[6.0] 0f53c785d Expose VPF_Read()

[Poul-Henning Kamp]

commit 0f53c785d4e815cc2800eec24a7fd008f47ef35f
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Tue Mar 27 11:11:34 2018 +0000

    Expose VPF_Read()

diff --git a/include/vpf.h b/include/vpf.h
index 822f2d360..d5266ac7c 100644
--- a/include/vpf.h
+++ b/include/vpf.h
@@ -36,5 +36,6 @@ struct vpf_fh *VPF_Open(const char *path, mode_t mode, pid_t *pidptr);
 int VPF_Write(struct vpf_fh *pfh);
 int VPF_Close(struct vpf_fh *pfh);
 int VPF_Remove(struct vpf_fh *pfh);
+int VPF_read(const char *path, pid_t *);
 
 #endif
diff --git a/lib/libvarnish/vpf.c b/lib/libvarnish/vpf.c
index 5626b9e84..915a028ec 100644
--- a/lib/libvarnish/vpf.c
+++ b/lib/libvarnish/vpf.c
@@ -72,8 +72,8 @@ vpf_verify(const struct vpf_fh *pfh)
 	return (0);
 }
 
-static int
-vpf_read(const char *path, pid_t *pidptr)
+int
+VPF_read(const char *path, pid_t *pidptr)
 {
 	char buf[16], *endptr;
 	int error, fd, i;
@@ -129,7 +129,7 @@ VPF_Open(const char *path, mode_t mode, pid_t *pidptr)
 	    O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC | O_NONBLOCK, mode);
 	if (fd == -1) {
 		if (errno == EWOULDBLOCK && pidptr != NULL) {
-			errno = vpf_read(pfh->pf_path, pidptr);
+			errno = VPF_read(pfh->pf_path, pidptr);
 			if (errno == 0)
 				errno = EEXIST;
 		}