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Gisle Vanem's code for not trusting h_aliases to always be non-NULL

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Daniel Stenberg 2003-05-20 09:41:39 +00:00
parent 4da0428d9e
commit 9a6566e774
1 changed files with 10 additions and 6 deletions
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6
lib/hostip.c
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@ -455,18 +455,22 @@ static struct hostent* pack_hostent(char** buf, struct hostent* orig)
copy->h_aliases = (char**)bufptr;
/* Figure out how many aliases there are */
for (i = 0; orig->h_aliases[i] != NULL; ++i);
for (i = 0; orig->h_aliases && orig->h_aliases[i]; ++i);
/* Reserve room for the array */
bufptr += (i + 1) * sizeof(char*);
/* Clone all known aliases */
if(orig->h_aliases) {
for(i = 0; (str = orig->h_aliases[i]); i++) {
len = strlen(str) + 1;
strncpy(bufptr, str, len);
copy->h_aliases[i] = bufptr;
bufptr += len;
}
}
/* if(!orig->h_aliases) i was already set to 0 */
/* Terminate the alias list with a NULL */
copy->h_aliases[i] = NULL;