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06-16-2008

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It's not clear how you are invoking the shell from C, or vice versa. If you want to capture the output from a shell command in C, the customary way to do that is with popen()

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NOHUP(1)                                                           User Commands                                                          NOHUP(1)

NAME

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DESCRIPTION

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       --help display this help and exit

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GNU coreutils 8.28                                                 January 2018                                                           NOHUP(1)