[newlib-cygwin] Cygwin: Correct /proc/*/stat for processes without ctty
Corinna Vinschen
corinna@sourceware.org
Thu Nov 10 09:09:14 GMT 2022
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=59b8ee7d7066b9a3f39e1c765d0cecb5d9bc07fd
commit 59b8ee7d7066b9a3f39e1c765d0cecb5d9bc07fd
Author: Andy Koppe <andy.koppe@gmail.com>
Date: Wed Nov 9 20:34:30 2022 +0000
Cygwin: Correct /proc/*/stat for processes without ctty
Report 0 instead of 268435455 (i.e. 0xFFFFFFF) in the tty field of
/proc/*/stat for processes without a controlling terminal. This is what
the procps utility expects when selecting or excluding such processes.
Diff:
---
winsup/cygwin/fhandler/process.cc | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/winsup/cygwin/fhandler/process.cc b/winsup/cygwin/fhandler/process.cc
index a8c17f1b0..b0aef2ebe 100644
--- a/winsup/cygwin/fhandler/process.cc
+++ b/winsup/cygwin/fhandler/process.cc
@@ -1092,9 +1092,11 @@ format_process_stat (void *data, char *&destbuf)
int nice = 0;
/* ctty maj is 31:16, min is 15:0; tty_nr s/b maj 15:8, min 31:20, 7:0;
maj is 31:16 >> 16 & fff << 8; min is 15:0 >> 8 & ff << 20 | & ff */
- int tty_nr = (((p->ctty >> 8) & 0xff) << 20)
- | (((p->ctty >> 16) & 0xfff) << 8)
- | (p->ctty & 0xff);
+ int tty_nr = 0;
+ if (p->ctty > 0)
+ tty_nr = (((p->ctty >> 8) & 0xff) << 20)
+ | (((p->ctty >> 16) & 0xfff) << 8)
+ | (p->ctty & 0xff);
if (p->process_state & PID_EXITED)
strcpy (cmd, "<defunct>");
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