CODEWITHSUNDEEP
perl
WallyZ
WallyZ

Reputation: 332

Perl not finding data files

I have a perl script that is refusing to see existing data files. When I take the code and isolate in a test perl script it works fine but in the main perl script it can't find anything.

Code looks like this:

use Cwd qw(cwd);

my $dir = cwd;
print STDERR "gen-decsplecs : dir $dir : file $ARGV[0]\n";

if (-e $ARGV[0]) {
    print STDERR "gen-declspecs : File Exists : $ARGV[0]\n";
} else {
    print STDERR "gen-declspecs : File does not exist : $ARGV[0]\n";
}

if (-e "C:/Users/walter/Documents/Projects/agar-1.5.0/ada-core/ctxt.h") {
    print STDERR "gen-declspecs : File Exists : C:/Users/walter/Documents/Projects/agar-1.5.0/ada-core/ctxt.h\n";
} else {
    print STDERR "gen-declspecs : File does not exist : C:/Users/walter/Documents/Projects/agar-1.5.0/ada-core/ctxt.h\n";
}

open(F, $ARGV[0]) || die "$ARGV[0]: $!";

This prints :

gen-decsplecs : dir C:/Users/walter/Documents/Projects/agar-1.5.0 : file './ada-core/ctxt.h'
gen-declspecs : File does not exist : './ada-core/ctxt.h'
gen-declspecs : File Exists : C:/Users/walter/Documents/Projects/agar-1.5.0/ada-core/ctxt.h
'./ada-core/ctxt.h': No such file or directory at mk/gen-declspecs.pl line 93.
gen-declspecs.pl failed

So my question is if the code is executing fomr directory :

C:/Users/walter/Documents/Projects/agar-1.5.0

And is looking for file :

./ada-core/ctxt.h

Why does it not exist on the relative path when the full pathed file :

C:/Users/walter/Documents/Projects/agar-1.5.0/ada-core/ctxt.h

does exist? Especially when I have copied the perl to a test script and it does work!!!

Upvotes: 0

Views: 137

Answers (1)

ruakh
ruakh

Reputation: 183514

If this line:

print STDERR "gen-declspecs : File does not exist : $ARGV[0]\n";

(which doesn't include single-quotes) is printing this output:

gen-declspecs : File does not exist : './ada-core/ctxt.h'

(which does), then that means your $ARGV[0] starts and ends with spurious single-quotes. -e isn't going to strip those out; for all it knows, maybe you really are interested in a folder named '. that contains a folder named ada-core that contains a file named ctxt.h'!

To fix this, you need to run your script correctly; don't put spurious single-quotes in the arguments to it.

(If you're coming from a Unix-like environment, you need to be aware that the default Windows shell does not use the same quoting rules at all.)

Upvotes: 1

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