diff --git a/doc/execl-envfile.md b/doc/execl-envfile.md
new file mode 100644
index 0000000000000000000000000000000000000000..df0903617d5648d3803a8efd8d9a0557e6611aea
--- /dev/null
+++ b/doc/execl-envfile.md
@@ -0,0 +1,82 @@
+title: The 66-tools Suite: execl-envfile
+author: Eric Vidal <eric@obarun.org>
+
+[66-tools](index.html)
+
+[Software](https://web.obarun.org/software)
+
+[obarun.org](https://web.obarun.org)
+
+# execl-envfile
+
+A mix of [s6-envdir](https://skarnet.org/software/s6/s6-envdir.html) and [importas](https://skarnet.org/software/execline/importas.html). Reads files containing variable assignments in the given *file/directory*, adds the variables to the environment and then executes a program.
+
+## Interface
+
+```
+	execl-envfile [ -h ] [ -l ] src prog
+```
+This tool expects to find a regular file or a directory in *src* containing one or multiple `key=value` pair(s). It will parse that file, import the `key=value` and then exec the given *prog* with the modified environment. In case of directory for each file found it apply the same process. *src* can be an absolute or a relative path.
+
+- It opens and reads a file.
+
+- It parses that file.
+
+- It imports the found `key=value` pair(s).
+
+- It substitutes each corresponding *key* with value from that file.
+
+- It unexports the variable(s) if requested.
+
+- It execs *prog* with the modified environment.
+
+
+## Exit codes
+
+- *0* success
+- *100* wrong usage
+- *111* system call failed
+
+## Options
+
+- **-h** : prints this help.
+
+- **-l** : loose; do nothing and execute *prog* directly if *src* does not contain any regular file(s) or *src* does not exist.
+
+## File syntax
+
+*src* is a text file or a directory containing lines of pairs with the syntax being: `key = value`
+Whitespace is permitted before and after *key*, and before or after *value*. Quoting is also possible.
+
+Empty lines or lines containing only whitespace are ignored. Lines beginning with `#` (also after whitespace) are ignored and typically used for comments. Comments are not possible at the end of lines: `key = value # comment` is not a valid comment.
+
+If val begin by a `!` character: `key=!value` the key will be removed from the environment after the substitution. 
+
+## Usage example
+
+```
+	#!/usr/bin/execlineb -P
+	fdmove -c 2 1
+	execl-envfile %%service_admconf%%/ntpd
+	foreground { mkdir -p  -m 0755 ${RUNDIR} } 
+	execl-cmdline -s { ntpd ${CMD_ARGS} }
+	
+```
+
+The equivalent with s6-envdir and importas would be:
+
+```
+	#!/usr/bin/execlineb -P
+	fdmove -c 2 1
+	s6-envdir %%service_admconf%%
+	importas -u RUNDIR RUNDIR
+	importas -u CMD_ARGS CMD_ARGS
+	foreground { mkdir -p  -m 0755 ${RUNDIR} } 
+	execl-cmdline -s { ntpd ${CMD_ARGS} }
+```
+
+where `%%service_admconf%%` contains two named files `RUNDIR` and `CMD_ARGS` written with `/run/openntpd` and `-d -s` respectively. 
+
+## Limits
+
+*src* can not exceed more than `100` files. Each file can not contain more than `4095` bytes or more than `50` `key=value` pairs. 
diff --git a/doc/index.md b/doc/index.md
index 267a94027ec1f6e01d54d5ba26989b72669a1a4a..c316fc045138abc6ab41fc0c20e05941064495ec 100644
--- a/doc/index.md
+++ b/doc/index.md
@@ -80,6 +80,7 @@ Please refer to the [INSTALL.md](https://framagit.org/Obarun/66) file for detail
 
 - [66-echo](66-echo.html)
 - [66-umountall](66-umountall.html)
+- [execl-envfile](execl-envfile.html)
 
 ## Why is 66 necessary?
 
diff --git a/doc/make-html.sh b/doc/make-html.sh
index 6cd223b0055caeb5af26ca762822cecbe9596307..22b88c22d030c320588d9ccf89b7bd255fb8bd22 100755
--- a/doc/make-html.sh
+++ b/doc/make-html.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-html='66-all 66-dbctl 66-disable 66-echo 66-enable 66-env 66-init 66-inresolve 66-inservice 66-instate 66-intree 66-parser 66-scanctl 66-scandir 66-start 66-stop 66-svctl 66-tree 66-update 66-boot 66-hpr 66-shutdown 66-shutdownd 66-umountall 66-update frontend instantiated-service module-service index'
+html='66-all 66-dbctl 66-disable 66-echo 66-enable 66-env 66-init 66-inresolve 66-inservice 66-instate 66-intree 66-parser 66-scanctl 66-scandir 66-start 66-stop 66-svctl 66-tree 66-update 66-boot 66-hpr 66-shutdown 66-shutdownd 66-umountall 66-update frontend instantiated-service module-service index execl-envfile'
 
 if [ ! -d doc/html ]; then
     mkdir -p -m 0755 doc/html || exit 1
diff --git a/doc/make-man.sh b/doc/make-man.sh
index d682574de48268aade9626da2d5443a6fce7e082..8d51a8e3953a8a4f63f723af036c1607105bd201 100755
--- a/doc/make-man.sh
+++ b/doc/make-man.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-man1='66-all 66-dbctl 66-disable 66-echo 66-enable 66-env 66-init 66-inresolve 66-inservice 66-instate 66-intree 66-parser 66-scanctl 66-scandir 66-start 66-stop 66-svctl 66-tree 66-update'
+man1='66-all 66-dbctl 66-disable 66-echo 66-enable 66-env 66-init 66-inresolve 66-inservice 66-instate 66-intree 66-parser 66-scanctl 66-scandir 66-start 66-stop 66-svctl 66-tree 66-update execl-envfile'
 
 man8='66-boot 66-hpr 66-shutdown 66-shutdownd 66-umountall'