diff --git a/include/akstdlib.h b/include/akstdlib.h
index a61c5da..a2aec1a 100644
--- a/include/akstdlib.h
+++ b/include/akstdlib.h
@@ -21,5 +21,10 @@ akerr_ErrorContext AKERR_NOIGNORE *aksl_printf(int *count, const char *restrict
 akerr_ErrorContext AKERR_NOIGNORE *aksl_fprintf(int *count, FILE *restrict stream, const char *restrict format, ...);
 akerr_ErrorContext AKERR_NOIGNORE *aksl_sprintf(int *count, char *restrict str, const char *restrict format, ...);
 
+akerr_ErrorContext AKERR_NOIGNORE *aksl_atoi(const char *nptr, int *dest);
+akerr_ErrorContext AKERR_NOIGNORE *aksl_atol(const char *nptr, long *dest);
+akerr_ErrorContext AKERR_NOIGNORE *aksl_atoll(const char *nptr, long long *dest);
+
+akerr_ErrorContext AKERR_NOIGNORE *aksl_realpath(const char *restrict path, char *restrict resolved_path);
 
 #endif
diff --git a/src/stdlib.c b/src/stdlib.c
index fcd6f4d..3d2507f 100644
--- a/src/stdlib.c
+++ b/src/stdlib.c
@@ -126,3 +126,40 @@ akerr_ErrorContext AKERR_NOIGNORE *aksl_sprintf(int *count, char *restrict str,
     FAIL_NONZERO_RETURN(e, (*count == -1), errno, "Short write");
     SUCCEED_RETURN(e);
 }
+
+akerr_ErrorContext AKERR_NOIGNORE *aksl_atoi(const char *nptr, int *dest)
+{
+    PREPARE_ERROR(e);
+    FAIL_ZERO_RETURN(e, nptr, AKERR_NULLPOINTER, "nptr=%p, dest=%p", (void *)nptr, (void *)dest);
+    FAIL_ZERO_RETURN(e, dest, AKERR_NULLPOINTER, "nptr=%p, dest=%p", (void *)nptr, (void *)dest);
+    *dest = atoi(nptr);
+    SUCCEED_RETURN(e);
+}
+
+akerr_ErrorContext AKERR_NOIGNORE *aksl_atol(const char *nptr, long *dest)
+{
+    PREPARE_ERROR(e);
+    FAIL_ZERO_RETURN(e, nptr, AKERR_NULLPOINTER, "nptr=%p, dest=%p", (void *)nptr, (void *)dest);
+    FAIL_ZERO_RETURN(e, dest, AKERR_NULLPOINTER, "nptr=%p, dest=%p", (void *)nptr, (void *)dest);
+    *dest = atol(nptr);
+    SUCCEED_RETURN(e);
+}
+
+akerr_ErrorContext AKERR_NOIGNORE *aksl_atoll(const char *nptr, long long *dest)
+{
+    PREPARE_ERROR(e);
+    FAIL_ZERO_RETURN(e, nptr, AKERR_NULLPOINTER, "nptr=%p, dest=%p", (void *)nptr, (void *)dest);
+    FAIL_ZERO_RETURN(e, dest, AKERR_NULLPOINTER, "nptr=%p, dest=%p", (void *)nptr, (void *)dest);
+    *dest = atoll(nptr);
+    SUCCEED_RETURN(e);
+}
+
+akerr_ErrorContext AKERR_NOIGNORE *aksl_realpath(const char *restrict path, char *restrict resolved_path)
+{
+    char *result = NULL;
+    PREPARE_ERROR(e);
+    FAIL_ZERO_RETURN(e, path, AKERR_NULLPOINTER, "path=%p, dest=%p", (void *)path, (void *)resolved_path);
+    result = realpath(path, resolved_path);
+    FAIL_ZERO_RETURN(e, result, errno, "Error");
+    SUCCEED_RETURN(e);
+}