diff options
Diffstat (limited to 'functions.sh')
| -rw-r--r-- | functions.sh | 117 |
1 files changed, 92 insertions, 25 deletions
diff --git a/functions.sh b/functions.sh index 1926c40..a4fa946 100644 --- a/functions.sh +++ b/functions.sh @@ -17,7 +17,7 @@ # COLUMNS : may be used by _update_columns() to get the column count # EPOCHREALTIME : potentially used by _update_time() to get the time # GENFUN_MODULES : which of the optional function collections must be sourced -# IFS : multiple warn() operands are joined by its first character +# IFS : affects contains_all(), contains_any() and warn() # INVOCATION_ID : used by from_unit() # PORTAGE_BIN_PATH : used by from_portage() # RC_OPENRC_PID : used by from_runscript() @@ -49,6 +49,96 @@ chdir() } # +# Takes the first parameter as a string comprising zero or more words, composes +# a set consisting of the intersection of those words, then determines whether +# the intersection of the remaining parameters forms a subset thereof. The +# words shall be collected by splitting the string into individual fields, in +# accordance with section 2.6.5 of the Shell Command Language specification. +# Therefore, the value of IFS shall be taken into account. If fewer than two +# parameters are provided, or if the first parameter yields no fields, or if the +# second set is disjoint from - or a superset of - the first, the return value +# shall be greater than 0. +# +contains_all() +{ + [ "$#" -ge 2 ] && IFS=${IFS} awk -f - -- "$@" <<-'EOF' + BEGIN { + ifs = ENVIRON["IFS"] + haystack = ARGV[1] + argc = ARGC + ARGC = 1 + if (length(ifs) == 0) { + FS = "^" + } else if (length(ifs) != 3 || ifs ~ /[^ \t\n]/) { + # Split by the first character of IFS. + FS = "[" substr(ifs, 1, 1) "]" + } else { + # Mimic default field splitting behaviour, per section 2.6.5. + FS = "[ \t\n]+" + sub("^" FS, "", haystack) + } + # In sh, fields are terminated, not separated. + sub(FS "$", "", haystack) + len = split(haystack, words) + for (i = 1; i <= len; i++) { + set2[words[i]] + } + for (i = 2; i < argc; i++) { + set1[ARGV[i]] + } + for (word in set2) { + delete set1[word] + } + for (word in set1) { + exit 1 + } + } + EOF +} + +# +# Takes the first parameter as a string comprising zero or more words then +# determines whether at least one of the remaining parameters can be matched +# against any of those words. The words shall be collected by splitting the +# string into individual fields, in accordance with section 2.6.5 of the Shell +# Command Language specification. Therefore, the value of IFS shall be taken +# into account. If fewer than two parameters are provided, or if the first +# parameter yields no fields, or if none of the following parameters can be +# matched, the return value shall be greater than 0. +# +contains_any() +{ + local had_noglob haystack i item needle retval + + [ "$#" -ge 2 ] || return + haystack=$1 + shift + i=0 + case $- in + *f*) + had_noglob=1 + ;; + *) + had_noglob=0 + esac + set -f + for needle; do + if [ "$(( i += 1 ))" -eq 1 ]; then + # shellcheck disable=2086 + set -- ${haystack} + fi + for item; do + [ "${item}" = "${needle}" ] && break 2 + done + done + retval=$? + if [ "${had_noglob}" -eq 0 ]; then + set +f + fi + return "${retval}" +} + +# # Considers the first parameter as an URL then attempts to fetch it with either # curl(1) or wget(1). If the URL does not contain a scheme then the https:// # scheme shall be presumed. Both utilities shall be invoked in a manner that @@ -586,29 +676,6 @@ whenceforth() #------------------------------------------------------------------------------# # -# Considers the first parameter as containing zero or more blank-separated words -# then determines whether any of the remaining parameters can be matched in -# their capacity as discrete words. -# -_contains_word() -{ - local word wordlist - - wordlist=$1 word=$2 - case ${word} in - ''|*[[:blank:]]*) - ;; - *) - case " ${wordlist} " in - *[[:blank:]]"${word}"[[:blank:]]*) - return - ;; - esac - esac - false -} - -# # Determines whether the terminal is a dumb one. # _has_dumb_terminal() @@ -761,7 +828,7 @@ _want_module() local basename basename=${1##*/} - _contains_word "${GENFUN_MODULES}" "${basename%.sh}" + contains_any "${GENFUN_MODULES}" "${basename%.sh}" } # |