Hello. I'm using systemd 219 on Ubuntu 15.04. I have the following line in /etc/fstab: \\192.168.1.110\ExtHDD /mnt/nas cifs vers=3.0,nofail,credentials=/etc/net_pass,uid=1000,gid=1000 0 0 "sudo mount /mnt/nas/" works properly in this case. Hovewer, fstab-generator creates an incorrect mount unit: # Automatically generated by systemd-fstab-generator [Unit] SourcePath=/etc/fstab Documentation=man:fstab(5) man:systemd-fstab-generator(8) [Mount] What=\192.168.1.110\ExtHDD Where=/mnt/nas Type=cifs Options=vers=3.0,nofail,credentials=/etc/net_pass,uid=1000,gid=1000 Note a missing backslash before the IP address. "systemctl status mnt-nas.mount" obviously tells that unit wasn't able to start: марта 31 20:23:32 artyom-H97-D3H mount[7360]: mount.cifs: bad UNC (\192.168.1.110\ExtHDD) Let's add more backslashes to the CIFS path: \\\\192.168.1.110\\ExtHDD /mnt/nas cifs vers=3.0,nofail,credentials=/etc/net_pass,uid=1000,gid=1000 0 0 In this case, generated mount unit is correct: # Automatically generated by systemd-fstab-generator [Unit] SourcePath=/etc/fstab Documentation=man:fstab(5) man:systemd-fstab-generator(8) [Mount] What=\\192.168.1.110\ExtHDD Where=/mnt/nas Type=cifs Options=vers=3.0,nofail,x-gvfs-show,credentials=/etc/nas_passwd,uid=1000,gid=1000,cache=loose However, mount commands refuses to work: $ sudo mount /mnt/nas mount.cifs: bad UNC (\\\\192.168.1.110\\ExtHDD) I don't precisely know if fstab entries should contain escape characters (extra backslashes). Nonetheless, fstab-generator and mount command should have the same behaviour anyway.
Note that fstab should contain forward slashes for cifs, e. g. //192.168.1.110/ExtHDD in your case. Where did you see the backslashes documented? This documentation should be fixed. Or was that added by some tool? Which one? Nevertheless, this shouldn't be unescaped by the fstab generator.
This unescaping is already done by getmntent(). With an fstab entry like \\1.2.3.4\stuff /mnt/stuff cifs defaults,nofail 0 0 the me->mnt_fsname is \1.2.3.4\stuff. fstab uses \ as an escape character, so I'm afraid this pretty much behaves as specified and you have to escape \ too if you use them (i. e. use \\\\1.2.3.4...). It's best to avoid those at all and use forward slashes for CIFS mounts.
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