Add getpid support re ticket 29659

src/common/compat.h

@@ -135,6 +135,9 @@ void tsocks_once(tsocks_once_t *o, void (*init_routine)(void));
 #ifndef __NR_getdents64
 #define __NR_getdents64 -21
 #endif
+#ifndef __NR_getpid
+#define __NR_getpid -22
+#endif
 
 #define TSOCKS_NR_SOCKET    __NR_socket
 #define TSOCKS_NR_CONNECT   __NR_connect
@@ -157,6 +160,7 @@ void tsocks_once(tsocks_once_t *o, void (*init_routine)(void));
 #define TSOCKS_NR_MEMFD_CREATE __NR_memfd_create
 #define TSOCKS_NR_GETDENTS __NR_getdents
 #define TSOCKS_NR_GETDENTS64 __NR_getdents64
+#define TSOCKS_NR_GETPID __NR_getpid
 
 /*
  * Despite glibc providing wrappers for these calls for a long time

src/lib/syscall.c

@@ -467,6 +467,13 @@ static LIBC_SYSCALL_RET_TYPE handle_getdents64(va_list args)
 
 	return tsocks_libc_syscall(TSOCKS_NR_GETDENTS64, fd, dirp, count);
 }
+/*
+ * Handle getpid(2) syscall.
+ */
+static LIBC_SYSCALL_RET_TYPE handle_getpid(void)
+{
+	return tsocks_libc_syscall(TSOCKS_NR_GETPID);
+}
 
 #endif /* __linux__ */
 
@@ -595,6 +602,9 @@ LIBC_SYSCALL_RET_TYPE tsocks_syscall(long int number, va_list args)
 	case TSOCKS_NR_GETDENTS64:
 		ret = handle_getdents64(args);
 		break;
+	case TSOCKS_NR_GETPID:
+		ret = handle_getpid();
+		break;
 #endif /* __linux__ */
 	default:
 		/*