initial check-in, version 0.5.0v0.5.0

1 files changed, 46 insertions, 0 deletions

diff --git a/src/passwd/getpw_r.c b/src/passwd/getpw_r.c
new file mode 100644
index 00000000..7b331e8a
--- /dev/null
+++ b/src/passwd/getpw_r.c
@@ -0,0 +1,46 @@
+#include "pwf.h"
+
+#define FIX(x) (pw->pw_##x = pw->pw_##x-line+buf)
+
+static int getpw_r(const char *name, uid_t uid, struct passwd *pw, char *buf, size_t size, struct passwd **res)
+{
+	FILE *f;
+	char *line = 0;
+	size_t len = 0;
+	int rv = 0;
+
+	f = fopen("/etc/passwd", "rb");
+	if (!f) return errno;
+
+	*res = 0;
+	while (__getpwent_a(f, pw, &line, &len)) {
+		if (name && !strcmp(name, pw->pw_name)
+		|| !name && pw->pw_uid == uid) {
+			if (size < len) {
+				rv = ERANGE;
+				break;
+			}
+			*res = pw;
+			memcpy(buf, line, len);
+			FIX(name);
+			FIX(passwd);
+			FIX(gecos);
+			FIX(dir);
+			FIX(shell);
+			break;
+		}
+	}
+ 	free(line);
+	fclose(f);
+	return rv;
+}
+
+int getpwnam_r(const char *name, struct passwd *pw, char *buf, size_t size, struct passwd **res)
+{
+	return getpw_r(name, 0, pw, buf, size, res);
+}
+
+int getpwuid_r(uid_t uid, struct passwd *pw, char *buf, size_t size, struct passwd **res)
+{
+	return getpw_r(0, uid, pw, buf, size, res);
+}