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50 lines
1.1 KiB
Bash
50 lines
1.1 KiB
Bash
exists() # checks executables listed in $@ against the $PATH
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{
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v=1
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while [ "$#" -gt 0 ]; do
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arg="$1"
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shift 1
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case "$arg" in ''|*/) continue ;; esac
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x="${arg##*/}"
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z="${arg%/*}"
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[ ! -f "$z/$x" ] || [ ! -x "$z/$x" ] && [ "$z/$x" = "$arg" ] && continue
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[ "$x" = "$z" ] && [ -x "$z/$x" ] && [ ! -f "$arg" ] && z=
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p=":$z:$PATH"
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while [ "$p" != "${p#*:}" ]; do
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p="${p#*:}"
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d="${p%%:*}"
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{ [ -f "$d/$x" ] && [ -x "$d/$x" ] && \
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{ printf %s\\n "$d/$x"; v=0; break; }; } || :
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done
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done
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return "$v"
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}
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if [ -n "$CROSS_COMPILE" ]; then
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case "$CROSS_COMPILE" in
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*'-mingw32'*) OS='Win32';;
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*'-msdosdjgpp'*) OS='DOS';;
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*);;
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esac
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fi
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if [ -z "$CROSS_COMPILE" ] || [ -z "$OS" ]; then
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case "$(uname)" in
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'Linux') OS='Linux';;
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*'BSD') OS='BSD';;
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'Darwin') OS='Darwin';;
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'CYGWIN'*) OS='Cygwin';;
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'Haiku') OS='Haiku';;
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'MINGW'*) OS='Win32';;
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*) OS="Win32";;
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esac
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fi
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DISTRO=''
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if [ -e /etc/lsb-release ]; then
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. /etc/lsb-release
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DISTRO="(${DISTRIB_DESCRIPTION} ${DISTRIB_RELEASE})"
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fi
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echo "Checking operating system ... $OS ${DISTRO}"
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