Tail.vbs borrows shamelessy from unix’ tail command, and more or less performs the same function: to obtain the last N lines of a textfile (the tail).<\/p>\n
Usage 1<\/b>\u00a0(content is obtained from the filename given on the commandline):
\n[cscript] TAIL[.vbs] path+filename startline [numberlines]\u00a0<\/i>
\nwhere ‘startline’ is counted from the end of the file, and numberlines is how many lines to obtain after that\u00a0 point, and defaults to “through end-of-file”
\nIf your filename happens to be a number, be sure to include a full or relative path in front of it so it will be interpreted as a filename. F\/e, if you have a file called 6, or 3.2, refer to it like: .\\3.2 or c:\\x\\6<\/p>\n
Usage 2<\/b>\u00a0(content is obtained through the pipe)
\n… | CSCRIPT TAIL.VBS startline [numberlines]\u00a0<\/i>
\nSame idea, but CSCRIPT must be used to launch the vbs, it will not run implicitly.<\/p>\n
testfile:
\n3 from end
\n2 from end
\n1 from end<\/p>\n
examples:
\ntail testfile 3 1 == 3 from end
\ntail testfile 3\u00a0\u00a0 == 3 from end [crlf]2 from end[crlf]1 from end
\ntail testfile 1\u00a0\u00a0 == 1 from end
\ntype testfile | cscript tail.vbs 3 1 == 3 from end<\/p>\n
‘======== begin vbscript “tail”
\nset fso=createobject(“scripting.filesystemobject”)
\nargcnt=wscript.arguments.count
\nif argcnt>0 then file=wscript.arguments(0)
\nif argcnt>1 then tail=wscript.arguments(1)+1
\ntailend=0
\nselect case argcnt
\ncase 1
\n‘one arg, only interp as line number, use stdin as file
\nif not isnumeric(file) then wscript.quit
\nb=””
\non error resume next
\nb=wscript.stdin.readall
\nif b=”” then wscript.quit
\ntail=file+1
\ncase 2
\n‘two args: file and line, or two lines and stdin for file
\nif isnumeric(file) then ‘two numbers
\nb=””
\non error resume next
\nb=wscript.stdin.readall
\nif b=”” then wscript.quit
\ntail=file+1
\ntailend=tail-wscript.arguments(1)
\nelse
\nset a=fso.opentextfile(file,1) ‘non-number, use as file
\nb=a.readall
\nend if
\ncase 3
\n‘easiest: file, line1, line2
\ntailend=tail-wscript.arguments(2)
\nset a=fso.opentextfile(file,1)
\nb=a.readall
\nend select
\np=-1
\nfor i=1 to tail
\nif i=tailend+1 then p2=p
\np=instrrev(b,vbcrlf,p)
\nif p=0 then
\np=1
\nexit for
\nend if
\nnext
\nif p2>0 then c=mid(b,p,p2-p) else c=mid(b,p)
\nwscript.echo mid(c,3)
\n‘======= end vbscript<\/i><\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"inline_featured_image":false,"iawp_total_views":2},"question-category":[55],"question_tags":[],"class_list":["post-9204","question","type-question","status-publish","hentry","question-category-programming"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/computing.net\/answers\/wp-json\/wp\/v2\/question\/9204","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/computing.net\/answers\/wp-json\/wp\/v2\/question"}],"about":[{"href":"https:\/\/computing.net\/answers\/wp-json\/wp\/v2\/types\/question"}],"author":[{"embeddable":true,"href":"https:\/\/computing.net\/answers\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/computing.net\/answers\/wp-json\/wp\/v2\/comments?post=9204"}],"wp:attachment":[{"href":"https:\/\/computing.net\/answers\/wp-json\/wp\/v2\/media?parent=9204"}],"wp:term":[{"taxonomy":"question-category","embeddable":true,"href":"https:\/\/computing.net\/answers\/wp-json\/wp\/v2\/question-category?post=9204"},{"taxonomy":"question_tags","embeddable":true,"href":"https:\/\/computing.net\/answers\/wp-json\/wp\/v2\/question_tags?post=9204"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}