github-mirror/fish-shell
2
0
Fork 0
mirror of https://github.com/fish-shell/fish-shell.git synced 2025-01-23 08:58:46 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

Fix check for valid disowned pgids

Browse Source 
The function `add_disowned_pgid` adds process *group* ids and not
process ids. It multiplies the value by negative 1 to indicate a wait
on a process group, so the original value must be positive.
This commit is contained in:
Mahmoud Al-Qudsi 2018-12-30 10:11:20 -06:00
parent 4a3ac6e91e
commit 040d921fa1
1 changed files with 5 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
src/proc.cpp
View File

@ -354,10 +354,11 @@ typedef unsigned int process_generation_count_t;
static std::vector<pid_t> s_disowned_pids;
void add_disowned_pgid(pid_t pgid) {
// NEVER add our own pgid, or one of the special values,
// or waiting for it will
// snag other processes away.
if (pgid != getpgrp() && (pgid > 0 || pgid < -1)) {
// NEVER add our own (or an invalid) pgid as they are not unique to only
// one job, and may result in a deadlock if we attempt the wait.
if (pgid != getpgrp() && pgid > 0) {
// waitpid(2) is signalled to wait on a process group rather than a
// process id by using the negative of its value.
s_disowned_pids.push_back(pgid * -1);
}
}