LibC: Support _PC_PATH_MAX in [f]pathconf

Libraries/LibC/unistd.cpp

@@ -413,6 +413,12 @@ long fpathconf(int fd, int name)
 {
     (void)fd;
     (void)name;
+
+    switch (name) {
+    case _PC_PATH_MAX:
+        return PATH_MAX;
+    }
+
     ASSERT_NOT_REACHED();
 }
 
@@ -420,6 +426,12 @@ long pathconf(const char* path, int name)
 {
     (void)path;
     (void)name;
+
+    switch (name) {
+    case _PC_PATH_MAX:
+        return PATH_MAX;
+    }
+
     ASSERT_NOT_REACHED();
 }
 

Libraries/LibC/unistd.h

@@ -107,6 +107,7 @@ char* realpath(const char* pathname, char* buffer);
 
 enum {
     _PC_NAME_MAX,
+    _PC_PATH_MAX,
 };
 
 #define HOST_NAME_MAX 64