Re^2: Another eval $@ question

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Re^3: Another eval $@ question by ikegami (Patriarch) on Oct 13, 2006 at 05:51 UTC
`system` sets `$?` (not `$!`) to the return value of the child process, including whether it died from a signal. `$!` is only meaningful if `system` returned -1. If `system` didn't return -1, `$!` could be anything (undef, 0, some true value, etc). In your case, `system` did NOT return -1, having successfully run the shell (that in turn printed that error message), so printing `$!` would be wrong. Update: More detailed.	[reply] [d/l] [select]

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Re^3: Another eval $@ question
by ikegami (Patriarch) on Oct 13, 2006 at 05:51 UTC

system sets $? (not $!) to the return value of the child process, including whether it died from a signal. $! is only meaningful if system returned -1. If system didn't return -1, $! could be anything (undef, 0, some true value, etc). In your case, system did NOT return -1, having successfully run the shell (that in turn printed that error message), so printing $! would be wrong.

Update: More detailed.

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