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Only set control msg metadata when actually sending a control msg

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Kovid Goyal 2022-07-07 14:16:47 +05:30
parent 90f3c0f9af
commit 5d1cf49fb6
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 11 additions and 6 deletions
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prewarm-launcher.c
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@ -294,12 +294,17 @@ create_launch_msg(int argc, char *argv[]) {
sio(stdin, STDIN_FILENO); sio(stdout, STDOUT_FILENO); sio(stderr, STDERR_FILENO); sio(stdin, STDIN_FILENO); sio(stdout, STDOUT_FILENO); sio(stderr, STDERR_FILENO);
#undef sio #undef sio
w("finish", ""); w("finish", "");
if (num_fds) {
struct cmsghdr *cmsg = CMSG_FIRSTHDR(&launch_msg_container); struct cmsghdr *cmsg = CMSG_FIRSTHDR(&launch_msg_container);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
cmsg->cmsg_len = CMSG_LEN(sizeof(fds[0]) * num_fds); cmsg->cmsg_len = CMSG_LEN(sizeof(fds[0]) * num_fds);
memcpy(CMSG_DATA(cmsg), fds, num_fds * sizeof(fds[0])); memcpy(CMSG_DATA(cmsg), fds, num_fds * sizeof(fds[0]));
launch_msg_container.msg_controllen = cmsg->cmsg_len; launch_msg_container.msg_controllen = cmsg->cmsg_len;
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
} else {
launch_msg_container.msg_controllen = 0;
launch_msg_container.msg_control = 0;
}
return true; return true;
#undef w #undef w
} }