Internal use commands fall back to POSIX version

Workaround for Solaris 10 minimum configuration not including od command

helper/ksh_workaround.sh

@@ -45,6 +45,8 @@ ksh_workaround_loaded() {
   shellspec_redefinable shellspec_fds_check
   shellspec_redefinable shellspec_readfile_once
   shellspec_redefinable shellspec_head
+  shellspec_redefinable shellspec_od
+  shellspec_redefinable shellspec_hexdump
 
   # for ksh88 and busybox-1.1.3
   # These shells do not allow built-in commands cannot be redefined

lib/general.sh

@@ -944,3 +944,5 @@ shellspec_mv() { "$SHELLSPEC_MV" "$@"; }
 shellspec_rm() { "$SHELLSPEC_RM" "$@"; }
 shellspec_chmod() { "$SHELLSPEC_CHMOD" "$@"; }
 shellspec_sleep() { "$SHELLSPEC_SLEEP" "$@"; }
+shellspec_od() { "$SHELLSPEC_OD" "$@"; }
+shellspec_hexdump() { "$SHELLSPEC_HEXDUMP" "$@"; }

lib/libexec/binary.sh

@@ -3,9 +3,9 @@
 # busybox 1.1.3: `-A n`, `-t o1` not supported
 # busybox 1.10.2: `od -b` not working properly
 od_command() {
-  od -t o1 -v 2>/dev/null && return 0
-  [ $? -eq 127 ] && hexdump -b -v 2>/dev/null && return 0
-  od -b -v
+  shellspec_od -t o1 -v 2>/dev/null && return 0
+  [ $? -eq 127 ] && shellspec_hexdump -b -v 2>/dev/null && return 0
+  shellspec_od -b -v
 }
 
 octal_dump() {

lib/libexec/shellspec.sh

@@ -124,11 +124,12 @@ current_shell() {
 
 # shellcheck disable=SC2295
 command_path() {
-  if [ $# -lt 2 ]; then
-    set -- "" "$1" "${PATH}${SHELLSPEC_PATHSEP}"
-  else
-    set -- "$1" "$2" "${PATH}${SHELLSPEC_PATHSEP}"
-  fi
+  case $# in
+    0 | 1) set -- "" "$1" ;;
+    *) set -- "$1" "$2" ;;
+  esac
+  set -- "$1" "$2" "$PATH" "$SHELLSPEC_POSIX_PATH" "$SHELLSPEC_PATHSEP"
+  set -- "$1" "$2" "${3}${4:+"$5"}${4}${5}"
 
   case $2 in (*/*)
     [ -x "$2" ] || return 1

shellspec

@@ -24,6 +24,7 @@ fi
 export SHELLSPEC_VERSION='0.29.0-dev'
 export SHELLSPEC_CWD="$PWD"
 export SHELLSPEC_PATH=''
+export SHELLSPEC_POSIX_PATH=''
 export SHELLSPEC_GRAMMAR_DSLS=''
 export SHELLSPEC_GRAMMAR_DIRECTIVES=''
 export SHELLSPEC_GRAMMAR_BLOCKS=''
@@ -87,6 +88,10 @@ export SHELLSPEC_RM="rm"
 export SHELLSPEC_LS="ls"
 export SHELLSPEC_SORT="sort"
 export SHELLSPEC_FIND="find"
+export SHELLSPEC_OD="od"
+export SHELLSPEC_HEXDUMP="hexdump"
+
+SHELLSPEC_POSIX_PATH=$(getconf PATH 2>/dev/null) ||:
 
 #shellcheck disable=SC2039,SC3028
 export SHELLSPEC_HOSTNAME="${HOSTNAME:-localhost}"
@@ -229,6 +234,7 @@ abspath SHELLSPEC_PROJECT_ROOT "$SHELLSPEC_PROJECT_ROOT"
   eval "set -- $params"
 }
 
+# shellcheck disable=SC2153
 case $SHELLSPEC_MODE in (init)
   SHELLSPEC_PROJECT_ROOT=${SHELLSPEC_PROJECT_ROOT:-$SHELLSPEC_CWD}
   helperdir=$SHELLSPEC_HELPERDIR
@@ -402,6 +408,8 @@ fi
   command_path SHELLSPEC_LS "ls" ||:
   command_path SHELLSPEC_SORT "sort" ||:
   command_path SHELLSPEC_FIND "find" ||:
+  command_path SHELLSPEC_OD "od" ||:
+  command_path SHELLSPEC_HEXDUMP "hexdump" ||:
 
   if command_path "time" || [ "$SHELLSPEC_BUSYBOX_W32" ]; then
     SHELLSPEC_TIME="time -p"

spec/libexec/binary_spec.sh

@@ -4,8 +4,8 @@ Describe "libexec/binary.sh"
   Include "$SHELLSPEC_LIB/libexec/binary.sh"
 
   Describe 'od_command()'
-    od() { echo "od"; }
-    hexdump() { echo "hexdump"; }
+    shellspec_od() { echo "od"; }
+    shellspec_hexdump() { echo "hexdump"; }
 
     Context "when od command available"
       It 'calls od command'
@@ -15,15 +15,15 @@ Describe "libexec/binary.sh"
     End
 
     Context "when od command not available"
-      od() { echo "od: command not found" >&2; return 127; }
+      shellspec_od() { echo "od: command not found" >&2; return 127; }
       It 'calls hexdump command'
         When call od_command
         The stdout should eq 'hexdump'
       End
     End
 
     Context "when tod command does not support -t option"
-      od() {
+      shellspec_od() {
         [ "$1" = "-t" ] && return 1
         echo "od" "$@"
       }
@@ -35,9 +35,6 @@ Describe "libexec/binary.sh"
   End
 
   Describe 'octal_dump()'
-    od() { @od "$@"; }
-    hexdump() { @hexdump "$@"; }
-
     It 'outputs as octal number'
       Data "abc"
       When call octal_dump