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963 B
963 B
ztail
Instructions
Write a program that behaves like a simplified tail command but which takes at least one file as argument.
The only option to be handled is -c and will be used in all the tests as the first argument, with positive values.
For this program the os package can be used.
Handle the errors by returning a non-zero exit status but process all the files.
If several files are given, print a newline and the file name between each one of them (see below).
Usage
If file1.txt & file2.txt contains :
abcdefghijklmnopqrstuvwxyz
Normal cases :
$ go run . -c 4 file1.txt
xyz
$ go run . -c 4 file1.txt file2.txt
==> file1.txt <==
xyz
==> file2.txt <==
xyz
$
Error cases :
$ go run . -c 4 file1.txt nonexisting1.txt file2.txt nonexisting2.txt
==> file1.txt <==
xyz
open nonexisting1.txt: no such file or directory
==> file2.txt <==
xyz
open nonexisting2.txt: no such file or directory
$ echo $?
1
$