Bug 192579
| Summary: | named pipe vs "grep -sr" | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | John Reiser <jreiser> |
| Component: | grep | Assignee: | Tim Waugh <twaugh> |
| Status: | CLOSED DUPLICATE | QA Contact: | Mike McLean <mikem> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 5 | ||
| 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: | 2006-05-21 09:44:37 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: A named pipe interferes with the use of "grep -sr <term> <directory>" to search an entire directory tree in a reliable way. Version-Release number of selected component (if applicable): grep-2.5.1-52.2 How reproducible: Always Steps to Reproduce: 1. mkdir dir1 2. cd dir1; mkfifo fifo 3. cd ..; grep -sr foo . & 4. strace -p <pid-of-grep-above> Actual results: $ strace -p 3044 Process 3044 attached - interrupt to quit open("dir1/fifo", O_RDONLY|O_LARGEFILE ## This shows that grep is blocked waiting for the fifo. Expected results: Under flags "-sr", grep should not wait for fifos. Grep should ignore an empty fifo entirely; and read a non-empty fifo with non-blocking I/O, and assume End-of-File as soon as the read() returns 0 or -1. Or, there should be another command-line flag to specify the behavior "don't wait for fifos", so that there is some reliable way to search a directory tree for strings. Additional info: