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Code cleanups and sanity checking for config file parser.

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This commit is contained in:
Matthew N. Dodd 2003-04-10 01:44:19 +00:00
parent 74d66b34d7
commit 623b6bd2f9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=113312
1 changed files with 54 additions and 21 deletions
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75
libexec/rtld-elf/libmap.c
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@ -34,6 +34,9 @@ static char * lml_find (struct lm_list *, const char *);
static struct lm_list * lmp_find (const char *);
static struct lm_list * lmp_init (char *);
#define iseol(c) (((c) == '#') || ((c) == '\0') || \
((c) == '\n') || ((c) == '\r'))
void
lm_init (void)
{
@ -51,40 +54,70 @@ lm_init (void)
p = NULL;
while ((cp = fgets(line, MAXPATHLEN + 1, fp)) != NULL) {
t = f = NULL;
/* Skip over leading space */
while (!isalpha(*cp) &&
*cp != '#' && *cp != '\0' && *cp != '[') cp++;
while (isspace(*cp)) cp++;
/* Found a comment or EOL */
if (*cp == '#' || *cp == '\0')
continue;
/* Found a costraint selector */
if (iseol(*cp)) goto next;
/* Found a constraint selector */
if (*cp == '[') {
cp++;
/* Skip leading space */
while (isspace(*cp) &&
*cp != '#' && *cp != '\0' && *cp != ']') cp++;
while (isspace(*cp)) cp++;
/* Found comment, EOL or end of selector */
if (*cp == '#' || *cp == '\0' || *cp == ']')
continue;
if (iseol(*cp) || *cp == ']') goto next;
p = cp;
/* Skip to end of word */
while (!isspace(*cp) &&
*cp != '#' && *cp != '\0' && *cp != ']') cp++;
while (!isspace(*cp) && !iseol(*cp) && *cp != ']') cp++;
/* Skip and zero out trailing space */
while (isspace(*cp)) *cp++ = '\0';
/* Check if there is a closing brace */
if (*cp != ']') goto next;
/* Terminate string if there was no trailing space */
*cp++ = '\0';
bzero(prog, MAXPATHLEN);
strncpy(prog, p, strlen(p));
p = prog;
continue;
/*
* There should be nothing except whitespace or comment
* from this point to the end of the line.
*/
while(isspace(*cp++));
if (*cp != '\0' && *cp != '#') goto next;
if (strlen(p) > 0) {
bzero(prog, MAXPATHLEN);
strncpy(prog, p, strlen(p));
p = prog;
}
goto next;
}
/* Parse the 'from' candidate. */
f = cp;
while (!isspace(*cp) && *cp != '#' && *cp != '\0') cp++;
*cp++ = '\0';
while (isspace(*cp) && *cp != '#' && *cp != '\0') cp++;
t = cp;
while (!isspace(*cp) && *cp != '#' && *cp != '\0') cp++;
while (!isspace(*cp) && !iseol(*cp)) cp++;
*cp++ = '\0';
lm_add(p, strdup(f), strdup(t));
/* Skip and zero out the trailing whitespace */
while (isspace(*cp)) *cp++ = '\0';
/* Found a comment or EOL */
if (iseol(*cp)) goto next;
/* Parse 'to' mapping */
t = cp;
while (!isspace(*cp) && !iseol(*cp)) cp++;
*cp++ = '\0';
if ((strlen(f) > 0) && (strlen(t) > 0))
lm_add(p, strdup(f), strdup(t));
next:
bzero(line, sizeof(line));
}
(void)fclose(fp);