Swap the VSB_tofile() arguments

Automated with Coccinelle, so the semantic patch could be reused in the
vtest project.

Closes #3238

bin/varnishd/common/common_vsmw.c

@@ -208,7 +208,7 @@ vsmw_append_record(struct vsmw *vsmw, struct vsmwseg *seg, char act)
 	VSB_clear(vsmw->vsb);
 	vsmw_fmt_index(vsmw, seg, act);
 	AZ(VSB_finish(vsmw->vsb));
-	XXXAZ(VSB_tofile(fd, vsmw->vsb)); // XXX handle ENOSPC? #2764
+	XXXAZ(VSB_tofile(vsmw->vsb, fd)); // XXX handle ENOSPC? #2764
 	closefd(&fd);
 }
 
@@ -255,7 +255,7 @@ vsmw_delseg(struct vsmw *vsmw, struct vsmwseg *seg)
 		VTAILQ_FOREACH(s2, &vsmw->segs, list)
 			vsmw_fmt_index(vsmw, s2, '+');
 		AZ(VSB_finish(vsmw->vsb));
-		XXXAZ(VSB_tofile(fd, vsmw->vsb)); // XXX handle ENOSPC? #2764
+		XXXAZ(VSB_tofile(vsmw->vsb, fd)); // XXX handle ENOSPC? #2764
 		closefd(&fd);
 		AZ(renameat(vsmw->vdirfd, t, vsmw->vdirfd, vsmw->idx));
 		REPLACE(t, NULL);

bin/varnishd/mgt/mgt_cli.c

@@ -147,7 +147,7 @@ mcf_askchild(struct cli *cli, const char * const *av, void *priv)
 	}
 	VSB_putc(cli_buf, '\n');
 	AZ(VSB_finish(cli_buf));
-	if (VSB_tofile(cli_o, cli_buf)) {
+	if (VSB_tofile(cli_buf, cli_o)) {
 		VCLI_SetResult(cli, CLIS_COMMS);
 		VCLI_Out(cli, "CLI communication error");
 		MCH_Cli_Fail();
@@ -196,7 +196,7 @@ mgt_cli_askchild(unsigned *status, char **resp, const char *fmt, ...)
 	AZ(VSB_finish(cli_buf));
 	i = VSB_len(cli_buf);
 	assert(i > 0 && VSB_data(cli_buf)[i - 1] == '\n');
-	if (VSB_tofile(cli_o, cli_buf)) {
+	if (VSB_tofile(cli_buf, cli_o)) {
 		*status = CLIS_COMMS;
 		if (resp != NULL)
 			*resp = strdup("CLI communication error");

bin/varnishtest/vtc_haproxy.c

@@ -229,7 +229,7 @@ cmd_haproxy_cli_send(CMD_ARGS)
 	}
 	vtc_dump(hc->vl, 4, "CLI send", VSB_data(vsb), -1);
 
-	if (VSB_tofile(hc->sock, vsb))
+	if (VSB_tofile(vsb, hc->sock))
 		vtc_fatal(hc->vl,
 		    "CLI fd %d send error %s", hc->sock, strerror(errno));
 

bin/varnishtest/vtc_http.c

@@ -217,7 +217,7 @@ http_write(const struct http *hp, int lvl, const char *pfx)
 
 	AZ(VSB_finish(hp->vsb));
 	vtc_dump(hp->vl, lvl, pfx, VSB_data(hp->vsb), VSB_len(hp->vsb));
-	if (VSB_tofile(hp->fd, hp->vsb))
+	if (VSB_tofile(hp->vsb, hp->fd))
 		vtc_log(hp->vl, hp->fatal, "Write failed: %s",
 		    strerror(errno));
 }
@@ -1381,7 +1381,7 @@ cmd_http_sendhex(CMD_ARGS)
 	vsb = vtc_hex_to_bin(hp->vl, av[1]);
 	assert(VSB_len(vsb) >= 0);
 	vtc_hexdump(hp->vl, 4, "sendhex", VSB_data(vsb), VSB_len(vsb));
-	if (VSB_tofile(hp->fd, vsb))
+	if (VSB_tofile(vsb, hp->fd))
 		vtc_log(hp->vl, hp->fatal, "Write failed: %s",
 		    strerror(errno));
 	VSB_destroy(&vsb);

bin/varnishtest/vtc_process.c

@@ -803,7 +803,7 @@ process_write_hex(const struct process *p, const char *text)
 	vsb = vtc_hex_to_bin(p->vl, text);
 	assert(VSB_len(vsb) >= 0);
 	vtc_hexdump(p->vl, 4, "sendhex", VSB_data(vsb), VSB_len(vsb));
-	AZ(VSB_tofile(p->fd_term, vsb));
+	AZ(VSB_tofile(vsb, p->fd_term));
 	VSB_destroy(&vsb);
 }
 

bin/varnishtest/vtc_proxy.c

@@ -128,7 +128,7 @@ vtc_send_proxy(int fd, int version, const struct suckaddr *sac,
 		WRONG("Wrong proxy version");
 
 	AZ(VSB_finish(vsb));
-	i = VSB_tofile(fd, vsb);
+	i = VSB_tofile(vsb, fd);
 	VSB_delete(vsb);
 	return (i);
 }

include/vsb.h

@@ -89,7 +89,7 @@ void		 VSB_quote_pfx(struct vsb *, const char*, const void *,
 		     int len, int how);
 void		 VSB_quote(struct vsb *, const void *, int len, int how);
 void		 VSB_indent(struct vsb *, int);
-int		 VSB_tofile(int fd, const struct vsb *);
+int		 VSB_tofile(const struct vsb *, int fd);
 #ifdef __cplusplus
 };
 #endif

lib/libvarnish/vsb.c

@@ -658,7 +658,7 @@ VSB_indent(struct vsb *s, int i)
 }
 
 int
-VSB_tofile(int fd, const struct vsb *s)
+VSB_tofile(const struct vsb *s, int fd)
 {
 	int sz;
 

lib/libvcc/vcc_compile.c

@@ -110,7 +110,7 @@ TLWriteVSB(struct vcc *tl, const char *fn, const struct vsb *vsb,
 		    what, fn, strerror(errno));
 		return (-1);
 	}
-	i = VSB_tofile(fo, vsb);
+	i = VSB_tofile(vsb, fo);
 	if (i) {
 		VSB_printf(tl->sb,
 		    "Could not write %s to %s: %s\n",

tools/coccinelle/vsb_tofile.cocci

+/*
+ * This patch fixes the order of VSB_tofile arguments.
+ */
+
+@@
+idexpression struct vsb *vsb;
+idexpression int fd;
+@@
+
+- VSB_tofile(fd, vsb)
++ VSB_tofile(vsb, fd)
+
+@@
+idexpression struct vsb[] vsb;
+idexpression int fd;
+@@
+
+- VSB_tofile(fd, vsb)
++ VSB_tofile(vsb, fd)
+
+@@
+idexpression struct vsb *vsb;
+expression fd;
+@@
+
+- VSB_tofile(fd, vsb)
++ VSB_tofile(vsb, fd)
+
+/* Opportunistic fallback */
+
+@@
+idexpression int fd;
+expression vsb;
+@@
+
+- VSB_tofile(fd, vsb)
++ VSB_tofile(vsb, fd)
+
+/* Opportunistic last resort */
+
+@@
+expression fd, other;
+@@
+
+- VSB_tofile(fd, other->vsb)
++ VSB_tofile(other->vsb, fd)