replace getent with grep #477

CHANGELOG.md

@@ -15,10 +15,12 @@ Project website: https://github.com/mviereck/x11docker
    [(464)](https://github.com/mviereck/x11docker/issues/464)
  - `--xonly`: run socat unprivileged to make the unix socket accessible.
    [(466)](https://github.com/mviereck/x11docker/issues/466)
-- `--share`: Softlink fix for folders in `HOME`.
+ - `--share`: Softlink fix for folders in `HOME`.
    [(475)](https://github.com/mviereck/x11docker/issues/475)
-- `jq` support to lessen python dependency.
+ - `jq` support to lessen python dependency.
    [(478)](https://github.com/mviereck/x11docker/issues/478)
+ - Replace `getent` with custom `grep` command.
+   [(477)](https://github.com/mviereck/x11docker/issues/477)
 ### Deprecated
  - `--backend=proot`: Deprecated because likely no one uses it,
    but would need further checks and maintenance.

x11docker

@@ -11,7 +11,7 @@
 # Run 'x11docker --help' or scroll down to read usage information.
 # More documentation at:  https://github.com/mviereck/x11docker
 
-Version="7.5.0-beta-4"
+Version="7.5.0-beta-5"
 Packagedversion="no" # Set to "yes" if you want to package x11docker. This disables installation options.
 
 # --enforce-i: Enforce running in interactive mode to allow commands tty and weston-launch in special setups. (deprecated)
@@ -1015,6 +1015,9 @@ isnum() {                       # check if $1 is a number
 makecookie() {                  # bake a cookie
   mcookie 2>/dev/null || echo $RANDOM$RANDOM$RANDOM$RANDOM$RANDOM$RANDOM | cut -b1-32
 }
+mygetent() {
+  grep "^${2:-NOENTRY}:" < "/etc/${1:-NOFILESPECIFIED}"
+}
 mysleep() {                     # catch cases where sleep only supports integer
   sleep "${1:-1}" 2>/dev/null || sleep 1
 }
@@ -4360,8 +4363,8 @@ create_xcontainercommand() {    # option --xc: create docker command for X in co
   echo "$Containeruser:x:${Containeruseruid:-$Hostuseruid}:${Containerusergid:-$Hostusergid}:$Containeruser,,,:/tmp:/bin/bash" >> "$Cachefolder/etcpasswd.xcontainer"
 
   mkfile "$Cachefolder/etcgroup.xcontainer"
-  echo "video:x:$(getent group video   | cut -d: -f3):$Containeruser" >> "$Cachefolder/etcgroup.xcontainer"
-  echo "render:x:$(getent group render | cut -d: -f3):$Containeruser" >> "$Cachefolder/etcgroup.xcontainer"
+  echo "video:x:$(mygetent group video   | cut -d: -f3):$Containeruser" >> "$Cachefolder/etcgroup.xcontainer"
+  echo "render:x:$(mygetent group render | cut -d: -f3):$Containeruser" >> "$Cachefolder/etcgroup.xcontainer"
   echo "weston-launch:x:104:$Containeruser"                           >> "$Cachefolder/etcgroup.xcontainer"
 
   ## code snippets:
@@ -4457,10 +4460,10 @@ create_xcontainercommand() {    # option --xc: create docker command for X in co
   }
   case "$Xcontainerbackend" in
     docker|podman)
-      getent group video >/dev/null && Xc_gpu="$Xc_gpu \\
-  --group-add $(getent group video  | cut -d: -f3)"
-      getent group render >/dev/null && Xc_gpu="$Xc_gpu \\
-  --group-add $(getent group render | cut -d: -f3)"
+      mygetent group video >/dev/null && Xc_gpu="$Xc_gpu \\
+  --group-add $(mygetent group video  | cut -d: -f3)"
+      mygetent group render >/dev/null && Xc_gpu="$Xc_gpu \\
+  --group-add $(mygetent group render | cut -d: -f3)"
     ;;
   esac
 
@@ -5960,12 +5963,12 @@ check_containeruser() {         # check container user (also option --user)
     Containeruser="$(echo "$Containeruser" | cut -d: -f1)"
   }
   [ "$Containeruser" = "root" ] && Containeruser="0"
-  [ -n "$(getent passwd "$Containeruser")" ] && {                      # user exists on host
-    Containeruser=$(getent passwd "$Containeruser" | cut -d: -f1)      # can be name or uid -> now name
-    Containeruseruid=$(getent passwd "$Containeruser" | cut -d: -f3)
-    [ -z "$Containerusergid" ] && Containerusergid="$(getent passwd "$Containeruser" | cut -d: -f4)"
+  [ -n "$(mygetent passwd "$Containeruser")" ] && {                      # user exists on host
+    Containeruser=$(mygetent passwd "$Containeruser" | cut -d: -f1)      # can be name or uid -> now name
+    Containeruseruid=$(mygetent passwd "$Containeruser" | cut -d: -f3)
+    [ -z "$Containerusergid" ] && Containerusergid="$(mygetent passwd "$Containeruser" | cut -d: -f4)"
     [ "$Containeruser" = "$Hostuser" ] && Containeruserhosthome="$Hostuserhome"
-    [ -z "$Containeruserhosthome" ]    && Containeruserhosthome="$(getent passwd "$Containeruser" | cut -d: -f6)"
+    [ -z "$Containeruserhosthome" ]    && Containeruserhosthome="$(mygetent passwd "$Containeruser" | cut -d: -f6)"
     :
   } || {                                                   # user does not exist on host
     [[ "$Containeruser" =~ ^[0-9]+$ ]] || error "Option --user: Unknown host user or invalid user number '$Containeruser'.
@@ -5976,7 +5979,7 @@ check_containeruser() {         # check container user (also option --user)
     Containeruserhosthome=""
   }
 
-  Containerusergroup="$(getent group "$Containerusergid" | cut -d: -f1 || echo group_"$Containeruser")"
+  Containerusergroup="$(mygetent group "$Containerusergid" | cut -d: -f1 || echo group_"$Containeruser")"
   [ "$Containeruseruid" = "0" ] && {
     Containeruser="root"
     Containerusergid="0"
@@ -6162,8 +6165,8 @@ create_backendcommand() {       ### create command to run docker|podman|nerdctl
     case "$Backend" in
       docker|podman)
         for Line in $Containerusergroups; do
-          getent group "${Line:-nonsense}" >/dev/null && Backendcommand="$Backendcommand \\
-  --group-add $(getent group "$Line" | cut -d: -f3)"
+          mygetent group "${Line:-nonsense}" >/dev/null && Backendcommand="$Backendcommand \\
+  --group-add $(mygetent group "$Line" | cut -d: -f3)"
         done
       ;;
     esac
@@ -8794,7 +8797,7 @@ check_hostuser() {              # check for unprivileged host user
     [ "$Startuser" = "root" ] || error "Option --hostuser: x11docker must run as root
    to choose a host user different from user '$Startuser'."
   }
-  getent passwd "$Hostuser" >/dev/null 2>&1 || {
+  mygetent passwd "$Hostuser" >/dev/null 2>&1 || {
     [ -f /etc/passwd ] || warning "Your system misses /etc/passwd"
     error "Could not find user '$Hostuser' in /etc/passwd."
   }
@@ -8810,7 +8813,7 @@ check_hostuser() {              # check for unprivileged host user
     *)            Unpriv="su $Hostuser -c" ;;
   esac
 
-  [ -z "$Hostuserhome" ] && Hostuserhome=$(getent passwd "$Hostuser" 2>/dev/null | cut -d: -f6)
+  [ -z "$Hostuserhome" ] && Hostuserhome=$(mygetent passwd "$Hostuser" 2>/dev/null | cut -d: -f6)
   [ -z "$Hostuserhome" ] && {
     Hostuserhome="/tmp/home/$Hostuser"
     mkfolder "$Hostuserhome"