remove error handling from some syscalls

Remove error handling from getegid/getgid/geteuid/getuid/getppid/getpid/getpgrp
Use strong_alias if fallbacks are needed

Signed-off-by: Peter S. Mazinger <ps.m@gmx.net>

libc/sysdeps/linux/common/bits/syscalls-common.h

@@ -97,6 +97,7 @@ type name(C_DECL_ARGS_##nargs(args)) {					\
 }
 
 #define _syscall0(args...)		SYSCALL_FUNC(0, args)
+#define _syscall_noerr0(args...)	SYSCALL_NOERR_FUNC(0, args)
 #define _syscall1(args...)		SYSCALL_FUNC(1, args)
 #define _syscall_noerr1(args...)	SYSCALL_NOERR_FUNC(1, args)
 #define _syscall2(args...)		SYSCALL_FUNC(2, args)

libc/sysdeps/linux/common/getegid.c

@@ -10,24 +10,12 @@
 #include <sys/syscall.h>
 #include <unistd.h>
 
-
-#if defined(__NR_getegid32)
+#ifdef __NR_getegid32
 # undef __NR_getegid
 # define __NR_getegid __NR_getegid32
-_syscall0(gid_t, getegid)
-
-#elif defined(__NR_getegid)
-# define __NR___syscall_getegid __NR_getegid
-static __inline__ _syscall0(int, __syscall_getegid)
-gid_t getegid(void)
-{
-	return (__syscall_getegid());
-}
-#else
-
-gid_t getegid(void)
-{
-	return (getgid());
-}
 #endif
+
+#ifdef __NR_getegid
+_syscall_noerr0(gid_t, getegid)
 libc_hidden_def(getegid)
+#endif

libc/sysdeps/linux/common/geteuid.c

@@ -10,25 +10,12 @@
 #include <sys/syscall.h>
 #include <unistd.h>
 
-
-#if defined(__NR_geteuid32)
+#ifdef __NR_geteuid32
 # undef __NR_geteuid
 # define __NR_geteuid __NR_geteuid32
-_syscall0(uid_t, geteuid)
-
-#elif defined(__NR_geteuid)
-# define __NR___syscall_geteuid __NR_geteuid
-static __inline__ _syscall0(int, __syscall_geteuid)
-uid_t geteuid(void)
-{
-	return (__syscall_geteuid());
-}
-
-#else
-uid_t geteuid(void)
-{
-	return (getuid());
-}
 #endif
 
+#ifdef __NR_geteuid
+_syscall_noerr0(uid_t, geteuid)
 libc_hidden_def(geteuid)
+#endif

libc/sysdeps/linux/common/getgid.c

@@ -10,7 +10,7 @@
 #include <sys/syscall.h>
 #include <unistd.h>
 
-#if defined __NR_getxgid
+#ifdef __NR_getxgid
 # undef __NR_getgid
 # define __NR_getgid __NR_getxgid
 #endif
@@ -19,5 +19,9 @@
 # define __NR_getgid __NR_getgid32
 #endif
 
-_syscall0(gid_t, getgid)
+_syscall_noerr0(gid_t, getgid)
 libc_hidden_def(getgid)
+#if !defined __NR_getegid32 && !defined __NR_getegid
+strong_alias(getgid,getegid)
+libc_hidden_def(getegid)
+#endif

libc/sysdeps/linux/common/getpgrp.c

@@ -12,7 +12,7 @@
 
 #ifdef __NR_getpgrp
 /* According to the manpage the POSIX.1 version is favoured */
-_syscall0(pid_t, getpgrp)
+_syscall_noerr0(pid_t, getpgrp)
 #elif defined __NR_getpgid && (defined __NR_getpid || defined __NR_getxpid)
 /* IA64 doesn't have a getpgrp syscall */
 pid_t getpgrp(void)

libc/sysdeps/linux/common/getpid.c

@@ -10,11 +10,13 @@
 #include <sys/syscall.h>
 #include <unistd.h>
 
-extern __typeof(getpid) __libc_getpid;
-#if defined __NR_getxpid
+#ifdef __NR_getxpid
+# undef __NR_getpid
 # define __NR_getpid __NR_getxpid
 #endif
-#define __NR___libc_getpid __NR_getpid
-_syscall0(pid_t, __libc_getpid)
-weak_alias(__libc_getpid, getpid)
+
+_syscall_noerr0(pid_t, getpid)
 libc_hidden_weak(getpid)
+#ifndef __NR_getppid
+strong_alias(getpid,getppid)
+#endif

libc/sysdeps/linux/common/getppid.c

@@ -9,11 +9,7 @@
 
 #include <sys/syscall.h>
 #include <unistd.h>
+
 #ifdef	__NR_getppid
-_syscall0(pid_t, getppid)
-#else
-pid_t getppid(void)
-{
-	return getpid();
-}
+_syscall_noerr0(pid_t, getppid)
 #endif

libc/sysdeps/linux/common/getuid.c

@@ -10,7 +10,7 @@
 #include <sys/syscall.h>
 #include <unistd.h>
 
-#if defined __NR_getxuid
+#ifdef __NR_getxuid
 # undef __NR_getuid
 # define __NR_getuid __NR_getxuid
 #endif
@@ -19,5 +19,9 @@
 # define __NR_getuid __NR_getuid32
 #endif
 
-_syscall0(uid_t, getuid)
+_syscall_noerr0(uid_t, getuid)
 libc_hidden_def(getuid)
+#if !defined __NR_geteuid32 && !defined __NR_geteuid
+strong_alias(getuid,geteuid)
+libc_hidden_def(geteuid)
+#endif

libc/sysdeps/linux/common/umask.c

@@ -15,5 +15,5 @@ static __inline__ _syscall1(__kernel_mode_t, __syscall_umask, __kernel_mode_t, m
 
 mode_t umask(mode_t mode)
 {
-	return (__syscall_umask(mode));
+	return __syscall_umask(mode);
 }