trousers: Fix musl compile error

use POSIX getpwent instead of getpwent_r
This was causing the libtspi to have the getpwent_r with when loaded via tpm-tools, it would fail.

[ Yocto #11095]

Signed-off-by: Armin Kuster <akuster808@gmail.com>

recipes-tpm/trousers/files/get-user-ps-path-use-POSIX-getpwent-instead-of-getpwe.patch

@@ -0,0 +1,49 @@
+trousers: fix compiling with musl
+
+use POSIX getpwent instead of getpwent_r
+
+Upstream-Status: Submitted
+
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+Index: git/src/tspi/ps/tspps.c
+===================================================================
+--- git.orig/src/tspi/ps/tspps.c
++++ git/src/tspi/ps/tspps.c
+@@ -66,9 +66,6 @@ get_user_ps_path(char **file)
+ 	TSS_RESULT result;
+ 	char *file_name = NULL, *home_dir = NULL;
+ 	struct passwd *pwp;
+-#if (defined (__linux) || defined (linux) || defined(__GLIBC__))
+-	struct passwd pw;
+-#endif
+ 	struct stat stat_buf;
+ 	char buf[PASSWD_BUFSIZE];
+ 	uid_t euid;
+@@ -96,24 +93,15 @@ get_user_ps_path(char **file)
+ #else
+ 	setpwent();
+ 	while (1) {
+-#if (defined (__linux) || defined (linux) || defined(__GLIBC__))
+-		rc = getpwent_r(&pw, buf, PASSWD_BUFSIZE, &pwp);
+-		if (rc) {
+-			LogDebugFn("USER PS: Error getting path to home directory: getpwent_r: %s",
+-				   strerror(rc));
+-			endpwent();
+-			return TSPERR(TSS_E_INTERNAL_ERROR);
+-		}
+-
+-#elif (defined (__FreeBSD__) || defined (__OpenBSD__))
+ 		if ((pwp = getpwent()) == NULL) {
+ 			LogDebugFn("USER PS: Error getting path to home directory: getpwent: %s",
+                                    strerror(rc));
+ 			endpwent();
++#if (defined (__FreeBSD__) || defined (__OpenBSD__))
+ 			MUTEX_UNLOCK(user_ps_path);
++#endif
+ 			return TSPERR(TSS_E_INTERNAL_ERROR);
+ 		}
+-#endif
+ 		if (euid == pwp->pw_uid) {
+                         home_dir = strdup(pwp->pw_dir);
+                         break;

recipes-tpm/trousers/trousers_git.bb

@@ -14,6 +14,7 @@ SRC_URI = " \
     	file://trousers.init.sh \
     	file://trousers-udev.rules \
     	file://tcsd.service \
+        file://get-user-ps-path-use-POSIX-getpwent-instead-of-getpwe.patch \
     	"
 
 S = "${WORKDIR}/git"