From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 16 Feb 2022 09:52:51 +0000 (+0100)
Subject: coccinelle: automatically switch some uses of memcpy() → mempcpy()
X-Git-Tag: v251-rc1~274^2~1
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=96ca229517c65c7f47c02e21e9778ac189a829c1;p=thirdparty%2Fsystemd.git

coccinelle: automatically switch some uses of memcpy() → mempcpy()

Inspired by #22520, let's add a coccinelle script that converts this
automatically.
---

diff --git a/coccinelle/mempcpy.cocci b/coccinelle/mempcpy.cocci
new file mode 100644
index 00000000000..efb657ae790
--- /dev/null
+++ b/coccinelle/mempcpy.cocci
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+@@
+expression x, y, z;
+@@
+- memcpy(x, y, z);
+- x += z;
++ x = mempcpy(x, y, z);
+@@
+expression x, y, z;
+@@
+- memcpy_safe(x, y, z);
+- x += z;
++ x = mempcpy_safe(x, y, z);
diff --git a/src/basic/hexdecoct.c b/src/basic/hexdecoct.c
index 8c83a0e71a6..190fca8ee4d 100644
--- a/src/basic/hexdecoct.c
+++ b/src/basic/hexdecoct.c
@@ -683,8 +683,7 @@ static int base64_append_width(
                         s += indent;
                 }
 
-                memcpy(s, x + width * line, act);
-                s += act;
+                s = mempcpy(s, x + width * line, act);
                 *(s++) = line < lines - 1 ? '\n' : '\0';
                 avail -= act;
         }
diff --git a/src/libsystemd/sd-journal/catalog.c b/src/libsystemd/sd-journal/catalog.c
index 4a2ba02ad0e..16bd4a63f1d 100644
--- a/src/libsystemd/sd-journal/catalog.c
+++ b/src/libsystemd/sd-journal/catalog.c
@@ -125,15 +125,12 @@ static char *combine_entries(const char *one, const char *two) {
 
         /* Body from @one */
         n = l1 - (b1 - one);
-        if (n > 0) {
-                memcpy(p, b1, n);
-                p += n;
-
+        if (n > 0)
+                p = mempcpy(p, b1, n);
         /* Body from @two */
-        } else {
+        else {
                 n = l2 - (b2 - two);
-                memcpy(p, b2, n);
-                p += n;
+                p = mempcpy(p, b2, n);
         }
 
         assert(p - dest <= (ptrdiff_t)(l1 + l2));