list disallowed characters in file paths or locations for draft-4

Author: mr-c

draft-4/Process.yml

@@ -82,6 +82,14 @@ $graph:
         If the `path` field is provided but the `location` field is not, an
         implementation may assign the value of the `path` field to `location`,
         then follow the rules above.
+
+        If the `location` contains [POSIX shell metacharacters](http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_02)
+        (`|`,`&`, `;`, `<`, `>`, `(`,`)`, `$`,`` ` ``, `\`, `"`, `'`,
+        `<space>`, `<tab>`, and `<newline>`) or characters
+        [not allowed](http://www.iana.org/assignments/idna-tables-6.3.0/idna-tables-6.3.0.xhtml)
+        for [Internationalized Domain Names for Applications](https://tools.ietf.org/html/rfc6452)
+        then implementations may terminate the process with a
+        `permanentFailure`.
       jsonldPredicate:
         _id: "@id"
         _type: "@id"
@@ -98,6 +106,14 @@ $graph:
         As a special case, if the `path` field is provided but the `location`
         field is not, an implementation may assign the value of the `path`
         field to `location`, and remove the `path` field.
+        
+        If the `path` contains [POSIX shell metacharacters](http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_02)
+        (`|`,`&`, `;`, `<`, `>`, `(`,`)`, `$`,`` ` ``, `\`, `"`, `'`,
+        `<space>`, `<tab>`, and `<newline>`) or characters
+        [not allowed](http://www.iana.org/assignments/idna-tables-6.3.0/idna-tables-6.3.0.xhtml)
+        for [Internationalized Domain Names for Applications](https://tools.ietf.org/html/rfc6452)
+        then implementations may terminate the process with a
+        `permanentFailure`.
       jsonldPredicate:
         "_id": "cwl:path"
         "_type": "@id"
@@ -239,6 +255,14 @@ $graph:
         If the `path` field is provided but the `location` field is not, an
         implementation may assign the value of the `path` field to `location`,
         then follow the rules above.
+        
+        If the `location` contains [POSIX shell metacharacters](http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_02)
+        (`|`,`&`, `;`, `<`, `>`, `(`,`)`, `$`,`` ` ``, `\`, `"`, `'`,
+        `<space>`, `<tab>`, and `<newline>`) or characters
+        [not allowed](http://www.iana.org/assignments/idna-tables-6.3.0/idna-tables-6.3.0.xhtml)
+        for [Internationalized Domain Names for Applications](https://tools.ietf.org/html/rfc6452)
+        then implementations may terminate the process with a
+        `permanentFailure`.
       jsonldPredicate:
         _id: "@id"
         _type: "@id"
@@ -250,6 +274,14 @@ $graph:
         must not be used in any other context.  The command line tool being
         executed must be able to to access the directory at `path` using the POSIX
         `opendir(2)` syscall.
+        
+        If the `path` contains [POSIX shell metacharacters](http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_02)
+        (`|`,`&`, `;`, `<`, `>`, `(`,`)`, `$`,`` ` ``, `\`, `"`, `'`,
+        `<space>`, `<tab>`, and `<newline>`) or characters
+        [not allowed](http://www.iana.org/assignments/idna-tables-6.3.0/idna-tables-6.3.0.xhtml)
+        for [Internationalized Domain Names for Applications](https://tools.ietf.org/html/rfc6452)
+        then implementations may terminate the process with a
+        `permanentFailure`.
       jsonldPredicate:
         _id: "cwl:path"
         _type: "@id"