Intermixing STDOUT and STDERR to a file

I wrote a program which occassionally calls shell programs which output to STDOUT. I wanted the output from these programs interspersed with the output from my program (which was printing to STDERR). This snippet will do the trick!

# doesnt work ... "&STDOUT" = "&STDERR";
# Assign STDOUT to STDERR

*STDOUT = *STDERR;


# Open STDERR
open STDERR, ">o.txt";

# Print something to STDERR
warn "hi";

# run a subprocess which output to STDOUT
`pgp -h`;

# Print something to STDOUT
print "ho!\n";

# Now ole'! it's all in the same file!
[download]

Comment on Intermixing STDOUT and STDERR to a file Download Code

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RE: Intermixing STDOUT and STDERR to a file by merlyn (Sage) on Sep 29, 2000 at 20:55 UTC
# run a subprocess which output to STDOUT `pgp -h`; [download] Hmm. That's a confusing statement. You've got a void use of backticks (minus 2 for style points), and that's capturing the stdout of the `pgp` command, then discarding it. So, it's not going to `STDOUT` at all. Perhaps what you mean is that the child process stderr is going to Perl's `STDERR`, which you've aliased (not dup'ed) to `STDOUT`. If so, that's not what I would have gotten from the comments. {grin} The normally accepted dup'ing of `STDOUT` to `STDERR` that doesn't raise the uglies of not working with child processes and symbol table glob mangling is: `open STDERR, ">&STDOUT";` [download] -- Randal L. Schwartz, Perl hacker	[reply] [d/l] [select]
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