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view libtommath/tombc/grammar.txt @ 1630:9579377b5f8b

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use strlcpy & strlcat (#74) * refactor checkpubkeyperms() with safe BSD functions fix gcc8 warnings ``` svr-authpubkey.c: In function 'checkpubkeyperms': svr-authpubkey.c:427:2: warning: 'strncat' specified bound 5 equals source length [-Wstringop-overflow=] strncat(filename, "/.ssh", 5); /* strlen("/.ssh") == 5 */ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ svr-authpubkey.c:433:2: warning: 'strncat' specified bound 16 equals source length [-Wstringop-overflow=] strncat(filename, "/authorized_keys", 16); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``` see https://www.sudo.ws/todd/papers/strlcpy.html * restore strlcpy in xstrdup see original https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/xmalloc.c?rev=1.16
author François Perrad <francois.perrad@gadz.org>
date Wed, 20 Mar 2019 15:09:19 +0100
parents eed26cff980b
children
line wrap: on
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program       := program statement | statement | empty
statement     := { statement }                                                                              | 
                 identifier = numexpression;                                                                | 
                 identifier[numexpression] = numexpression;                                                 |
                 function(expressionlist);                                                                  | 
                 for (identifer = numexpression; numexpression; identifier = numexpression) { statement }   |
                 while (numexpression) { statement }                                                        | 
                 if (numexpresion) { statement } elif                                                       | 
                 break;                                                                                     | 
                 continue;                                                                                  
                 
elif          := else statement | empty
function      := abs | countbits | exptmod | jacobi | print | isprime | nextprime | issquare | readinteger | exit
expressionlist := expressionlist, expression | expression

// LR(1) !!!?
expression    := string | numexpression
numexpression := cmpexpr && cmpexpr | cmpexpr \|\| cmpexpr | cmpexpr
cmpexpr       := boolexpr  < boolexpr | boolexpr  > boolexpr | boolexpr == boolexpr | 
                 boolexpr <= boolexpr | boolexpr >= boolexpr | boolexpr
boolexpr      := shiftexpr & shiftexpr | shiftexpr ^ shiftexpr | shiftexpr \| shiftexpr | shiftexpr
shiftexpr     := addsubexpr << addsubexpr | addsubexpr >> addsubexpr | addsubexpr
addsubexpr    := mulexpr + mulexpr | mulexpr - mulexpr | mulexpr
mulexpr       := expr * expr       | expr / expr | expr % expr | expr
expr          := -nexpr | nexpr 
nexpr         := integer | identifier | ( numexpression ) | identifier[numexpression] 

identifier    := identifer digits | identifier alpha | alpha
alpha         := a ... z | A ... Z
integer       := hexnumber | digits 
hexnumber     := 0xhexdigits
hexdigits     := hexdigits hexdigit | hexdigit
hexdigit      := 0 ... 9 | a ... f | A ... F
digits        := digits digit | digit 
digit         := 0 ... 9