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8.4 Invoking xargs

     xargs [option...] [command [initial-arguments]]

xargs exits with the following status:

0
if it succeeds
123
if any invocation of the command exited with status 1-125
124
if the command exited with status 255
125
if the command is killed by a signal
126
if the command cannot be run
127
if the command is not found
1
if some other error occurred.

Exit codes greater than 128 are used by the shell to indicate that a program died due to a fatal signal.