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The shell will normally treat [xyz] as a character class, and attempt to match filenames on that basis. But if it finds no file matches for the expansion, it will instead pass the original characters as the argument:

% ls t0 t1 % echo t[012] t0 t1 % echo t[xy] t[xy] %

It isn't entirely clear to me what your filename is, or what your code is doing, but I suspect the shell behaviour is causing the confusion.

In reply to Re: Why does system("mv $x $y") not work when it works at the command line? by hv
in thread Why does system("mv $x $y") not work when it works at the command line? by Cody Fendant

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