Support password length command line argument when generating and writing passwords

README.md

@@ -8,9 +8,7 @@ Script to manage passwords in an encrypted file using gpg.
 
     git clone https://github.com/drduh/pwd.sh && cd pwd.sh
 
-Requires `gpg`
-
-Install with `brew install gpg` or `sudo apt-get install gnupg` or build and install it from [source](https://www.gnupg.org/download/index.html).
+Requires `gpg`. Install with `brew install gpg` or `sudo apt-get install gnupg` or build and install it from [source](https://www.gnupg.org/download/index.html).
 
 # Use
 
@@ -22,10 +20,14 @@ Type `r` to read a password(s).
 
 Type `d` to delete a password.
 
-Or, the action and username can be passed on the command line, e.g.,
+Options can also be passed on the command line, e.g.,
 
-`./pwd.sh r github` or `./pwd.sh w gmail`
+`./pwd.sh w gmail 30` to generate and write a password called 'gmail' with a length of 30 characters, or
 
-The encrypted file `pwd.sh.safe` and script can be safely shared between machines over public channels (Google Drive, Dropbox, etc).
+`./pwd.sh r github` to read the password called 'github', or
+
+`./pwd.sh d dropbox` to delete the password called 'dropbox'.
+
+The script and `pwd.sh.safe` encrypted file can be safely shared between machines over public channels (Google Drive, Dropbox, etc).
 
 A sample `gpg.conf` configuration file is provided for your consideration.

pwd.sh

@@ -95,8 +95,13 @@ gen_pass () {
 
   len=50
   max=100
-  read -p "
+
+  if [[ -z "${3+x}" ]] ; then
+    read -p "
   Password length? (default: ${len}, max: ${max}) " length
+  else
+    length="${3}"
+  fi
 
   if [[ ${length} =~ ^[0-9]+$ ]] ; then
     len=${length}
@@ -142,11 +147,15 @@ create_username () {
   if [[ -z "${2+x}" ]] ; then
       read -p "
   Username: " username
+  else
+      username="${2}"
+  fi
+
+  if [[ -z "${3+x}" ]] ; then
       read -p "
   Generate password? (y/n, default: y) " rand_pass
   else
       rand_pass=""
-      username="${2}"
   fi
 
   if [[ "${rand_pass}" =~ ^([nN][oO]|[nN])$ ]]; then
@@ -154,7 +163,7 @@ create_username () {
   Enter password for \"${username}\": " ; echo
     userpass=$password
   else
-    userpass=$(gen_pass)
+    userpass=$(gen_pass "$@")
     echo "
   Password: ${userpass}"
   fi