56 lines
710 B
Plaintext
56 lines
710 B
Plaintext
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# $FreeBSD$
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IFS=,
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SPECIAL="break,\
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:,\
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continue,\
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. /dev/null,
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eval,
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exec,
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export -p,
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readonly -p,
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set,
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shift 0,
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times,
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trap,
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unset foo"
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UTILS="alias,\
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bg,\
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bind,\
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cd,\
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command echo,\
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echo,\
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false,\
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fc -l,\
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fg,\
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getopts a var,\
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hash,\
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jobs,\
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printf a,\
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pwd,\
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read var < /dev/null,\
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test,\
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true,\
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type ls,\
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ulimit,\
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umask,\
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unalias -a,\
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wait"
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set -e
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# For special built-ins variable assignments affect the shell environment.
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set -- ${SPECIAL}
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for cmd in "$@"
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do
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sh -c "VAR=1; VAR=0 ${cmd}; exit \${VAR}" >/dev/null 2>&1
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done
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# For other built-ins and utilites they do not.
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set -- ${UTILS}
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for cmd in "$@"
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do
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sh -c "VAR=0; VAR=1 ${cmd}; exit \${VAR}" >/dev/null 2>&1
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done
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