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Properly deal with Defaults double-quoted strings that span multiple

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lines using the line continuation char.  Previously, the entire thing,
including the continuation char, newline, and spaces was stored as-is.
This commit is contained in:
Todd C. Miller 2007-08-20 23:19:44 +00:00
parent fa6536920b
commit 9cf8213c26
2 changed files with 2909 additions and 2787 deletions
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5621
toke.c
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75
toke.l
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@ -65,12 +65,15 @@ static int sawspace = 0;
static int arg_len = 0;
static int arg_size = 0;
static int fill __P((char *, int));
static int append __P((char *, int));
static int _fill __P((char *, int, int));
static int fill_cmnd __P((char *, int));
static int fill_args __P((char *, int, int));
static int switch_buffer __P((char *));
extern void yyerror __P((const char *));
#define fill(a, b) _fill(a, b, 0)
#define push_include(_p) (switch_buffer((_p)))
#define pop_include() (switch_buffer(NULL))
@ -92,7 +95,7 @@ IPV6ADDR \:\:|({HEXDIGIT}\:){7}{HEXDIGIT}|({HEXDIGIT}\:){5}{HEXDIGIT}\:{DOTTEDQ
HOSTNAME [[:alnum:]_-]+
WORD ([^#>!=:,\(\) \t\n\\]|\\[^\n])+
PATH \/(\\[\,:= \t#]|[^\,:=\\ \t\n#])+
ENVAR ([^#!=, \t\n\\]|\\[^\n])([^#=, \t\n\\]|\\[^\n])*
ENVAR ([^#!=, \t\n\\\"]|\\[^\n])([^#=, \t\n\\\"]|\\[^\n])*
DEFVAR [a-z_]+
%option nounput
@ -104,6 +107,7 @@ DEFVAR [a-z_]+
%x GOTCMND
%x STARTDEFS
%x INDEFS
%x INSTR
%%
<GOTDEFS>[[:blank:]]+ BEGIN STARTDEFS;
@ -138,11 +142,10 @@ DEFVAR [a-z_]+
return('-');
} /* return '-' */
\"([^\"]|\\\")+\" {
LEXTRACE("WORD(1) ");
if (!fill(yytext + 1, yyleng - 2))
yyterminate();
return(WORD);
\" {
LEXTRACE("BEGINSTR ");
yylval.string = NULL;
BEGIN INSTR;
}
{ENVAR} {
@ -153,6 +156,30 @@ DEFVAR [a-z_]+
}
}
<INSTR>{
\\\n[[:blank:]]* {
/* Line continuation char followed by newline. */
++sudolineno;
LEXTRACE("\n");
}
\" {
LEXTRACE("ENDSTR ");
BEGIN INDEFS;
return(WORD);
}
([^\"\n]|\\\")+ {
LEXTRACE("STRBODY ");
/* Push back line continuation char if present */
if (yyleng > 2 && yytext[yyleng - 1] == '\\' &&
isspace((unsigned char)yytext[yyleng - 2]))
yyless(yyleng - 1);
if (!append(yytext, yyleng))
yyterminate();
}
}
<GOTCMND>{
\\[\*\?\[\]\!] {
/* quoted fnmatch glob char, pass verbatim */
@ -459,29 +486,45 @@ sudoedit {
%%
static int
fill(s, len)
char *s;
int len;
_fill(src, len, olen)
char *src;
int len, olen;
{
int i, j;
char *dst;
yylval.string = (char *) malloc(len + 1);
if (yylval.string == NULL) {
dst = olen ? realloc(yylval.string, olen + len + 1) : malloc(len + 1);
if (dst == NULL) {
yyerror("unable to allocate memory");
return(FALSE);
}
yylval.string = dst;
/* Copy the string and collapse any escaped characters. */
dst += olen;
for (i = 0, j = 0; i < len; i++, j++) {
if (s[i] == '\\' && i != len - 1)
yylval.string[j] = s[++i];
if (src[i] == '\\' && i != len - 1)
dst[j] = src[++i];
else
yylval.string[j] = s[i];
dst[j] = src[i];
}
yylval.string[j] = '\0';
dst[j] = '\0';
return(TRUE);
}
static int
append(src, len)
char *src;
int len;
{
int olen = 0;
if (yylval.string != NULL)
olen = strlen(yylval.string);
return(_fill(src, len, olen));
}
static int
fill_cmnd(s, len)
char *s;