Created attachment 8401 [details] configs and logs If printing test-page (from cups web-interface), got error "Exception: open no: No such file or directory" in web-interface If printing text-file (fstab for example, lp /etc/fstab), got error "Exception: open no: No such file or directory" in web-interface. If printing binary file, (head -n 1 /bin/cp >/1;lp -d test /1) all works fine Used printer - hp laserJet pro m402dn Used driver - generic post-script (work fine fron linux-mint and gentoo) Used defaconfig - qemu_x86_84_defconfig
Maybe related to commit 'package/cups: store web-interface files under /usr/share/cups/doc-root' ([1])? [1] https://git.buildroot.net/buildroot/commit/?h=2019.02.x&id=822067294a9949fa79e5ff6c6d8d6a434ef4a7a0
I tried both variants - with this patch and without.
I found the answer myself It's big complex ptobleb with qpdf, cups-filters and ghostscrips patchs sumbitted: http://lists.busybox.net/pipermail/buildroot/2020-April/279672.html http://lists.busybox.net/pipermail/buildroot/2020-April/279676.html http://lists.busybox.net/pipermail/buildroot/2020-April/279677.html http://lists.busybox.net/pipermail/buildroot/2020-April/279673.html There are multiple issues in buildroot that faults cups printing. First trouble is incorrect qpdf buiding. Qpdf is mandatory dependence of cups. In current master, qpdf builds with incorrect --no-random option. On any work< qpdf send 'no such file' error. For example: qpdf /usr/share/cups/data/secret.pdf - This commmand must get PDF file in stdout.But only 'No such file or directory' error present. 0/1 patch fix this by changing configure options to with-random=/dev/random. Next global problem - cups-filters need ghostscript. >From https://github.com/OpenPrinting/cups-filters/blob/master/README : By default, pdftops uses Ghostscript if this does not get changed at compile time, for example by the Linux distribution vendor. 0/2 patch fix id by settinbg ghostscript as default render if ghostscript enabled in voard config. Last trouble - ghostscript building without cups support. 0/3 patch fix is by removing disable-patch option. Now, if cups is enabled, it will be added to dependencies and correct configure options added to ghostscript building. Also fixed ghostscript buildroot building issue with unpleasant hack in configure.ac, which broke pkg-config. It's broke cups search by ghostscript configure script. GHOSTSCRIPT_CUPS_CONFIG_FIX also needed for this task.
All these patches have been applied: https://git.buildroot.org/buildroot/commit/?id=69dfbbd33b2afab0814c5674b0bc7f5464941fbc https://git.buildroot.org/buildroot/commit/?id=59acde11f9f93e99df309b2ed7a14795bedbcfa9 https://git.buildroot.org/buildroot/commit/?id=f9e359d7653f4af32a491e2baf4b6e524554174b Thanks a lot for your contribution!