crontab truncates passed in filename to 100 characters

[Henry Paradiz]

If you want to install cron from a file you run crontab [filename]. Unfortunately the filename is truncated to 100 characters in the source code set from #define MAX_FNAME 100

The MAX_FNAME should actually be set to PATH_MAX which is 4096

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: cron 3.0pl1-128.1ubuntu1
ProcVersionSignature: User Name 4.15.0-1048.50-aws 4.15.18
Uname: Linux 4.15.0-1048-aws x86_64
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
Date: Wed Oct 23 13:06:13 2019
Ec2AMI: ami-0977c44707608ee22
Ec2AMIManifest: (unknown)
Ec2AvailabilityZone: us-east-1d
Ec2InstanceType: t2.large
Ec2Kernel: unavailable
Ec2Ramdisk: unavailable
ProcEnviron:
 TERM=xterm-color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=C.UTF-8
 SHELL=/bin/bash
SourcePackage: cron
UpgradeStatus: No upgrade log present (probably fresh install)