tmp=$(tempfile)
tmp=$(mktemp)
tempfile
is a Debian specific utility for creating temporary files. Its man page notes:
tempfile is deprecated; you should use mktemp(1) instead.
Neither tempfile
nor mktemp
are POSIX, but tempfile
is Debian specific while mktemp
works on GNU, OSX, BusyBox, *BSD and Solaris.
ShellCheck will not recognize when a function overrides this name.
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