Bug 1711171
| Summary: | `alternatives --set python /usr/bin/python2` fails with ecode 2 and no explanation on stderr | |||
|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Jiri Danek <jdanek> | |
| Component: | chkconfig | Assignee: | Jan Macku <jamacku> | |
| Status: | CLOSED ERRATA | QA Contact: | Daniel Rusek <drusek> | |
| Severity: | medium | Docs Contact: | ||
| Priority: | unspecified | |||
| Version: | 7.7 | CC: | drusek, jamacku, pematous, pviktori, rkubis | |
| Target Milestone: | rc | |||
| Target Release: | --- | |||
| Hardware: | x86_64 | |||
| OS: | Linux | |||
| Whiteboard: | ||||
| Fixed In Version: | chkconfig-1.7.6-1.el7 | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | ||
| Clone Of: | ||||
| : | 1820089 (view as bug list) | Environment: | ||
| Last Closed: | 2020-09-29 19:43:47 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: | 1820089 | |||
In RHEL 7, there are no alternatives for python; /usr/bin/python is always Python 2. The same issue happens with any missing alternative:
alternatives --set foo /bar
Changing component to chkconfig.
Upstream PR: https://github.com/fedora-sysv/chkconfig/pull/36 This bug will be fixed in RHEL 7.9 Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (chkconfig bug fix and enhancement update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:3890 |
Description of problem: When I spin up fresh RHEL-7.7-20190514.2 qcow image in OpenStack and run alternatives --set python /usr/bin/python2 I get no error message printed and the return value of the above command is 2. This is a bug because of the following promise from the man page of alternatives " DIAGNOSTICS alternatives chatters incessantly about its activities on its standard output channel. If problems occur, alternatives outputs error messages on its standard error channel and returns an exit status of 2. These diagnostics should be self-explanatory; if you do not find them so, please report this as a bug. " If I run with --verbose, I get [root@host-10-0-132-192 ~]# alternatives --set python /usr/bin/python2 --verbose reading /var/lib/alternatives/python [root@host-10-0-132-192 ~]# ls /var/lib/alternatives/python ls: cannot access /var/lib/alternatives/python: No such file or directory I can fix this by issuing /usr/sbin/alternatives --install /usr/bin/python python /usr/bin/python2 1 Version-Release number of selected component (if applicable): [root@host-10-0-132-192 ~]# alternatives --version alternatives version 1.7.4 How reproducible: Always Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info: