diff --git a/apps/src/uname.c b/apps/src/uname.c
index 03b8ba70..380e00ff 100644
--- a/apps/src/uname.c
+++ b/apps/src/uname.c
@@ -9,7 +9,7 @@ int main()
         return 1;
     }
 
-    char buf[32];
+    char buf[BUFSIZ];
     fgets(buf, sizeof(buf), fp);
 
     printf("%s\n", buf);
diff --git a/apps/src/uptime.c b/apps/src/uptime.c
index 03e1ac01..ee6313d5 100644
--- a/apps/src/uptime.c
+++ b/apps/src/uptime.c
@@ -10,7 +10,7 @@ int main()
         return 1;
     }
 
-    char buf[32];
+    char buf[BUFSIZ];
     fgets(buf, sizeof(buf), fp);
 
     if (ferror(fp))
diff --git a/libs/libc/include/stdio.h b/libs/libc/include/stdio.h
index 143408b8..796c81a8 100644
--- a/libs/libc/include/stdio.h
+++ b/libs/libc/include/stdio.h
@@ -8,6 +8,7 @@
 #include <bits/seek.h>
 
 #define FOPEN_MAX 32
+#define BUFSIZ 32
 
 typedef struct
 {
diff --git a/libs/libc/include/stdlib.h b/libs/libc/include/stdlib.h
index 37018749..cb49672d 100644
--- a/libs/libc/include/stdlib.h
+++ b/libs/libc/include/stdlib.h
@@ -2,8 +2,14 @@
 #define _STDLIB_H
 
 #include <bits/macros.h>
+#include <limits.h>
 #include <stddef.h>
 
+#define EXIT_SUCCESS 0
+#define EXIT_FAILURE 1
+
+#define RAND_MAX INT_MAX
+
 #ifdef __cplusplus
 extern "C"
 {
diff --git a/libs/libc/src/file.cpp b/libs/libc/src/file.cpp
index ce288401..55378383 100644
--- a/libs/libc/src/file.cpp
+++ b/libs/libc/src/file.cpp
@@ -13,8 +13,8 @@ void file_read_buf(FILE* stream)
 {
     if (!stream->f_buf)
     {
-        stream->f_buf = (char*)malloc(32); // FIXME: Handle errors.
-        stream->f_bufrsize = 32;
+        stream->f_buf = (char*)malloc(BUFSIZ); // FIXME: Handle errors.
+        stream->f_bufrsize = BUFSIZ;
     }
     stream->f_bufoff = 0;
     ssize_t nread = read(stream->f_fd, stream->f_buf, stream->f_bufrsize);