posix.cfg: Added support for pwrite().

cfg/posix.cfg

@@ -2126,6 +2126,31 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
       <valid>0:</valid>
     </arg>
   </function>
+  <!-- https://man7.org/linux/man-pages/man3/write.3p.html -->
+  <!-- ssize_t pwrite(int fd, const void *buf, size_t count, off_t offset); -->
+  <function name="pwrite">
+    <returnValue type="ssize_t"/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1" direction="in">
+      <valid>0:</valid>
+      <not-uninit/>
+    </arg>
+    <arg nr="2" direction="in">
+      <not-null/>
+      <not-uninit/>
+      <minsize type="argvalue" arg="3"/>
+    </arg>
+    <arg nr="3" direction="in">
+      <not-uninit/>
+      <not-bool/>
+      <valid>0:</valid>
+    </arg>
+    <arg nr="4" direction="in">
+      <not-uninit/>
+      <not-bool/>
+    </arg>
+  </function> 
   <!-- ssize_t recv(int sockfd, void *buf, size_t len, int flags); -->
   <function name="recv">
     <returnValue type="ssize_t"/>

test/cfg/posix.c

@@ -31,6 +31,13 @@
 #include <wchar.h>
 #include <string.h>
 
+ssize_t nullPointer_pwrite(int fd, const void *buf, size_t nbyte, off_t offset)
+{
+    // cppcheck-suppress nullPointer
+    (void)pwrite(fd,NULL,nbyte,offset);
+    return pwrite(fd,buf,nbyte,offset);
+}
+
 int nullPointer_ttyname_r(int fd, char *buf, size_t buflen)
 {
     // cppcheck-suppress nullPointer