ESH

Relicense to MIT

Diffstat

24 files changed, 40 insertions, 590 deletions

diff --git a/.gitignore b/.gitignore
index 5497595..f563e5a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 /.cache/
+/.vscode/
 /bin/
 /build/
 /compile_commands.json
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0a3762f..8a058a9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,9 +1,9 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.12)
-PROJECT(ESH VERSION 0.5.1 LANGUAGES C)
+cmake_minimum_required(VERSION 3.12)
+project(ESH VERSION 0.5.1 LANGUAGES C)
 
-SET(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/bin)
-ADD_COMPILE_DEFINITIONS(PROJECT_VERSION="${PROJECT_VERSION}")
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/bin)
+add_compile_definitions(PROJECT_VERSION="${PROJECT_VERSION}")
 
-FILE(GLOB SRC ${PROJECT_SOURCE_DIR}/src/*.c ${PROJECT_SOURCE_DIR}/src/**/*.c)
+file(GLOB SRC ${PROJECT_SOURCE_DIR}/src/*.c ${PROJECT_SOURCE_DIR}/src/**/*.c)
 
-ADD_EXECUTABLE(esh ${SRC})
+add_executable(esh ${SRC})
diff --git a/LICENCE b/LICENCE
index 5e4b579..c6e3a71 100644
--- a/LICENCE
+++ b/LICENCE
@@ -1,24 +1,20 @@
-OMKOV Permissive Licence, version 1.0
+MIT Licence
+
+Copyright (C) 2020, Jakob Wakeling
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
+this software and associated documentation files (the "Software"), to deal in
 the Software without restriction, including without limitation the rights to
 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 the Software, and to permit persons to whom the Software is furnished to do so,
 subject to the following conditions:
 
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
+FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES, OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT, OR OTHERWISE, ARISING FROM, OUT OF, OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/README.md b/README.md
index 786325a..8b77c14 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,5 @@
 # ESH
 
-> Executive Shell
-
 **ESH** is a modern shell with an emphasis on performance and usability. It is
 not indended to be POSIX compliant, but may still exhibit POSIX-like behaviour.
 
@@ -17,16 +15,11 @@ At present, **ESH** is unfinished and is missing a number of basic features.
 
 ### Building
 
-> To build **ESH** on UNIX, run `BuildUNIX.sh` or
-
-```sh
-cmake -S . -B build && cmake --build build
-```
+To build **ESH** on UNIX, run `BuildUNIX.sh`.
 
-Binaries will be located in the bin directory.
+- Binaries will be located in the bin directory.
 
 ## Meta
 
 Copyright (C) 2020, Jakob Wakeling
-All rights reserved.  
-[OMKOV Permissive Licence](https://www.omkov.net/OLPE)
+[MIT Licence](https://opensource.org/licenses/MIT)
diff --git a/src/alias.c b/src/alias.c
index a518672..0684808 100644
--- a/src/alias.c
+++ b/src/alias.c
@@ -1,34 +1,7 @@
 // alias.c
 // Alias source file for ESH
 // Copyright (C) 2020, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #include "alias.h"
 
diff --git a/src/alias.h b/src/alias.h
index c18eabe..f5ecd13 100644
--- a/src/alias.h
+++ b/src/alias.h
@@ -1,34 +1,7 @@
 // alias.h
 // Alias header file for ESH
 // Copyright (C) 2020, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #ifndef ESH_ALIAS_H_0BXOPDLM
 #define ESH_ALIAS_H_0BXOPDLM
diff --git a/src/bltn.c b/src/bltn.c
index 8ef57b3..bb7d74b 100644
--- a/src/bltn.c
+++ b/src/bltn.c
@@ -1,34 +1,7 @@
 // bltn.c
 // Builtin source file for ESH
 // Copyright (C) 2020, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #include "alias.h"
 #include "bltn.h"
diff --git a/src/bltn.h b/src/bltn.h
index d38f92a..d24834e 100644
--- a/src/bltn.h
+++ b/src/bltn.h
@@ -1,34 +1,7 @@
 // bltn.h
 // Builtin header file for ESH
 // Copyright (C) 2020, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #ifndef ESH_BLTN_H_XQ5D812A
 #define ESH_BLTN_H_XQ5D812A
diff --git a/src/bltns/cd.c b/src/bltns/cd.c
index 7a105fa..7553f21 100644
--- a/src/bltns/cd.c
+++ b/src/bltns/cd.c
@@ -1,34 +1,7 @@
 // cd.c
 // cd builtin source file for ESH
 // Copyright (C) 2020, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #include "../util/optget.h"
 
diff --git a/src/bltns/eval.c b/src/bltns/eval.c
index de8dd30..433e1af 100644
--- a/src/bltns/eval.c
+++ b/src/bltns/eval.c
@@ -1,34 +1,7 @@
 // eval.c
 // eval builtin source file for ESH
 // Copyright (C) 2020, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #include "../esh.h"
 #include "../util/alloc.h"
diff --git a/src/bltns/pwd.c b/src/bltns/pwd.c
index 72ccb55..b5f6305 100644
--- a/src/bltns/pwd.c
+++ b/src/bltns/pwd.c
@@ -1,34 +1,7 @@
 // pwd.c
 // pwd builtin source file for ESH
 // Copyright (C) 2020, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #include "../util/optget.h"
 
diff --git a/src/bltns/set.c b/src/bltns/set.c
index dca6da2..67ad870 100644
--- a/src/bltns/set.c
+++ b/src/bltns/set.c
@@ -1,34 +1,7 @@
 // set.c
 // set builtin source file for ESH
 // Copyright (C) 2020, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #include "../conf.h"
 #include "../util/error.h"
diff --git a/src/conf.c b/src/conf.c
index e6e70a8..a6d357d 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -1,34 +1,7 @@
 // conf.c
 // Conf source file for ESH
 // Copyright (C) 2020, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #include "conf.h"
 #include "esh.h"
diff --git a/src/conf.h b/src/conf.h
index 8bc805e..a23d800 100644
--- a/src/conf.h
+++ b/src/conf.h
@@ -1,34 +1,7 @@
 // conf.h
 // Conf header file for ESH
 // Copyright (C) 2020, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #ifndef ESH_CONF_H_SOQSQ8HL
 #define ESH_CONF_H_SOQSQ8HL
diff --git a/src/esh.h b/src/esh.h
index 34d2578..ee5ba02 100644
--- a/src/esh.h
+++ b/src/esh.h
@@ -1,34 +1,7 @@
 // esh.h
 // Common header file for ESH
 // Copyright (C) 2021, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #ifndef ESH_ESH_H_SAZDXXFN
 #define ESH_ESH_H_SAZDXXFN
diff --git a/src/eval.c b/src/eval.c
index 6bb8c8f..c4c6f58 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -1,34 +1,7 @@
 // eval.c
 // Evaluation source file for ESH
 // Copyright (C) 2020, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #include "esh.h"
 #include "util/alloc.h"
diff --git a/src/exec.c b/src/exec.c
index f211b7f..5919155 100644
--- a/src/exec.c
+++ b/src/exec.c
@@ -1,34 +1,7 @@
 // exec.c
 // Execution source file for ESH
 // Copyright (C) 2020, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #include "bltn.h"
 #include "esh.h"
diff --git a/src/lex.c b/src/lex.c
index 09f41a1..3ded837 100644
--- a/src/lex.c
+++ b/src/lex.c
@@ -1,34 +1,7 @@
 // lex.c
 // Lexer source file for ESH
 // Copyright (C) 2021, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #include "lex.h"
 #include "util/error.h"
diff --git a/src/lex.h b/src/lex.h
index f1f1d19..f6fcc69 100644
--- a/src/lex.h
+++ b/src/lex.h
@@ -1,34 +1,7 @@
 // lex.h
 // Lexer header file for ESH
 // Copyright (C) 2021, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #ifndef ESH_LEX_H_MCIXGGPK
 #define ESH_LEX_H_MCIXGGPK
diff --git a/src/lineread.c b/src/lineread.c
index 1ab27b9..0a8252b 100644
--- a/src/lineread.c
+++ b/src/lineread.c
@@ -1,34 +1,7 @@
 // lineread.c
 // Lineread source file for ESH
 // Copyright (C) 2021, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #include "conf.h"
 #include "lineread.h"
diff --git a/src/lineread.h b/src/lineread.h
index 9109830..4e1c896 100644
--- a/src/lineread.h
+++ b/src/lineread.h
@@ -1,34 +1,7 @@
 // lineread.h
 // Lineread header file for ESH
 // Copyright (C) 2021, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #ifndef ESH_LINEREAD_H_RPVXY3N7
 #define ESH_LINEREAD_H_RPVXY3N7
diff --git a/src/main.c b/src/main.c
index 7b0b456..4cf48bd 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,34 +1,7 @@
 // main.c
 // Main source file for ESH
 // Copyright (C) 2020, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 /*
 	FIXME command history is always inserted, even when modifying previous
diff --git a/src/parse.c b/src/parse.c
index d85766f..929751a 100644
--- a/src/parse.c
+++ b/src/parse.c
@@ -1,34 +1,7 @@
 // parse.c
 // Parser source file for ESH
 // Copyright (C) 2020, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #include "esh.h"
 #include "lex.h"
diff --git a/src/parse.h b/src/parse.h
index 501a8ac..0e6e5e9 100644
--- a/src/parse.h
+++ b/src/parse.h
@@ -1,34 +1,7 @@
 // parse.h
 // Parser header file for ESH
 // Copyright (C) 2021, Jakob Wakeling
-// All rights reserved.
-
-/*
-OMKOV Permissive Licence, version 1.0
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal with
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimers.
-* Redistributions in binary form must reproduce the above copyright notice, this
-  list of conditions and the following disclaimers in the documentation and/or
-  other materials provided with the distribution.
-* Neither the names of the copyright holders, nor the names of its contributors
-  may be used to endorse or promote products derived from this Software without
-  specific prior written permission.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
-HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
-*/
+// MIT Licence
 
 #ifndef ESH_PARSE_H_R9WJSU27
 #define ESH_PARSE_H_R9WJSU27