From f7c99dfcbee03d77dd2bde2d3e17efac00bf18e6 Mon Sep 17 00:00:00 2001
From: Mark <alnyan@airmail.cc>
Date: Mon, 24 Aug 2020 11:37:36 +0300
Subject: [PATCH] ***: add various stub functions for binutils

---
 include/fcntl.h       |  2 ++
 include/sys/stat.h    |  2 ++
 src/fcntl/fcntl.c     |  9 +++++++++
 src/stdio/atof.c      |  7 +++++++
 src/stdlib/mbstowcs.c |  9 +++++++++
 src/sys/stat/umask.c  |  7 +++++++
 src/unistd/sysconf.c  | 12 +++++++++---
 7 files changed, 45 insertions(+), 3 deletions(-)
 create mode 100644 src/fcntl/fcntl.c
 create mode 100644 src/stdio/atof.c
 create mode 100644 src/stdlib/mbstowcs.c
 create mode 100644 src/sys/stat/umask.c

diff --git a/include/fcntl.h b/include/fcntl.h
index f84ba19..d890cc6 100644
--- a/include/fcntl.h
+++ b/include/fcntl.h
@@ -4,3 +4,5 @@
 
 int open(const char *pathname, int flags, ...);
 int openat(int dfd, const char *pathname, int flags, mode_t mode);
+
+int fcntl(int fd, int cmd, ...);
diff --git a/include/sys/stat.h b/include/sys/stat.h
index 23cab50..229e94f 100644
--- a/include/sys/stat.h
+++ b/include/sys/stat.h
@@ -8,6 +8,8 @@ int lstat(const char *restrict path, struct stat *restrict buf);
 int fstat(int fd, struct stat *st);
 int fstatat(int dfd, const char *restrict path, struct stat *restrict buf, int flags);
 
+mode_t umask(mode_t cmask);
+
 int mkdir(const char *path, mode_t mode);
 int mkdirat(int fd, const char *path, mode_t mode);
 int chmod(const char *pathname, mode_t mode);
diff --git a/src/fcntl/fcntl.c b/src/fcntl/fcntl.c
new file mode 100644
index 0000000..f6eba17
--- /dev/null
+++ b/src/fcntl/fcntl.c
@@ -0,0 +1,9 @@
+#include <assert.h>
+#include <fcntl.h>
+
+int fcntl(int fd, int cmd, ...) {
+    return 0;
+    (void) fd;
+    (void) cmd;
+    assert(0 && "Not implemented yet");
+}
diff --git a/src/stdio/atof.c b/src/stdio/atof.c
new file mode 100644
index 0000000..485a18d
--- /dev/null
+++ b/src/stdio/atof.c
@@ -0,0 +1,7 @@
+#include <stdlib.h>
+
+double atof(const char *str) {
+    (void) str;
+    // TODO
+    return 0.0;
+}
diff --git a/src/stdlib/mbstowcs.c b/src/stdlib/mbstowcs.c
new file mode 100644
index 0000000..4f4201d
--- /dev/null
+++ b/src/stdlib/mbstowcs.c
@@ -0,0 +1,9 @@
+#include <stdlib.h>
+#include <assert.h>
+
+size_t mbstowcs(wchar_t *dest, const char *src, size_t n) {
+    (void) dest;
+    (void) src;
+    (void) n;
+    assert(0 && "Not implemented yet\n");
+}
diff --git a/src/sys/stat/umask.c b/src/sys/stat/umask.c
new file mode 100644
index 0000000..6c77d19
--- /dev/null
+++ b/src/sys/stat/umask.c
@@ -0,0 +1,7 @@
+#include <sys/stat.h>
+#include <assert.h>
+
+mode_t umask(mode_t cmask) {
+    (void) cmask;
+    assert(0 && "Not implemented yet");
+}
diff --git a/src/unistd/sysconf.c b/src/unistd/sysconf.c
index 1d7bcc6..0bc37f3 100644
--- a/src/unistd/sysconf.c
+++ b/src/unistd/sysconf.c
@@ -1,7 +1,13 @@
 #include <unistd.h>
-#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
 
 long sysconf(int name) {
-    (void) name;
-    assert(0 && "Not implemented");
+    switch (name) {
+    case _SC_OPEN_MAX:
+        return 16;
+    default:
+        fprintf(stderr, "Unknown sysconf(): %d\n", name);
+        abort();
+    }
 }