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Augeas reads `/etc/fstab` with white spaces more reliably Previously, Augeas was not able to parse lines in the `/etc/fstab` file if they had white spaces at the beginning. This sometime caused problems in software tools that use Augeas, such as the *virt-v2v* utility or the *Puppet* management tool. With this update, the Fstab lens of Augeas correctly ignores white spaces at the beginning of lines. As a result, Augeas now reads `/etc/fstab` as expected.
Description of problem: If any line with a filesystem specification in /etc/fstab has whitespace at the beginning, the Fstab lens cannot parse it. This seems supported by tools, and there were reports of customers with such /etc/fstab in working systems. Steps to Reproduce: 1. edit /etc/fstab, and add whitespaces at the beginning of a line that contains a filesystem 2. run `augtool` 3. in the augtool prompt, run `ls /augeas//error` Actual results: augtool> ls /augeas//error pos = 221 line = 9 char = 2 lens/ = /usr/share/augeas/lenses/dist/fstab.aug:34.12-.42: message = Iterated lens matched less than it should (the actual values of 'pos', 'line' and 'char' depend on the actual file) Expected results: 1. no errors printed 2. the same output of `print /files/etc/fstab/` for both /etc/fstab without the whitespaces added and with the whitespaces Additional info: I just sent an PR to upstream for this: https://github.com/hercules-team/augeas/pull/544
Reproduced it with package: augeas-1.4.0-5.el7.x86_64 Steps: 1. edit /etc/fstab, and add whitespaces at the beginning of the following line: /dev/mapper/rhel_amd--xxx--4--1-home /home xfs defaults 0 0 2. run the augtool command: augtool> print /files/etc/fstab augtool> ls /augeas//error pos = 406 line = 11 char = 2 lens/ = /usr/share/augeas/lenses/dist/fstab.aug:34.12-.42: message = Iterated lens matched less than it should
Verified it with package: augeas-1.4.0-6.el7.x86_64 Steps: 1. edit /etc/fstab and add whitespaces at the beginning of the following line: /dev/mapper/rhel_hp--dlxxx--04-home /home xfs defaults 0 0 2. run the augtool command: #augtool print /files/etc/fstab ... /files/etc/fstab/3 /files/etc/fstab/3/spec = "/dev/mapper/rhel_hp--dlxxx--04-home" /files/etc/fstab/3/file = "/home" /files/etc/fstab/3/vfstype = "xfs" /files/etc/fstab/3/opt = "defaults" /files/etc/fstab/3/dump = "0" /files/etc/fstab/3/passno = "0" ... So verified it.
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, 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-2018:3020