Bug 1232241
| Summary: | parted -m output is bogus for a blank disk | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Richard W.M. Jones <rjones> |
| Component: | parted | Assignee: | Brian Lane <bcl> |
| Status: | CLOSED NOTABUG | QA Contact: | Release Test Team <release-test-team-automation> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 7.1 | ||
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2015-06-16 22:59:37 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | |||
| Bug Blocks: | 910269 | ||
Also note the return code is 0 (ie. "no error"). Even though the full output shows there is an error. So that's another bug. Also the upstream parted bug tracker is broken. You need to pass -s for script mode to suppress the spaces. And I think you are mistaking the return code from hexdump for that of parted, it does return 1 on an unrecognized disk label. $ parted -m -s ./blank.img u b p 2>/dev/null BYT; /home/bcl/tmp/blank.img:1073741824B:file:512:512:unknown::; $ echo $? 1 $ parted -m -s ./blank.img u b p 2>/dev/null | hexdump -C 00000000 42 59 54 3b 0a 2f 68 6f 6d 65 2f 62 63 6c 2f 74 |BYT;./home/bcl/t| 00000010 6d 70 2f 62 6c 61 6e 6b 2e 69 6d 67 3a 31 30 37 |mp/blank.img:107| 00000020 33 37 34 31 38 32 34 42 3a 66 69 6c 65 3a 35 31 |3741824B:file:51| 00000030 32 3a 35 31 32 3a 75 6e 6b 6e 6f 77 6e 3a 3a 3b |2:512:unknown::;| 00000040 0a |.| 00000041 |
Description of problem: According to the man page: -m, --machine displays machine parseable output Sounds good, unfortunately: $ truncate -s 1G /tmp/blank.img $ parted -m -- /tmp/blank.img unit b print 2>/dev/null | hexdump -C 00000000 0d 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |. | 00000010 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 00000040 20 20 20 20 20 20 20 20 20 20 20 0d 42 59 54 3b | .BYT;| 00000050 0a 2f 74 6d 70 2f 62 6c 61 6e 6b 2e 69 6d 67 3a |./tmp/blank.img:| 00000060 31 30 37 33 37 34 31 38 32 34 42 3a 66 69 6c 65 |1073741824B:file| 00000070 3a 35 31 32 3a 35 31 32 3a 75 6e 6b 6e 6f 77 6e |:512:512:unknown| 00000080 3a 3a 3b 0a |::;.| Printing ^M and lots of spaces is not "machine readable". The output is slightly different on RHEL 7, leading me to believe that it's dumping out the contents of an internal buffer: 00000000 1b 5b 3f 31 30 33 34 68 0d 20 20 20 20 20 20 20 |.[?1034h. | 00000010 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 00000050 20 20 20 0d 42 59 54 3b 0a 2f 74 6d 70 2f 62 6c | .BYT;./tmp/bl| 00000060 61 6e 6b 2e 69 6d 67 3a 31 30 37 33 37 34 31 38 |ank.img:10737418| 00000070 32 34 42 3a 66 69 6c 65 3a 35 31 32 3a 35 31 32 |24B:file:512:512| 00000080 3a 75 6e 6b 6e 6f 77 6e 3a 3a 3b 0a |:unknown::;.| 0000008c Version-Release number of selected component (if applicable): parted-3.1-20.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1. See description above. Expected results: BYT; should be the first line of the output.