X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=etc%2Fgrml%2Fscript-functions;h=4d6bcea8f9beae83abd08f44155d299ea54a4a9f;hb=31dc671f573000a4e83b715c2f1e52829d604e1c;hp=1786072d771c8c634af233be48314801582f5b40;hpb=ebd1c1c5d48b3a12ec039783a2f865c251cf76c6;p=grml-etc-core.git

diff --git a/etc/grml/script-functions b/etc/grml/script-functions
index 1786072..4d6bcea 100644
--- a/etc/grml/script-functions
+++ b/etc/grml/script-functions
@@ -48,15 +48,60 @@ setdialog(){
 # }}}
 
 # {{{ check for availability of program(s)
-check4progs(){
-  local RC=''
-  for arg in $* ; do
-    which $arg >/dev/null 2>&1 || RC="$arg"
-  done
-  if [ -n "$RC" ] ; then
-     echo "$RC not installed"
-     return 1
-  fi
+# usage example:
+#       check4progs [-s,-q,--quiet,--silent] arg [arg .... argn]
+#
+# with option given either of:
+#       -s,-q,--quiet,--silent
+#
+# check for available progs but produce no output
+check4progs() {
+    [ -n "${ZSH_VERSION}" ] && emulate -L sh
+    local RTN=0
+    local oldifs="${IFS}"
+    local ARG d found
+    local VERBOSE=1
+
+    case ${1} in
+        -q | -s | --quiet | --silent)
+            VERBOSE=0
+            shift 1
+            ;;
+
+        *)
+            ;;
+    esac
+
+    while [ $# -gt 0 ]
+    do
+        ARG="$1"
+        shift
+
+        found=0
+        IFS=:
+        for d in $PATH
+        do
+            if [ -x "${d}/${ARG}" ]
+            then
+                found=1
+                break
+            fi
+        done
+        IFS="${oldifs}"
+
+        # check for availability
+        if [ ${found} -eq 0 ]
+        then
+            if [ ${VERBOSE} -eq 1 ]
+            then
+                printf "%s: binary not found\n" "${ARG}" >&2
+            fi
+            RTN=1
+        fi
+    done
+
+    # return non zero, if at least one prog is missing!
+    return $RTN
 }
 # }}}
 
@@ -76,8 +121,9 @@ stringinstring(){
 
 # {{{ reread boot command line; echo last parameter's argument or return false.
 getbootparam(){
-  stringinstring " $1=" /proc/cmdline || return 1
-  result="${/proc/cmdline##*$1=}"
+  CMDLINE=$(cat /proc/cmdline)
+  stringinstring " $1=" "$CMDLINE" || return 1
+  result="${CMDLINE##*$1=}"
   result="${result%%[   ]*}"
   echo "$result"
   return 0
@@ -86,7 +132,7 @@ getbootparam(){
 
 # {{{ check boot commandline for specified option
 checkbootparam(){
-  stringinstring " $1" /proc/cmdline
+  stringinfile " $1" /proc/cmdline
   return "$?"
 }
 # }}}
@@ -183,4 +229,4 @@ is_older_than() {
 #}}}
 
 ## END OF FILE #################################################################
-# vim:foldmethod=marker tw=80 ai expandtab shiftwidth=2 tabstop=2
+# vim:foldmethod=marker tw=80 ai expandtab shiftwidth=2 tabstop=8 ft=sh