3 files changed, 8 insertions, 2 deletions
diff --git a/src/user/lib/include/ctype.h b/src/user/lib/include/ctype.h
index 02d7179..1ebb111 100644
--- a/src/user/lib/include/ctype.h
+++ b/src/user/lib/include/ctype.h
@@ -6,6 +6,7 @@ int iscntrl(int c);
 int isdigit(int c);
 int isgraph(int c);
 int islower(int c);
+int isprint(int c);
 int ispunct(int c);
 int isspace(int c);
 int isupper(int c);
diff --git a/src/user/lib/include/locale.h b/src/user/lib/include/locale.h
index 263dfb5..1221375 100644
--- a/src/user/lib/include/locale.h
+++ b/src/user/lib/include/locale.h
@@ -67,4 +67,7 @@ static inline struct lconv *localeconv(void) {
 	return &locale;
 }
 
-char *setlocale(int category, const char *locale);
+static inline char *setlocale(int category, const char *locale) {
+	(void)category; (void)locale;
+	return NULL;
+}
diff --git a/src/user/lib/include/stdio.h b/src/user/lib/include/stdio.h
index 84fb515..dd6a078 100644
--- a/src/user/lib/include/stdio.h
+++ b/src/user/lib/include/stdio.h
@@ -27,6 +27,8 @@
 int printf(const char *restrict fmt, ...);
 int fprintf(FILE *restrict f, const char *restrict fmt, ...);
 
+int sprintf(char *restrict s, const char *restrict fmt, ...);
+
 int vprintf(const char *restrict fmt, va_list ap);
 int vfprintf(FILE *restrict f, const char *restrict fmt, va_list ap);
 
@@ -56,7 +58,7 @@ int fgetc(FILE *f);
 int getc(FILE *f);
 int fputc(int c, FILE *f);
 int putc(int c, FILE *f);
-int ungetc(int c, FILE *stream);
+int ungetc(int c, FILE *f);
 
 int fseek(FILE *f, long offset, int whence);
 int fseeko(FILE *f, off_t offset, int whence);