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• BSD does not permute the argument vector at the same points in the
calling sequence as GNU does. The aspects normally used by the
caller (ordering after -1 is returned, value of optind relative to
current positions) are the same, though. (We do fewer variable
swaps.)
из чего можно предположить, что оно переставляет местами argv O_oАК
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A leading ‘+’ indicates that processing should be halted at the firstно в сырцы смотреть чот лень
non-option argument, matching the default behavior of getopt(3). The
default behavior without ‘+’ is to permute non-option argments to the end
of argv.
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ENVIRONMENTахаха
POSIXLY_CORRECT If set, option processing stops when the first non-
option is found and a leading ‘-’ or ‘+’ in the
optstring is ignored.
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