lib: Add mlibc

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 76 insertions, 0 deletions

diff --git a/lib/mlibc/sysdeps/ironclad/generic/utmpx.cpp b/lib/mlibc/sysdeps/ironclad/generic/utmpx.cpp
new file mode 100644
index 0000000..ec74e22
--- /dev/null
+++ b/lib/mlibc/sysdeps/ironclad/generic/utmpx.cpp
@@ -0,0 +1,76 @@
+#include <bits/ensure.h>
+#include <stddef.h>
+#include <errno.h>
+#include <utmpx.h>
+#include <stdio.h>
+#include <time.h>
+#include <paths.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+int utmpx_file = -1;
+
+void updwtmpx(const char *, const struct utmpx *) {
+	// Empty as musl does
+}
+
+void endutxent(void) {
+	if (utmpx_file >= 0) {
+		close(utmpx_file);
+	}
+}
+
+void setutxent(void) {
+	if (utmpx_file < 0) {
+		utmpx_file = open(UTMPX_FILE, O_RDWR | O_CREAT, 0755);
+	} else {
+		lseek(utmpx_file, 0, SEEK_SET);
+	}
+}
+
+struct utmpx returned;
+
+struct utmpx *getutxent(void) {
+	if (utmpx_file < 0) {
+		setutxent();
+		if (utmpx_file < 0) {
+			return NULL;
+		}
+	}
+
+	if (read(utmpx_file, &returned, sizeof(struct utmpx)) != sizeof(struct utmpx)) {
+		return NULL;
+	}
+
+	return &returned;
+}
+
+struct utmpx *pututxline(const struct utmpx *added) {
+	if (utmpx_file < 0) {
+		setutxent();
+		if (utmpx_file < 0) {
+			return NULL;
+		}
+	}
+
+	lseek(utmpx_file, 0, SEEK_END);
+	if (write(utmpx_file, added, sizeof(struct utmpx)) != sizeof(struct utmpx)) {
+		return NULL;
+	}
+
+	return (struct utmpx *)added;
+}
+
+int utmpxname(const char *path) {
+	if (utmpx_file > 0) {
+		close(utmpx_file);
+	}
+
+	utmpx_file = open(path, O_RDWR | O_CREAT, 0755);
+	if (utmpx_file > 0) {
+		lseek(utmpx_file, 0, SEEK_END);
+		return 1;
+	} else {
+		return 0;
+	}
+}