feat(hurd): add *_max sample fix.

1 files changed, 63 insertions, 0 deletions

diff --git a/hurd/path_max.c b/hurd/path_max.c
new file mode 100644
index 0000000..eee777c
--- /dev/null
+++ b/hurd/path_max.c
@@ -0,0 +1,63 @@
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+static inline char *xreadlink(const char *restrict path) {
+  char *buffer;
+  size_t allocated = 128;
+  ssize_t len;
+
+  while (1) {
+    buffer = (char *)malloc(allocated);
+    if (!buffer) {
+      return NULL;
+    }
+    len = readlink(path, buffer, allocated);
+    if (len < (ssize_t)allocated) {
+      return buffer;
+    }
+    free(buffer);
+    if (len >= (ssize_t)allocated) {
+      allocated *= 2;
+      continue;
+    }
+    return NULL;
+  }
+}
+
+static inline char *xgethostname() {
+  long max_host_name;
+  char *buffer;
+
+  max_host_name = sysconf(_SC_HOST_NAME_MAX);
+  buffer = malloc(max_host_name + 1);
+
+  if (gethostname(buffer, max_host_name + 1)) {
+    free(buffer);
+    return NULL;
+  }
+
+  buffer[max_host_name] = '\0';
+  return buffer;
+}
+
+static inline char *xgetcwd() {
+  char *buffer;
+  size_t allocated = 128;
+
+  while (1) {
+    buffer = (char *)malloc(allocated);
+    if (!buffer) {
+      return NULL;
+    }
+    getcwd(buffer, allocated);
+    if (buffer)
+      return buffer;
+    free(buffer);
+    if (errno == ERANGE) {
+      allocated *= 2;
+      continue;
+    }
+    return NULL;
+  }
+}