[freeipa PR#3268][opened] [Backport][ipa-4-6] ipa-backup: better error message if ENOSPC

[fcami]

URL: https://github.com/freeipa/freeipa/pull/3268
Author: fcami
 Title: #3268: [Backport][ipa-4-6] ipa-backup: better error message if ENOSPC
Action: opened

PR body:
"""
MANUAL BACKPORT of https://github.com/freeipa/freeipa/pull/3112

The main change is that ipa-4-6 has:
filename = encrypt_file(filename, keyring)
while HEAD has:
filename = encrypt_file(filename)
due to https://github.com/freeipa/freeipa/commit/8e165480ace76ab97e40e9396293eccff3...

########

When the destination directory cannot store the complete backup
ipa-backup fails but does not explain why.
This commit adds error-checking to db2ldif(), db2bak() and
finalize_backup() and enhances the error message.

Fixes: https://pagure.io/freeipa/issue/7647
Signed-off-by: François Cami 
Reviewed-By: Florence Blanc-Renaud 
Reviewed-By: Tibor Dudlák 
Reviewed-By: Christian Heimes 
Reviewed-By: Thomas Woerner 
"""

To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/3268/head:pr3268
git checkout pr3268

[freeipa PR#3268][closed] [Backport][ipa-4-6] ipa-backup: better error message if ENOSPC

[fcami]

URL: https://github.com/freeipa/freeipa/pull/3268
Author: fcami
 Title: #3268: [Backport][ipa-4-6] ipa-backup: better error message if ENOSPC
Action: closed

To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/3268/head:pr3268
git checkout pr3268