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Yank out the NOPOLL conditionals. libc_r no longer needs it, and this

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library depends on other things that come *way* later than poll() now
(sigset size changes in particular)
This commit is contained in:
Peter Wemm 2000-09-04 21:28:16 +00:00
parent c22a309c55
commit 8cae7cc3d6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=65453
1 changed files with 26 additions and 104 deletions
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130
lib/libc/net/res_send.c
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@ -99,13 +99,6 @@ static char rcsid[] = "$FreeBSD$";
#include "res_config.h"
#ifdef NOPOLL /* libc_r doesn't wrap poll yet() */
static int use_poll = 0;
#else
static int use_poll = 1; /* adapt to poll() syscall availability */
/* 0 = not present, 1 = try it, 2 = exists */
#endif
static int s = -1; /* socket used for communications */
static int connected = 0; /* is the socket connected */
static int vc = 0; /* is the socket a virtual circuit? */
@ -594,13 +587,9 @@ res_send(buf, buflen, ans, anssiz)
/*
* Use datagrams.
*/
#ifndef NOPOLL
struct pollfd pfd;
int msec;
#endif
struct timeval timeout;
fd_set dsmask, *dsmaskp;
int dsmasklen;
struct timeval timeout, itv;
struct sockaddr_storage from;
int fromlen;
@ -703,111 +692,44 @@ res_send(buf, buflen, ans, anssiz)
/*
* Wait for reply
*/
#ifndef NOPOLL
othersyscall:
if (use_poll) {
struct timeval itv;
msec = (_res.retrans << try) * 1000;
if (try > 0)
msec /= _res.nscount;
if (msec <= 0)
msec = 1000;
gettimeofday(&timeout, NULL);
itv.tv_sec = msec / 1000;
itv.tv_usec = (msec % 1000) * 1000;
timeradd(&timeout, &itv, &timeout);
} else {
#endif
timeout.tv_sec = (_res.retrans << try);
if (try > 0)
timeout.tv_sec /= _res.nscount;
if ((long) timeout.tv_sec <= 0)
timeout.tv_sec = 1;
timeout.tv_usec = 0;
#ifndef NOPOLL
}
#endif
msec = (_res.retrans << try) * 1000;
if (try > 0)
msec /= _res.nscount;
if (msec <= 0)
msec = 1000;
gettimeofday(&timeout, NULL);
itv.tv_sec = msec / 1000;
itv.tv_usec = (msec % 1000) * 1000;
timeradd(&timeout, &itv, &timeout);
wait:
if (s < 0) {
Perror(stderr, "s out-of-bounds", EMFILE);
res_close();
goto next_ns;
}
#ifndef NOPOLL
if (use_poll) {
struct sigaction sa, osa;
int sigsys_installed = 0;
pfd.fd = s;
pfd.events = POLLIN;
n = poll(&pfd, 1, msec);
if (n < 0) {
if (errno == EINTR) {
struct timeval ctv;
pfd.fd = s;
pfd.events = POLLIN;
if (use_poll == 1) {
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sa.sa_handler = SIG_IGN;
if (sigaction(SIGSYS, &sa, &osa) >= 0)
sigsys_installed = 1;
}
n = poll(&pfd, 1, msec);
if (sigsys_installed == 1) {
int oerrno = errno;
sigaction(SIGSYS, &osa, NULL);
errno = oerrno;
}
/* XXX why does nosys() return EINVAL? */
if (n < 0 && (errno == ENOSYS ||
errno == EINVAL)) {
use_poll = 0;
goto othersyscall;
} else if (use_poll == 1)
use_poll = 2;
if (n < 0) {
if (errno == EINTR) {
struct timeval ctv;
gettimeofday(&ctv, NULL);
if (timercmp(&ctv, &timeout, <)) {
timersub(&timeout,
&ctv, &ctv);
msec = ctv.tv_sec * 1000;
msec += ctv.tv_usec / 1000;
goto wait;
}
} else {
Perror(stderr, "poll", errno);
res_close();
goto next_ns;
}
}
} else {
#endif
dsmasklen = howmany(s + 1, NFDBITS) *
sizeof(fd_mask);
if (dsmasklen > sizeof(fd_set)) {
dsmaskp = (fd_set *)malloc(dsmasklen);
if (dsmaskp == NULL) {
res_close();
goto next_ns;
}
} else
dsmaskp = &dsmask;
/* only zero what we need */
bzero((char *)dsmaskp, dsmasklen);
FD_SET(s, dsmaskp);
n = select(s + 1, dsmaskp, (fd_set *)NULL,
(fd_set *)NULL, &timeout);
if (dsmaskp != &dsmask)
free(dsmaskp);
if (n < 0) {
if (errno == EINTR)
gettimeofday(&ctv, NULL);
if (timercmp(&ctv, &timeout, <)) {
timersub(&timeout,
&ctv, &ctv);
msec = ctv.tv_sec * 1000;
msec += ctv.tv_usec / 1000;
goto wait;
Perror(stderr, "select", errno);
}
} else {
Perror(stderr, "poll", errno);
res_close();
goto next_ns;
}
#ifndef NOPOLL
}
#endif
if (n == 0) {
/*