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* pam_motd: Fix segmentation fault when no motd_dir specified (#76)Robert Fairley2018-11-21
| | | | | | | | | | | | This fixes a regression introduced by #69, where motd_path was set to NULL and passed into strdup() if the motd_dir argument was not specified in the configuration file. This caused a segmentation fault. * modules/pam_motd/pam_motd.c: fix checks for NULL in arguments * xtests/ add test scripts and config file * xtests/ add running * xtests/tst-pam_motd4.pamd: create * xtests/ create
* pam_motd: Support multiple motd paths specified, with filename overrides (#69)Robert Fairley2018-11-19
Adds specifying multiple paths to motd files and motd.d directories to be displayed. A colon-separated list of paths is specified as arguments motd and motd_dir to the pam_motd module. This gives packages several options to install motd files to. By default, the paths are, with highest priority first: /etc/motd /run/motd /usr/lib/motd /etc/motd.d/ /run/motd.d/ /usr/lib/motd.d/ Which is equivalent to the following arguments: motd=/etc/motd:/run/motd:/usr/lib/motd motd_dir=/etc/motd.d:/run/motd.d:/usr/lib/motd.d Files with the same filename in a lower-priority directory, as specified by the order in the colon-separated list, are overridden, meaning PAM will not display them. This allows a package to contain motd files under /usr/lib instead of the host configuration in /etc. A service may also write a dynamically generated motd in /run/motd.d/ and have PAM display it without needing a symlink from /etc/motd.d/ installed. Closes #68 * modules/pam_motd/pam_motd.8.xml: update documentation * modules/pam_motd/pam_motd.c: add specifying multiple motd paths * xtests/.gitignore: add generated test script * xtests/ add test source, scripts and config files * xtests/tst-pam_motd.c: create * xtests/ create * xtests/tst-pam_motd1.pamd: create * xtests/ create * xtests/tst-pam_motd2.pamd: create * xtests/ create * xtests/tst-pam_motd3.pamd: create * xtests/ create