posix.cfg: Added support for getpwent_r().

Author: orbitcowboy

cfg/posix.cfg

@@ -3271,6 +3271,29 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     <noreturn>false</noreturn>
     <warn severity="portability">Non reentrant function 'getpwent' called. For threadsafe applications it is recommended to use the reentrant replacement function 'getpwent_r'.</warn>
   </function>
+  <!-- https://man7.org/linux/man-pages/man3/getpwent_r.3.html-->
+  <!-- int getpwent_r(struct passwd *restrict pwbuf, char *restrict buf, size_t buflen, struct passwd **restrict pwbufp); -->
+  <function name="getpwent_r">
+    <use-retval/>
+    <returnValue type="int"/>
+    <noreturn>false</noreturn>
+    <arg nr="1" direction="in">
+      <not-null/>
+      <not-uninit/>
+    </arg>
+    <arg nr="2" direction="out">
+      <not-null/>
+      <minsize type="argvalue" arg="3"/>
+    </arg>
+    <arg nr="3" direction="in">
+      <not-uninit/>
+      <valid>0:</valid>
+    </arg>
+    <arg nr="4" direction="out">
+      <not-null/>
+      <not-bool/>
+    </arg>
+  </function>
   <!--struct passwd *getpwnam(const char *); -->
   <function name="getpwnam">
     <use-retval/>

test/cfg/posix.c

@@ -17,6 +17,7 @@
 #include <sys/time.h>
 #include <sys/types.h>
 #include <grp.h>
+#include <pwd.h>
 #include <dlfcn.h>
 #include <fcntl.h>
 // unavailable on some linux systems #include <ndbm.h>
@@ -34,6 +35,17 @@
 #include <string.h>
 #include <strings.h>
 
+int nullPointer_getpwent_r(struct passwd *restrict pwbuf, char *restrict buf, size_t buflen, struct passwd **restrict pwbufp)
+{
+    // cppcheck-suppress nullPointer
+    (void) getpwent_r(NULL, buf, buflen, pwbufp);
+    // cppcheck-suppress nullPointer
+    (void) getpwent_r(pwbuf, NULL, buflen, pwbufp);
+    // cppcheck-suppress nullPointer
+    (void) getpwent_r(pwbuf, buf, buflen, NULL);
+    return getpwent_r(pwbuf, buf, buflen, pwbufp);
+}
+
 int nullPointer_getgrgid_r(gid_t gid, struct group *restrict grp, char *restrict buf, size_t buflen, struct group **restrict result)
 {
     // cppcheck-suppress nullPointer