Dmitry V. Levin
e25fb4fd8e
* tests/scm_rights.c (main): Send zero integer to avoid issues with endianness. * tests/scm_rights-fd.test: Update grep patterns.
72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
#include <assert.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <sys/wait.h>
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int main(void)
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{
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union {
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struct cmsghdr cmsghdr;
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char buf[CMSG_SPACE(sizeof(int))];
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} control = {};
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int fd;
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int data = 0;
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struct iovec iov = {
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.iov_base = &data,
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.iov_len = sizeof(iov)
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};
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struct msghdr mh = {
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.msg_iov = &iov,
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.msg_iovlen = 1,
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.msg_control = &control,
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.msg_controllen = sizeof(control)
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};
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while ((fd = open("/dev/null", O_RDWR)) < 3)
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assert(fd >= 0);
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(void) close(3);
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int sv[2];
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assert(socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == 0);
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pid_t pid = fork();
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assert(pid >= 0);
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if (pid) {
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assert(close(sv[0]) == 0);
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assert(dup2(sv[1], 1) == 1);
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assert(close(sv[1]) == 0);
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assert((fd = open("/dev/null", O_RDWR)) == 3);
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struct cmsghdr *cmsg = CMSG_FIRSTHDR(&mh);
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cmsg->cmsg_level = SOL_SOCKET;
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cmsg->cmsg_type = SCM_RIGHTS;
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cmsg->cmsg_len = CMSG_LEN(sizeof fd);
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memcpy(CMSG_DATA(cmsg), &fd, sizeof fd);
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mh.msg_controllen = cmsg->cmsg_len;
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assert(sendmsg(1, &mh, 0) == sizeof(iov));
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assert(close(1) == 0);
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int status;
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assert(waitpid(pid, &status, 0) == pid);
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assert(status == 0);
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} else {
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assert(close(sv[1]) == 0);
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assert(dup2(sv[0], 0) == 0);
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assert(close(sv[0]) == 0);
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assert(recvmsg(0, &mh, 0) == sizeof(iov));
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assert(close(0) == 0);
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}
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return 0;
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}
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