Bug 185781
| Summary: | ifup clashes with $WINDOW environment variable | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | cody koeninger <codykoeninger> |
| Component: | initscripts | Assignee: | Bill Nottingham <notting> |
| Status: | CLOSED DUPLICATE | QA Contact: | Brock Organ <borgan> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 4 | CC: | mitr, rvokal |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2006-03-18 14:54:37 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Description of problem: This one's hilarious . . . the ifup scripts (eg. /etc/sysconfig/network-scripts/ifup-eth ) contain lines like: ip route replace default ${SRC} ${WINDOW:+window $WINDOW} dev ${REALDEVICE} And guess what? GNU screen sets the environment variable $WINDOW to the number of the current window you're in, so if you're in a non-zero screen window, the tcp window gets set to a small value, killing network performance. Version-Release number of selected component (if applicable): at least fc 2 and 4 How reproducible: run screen, add a window (^t c), switch to that window (^t 1). # netstat -rn Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 0.0.0.0 192.168.38.1 0.0.0.0 UG 0 0 0 # ifup bond0:9 # netstat -rn Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 0.0.0.0 192.168.38.1 0.0.0.0 UG 0 1 0 lo and behold, the tcp window is jacked. Here's why: # echo $WINDOW 1 (or whatever the number of your GNU screen window is) Expected results: the network scripts should rely on something as likely to cause name clashes as $WINDOW Additional info: