6d2553ef2e
Always no quotes for $() statement. We don't need quotes to hold blanks in result: # i=$(echo 1 2 3) # echo $i 1 2 3 # These quotes can make something wrong in some case: # i=$(echo '!') # # i="$(echo '!')" -bash: !: event not found # No real problem for current code, only to use a better code style. Change-Id: Ib31b49680286600c9a182875122a0a752d3f8a33 Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
92 lines
2.1 KiB
Bash
92 lines
2.1 KiB
Bash
# This file contains bash functions that may be used by both guest and host
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# systems.
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# Non-recursive removal of all files except README.*
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function clean_dir {
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local target_dir=$1
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if [ ! -e "$target_dir" ]; then
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mkdir -pv "$target_dir"
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elif [ ! -d "$target_dir" ]; then
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echo >&2 "Not a directory: $target_dir"
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return 1
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fi
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shopt -s nullglob
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local entries=("$target_dir"/*)
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if [ -n "${entries[0]-}" ]; then
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for f in "${entries[@]}"; do
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# Skip directories
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if [ ! -f "$f" ]; then
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continue
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fi
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# Skip README.*
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if [[ $f =~ /README\. ]]; then
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continue
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fi
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rm -f "$f"
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done
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fi
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}
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function is_root {
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if [ $EUID -eq 0 ]; then
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return 0
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else
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return 1
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fi
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}
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function yes_or_no {
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local prompt=$1
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local input=""
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while [ : ]; do
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read -p "$prompt (Y/n): " input
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case "$input" in
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N|n)
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return 1
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;;
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""|Y|y)
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return 0
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;;
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*)
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echo -e "${CError:-}Invalid input: ${CData:-}$input${CReset:-}"
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;;
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esac
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done
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}
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#-------------------------------------------------------------------------------
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# Helpers to incrementally number files via name prefixes
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#-------------------------------------------------------------------------------
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function get_next_file_number {
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local dir=$1
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local ext=${2:-""}
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# Get number of *.log files in directory
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shopt -s nullglob
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if [ -n "$ext" ]; then
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# Count files with specific extension
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local files=("$dir/"*".$ext")
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else
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# Count all files
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local files=("$dir/"*)
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fi
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echo "${#files[*]}"
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}
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function get_next_prefix {
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local dir=$1
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local ext=$2
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# Number of digits in prefix string (default 3)
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local digits=${3:-3}
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# Get number of *.$ext files in $dir
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local cnt=$(get_next_file_number "$dir" "$ext")
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printf "%0${digits}d" "$cnt"
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}
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# vim: set ai ts=4 sw=4 et ft=sh:
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