environ = NULL; static char **orig_environ = NULL;
/* alloc_environ is a copy of orig_environ.
*
* We use this to free all the original string copies that were in orig_environ.
* Since environ could be changed to point to strings allocated by the system
* if environment variables are updated, so we need this to point to the
* original strings.
*/
static char **alloc_environ = NULL; static char **alloc_environ = NULL;
#endif #endif