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Replace static constant MAXHOSTNAMELEN by dynamic alloaction. 

(Patch from Andreas Voegele)
This commit is contained in:
mainzelm 2003-06-25 08:44:43 +00:00
parent 240a07af3b
commit ecfbbfeaab
1 changed files with 31 additions and 4 deletions
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35
c/unix/socket.c
View File

@ -381,11 +381,38 @@ s48_close_socket_half(s48_value channel, s48_value input_p)
static s48_value
s48_get_host_name(void)
{
char mbuff[MAXHOSTNAMELEN];
char *mbuff = NULL;
size_t mbuff_len = 0;
int status = 0;
s48_value name;
if (gethostname(mbuff, sizeof(mbuff)) < 0)
do {
char *tmp;
mbuff_len += 256; /* Initial guess */
tmp = (char *) realloc(mbuff, mbuff_len);
if (tmp == NULL) {
free(mbuff);
s48_raise_os_error(ENOMEM);
}
else
mbuff = tmp;
} while (((status = gethostname(mbuff, mbuff_len)) == 0
&& !memchr(mbuff, '\0', mbuff_len))
#ifdef ENAMETOOLONG
|| errno == ENAMETOOLONG
#endif
);
if (status != 0 && errno != 0) {
/* gethostname failed, abort. */
free(mbuff);
s48_raise_os_error(errno);
return s48_enter_string(mbuff);
}
name = s48_enter_string(mbuff);
free(mbuff);
return name;
}