path: root/discover/grub2/grub2-lexer.l
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* Allow evaluation of arbitrarily-positioned arguments in GRUB2 parserAlan Dunn2016-04-261-1/+2
| | | | | | | | | | | | | | | GRUB2 allows essentially arbitrary numbers of positional arguments, so ensure that they can be evaluated within scripts. GRUB2 also appears to support arbitrary numbers of leading 0's in positional parameters (i.e., $01 should evalute the same as $1), but this doesn't seem like a particularly important case to support. Tested: Modified test-grub2-pos-param to cover higher-numbered positional arguments. Signed-off-by: Alan Dunn <> Signed-off-by: Samuel Mendoza-Jonas <>
* discover/grub: Fix handling of empty stringsSam Mendoza-Jonas2016-02-091-0/+7
| | | | | | | | | | | If "" or '' are used in a statement to omit a word, we must still return a TOKEN_WORD for an empty string. In particular this fixes an issue where Petitboot would fail to parse the grub.cfg included in the Debian 8.2 install image, which includes a menuentry statement with an empty name. Signed-off-by: Sam Mendoza-Jonas <>
* discover/grub2: improve handling of word & delimiter tokensJeremy Kerr2014-12-011-7/+14
| | | | | | | | | | | | | | | | | | | | | | | Currently, the delimiter token handling is a little fragile: we try to ignore non-inter-word delimiters in the lexer with a selective set of regexes on the possible delimiter characters. This means we don't need to handle potential delimiters in every grammar rule, but there are other situations (not regex-able) where we may see delimters, and this will cause a parse error. Instead of relying on the regex behaviour, we have an 'inter_word' flag, which is set when we see the first word token, and cleared when we see an end-of-line token. We only emit TOKEN_DELIM when this flag is set. This means that we only get the delim tokens when they're required - when we're looking for word separators (becuase WORD DELIM WORD is distinct from WORD WORD - eg "linux /vmlinux" and "x$var"). We add a few new tests for the "menuentry" and "if" syntax, with different delimiter configurations. Signed-off-by: Jeremy Kerr <>
* discover/grub2: fix incorrect prototype in yyerrorJeremy Kerr2014-12-011-1/+2
| | | | | | | Because we're using two parse-params, we need to add the scanner argument to yyerror. Signed-off-by: Jeremy Kerr <>
* discover/grub2: distinguish parser.h from grub2/parser.hJeremy Kerr2014-08-051-0/+145
'make distcheck' will do a 'make all' srcdir == objdir, then later a 'make check' sith srcdir != objdir. Since gcc's cpp always assumes that a source file's directory is first in the include paths, we may see discover/parser.h included when we wanted the generated discover/grub2/parser.h. This change renames the grub2 lexer and parser files, to work-around this behaviour, and fix 'make distcheck'. Signed-off-by: Jeremy Kerr <>
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