Index: openacs-4/packages/acs-subsite/tcl/email-image-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-subsite/tcl/email-image-procs.tcl,v
diff -u -N -r1.21.2.4 -r1.21.2.5
--- openacs-4/packages/acs-subsite/tcl/email-image-procs.tcl	8 Feb 2024 18:04:05 -0000	1.21.2.4
+++ openacs-4/packages/acs-subsite/tcl/email-image-procs.tcl	26 Feb 2024 09:57:18 -0000	1.21.2.5
@@ -173,19 +173,19 @@
     set bg "xc:$bgcolor"
 
     # Creating an image of the right length where the email will be
-    if {[catch {exec convert -size $size $bg $dest_path} errmsg]} {
+    if {[catch {exec [::util::which convert] -size $size $bg $dest_path} errmsg]} {
         return ""
     }
 
     # Creating the image with the email of the user on it
-    if {[catch {exec convert -font $font_type -fill blue -pointsize $font_size -draw "text 0,$ypos $email" \
+    if {[catch {exec [::util::which convert] -font $font_type -fill blue -pointsize $font_size -draw "text 0,$ypos $email" \
                     $dest_path $dest_path} errmsg]} {
         return ""
     }
 
     if { $transparent eq "" || $transparent eq "1" } {
         # Making the bg color transparent
-        if {[catch {exec convert $dest_path -transparent $bgcolor $dest_path} errmsg]} {
+        if {[catch {exec [::util::which convert] $dest_path -transparent $bgcolor $dest_path} errmsg]} {
             return ""
         }
     }
@@ -258,18 +258,18 @@
     set bg "xc:$bgcolor"
 
     # Creating an image of the right length where the email will be
-    if { [catch { exec convert -size $size $bg $dest_path } ] } {
+    if { [catch { exec [::util::which convert] -size $size $bg $dest_path } ] } {
         # ImageMagick not present
         return
     }
 
     # Creating the image with the email of the user on it
-    exec convert -font $font_type -fill blue -pointsize $font_size -draw "text 0,$ypos $new_email" \
+    exec [::util::which convert] -font $font_type -fill blue -pointsize $font_size -draw "text 0,$ypos $new_email" \
         $dest_path $dest_path
 
     if { $transparent eq "" || $transparent eq "1" } {
         # Making the bg color transparent
-        exec convert $dest_path -transparent $bgcolor $dest_path
+        exec [::util::which convert] $dest_path -transparent $bgcolor $dest_path
     }
 
     set email_image_id [email_image::get_related_item_id -user_id $user_id]
Index: openacs-4/packages/acs-subsite/www/shared/portrait-bits.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-subsite/www/shared/portrait-bits.tcl,v
diff -u -N -r1.20.2.1 -r1.20.2.2
--- openacs-4/packages/acs-subsite/www/shared/portrait-bits.tcl	21 Jul 2020 14:08:50 -0000	1.20.2.1
+++ openacs-4/packages/acs-subsite/www/shared/portrait-bits.tcl	26 Feb 2024 09:57:18 -0000	1.20.2.2
@@ -57,7 +57,7 @@
                 "file" {
                     set input_file [content::revision::get_cr_file_path -revision_id $itemInfo(revision_id)]
                     ad_try {
-                        exec convert $input_file -resize $size $filename
+                        exec [::util::which convert] $input_file -resize $size $filename
                     } on error {errorMsg} {
                         ad_log warning "portrait-bits: convert returned error: $errorMsg"
                         ns_returnfile 200 $default_avatar_mime $default_avatar
@@ -74,7 +74,7 @@
                         where revision_id = :revision_id
                     } -file $input_file
                     ad_try {
-                        exec convert $input_file -resize $size $filename
+                        exec [::util::which convert] $input_file -resize $size $filename
                     } on error {errorMsg} {
                         ad_log warning "portrait-bits: convert returned error: $errorMsg"
                         ns_returnfile 200 $default_avatar_mime $default_avatar
Index: openacs-4/packages/evaluation-portlet/tcl/test/tclwebtest-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/evaluation-portlet/tcl/test/tclwebtest-procs.tcl,v
diff -u -N -r1.6.2.6 -r1.6.2.7
--- openacs-4/packages/evaluation-portlet/tcl/test/tclwebtest-procs.tcl	21 Dec 2021 08:12:33 -0000	1.6.2.6
+++ openacs-4/packages/evaluation-portlet/tcl/test/tclwebtest-procs.tcl	26 Feb 2024 09:57:18 -0000	1.6.2.7
@@ -12,9 +12,9 @@
 
     # Create a temporal file
     set file_name "[ad_tmpdir]/$file_name"
-    exec touch $file_name
-    exec ls / >> $file_name
-    exec chmod 777 $file_name
+    exec [::util::which touch] $file_name
+    exec [::util::which ls] / >> $file_name
+    exec [::util::which chmod[ 777 $file_name
     return $file_name
 }
 
Index: openacs-4/packages/file-storage/tcl/test/webtest-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/file-storage/tcl/test/Attic/webtest-procs.tcl,v
diff -u -N -r1.1.2.14 -r1.1.2.15
--- openacs-4/packages/file-storage/tcl/test/webtest-procs.tcl	27 Nov 2022 10:52:26 -0000	1.1.2.14
+++ openacs-4/packages/file-storage/tcl/test/webtest-procs.tcl	26 Feb 2024 09:57:18 -0000	1.1.2.15
@@ -209,9 +209,9 @@
     } {
         # Create a temporary file
         set file_name "[ad_tmpdir]/$f_name.txt"
-        exec touch $file_name
-        exec ls / >> $file_name
-        exec chmod 777 $file_name
+        exec [::util::which touch] $file_name
+        exec [::util::which ls] / >> $file_name
+        exec [::util::which chmod] 777 $file_name
         return $file_name
     }
 }
Index: openacs-4/packages/xotcl-request-monitor/www/index.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xotcl-request-monitor/www/index.tcl,v
diff -u -N -r1.31.2.8 -r1.31.2.9
--- openacs-4/packages/xotcl-request-monitor/www/index.tcl	6 Oct 2023 09:07:24 -0000	1.31.2.8
+++ openacs-4/packages/xotcl-request-monitor/www/index.tcl	26 Feb 2024 09:57:18 -0000	1.31.2.9
@@ -42,10 +42,10 @@
     set f [open $procloadavg]; set c [read $f]; close $f
     return $c
   }
-  if {![catch {exec sysctl vm.loadavg kern.boottime} result]} {
+  if {![catch {exec [::util::which sysctl] vm.loadavg kern.boottime} result]} {
       return $result
   }
-  if {[set uptime [util::which uptime]] ne ""} {
+  if {[set uptime [::util::which uptime]] ne ""} {
     return [exec $uptime]
   } else {
     set msg "'uptime' command not found on the system"
Index: openacs-4/packages/xowiki/www/ckeditor-images/upload_image.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/www/ckeditor-images/upload_image.tcl,v
diff -u -N -r1.10.2.4 -r1.10.2.5
--- openacs-4/packages/xowiki/www/ckeditor-images/upload_image.tcl	13 Jul 2020 12:02:34 -0000	1.10.2.4
+++ openacs-4/packages/xowiki/www/ckeditor-images/upload_image.tcl	26 Feb 2024 09:57:18 -0000	1.10.2.5
@@ -29,7 +29,9 @@
       set mime_type [::xowiki::guesstype $file_name]
       set tmp_size [ad_file size $upload_tmpfile]
 
-      if {$size ne ""} {exec convert -resize $size $upload_tmpfile $upload_tmpfile}
+      if {$size ne ""} {
+        exec [::util::which convert] -resize $size $upload_tmpfile $upload_tmpfile
+      }
       if {![regexp (image/*|audio/mpeg|application/x-shockwave-flash|application/vnd.adobe.flash-movie|video/mp4) $mime_type]} {
         #template::form::set_error "upload_image" "upload_file" "[_ tlf-resource-integrator.HTMLArea_SelectImageUploadNoImage]"
         break