posix.cfg: Added support for pread().

cfg/posix.cfg

@@ -2106,6 +2106,29 @@ 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/read.3p.html -->
+  <!-- ssize_t pread(int fildes, void *buf, size_t nbyte, off_t offset); -->
+  <function name="pread">
+    <leak-ignore/>
+    <returnValue type="ssize_t"/>
+    <arg nr="1" direction="in">
+      <not-uninit/>
+      <not-bool/>
+      <valid>0:</valid>
+    </arg>
+    <arg nr="2" direction="out">
+      <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 write(int fildes, const void *buf, size_t nbyte); -->
   <function name="write">
     <noreturn>false</noreturn>

test/cfg/posix.c

@@ -31,6 +31,20 @@
 #include <wchar.h>
 #include <string.h>
 
+ssize_t uninitvar_pread(int fd, void *buf, size_t nbyte, off_t offset)
+{
+    int Fd;
+    // cppcheck-suppress uninitvar
+    (void)pread(Fd,buf,nbyte,offset);
+    size_t Nbyte;
+    // cppcheck-suppress uninitvar
+    (void)pread(fd,buf,Nbyte,offset);
+    off_t Offset;
+    // cppcheck-suppress uninitvar
+    (void)pread(fd,buf,nbyte,Offset);
+    return pread(fd,buf,nbyte,offset);
+}
+
 ssize_t nullPointer_pwrite(int fd, const void *buf, size_t nbyte, off_t offset)
 {
     // cppcheck-suppress nullPointer