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don't test errno if there has been no error

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This commit is contained in:
Andreas Gustafsson 1999-08-19 11:18:37 +00:00
parent de0e5c4fdb
commit 27e48d2eea
1 changed files with 11 additions and 10 deletions
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21
lib/isc/unix/ifiter_ioctl.c
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@ -85,9 +85,18 @@ isc_interfaceiter_create(isc_mem_t *mctx, isc_interfaceiter_t **iterp)
iter->ifc.ifc_len = iter->bufsize;
iter->ifc.ifc_buf = iter->buf;
if (ioctl(iter->socket, SIOCGIFCONF, (char *) &iter->ifc) >= 0)
{
if (ioctl(iter->socket, SIOCGIFCONF, (char *) &iter->ifc) < 0) {
if (errno != EINVAL) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"get interface configuration: %s",
strerror(errno));
result = ISC_R_UNEXPECTED;
goto ioctl_failure;
}
/* EINVAL. Retry with a bigger buffer. */
} else {
/*
* The ioctl succeeded.
* Some OS's just return what will fit rather
* than set EINVAL if the buffer is too small
* to fit all the interfaces in. If
@ -99,14 +108,6 @@ isc_interfaceiter_create(isc_mem_t *mctx, isc_interfaceiter_t **iterp)
< iter->bufsize)
break;
}
if (errno != EINVAL) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"get interface configuration: %s",
strerror(errno));
result = ISC_R_UNEXPECTED;
goto ioctl_failure;
}
if (iter->bufsize >= IFCONF_BUFSIZE_MAX) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"get interface configuration: "