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File pun.diff of Package openntpd
From: Jan Engelhardt <jengelh@inai.de> Date: 2015-03-14 01:15:33.562266820 +0100 build: resolve a compilation warning compat/imsg-buffer.c: In function 'msgbuf_write': compat/imsg-buffer.c:258:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] *(int *)CMSG_DATA(cmsg) = buf->fd; [rpmlint: I: Program is likely to break with new gcc. Try -fno-strict-aliasing. W: openntpd strict-aliasing-punning compat/imsg-buffer.c:258 ] CMSG_DATA yields a pointer to char, which, despite cmsghdr.cmsg_data being aligned for int, by the standard is not guaranteed to be. --- compat/imsg-buffer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: openntpd-5.7p3/compat/imsg-buffer.c =================================================================== --- openntpd-5.7p3.orig/compat/imsg-buffer.c +++ openntpd-5.7p3/compat/imsg-buffer.c @@ -255,7 +255,7 @@ msgbuf_write(struct msgbuf *msgbuf) cmsg->cmsg_len = CMSG_LEN(sizeof(int)); cmsg->cmsg_level = SOL_SOCKET; cmsg->cmsg_type = SCM_RIGHTS; - *(int *)CMSG_DATA(cmsg) = buf->fd; + memcpy(CMSG_DATA(cmsg), &buf->fd, sizeof(int)); } again:
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