libc: Add gai_strerror

1 files changed, 36 insertions, 0 deletions

diff --git a/userland/libc/netdb/gai_strerror.c b/userland/libc/netdb/gai_strerror.c
new file mode 100644
index 0000000..81457cb
--- /dev/null
+++ b/userland/libc/netdb/gai_strerror.c
@@ -0,0 +1,36 @@
+#include <assert.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+
+const char *gai_strerror(int errcode) {
+  switch (errcode) {
+  case EAI_AGAIN:
+    return "The name could not be resolved at this time. Future attempts may "
+           "succeed.";
+  case EAI_BADFLAGS:
+    return "The flags had an invalid value.";
+  case EAI_FAIL:
+    return "A non-recoverable error occurred.";
+  case EAI_FAMILY:
+    return "The address family was not recognized or the address length was "
+           "invalid for the specified family.";
+  case EAI_MEMORY:
+    return "There was a memory allocation failure.";
+  case EAI_NONAME:
+    return "The name does not resolve for the supplied parameters. NI_NAMEREQD "
+           "is set and the host's name cannot be located, or both nodename and "
+           "servname were null.";
+  case EAI_SERVICE:
+    return "The service passed was not recognized for the specified socket "
+           "type.";
+  case EAI_SOCKTYPE:
+    return "The intended socket type was not recognized.";
+  case EAI_SYSTEM:
+    return "A system error occurred. The error code can be found in errno.";
+  case EAI_OVERFLOW:
+    return "An argument buffer overflowed.";
+  default:
+    return "Invalid gai error code, no error string found.";
+  }
+}