diff --git a/share/completions/apt-proxy-import.fish b/share/completions/apt-proxy-import.fish
index 65855b7..8e09457 100644
--- a/share/completions/apt-proxy-import.fish
+++ b/share/completions/apt-proxy-import.fish
@@ -4,7 +4,7 @@ complete -f -c apt-proxy-import -s V -l version -d (N_ 'Display version and exit
 complete -f -c apt-proxy-import -s v -l verbose -d (N_ 'Verbose mode')
 complete -f -c apt-proxy-import -s q -l quiet -d (N_ 'No message to STDOUT')
 complete -f -c apt-proxy-import -s r -l recursive -d (N_ 'Recurse into subdir')
-complete -r -c apt-proxy-import -s i -l import-dir -a '(ls -Fp|grep /\$)' -d (N_ 'Dir to import')
+complete -r -c apt-proxy-import -s i -l import-dir -a '(ls -Fp|sgrep /\$)' -d (N_ 'Dir to import')
 complete -r -c apt-proxy-import -s u -l user -a '(__fish_complete_users)' -d (N_ 'Change to user')
 complete -r -c apt-proxy-import -s d -l debug -d (N_ 'Debug level[default 0]')
 
diff --git a/share/completions/apt-show-source.fish b/share/completions/apt-show-source.fish
index 9a3fffd..0ab5c32 100644
--- a/share/completions/apt-show-source.fish
+++ b/share/completions/apt-show-source.fish
@@ -2,8 +2,8 @@
 complete -c apt-show-source -s h -l help -d (N_ 'Display help and exit')
 complete -r -c apt-show-source -l status-file -d (N_ 'Read package from file') -f
 complete -r -c apt-show-source -o stf -d (N_ 'Read package from file') -f
-complete -r -c apt-show-source -l list-dir -a '(ls -Fp .|grep /\$) /var/lib/apt/lists' -d (N_ 'Specify APT list dir')
-complete -r -c apt-show-source -o ld -a '(ls -Fp .|grep /\$) /var/lib/apt/lists' -d (N_ 'Specify APT list dir')
+complete -r -c apt-show-source -l list-dir -a '(ls -Fp .|sgrep /\$) /var/lib/apt/lists' -d (N_ 'Specify APT list dir')
+complete -r -c apt-show-source -o ld -a '(ls -Fp .|sgrep /\$) /var/lib/apt/lists' -d (N_ 'Specify APT list dir')
 complete -r -c apt-show-source -s p -l package -a '(apt-cache pkgnames)' -d (N_ 'List PKG info')
 complete -f -c apt-show-source -l version-only -d (N_ 'Display version and exit')
 complete -f -c apt-show-source -s a -l all -d (N_ 'Print all source packages with version')
diff --git a/share/completions/apt-show-versions.fish b/share/completions/apt-show-versions.fish
index 1f3ca69..4c68728 100644
--- a/share/completions/apt-show-versions.fish
+++ b/share/completions/apt-show-versions.fish
@@ -9,6 +9,6 @@ complete -f -c apt-show-versions -s v -l verbose -d (N_ 'Print verbose info')
 complete -f -c apt-show-versions -s i -l initialize -d (N_ 'Init or update cache only')
 complete -r -c apt-show-versions -l status-file -d (N_ 'Read package from file')
 complete -r -c apt-show-versions -o stf -d (N_ 'Read package from file')
-complete -r -c apt-show-versions -l list-dir -a '(ls -Fp .|grep /\$) /var/lib/apt/lists /var/state/apt/lists' -d (N_ 'Specify APT list dir')
-complete -r -c apt-show-versions -o ld -a '(ls -Fp .|grep /\$) /var/lib/apt/lists /var/state/apt/lists' -d (N_ 'Specify APT list dir')
+complete -r -c apt-show-versions -l list-dir -a '(ls -Fp .|sgrep /\$) /var/lib/apt/lists /var/state/apt/lists' -d (N_ 'Specify APT list dir')
+complete -r -c apt-show-versions -o ld -a '(ls -Fp .|sgrep /\$) /var/lib/apt/lists /var/state/apt/lists' -d (N_ 'Specify APT list dir')
 
diff --git a/share/completions/chown.fish b/share/completions/chown.fish
index 8dbead2..29c22ef 100644
--- a/share/completions/chown.fish
+++ b/share/completions/chown.fish
@@ -9,4 +9,4 @@ complete -c chown -s v -l verbose -d (N_ "Output diagnostic for every file")
 complete -c chown -s h -l help -d (N_ "Display help and exit")
 complete -c chown -l version -d (N_ "Display version and exit")
 complete -c chown -d (N_ "Username") -a "(__fish_print_users):"
-complete -c chown -d (N_ "Username") -a "(echo (commandline -ct)|grep -o '.*:')(cat /etc/group |cut -d : -f 1)"
+complete -c chown -d (N_ "Username") -a "(echo (commandline -ct)|sgrep -o '.*:')(cat /etc/group |cut -d : -f 1)"
diff --git a/share/completions/fusermount.fish b/share/completions/fusermount.fish
index 13d34c2..45ae892 100644
--- a/share/completions/fusermount.fish
+++ b/share/completions/fusermount.fish
@@ -5,8 +5,8 @@
 #
 complete -c fusermount -d (N_ "Mount point") -x -a '
 (
-	cat /etc/mtab | grep "^sshfs" | cut -d " " -f 1-2|tr " " \n|sed -e "s/[0-9\.]*:\//\//"|grep "^/"
-	cat /etc/mtab | grep "^fuseiso" | cut -d " " -f 1-2|tr " " \n|sed -e "s/[0-9\.]*:\//\//"|grep "^/"
+	cat /etc/mtab | sgrep "^sshfs" | cut -d " " -f 1-2|tr " " \n|sed -e "s/[0-9\.]*:\//\//"|sgrep "^/"
+	cat /etc/mtab | sgrep "^fuseiso" | cut -d " " -f 1-2|tr " " \n|sed -e "s/[0-9\.]*:\//\//"|sgrep "^/"
 )
 '
 
diff --git a/share/completions/gpg.fish b/share/completions/gpg.fish
index 41d48e9..903fa44 100644
--- a/share/completions/gpg.fish
+++ b/share/completions/gpg.fish
@@ -37,7 +37,7 @@ function __fish_print_gpg_algo -d "Complete using all algorithms of the type spe
 	# expire when the function goes out of scope, and the original locale
 	# will take effect again.
 	set -lx LC_ALL C
-	gpg --version | grep "$argv:"| grep -v "Home:"|cut -d : -f 2 |tr , \n|tr -d " "
+	gpg --version | sgrep "$argv:"| sgrep -v "Home:"|cut -d : -f 2 |tr , \n|tr -d " "
 end
 
 
diff --git a/share/completions/kill.fish b/share/completions/kill.fish
index 232f99e..94a8a77 100644
--- a/share/completions/kill.fish
+++ b/share/completions/kill.fish
@@ -7,7 +7,7 @@ if kill -L ^/dev/null >/dev/null
 
 	complete -c kill -s L -d "List codes and names of available signals"
 
-	set -- signals (kill -L | sed -e 's/\([0-9][0-9]*\)  *\([A-Z,0-9][A-Z,0-9]*\)/\1 \2\n/g;s/ +/ /g' | sed -e 's/^ //' | grep -E '^[^ ]+')
+	set -- signals (kill -L | sed -e 's/\([0-9][0-9]*\)  *\([A-Z,0-9][A-Z,0-9]*\)/\1 \2\n/g;s/ +/ /g' | sed -e 's/^ //' | sgrep -E '^[^ ]+')
 	for i in $signals
 		set -- number (echo $i | cut -d " " -f 1)
 		set -- name (echo $i | cut -d " " -f 2)
@@ -24,7 +24,7 @@ else
 
 	complete -c kill -s l -d "List codes and names of available signals"
 
-	for i in (kill -l|tr \ \t \n|grep '^[A-Z][A-Z0-9]*$')
+	for i in (kill -l|tr \ \t \n|sgrep '^[A-Z][A-Z0-9]*$')
 		complete -c kill -o $i -d Send\ $i\ signal
 		complete -c kill -o s -x -a $i\tSend\ $i\ signal -d "Send specified signal"
 	end
diff --git a/share/completions/make.fish b/share/completions/make.fish
index 832524c..93da6b2 100644
--- a/share/completions/make.fish
+++ b/share/completions/make.fish
@@ -2,7 +2,7 @@
 
 function __fish_print_make_targets
 	set files Makefile makefile GNUmakefile
-	grep -h -E '^[^#%=$[:space:]][^#%=$]*:([^=]|$)' $files | cut -d ":" -f 1 | sed -e 's/^ *//;s/ *$//;s/  */\n/g' ^/dev/null
+	sgrep -h -E '^[^#%=$[:space:]][^#%=$]*:([^=]|$)' $files | cut -d ":" -f 1 | sed -e 's/^ *//;s/ *$//;s/  */\n/g' ^/dev/null
 end
 
 # This completion is a bit ugly.  It reenables file completion on
@@ -10,7 +10,7 @@ end
 # filename completion.  Unfortunatly, this turns out to be a bit
 # complicated to do.
 
-set -l is_assignment "commandline -ct|grep '..*='" 
+set -l is_assignment "commandline -ct|sgrep '..*='" 
 set -l complete_file_assignment '(commandline -ct)(complete --do-complete=this_command_does_not_exist\ (commandline -ct|sed -e \'s/.*=//\'))'
 complete -c make --condition $is_assignment -a $complete_file_assignment
 
diff --git a/share/completions/mount.fish b/share/completions/mount.fish
index 35a9996..0296063 100644
--- a/share/completions/mount.fish
+++ b/share/completions/mount.fish
@@ -4,7 +4,7 @@
 # including mount and df
 
 # Completions for mount
-complete -x -c mount -a '(cat /etc/fstab|sed -e "s/^\([^ \t]*\)[ \t]*\([^ \t]*\).*/\1\n\2/"|grep "^/")' -d (N_ 'Mount point')
+complete -x -c mount -a '(cat /etc/fstab|sed -e "s/^\([^ \t]*\)[ \t]*\([^ \t]*\).*/\1\n\2/"|sgrep "^/")' -d (N_ 'Mount point')
 complete -c mount -s V -d (N_ 'Display version and exit')
 complete -c mount -s h -d (N_ 'Display help and exit')
 complete -c mount -s v -d (N_ 'Verbose mode')
diff --git a/share/completions/mplayer.fish b/share/completions/mplayer.fish
index c2fbf25..e6588ed 100644
--- a/share/completions/mplayer.fish
+++ b/share/completions/mplayer.fish
@@ -57,25 +57,25 @@ complete -c mplayer -o utf8 -d (N_ "Handle subtitlefile as utf8")
 
 complete -c mplayer -o vo -x -d (N_ "Video output") -a "
 (
-	mplayer -vo help|grep \t.\*\t'\|^ *[a-zA-Z0-9][a-zA-Z0-9]*  '|sed -e 's/[\t ]*\([a-zA-Z0-9]*\)[\t ]*\(.*\)/\1'\t'\2/'
+	mplayer -vo help|sgrep \t.\*\t'\|^ *[a-zA-Z0-9][a-zA-Z0-9]*  '|sed -e 's/[\t ]*\([a-zA-Z0-9]*\)[\t ]*\(.*\)/\1'\t'\2/'
 )
 "
 
 complete -c mplayer -o ao -x -d (N_ "Audio output") -a "
 (
-	mplayer -ao help|grep \t.\*\t'\|^ *[a-zA-Z0-9][a-zA-Z0-9]*  '|sed -e 's/[\t ]*\([a-zA-Z0-9]*\)[\t ]*\(.*\)/\1'\t'\2/'
+	mplayer -ao help|sgrep \t.\*\t'\|^ *[a-zA-Z0-9][a-zA-Z0-9]*  '|sed -e 's/[\t ]*\([a-zA-Z0-9]*\)[\t ]*\(.*\)/\1'\t'\2/'
 )
 "
 
 complete -c mplayer -o afm -x -d (N_ "Audio output") -a "
 (
-	__fish_append ',' (mplayer -afm help|grep \t.\*\t'\|^ *[a-zA-Z0-9][a-zA-Z0-9]*  '|sed -e 's/[\t ]*\([a-zA-Z0-9]*\)[\t ]*\(.*\)/\1'\t'\2/')
+	__fish_append ',' (mplayer -afm help|sgrep \t.\*\t'\|^ *[a-zA-Z0-9][a-zA-Z0-9]*  '|sed -e 's/[\t ]*\([a-zA-Z0-9]*\)[\t ]*\(.*\)/\1'\t'\2/')
 )
 "
 
 complete -c mplayer -o vfm -x -d (N_ "Video output") -a "
 (
-	__fish_append ',' (mplayer -vfm help|grep \t.\*\t'\|^ *[a-zA-Z0-9][a-zA-Z0-9]*  '|sed -e 's/[\t ]*\([a-zA-Z0-9]*\)[\t ]*\(.*\)/\1'\t'\2/')
+	__fish_append ',' (mplayer -vfm help|sgrep \t.\*\t'\|^ *[a-zA-Z0-9][a-zA-Z0-9]*  '|sed -e 's/[\t ]*\([a-zA-Z0-9]*\)[\t ]*\(.*\)/\1'\t'\2/')
 )
 "
 
diff --git a/share/completions/screen.fish b/share/completions/screen.fish
index 32c28a0..bd0525d 100644
--- a/share/completions/screen.fish
+++ b/share/completions/screen.fish
@@ -1,5 +1,5 @@
 function __fish_complete_screen -d (N_ "Print a list of running screen sessions")
-	screen -list |grep \^\t.\*\(.\*\)|sed -e 's/\t\(.*\)\t(\(.*\))/\1'\t'Screen: \2/'
+	screen -list |sgrep \^\t.\*\(.\*\)|sed -e 's/\t\(.*\)\t(\(.*\))/\1'\t'Screen: \2/'
 end
 
 complete -c screen -x
diff --git a/share/completions/ssh.fish b/share/completions/ssh.fish
index 711e0cb..57250e9 100644
--- a/share/completions/ssh.fish
+++ b/share/completions/ssh.fish
@@ -20,7 +20,7 @@ complete -c ssh -s a -d (N_ "Disables forwarding of the authentication agent")
 complete -c ssh -s A -d (N_ "Enables forwarding of the authentication agent")
 complete -x -c ssh -s b -d (N_ "Interface to transmit from") -a "
 (
-	cat /proc/net/arp ^/dev/null| grep -v '^IP'|cut -d ' ' -f 1 ^/dev/null
+	cat /proc/net/arp ^/dev/null| sgrep -v '^IP'|cut -d ' ' -f 1 ^/dev/null
 )
 "
 
diff --git a/share/completions/umount.fish b/share/completions/umount.fish
index 03205f5..339bef1 100644
--- a/share/completions/umount.fish
+++ b/share/completions/umount.fish
@@ -5,7 +5,7 @@
 #
 # Find all mountpoints
 #
-complete -c umount -d (N_ "Mount point") -x -a '(cat /etc/mtab | cut -d " " -f 1-2|tr " " \n|sed -e "s/[0-9\.]*:\//\//"|grep "^/")'
+complete -c umount -d (N_ "Mount point") -x -a '(cat /etc/mtab | cut -d " " -f 1-2|tr " " \n|sed -e "s/[0-9\.]*:\//\//"|sgrep "^/")'
 
 complete -c umount -s V -d (N_ "Display version and exit")
 complete -c umount -s h -d (N_ "Display help and exit")
diff --git a/share/completions/valgrind.fish b/share/completions/valgrind.fish
index a94b05e..6e7b575 100644
--- a/share/completions/valgrind.fish
+++ b/share/completions/valgrind.fish
@@ -1,5 +1,5 @@
 
-if valgrind --version | grep -- '-2\.[012]\.' >/dev/null ^/dev/null
+if valgrind --version | sgrep -- '-2\.[012]\.' >/dev/null ^/dev/null
 	# In older versions of Valgrind, the skin selection option was
     # '--skin'
 	set -g skin skin
diff --git a/share/config.fish.in b/share/config.fish.in
index 0857c42..e0ec5c3 100644
--- a/share/config.fish.in
+++ b/share/config.fish.in
@@ -76,7 +76,7 @@ end
 set -l tmp (printf "%s" \^$PATH'/?$|')
 set -l path_regexp \((echo $tmp | sed -e "s/.\$//")\)
 
-for i in (printf "%s\n" $path_list|grep -E -v $path_regexp)
+for i in (printf "%s\n" $path_list|sgrep -E -v $path_regexp)
 	if test -d $i
 		set PATH $PATH $i
 	end
diff --git a/share/config_interactive.fish.in b/share/config_interactive.fish.in
index 83fee3c..74da5b8 100644
--- a/share/config_interactive.fish.in
+++ b/share/config_interactive.fish.in
@@ -197,7 +197,7 @@ function __fish_print_interfaces -d "Print a list of known network interfaces"
 end
 
 function __fish_print_addresses -d "Print a list of known network addresses"
-	/sbin/ifconfig |grep 'inet addr'|cut -d : -f 2|cut -d ' ' -f 1
+	/sbin/ifconfig |sgrep 'inet addr'|cut -d : -f 2|cut -d ' ' -f 1
 end
 
 function __fish_print_users -d "Print a list of local users"
@@ -208,7 +208,7 @@ end
 # Completions for the shell and it's builtin commands and functions
 #
 
-for i in (builtin -n|grep -E -v '(while|for|if|function|switch)' )
+for i in (builtin -n|sgrep -E -v '(while|for|if|function|switch)' )
 	complete -c $i -s h -l help -d "Display help and exit"
 end
 
diff --git a/share/functions/__fish_complete_cd.fish b/share/functions/__fish_complete_cd.fish
index f498f2a..a43bac6 100644
--- a/share/functions/__fish_complete_cd.fish
+++ b/share/functions/__fish_complete_cd.fish
@@ -18,7 +18,7 @@ function __fish_complete_cd -d "Completions for the cd command"
 	end
 
 	
-	if echo (commandline -ct)|grep '^/\|^\./\|^\.\./' >/dev/null
+	if echo (commandline -ct)|sgrep '^/\|^\./\|^\.\./' >/dev/null
 		# This is an absolute search path
 		eval printf '\%s\\tDirectory\\n' (commandline -ct)\*/
 	else
diff --git a/share/functions/__fish_complete_man.fish b/share/functions/__fish_complete_man.fish
index 7eb69f0..dad6ed0 100644
--- a/share/functions/__fish_complete_man.fish
+++ b/share/functions/__fish_complete_man.fish
@@ -21,7 +21,7 @@ function __fish_complete_man
 		set section $section"[^)]*"
 
 		# Do the actual search
-		apropos (commandline -ct) | grep \^(commandline -ct) | sed -n -e 's/\([^ ]*\).*(\('$section'\)) *- */\1'\t'\2: /p'
+		apropos (commandline -ct) | sgrep \^(commandline -ct) | sed -n -e 's/\([^ ]*\).*(\('$section'\)) *- */\1'\t'\2: /p'
 	end
 end
 
diff --git a/share/functions/__fish_contains_opt.fish b/share/functions/__fish_contains_opt.fish
index 5b06007..ec7eb67 100644
--- a/share/functions/__fish_contains_opt.fish
+++ b/share/functions/__fish_contains_opt.fish
@@ -29,11 +29,11 @@ function __fish_contains_opt -d "Checks if a specific option has been given in t
 			continue
 		end
 
-		if commandline -cpo | grep -- "^-"$i"\|^-[^-]*"$i >/dev/null
+		if commandline -cpo | sgrep -- "^-"$i"\|^-[^-]*"$i >/dev/null
 			return 0
 		end
 		
-		if commandline -ct | grep -- "^-"$i"\|^-[^-]*"$i >/dev/null
+		if commandline -ct | sgrep -- "^-"$i"\|^-[^-]*"$i >/dev/null
 			return 0
 		end
 	end
diff --git a/share/functions/__fish_print_hostnames.fish b/share/functions/__fish_print_hostnames.fish
index f6de978..69e41e0 100644
--- a/share/functions/__fish_print_hostnames.fish
+++ b/share/functions/__fish_print_hostnames.fish
@@ -3,11 +3,11 @@ function __fish_print_hostnames -d "Print a list of known hostnames"
 
 	# Print all hosts from /etc/hosts
 	if test -f /etc/hosts
-		sed </etc/hosts -e 's/[0-9.]*\( \|\t\)*\(.*\)/\2/'|sed -e 's/\#.*//'|tr \t \n |grep -v '^$'
+		sed </etc/hosts -e 's/[0-9.]*\( \|\t\)*\(.*\)/\2/'|sed -e 's/\#.*//'|tr \t \n |sgrep -v '^$'
 	end
 	# Print nfs servers from /etc/fstab
 	if test -f /etc/fstab
-		grep </etc/fstab "^\([0-9]*\.[0-9]*\.[0-9]*\.[0-9]*\|[a-zA-Z.]*\):"|cut -d : -f 1
+		sgrep </etc/fstab "^\([0-9]*\.[0-9]*\.[0-9]*\.[0-9]*\|[a-zA-Z.]*\):"|cut -d : -f 1
 	end
 
 	# Print hosts with known ssh keys
diff --git a/share/functions/__fish_print_packages.fish b/share/functions/__fish_print_packages.fish
index 77a7da2..47f65dd 100644
--- a/share/functions/__fish_print_packages.fish
+++ b/share/functions/__fish_print_packages.fish
@@ -18,7 +18,7 @@ function __fish_print_packages
 		# 2) Remove package names that are .so files, since these seem to not correspond to actual packages as reported by rpm
 		# 3) Remove path information such as /usr/bin/, as rpm packages do not have paths
 
-		apt-cache --no-generate pkgnames (commandline -tc)|grep -v \( |grep -v '\.so\(\.[0-9]\)*$'|sed -e 's/\/.*\///'|sed -e 's/$/'\t$package'/'
+		apt-cache --no-generate pkgnames (commandline -tc)|sgrep -v \( |sgrep -v '\.so\(\.[0-9]\)*$'|sed -e 's/\/.*\///'|sed -e 's/$/'\t$package'/'
 		return
 	end
 
@@ -47,7 +47,7 @@ function __fish_print_packages
 	# True for installing new packages. Function for printing 
 	# installed on the system packages is in completions/emerge.fish
 	if type -f emerge >/dev/null
-		emerge -s \^(commandline -tc) |grep "^*" |cut -d\  -f3 |cut -d/ -f2
+		emerge -s \^(commandline -tc) |sgrep "^*" |cut -d\  -f3 |cut -d/ -f2
 		return
 	end
 
diff --git a/share/functions/contains.fish b/share/functions/contains.fish
index 72edc9e..10dee39 100644
--- a/share/functions/contains.fish
+++ b/share/functions/contains.fish
@@ -32,14 +32,11 @@ function contains -d (N_ "Test if a key is contained in a set of values")
 	set -- key $argv[1]
 	set -e argv[1]	
 
-	# Don't use any grep options!
-	set -l GREP_OPTIONS
-
 	#
 	# Loop through values
 	#
 
-	printf "%s\n" $argv|grep -Fx -- $key >/dev/null
+	printf "%s\n" $argv|sgrep -Fx -- $key >/dev/null
 	return $status
 end
 
diff --git a/share/functions/sgrep.fish b/share/functions/sgrep.fish
new file mode 100644
index 0000000..c351578
--- /dev/null
+++ b/share/functions/sgrep.fish
@@ -0,0 +1,5 @@
+
+function sgrep -d "Call grep without honoring GREP_OPTIONS settings"
+	set -l GREP_OPTIONS
+	grep $argv
+end
\ No newline at end of file
diff --git a/share/functions/trap.fish b/share/functions/trap.fish
index 27af0f4..5cd91e2 100644
--- a/share/functions/trap.fish
+++ b/share/functions/trap.fish
@@ -113,7 +113,7 @@ function trap -d 'Perform an action when the shell recives a signal'
 			if count $opt >/dev/null
 				set -- names $opt
 			else
-				set -- names (functions -na|grep "^__trap_handler_"|sed -e 's/__trap_handler_//' )
+				set -- names (functions -na|sgrep "^__trap_handler_"|sed -e 's/__trap_handler_//' )
 			end
 
 			for i in $names
diff --git a/share/functions/umask.fish b/share/functions/umask.fish
index 78ab008..45f192f 100644
--- a/share/functions/umask.fish
+++ b/share/functions/umask.fish
@@ -1,12 +1,12 @@
 
 function __fish_umask_parse -d "Internal umask function"
 	# Test if already a valid octal mask, and pad it with zeros
-	if echo $argv | grep -E '^(0|)[0-7]{1,3}$' >/dev/null
+	if echo $argv | sgrep -E '^(0|)[0-7]{1,3}$' >/dev/null
 		for i in (seq (echo 5-(echo $argv|wc -c)|bc)); set argv 0$argv; end
 		echo $argv 
 	else
 		# Test if argument really is a valid symbolic mask
-		if not echo $argv | grep -E '^(((u|g|o|a|)(=|\+|-)|)(r|w|x)*)(,(((u|g|o|a|)(=|\+|-)|)(r|w|x)*))*$' >/dev/null
+		if not echo $argv | sgrep -E '^(((u|g|o|a|)(=|\+|-)|)(r|w|x)*)(,(((u|g|o|a|)(=|\+|-)|)(r|w|x)*))*$' >/dev/null
 			printf (_ "%s: Invalid mask '%s'\n") umask $argv >&2
 			return 1
 		end
@@ -70,19 +70,19 @@ function __fish_umask_parse -d "Internal umask function"
 					set mode set
 			end
 
-			if not echo $perm|grep -E '^(r|w|x)*$' >/dev/null
+			if not echo $perm|sgrep -E '^(r|w|x)*$' >/dev/null
 				printf (_ "%s: Invalid mask '%s'\n") umask $argv >&2
 				return
 			end
 
 			set val 0
-			if echo $i |grep 'r' >/dev/null
+			if echo $i |sgrep 'r' >/dev/null
 				set val 4
 			end
-			if echo $i |grep 'w' >/dev/null
+			if echo $i |sgrep 'w' >/dev/null
 				set val (echo $val + 2|bc)
 			end
-			if echo $i |grep 'x' >/dev/null
+			if echo $i |sgrep 'x' >/dev/null
 				set val (echo $val + 1|bc)
 			end