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authorLaurent Bercot <ska-skaware@skarnet.org>2019-02-19 14:54:44 +0000
committerLaurent Bercot <ska-skaware@skarnet.org>2019-02-19 14:54:44 +0000
commit15eda3d33f9e1160d438d370acd442ef3dbba63f (patch)
tree88f50dd23414f9bee659a6438fa62131825d072d /src/sysdeps/trynbwaitall.c
parent332d4cbc24ab82cc77bccb0ce2c158c5e86a8fac (diff)
downloadskalibs-15eda3d33f9e1160d438d370acd442ef3dbba63f.tar.xz
Add DragonFly macro; remove nbwaitall and ancilautoclose
Diffstat (limited to 'src/sysdeps/trynbwaitall.c')
-rw-r--r--src/sysdeps/trynbwaitall.c121
1 files changed, 0 insertions, 121 deletions
diff --git a/src/sysdeps/trynbwaitall.c b/src/sysdeps/trynbwaitall.c
deleted file mode 100644
index 48f6b89..0000000
--- a/src/sysdeps/trynbwaitall.c
+++ /dev/null
@@ -1,121 +0,0 @@
-/* ISC license. */
-
-#undef _POSIX_C_SOURCE
-#undef _XOPEN_SOURCE
-
-#ifndef _XPG4_2
-#define _XPG4_2
-#endif
-
-#ifndef _BSD_SOURCE
-#define _BSD_SOURCE
-#endif
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE
-#endif
-
-#include <fcntl.h>
-#include <unistd.h>
-#include <errno.h>
-#include <signal.h>
-#include <sys/socket.h>
-#include <sys/select.h>
-#include <sys/uio.h>
-
-#ifndef MSG_NOSIGNAL
-#define MSG_NOSIGNAL 0
-#endif
-
-#ifndef MSG_DONTWAIT
-#define MSG_DONTWAIT 0
-#endif
-
-
-static int ndelay_on (int fd)
-{
- int got = fcntl(fd, F_GETFL) ;
- return (got == -1) ? -1 : fcntl(fd, F_SETFL, got | O_NONBLOCK) ;
-}
-
-static int child (int p, int fd)
-{
- char buf[8] ;
- struct iovec v = { .iov_base = buf, .iov_len = 8 } ;
- struct msghdr msg =
- {
- .msg_name = 0,
- .msg_namelen = 0,
- .msg_iov = &v,
- .msg_iovlen = 1,
- .msg_control = 0,
- .msg_controllen = 0
- } ;
- fd_set rfds ;
- if (ndelay_on(fd) < 0) return 111 ;
- FD_ZERO(&rfds) ;
- FD_SET(fd, &rfds) ;
- if (write(p, "", 1) < 1) return 111 ; /* sync with the parent */
- if (select(fd+1, &rfds, 0, 0, 0) < 1) return 111 ;
-
- /* The following recvmsg may block, despite setting the fd
- non-blocking. That is what we're testing. */
-
- if (recvmsg(fd, &msg, MSG_WAITALL | MSG_DONTWAIT) < 1) return 111 ;
- if (write(p, "", 1) < 1) return 111 ;
- return 0 ;
-}
-
-static int parent (pid_t pid, int p, int fd)
-{
- char c ;
- struct iovec v = { .iov_base = &c, .iov_len = 1 } ;
- struct msghdr msg =
- {
- .msg_name = 0,
- .msg_namelen = 0,
- .msg_iov = &v,
- .msg_iovlen = 1,
- .msg_control = 0,
- .msg_controllen = 0
- } ;
- struct timeval tv = { .tv_sec = 2, .tv_usec = 0 } ;
- fd_set rfds ;
- unsigned int n = p > fd ? p : fd ;
- int r ;
- FD_ZERO(&rfds) ;
- FD_SET(p, &rfds) ;
- if (read(p, &c, 1) < 1) return 111 ;
- if (sendmsg(fd, &msg, MSG_NOSIGNAL) < 1) return 111 ;
- for (;;)
- {
- r = select(n+1, &rfds, 0, 0, &tv) ;
- if (r >= 0 || errno != EINTR) break ;
- }
- if (!r) /* child is still blocking on recvmsg() after 2 seconds */
- {
- kill(pid, SIGTERM) ;
- return 1 ;
- }
- if (read(p, &c, 1) < 1) return 111 ;
- return 0 ;
-}
-
-int main (void)
-{
- pid_t pid ;
- int fd[2] ;
- int p[2] ;
- if (pipe(p) < 0) return 111 ;
- if (socketpair(AF_UNIX, SOCK_STREAM, 0, fd) < 0) return 111 ;
- pid = fork() ;
- if (pid < 0) return 111 ;
- if (!pid)
- {
- close(p[0]) ;
- close(fd[0]) ;
- return child(p[1], fd[1]) ;
- }
- close(p[1]) ;
- close(fd[1]) ;
- return parent(pid, p[0], fd[0]) ;
-}