Re^3: Writing a parser

Actually I just tried that and it won't work for me unless it's a true executable. If I try to use a perl script it actually gets passed to bash for some reason.

Unless I'm doing something wrong of course...

[root@spoonbill root]$ cat /sbin/parser
#!/usr/bin/perl

while (<>) {
  print "line: $_";
}

[root@spoonbill root]$ cat scr
#!/sbin/parser
this
is
my
file
[download]

This works:

[root@spoonbill root]$ /sbin/parser scr
line: #!/sbin/parser
line: this
line: is
line: my
line: file
line:
[download]

This does not:

[root@spoonbill root]$ ./scr
./scr: line 2: this: command not found
./scr: line 3: is: command not found
./scr: line 4: my: command not found
Usage: file [-bciknsvzL] [-f namefile] [-m magicfiles] file...
Usage: file -C [-m magic]
[download]

(All run as root just in case there was a permission problem)

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Re^4: Writing a parser by traveler (Parson) on Jan 30, 2008 at 00:01 UTC
I'm sorry to tell you, but on Linux, that is not allowed. On * nix systems the `exec` family of calls is used to start processes. From the execve(2) man page: execve() executes the program pointed to by filename. filename must be either a binary executable, or a script starting with a line of the form "`#! interpreter [arg]`". In the latter case, the interpreter must be a valid pathname for an executable which is not itself a script, which will be invoked as `interpreter [arg] filename` Note where it says, "the interpreter...is not itself a script". So you will have to use `#!/usr/bin/perl /path/to/my/script` [download] --traveler	[reply] [d/l] [select]
Re^4: Writing a parser by Zielony (Acolyte) on Jan 29, 2008 at 22:43 UTC
Yeah, here is the problem. I was trying exactly as you.	[reply]