updated

Makefile

@@ -7,7 +7,10 @@ DOCDIR   ?= $(PREFIX)/share/doc/sfm
 
 CXX      ?= g++
 CXXFLAGS ?= -std=c++17 -O2 -Wall -Wextra
-LDFLAGS  ?= -lncursesw
+# Pick a curses library: prefer ncursesw, fall back to ncurses, then plain
+# curses (netbsd-curses and BSD base systems provide only libcurses).
+CURSES_LIBS ?= $(shell pkg-config --libs ncursesw 2>/dev/null || pkg-config --libs ncurses 2>/dev/null || echo -lcurses)
+LDLIBS   ?= $(CURSES_LIBS)
 
 INSTALL  ?= install
 RM       ?= rm -f
@@ -17,7 +20,7 @@ RM       ?= rm -f
 all: sfm
 
 sfm: sfm.cpp
-	$(CXX) $(CXXFLAGS) -o $@ $< $(LDFLAGS)
+	$(CXX) $(CXXFLAGS) -o $@ $< $(LDLIBS)
 
 install: all
 	@echo "Installing sfm to $(DESTDIR)$(BINDIR)/sfm ..."

README

@@ -5,15 +5,16 @@ sfm - Simple File Manager
 DESCRIPTION
 -----------
 sfm is a lightweight, terminal-based file manager with a vim-inspired
-key layout. The primary version is a fast C++/ncurses binary. A portable
-POSIX sh version (sfm.sh) is also included, requiring only standard Unix
-tools (ls, awk, tput, stty, mv, cp, rm).
+key layout. The primary version is a fast C++ binary that works with
+both ncurses and netbsd-curses. A portable POSIX sh version (sfm.sh) is
+also included, requiring only standard Unix tools (ls, awk, tput, stty,
+mv, cp, rm).
  
  
 REQUIREMENTS
 ------------
 C++ version (sfm):
-- ncursesw (libncursesw)
+- A curses library: ncursesw, ncurses, or netbsd-curses (libcurses)
 - A C++17 compiler (g++ or compatible)
 
 Shell version (sfm.sh):

sfm.cpp

@@ -1,6 +1,7 @@
-// sfm - Simple File Manager in C++17 with ncurses
+// sfm - Simple File Manager in C++17 with curses
+// Works with both ncurses and netbsd-curses.
 // Rewrite of the POSIX sh original for speed and efficiency
-#include <ncurses.h>
+#include <curses.h>
 
 #include <algorithm>
 #include <cerrno>
@@ -18,6 +19,7 @@
 #include <fcntl.h>
 #include <grp.h>
 #include <pwd.h>
+#include <signal.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
 #include <unistd.h>
@@ -27,6 +29,140 @@ namespace fs = std::filesystem;
 // ─── terminal helpers ───────────────────────────────────────────────────────
 [[nodiscard]] bool can_color() { return has_colors(); }
 
+// ─── key input normalization ────────────────────────────────────────────────
+// ncurses decodes escape sequences (arrows, Home/End, ...) into KEY_* codes
+// itself. netbsd-curses returns the raw bytes (e.g. ESC [ B for the down
+// arrow), which would leak stray characters into the command handling.
+// get_key() presents KEY_* codes (or 27 for a bare ESC) on both.
+
+#ifdef NCURSES_VERSION
+
+static int get_key() { return getch(); }
+
+#else // manual escape-sequence decoding (netbsd-curses etc.)
+
+static void nap_ms(int ms) {
+    struct timespec ts;
+    ts.tv_sec  = ms / 1000;
+    ts.tv_nsec = (ms % 1000) * 1000000L;
+    ::nanosleep(&ts, nullptr);
+}
+
+static int g_pushback[32];
+static int g_pushback_n = 0;
+
+static void queue_key(int k) {
+    if (g_pushback_n < static_cast<int>(sizeof(g_pushback) / sizeof(g_pushback[0])))
+        g_pushback[g_pushback_n++] = k;
+}
+
+// seq holds the bytes after ESC; seq[0] is '[' (CSI) or 'O' (SS3).
+static int decode_escape_seq(const std::string &seq) {
+    if (seq.size() < 2) return ERR;
+    char lead = seq[0];
+    char fin  = seq.back();
+    if (lead == 'O') {
+        if (seq.size() != 2) return ERR;
+        switch (fin) {
+        case 'A': return KEY_UP;
+        case 'B': return KEY_DOWN;
+        case 'C': return KEY_RIGHT;
+        case 'D': return KEY_LEFT;
+        case 'H': return KEY_HOME;
+        case 'F': return KEY_END;
+        case 'P': case 'Q': case 'R': case 'S': return KEY_F(fin - 'P' + 1);
+        }
+        return ERR;
+    }
+    if (lead != '[') return ERR;
+    switch (fin) {
+    case 'A': return KEY_UP;
+    case 'B': return KEY_DOWN;
+    case 'C': return KEY_RIGHT;
+    case 'D': return KEY_LEFT;
+    case 'H': return KEY_HOME;
+    case 'F': return KEY_END;
+    case 'Z': return KEY_BTAB;
+    }
+    // CSI n~ : Home/Insert/Delete/End/PgUp/PgDn (single digit only; multi-
+    // digit and modified variants fall through and are swallowed).
+    if (seq.size() == 3 && fin == '~' && seq[1] >= '0' && seq[1] <= '9') {
+        switch (seq[1]) {
+        case '1': case '7': return KEY_HOME;
+        case '2': return KEY_IC;
+        case '3': return KEY_DC;
+        case '4': case '8': return KEY_END;
+        case '5': return KEY_PPAGE;
+        case '6': return KEY_NPAGE;
+        }
+    }
+    return ERR;
+}
+
+// Like getch(), but assembles raw ESC sequences into KEY_* codes. A bare ESC
+// is returned as 27 (possibly after a short wait for the rest of a sequence).
+static int get_key() {
+    if (g_pushback_n > 0) return g_pushback[--g_pushback_n];
+
+    int k = getch();
+    if (k != 27) return k;
+
+    // ESC — check whether an escape sequence follows. Real terminals send
+    // the whole sequence in one burst, so the bytes are already queued.
+    nodelay(stdscr, TRUE);
+    std::string seq;
+    int c;
+    for (int i = 0; i < 4 && seq.empty(); ++i) {
+        c = getch();
+        if (c == ERR) nap_ms(10);
+        else seq += static_cast<char>(c);
+    }
+    if (seq.empty()) { nodelay(stdscr, FALSE); return 27; }  // bare ESC
+
+    if (seq[0] == '[') {
+        // CSI: parameter/intermediate bytes, then a final byte (0x40-0x7E).
+        // The lead '[' itself is in that range, so collect at least one more.
+        for (int i = 0; i < 8; ++i) {
+            if (seq.size() >= 2 && seq.back() >= 0x40 && seq.back() <= 0x7E) break;
+            c = getch();
+            if (c == ERR) { nap_ms(10); c = getch(); }
+            if (c == ERR) break;
+            seq += static_cast<char>(c);
+        }
+    } else if (seq[0] == 'O') {
+        // SS3: exactly one final byte follows.
+        for (int i = 0; i < 4 && seq.size() < 2; ++i) {
+            c = getch();
+            if (c == ERR) { nap_ms(10); c = getch(); }
+            if (c == ERR) break;
+            seq += static_cast<char>(c);
+        }
+    }
+    nodelay(stdscr, FALSE);
+
+    int key = decode_escape_seq(seq);
+    if (key == ERR) {
+        bool complete = seq.back() >= 0x40 && seq.back() <= 0x7E;
+        if (!complete) {
+            // Truncated sequence — replay it as raw keys (ESC first).
+            for (size_t i = seq.size(); i-- > 0;)
+                queue_key(static_cast<unsigned char>(seq[i]));
+            queue_key(27);
+            return 27;
+        }
+        // Unknown but well-formed sequence (e.g. an F-key): swallow it,
+        // like curses implementations do.
+        return ERR;
+    }
+    return key;
+}
+
+// netbsd-curses never reports KEY_RESIZE; catch SIGWINCH ourselves.
+static volatile sig_atomic_t g_winch = 0;
+static void on_sigwinch(int) { g_winch = 1; }
+
+#endif // NCURSES_VERSION
+
 // Color pair indices
 enum {
     CP_DIR = 1,
@@ -42,6 +178,7 @@ enum {
     CP_OVERLAY_TITLE,
     CP_BUTTON_YES,
     CP_BUTTON_NO,
+    CP_ROOT_WARN,
 };
 
 #define ATTR_DIR            (COLOR_PAIR(CP_DIR)            | A_BOLD)
@@ -54,12 +191,13 @@ enum {
 #define ATTR_MARKER           COLOR_PAIR(CP_MARKER)
 #define ATTR_INFO             COLOR_PAIR(CP_INFO)
 #define ATTR_OVERLAY_BORDER   COLOR_PAIR(CP_OVERLAY_BORDER)
+#define ATTR_ROOT_WARN        (COLOR_PAIR(CP_ROOT_WARN) | A_BOLD)
 
 // ─── Entry data ─────────────────────────────────────────────────────────────
 enum class EntryType { Directory, File, Symlink };
 
 struct Entry {
-    std::string name;         // display name (dirs end with '/', symlinks with '@')
+    std::string name;         // display name (dirs end with '/')
     std::string full_path;    // absolute canonical path
     EntryType   type = EntryType::File;
     bool        is_hidden = false;
@@ -154,6 +292,7 @@ private:
     bool   show_details_ = false;
     bool   show_preview_ = false;
     bool   searching_    = false;
+    bool   is_root_      = false;
     std::string filter_;
     std::string info_msg_;
 
@@ -197,6 +336,9 @@ private:
                                const std::vector<std::string> &items,
                                bool allow_cancel = true);
 
+    // ── input ──────────────────────────────────────────────────────────────
+    bool handle_key(int key);  // returns false to quit
+
     // ── line input ─────────────────────────────────────────────────────────
     bool read_line(std::string &out, const std::string &prompt,
                    const std::string &initial = "");
@@ -295,6 +437,8 @@ void FileManager::restore_term() {
         curs_set(1);
         endwin();
     }
+    // Clear screen and move cursor home (visible in scrollback otherwise)
+    printf("\033[2J\033[H");
 }
 
 void FileManager::update_size() {
@@ -321,6 +465,7 @@ void FileManager::init_colors() {
     init_pair(CP_OVERLAY_TITLE,    COLOR_CYAN,    -1);
     init_pair(CP_BUTTON_YES,       COLOR_GREEN,   -1);
     init_pair(CP_BUTTON_NO,        COLOR_RED,     -1);
+    init_pair(CP_ROOT_WARN,       COLOR_RED,     -1);
 }
 
 // ─── directory loading ──────────────────────────────────────────────────────
@@ -359,7 +504,6 @@ void FileManager::load_entries() {
             e.name += '/';
         } else if (S_ISLNK(st.st_mode)) {
             e.type = EntryType::Symlink;
-            e.name += '@';
             char buf[PATH_MAX];
             ssize_t len = readlink(e.full_path.c_str(), buf, sizeof(buf) - 1);
             if (len > 0) { buf[len] = '\0'; e.symlink_target = buf; }
@@ -554,13 +698,22 @@ void FileManager::draw_botbar() {
         right = "  press ? for help ";
     }
 
-    int total = static_cast<int>(left.size() + right.size());
+    std::string root_tag = is_root_ ? "[root] " : "";
+    int total = static_cast<int>(root_tag.size() + left.size() + right.size());
     int pad   = cols_ - total;
     if (pad < 0) pad = 0;
 
+    int x = 0;
+    if (is_root_) {
+        attron(ATTR_ROOT_WARN);
+        mvprintw(rows_ - 1, 0, "%s", root_tag.c_str());
+        attroff(ATTR_ROOT_WARN);
+        x = static_cast<int>(root_tag.size());
+    }
+
     attron(ATTR_TOPBAR);
-    mvprintw(rows_ - 1, 0, "%s", left.c_str());
-    for (int i = 0; i < pad; ++i) mvaddch(rows_ - 1, static_cast<int>(left.size()) + i, ' ');
+    mvprintw(rows_ - 1, x, "%s", left.c_str());
+    for (int i = 0; i < pad; ++i) mvaddch(rows_ - 1, x + static_cast<int>(left.size()) + i, ' ');
     attroff(ATTR_TOPBAR);
 
     attron(ATTR_INFO);
@@ -711,11 +864,10 @@ void FileManager::draw_preview() {
     if (!e) return;
 
     // Draw vertical divider
-    for (int r = 1; r < rows_ - 1; ++r) {
     attron(ATTR_DIVIDER);
-        mvaddch(r, list_cols_, '|');
+    for (int r = 1; r < rows_ - 1; ++r)
+        mvaddch(r, list_cols_, ACS_VLINE);
     attroff(ATTR_DIVIDER);
-    }
 
     // Clear entire preview area of previous content (stale lines from last preview)
     for (int r = 1; r < rows_ - 1; ++r) {
@@ -932,7 +1084,7 @@ bool FileManager::confirm_overlay(const std::string &prompt) {
 
         refresh();
 
-        int ch = getch();
+        int ch = get_key();
         switch (ch) {
         case KEY_LEFT:  case 'h': sel_yes = true;  break;
         case KEY_RIGHT: case 'l': sel_yes = false; break;
@@ -943,18 +1095,7 @@ bool FileManager::confirm_overlay(const std::string &prompt) {
         case '\n': case '\r': case KEY_ENTER:
             need_full_redraw_ = true;
             return sel_yes;
-        case 27: {
-            nodelay(stdscr, TRUE);
-            int n = getch();
-            nodelay(stdscr, FALSE);
-            if (n == ERR) { need_full_redraw_ = true; return false; }
-            if (n == '[') {
-                int m = getch();
-                if (m == 'D' || m == 'C') { sel_yes = !sel_yes; break; }
-            }
-            need_full_redraw_ = true;
-            return false;
-        }
+        case 27: need_full_redraw_ = true; return false;
         default: break;
         }
     }
@@ -1053,7 +1194,7 @@ std::string FileManager::overlay_picker(const std::string &title,
 
         refresh();
 
-        int ch = getch();
+        int ch = get_key();
         switch (ch) {
         case 'j': case KEY_DOWN:  psel++; break;
         case 'k': case KEY_UP:    psel--; break;
@@ -1064,20 +1205,7 @@ std::string FileManager::overlay_picker(const std::string &title,
         case 'q': case 'Q': case 'h':
             if (allow_cancel) { need_full_redraw_ = true; return ""; }
             break;
-        case 27: {
-            nodelay(stdscr, TRUE);
-            int n = getch();
-            nodelay(stdscr, FALSE);
-            if (n == ERR) { need_full_redraw_ = true; return ""; }
-            if (n == '[') {
-                int m = getch();
-                if (m == 'A') psel--;
-                else if (m == 'B') psel++;
-                else if (m == 'D') { need_full_redraw_ = true; return ""; }
-                else { need_full_redraw_ = true; return ""; }
-            }
-            break;
-        }
+        case 27: need_full_redraw_ = true; return "";
         default: break;
         }
     }
@@ -1113,18 +1241,12 @@ bool FileManager::read_line(std::string &out, const std::string &prompt,
         move(bot, static_cast<int>(prompt.size() + pos));
         refresh();
 
-        int ch = getch();
-        if (ch == 27) { // ESC
-            nodelay(stdscr, TRUE);
-            int n = getch();
-            nodelay(stdscr, FALSE);
-            if (n == ERR) {
+        int ch = get_key();
+        if (ch == 27) { // bare ESC — cancel
             leaveok(stdscr, TRUE);
             curs_set(0);
             out.clear();
             return false;
-            }
-            continue;
         } else if (ch == '\n' || ch == '\r' || ch == KEY_ENTER) {
             leaveok(stdscr, TRUE);
             curs_set(0);
@@ -1175,8 +1297,8 @@ void FileManager::do_open() {
     if (!e) return;
 
     std::string target = join_path(cwd_, e->name);
-    // Strip trailing / for directory and @ for symlink
-    if (!target.empty() && (target.back() == '/' || target.back() == '@'))
+    // Strip trailing / for directory
+    if (!target.empty() && target.back() == '/')
         target.pop_back();
 
     switch (e->type) {
@@ -1294,20 +1416,14 @@ void FileManager::do_search() {
         need_full_redraw_ = true;
         draw();
 
-        int ch = getch();
-        if (ch == 27) { // ESC
-            nodelay(stdscr, TRUE);
-            int n = getch();
-            nodelay(stdscr, FALSE);
-            if (n == ERR) {
+        int ch = get_key();
+        if (ch == 27) {
             // Bare ESC — clear filter and exit search
             filter_.clear();
             searching_ = false;
             apply_filter();
             curs_set(0);
             need_full_redraw_ = true;
-            }
-            // else: arrow key or other sequence — ignore
         } else if (ch == '\n' || ch == '\r' || ch == KEY_ENTER) {
             searching_ = false;
             curs_set(0);
@@ -1462,13 +1578,7 @@ void FileManager::do_info() {
     refresh();
 
     // Wait for any key
-    nodelay(stdscr, FALSE);
-    int ch = getch();
-    if (ch == 27) {
-        nodelay(stdscr, TRUE);
-        getch();
-        nodelay(stdscr, FALSE);
-    }
+    get_key();
     need_full_redraw_ = true;
 }
 
@@ -1585,22 +1695,22 @@ void FileManager::do_help() {
     refresh();
 
     // Wait for any key
-    nodelay(stdscr, FALSE);
-    int ch = getch();
-    if (ch == 27) {
-        nodelay(stdscr, TRUE);
-        getch();
-        nodelay(stdscr, FALSE);
-    }
+    get_key();
     need_full_redraw_ = true;
 }
 
 void FileManager::do_rename() {
     const Entry *e = get_sel();
     if (!e) return;
-    // Strip trailing / or @
+
+    if (access(cwd_.c_str(), W_OK) != 0) {
+        flash_msg("permission denied: " + cwd_);
+        return;
+    }
+
+    // Strip trailing /
     std::string name = e->name;
-    if (!name.empty() && (name.back() == '/' || name.back() == '@'))
+    if (!name.empty() && name.back() == '/')
         name.pop_back();
 
     std::string new_name;
@@ -1612,11 +1722,16 @@ void FileManager::do_rename() {
     if (std::rename(src.c_str(), dst.c_str()) == 0) {
         load_entries();
     } else {
-        flash_msg("rename failed");
+        flash_msg("rename failed: " + std::string(std::strerror(errno)));
     }
 }
 
 void FileManager::do_mkdir() {
+    if (access(cwd_.c_str(), W_OK) != 0) {
+        flash_msg("permission denied: " + cwd_);
+        return;
+    }
+
     std::string name;
     if (!read_line(name, " Directory name: ")) { need_full_redraw_ = true; return; }
     if (name.empty()) { flash_msg("cancelled"); return; }
@@ -1625,11 +1740,16 @@ void FileManager::do_mkdir() {
     if (fs::create_directory(path)) {
         load_entries();
     } else {
-        flash_msg("mkdir failed");
+        flash_msg("mkdir failed: " + std::string(std::strerror(errno)));
     }
 }
 
 void FileManager::do_newfile() {
+    if (access(cwd_.c_str(), W_OK) != 0) {
+        flash_msg("permission denied: " + cwd_);
+        return;
+    }
+
     std::string name;
     if (!read_line(name, " File name: ")) { need_full_redraw_ = true; return; }
     if (name.empty()) { flash_msg("cancelled"); return; }
@@ -1640,22 +1760,27 @@ void FileManager::do_newfile() {
         f.close();
         load_entries();
     } else {
-        flash_msg("cannot create file");
+        flash_msg("cannot create file: " + std::string(std::strerror(errno)));
     }
 }
 
 void FileManager::do_delete() {
+    if (access(cwd_.c_str(), W_OK) != 0) {
+        flash_msg("permission denied: " + cwd_);
+        return;
+    }
+
     // Gather items to delete
     std::vector<std::string> targets;
     if (!selected_.empty()) {
         for (const auto &sel_name : selected_)
-            targets.push_back(join_path(cwd_, strip_suffix(strip_suffix(sel_name, "@"), "/")));
+            targets.push_back(join_path(cwd_, strip_suffix(sel_name, "/")));
     } else {
         const Entry *e = get_sel();
         if (!e) return;
         std::string n = e->name;
         if (!n.empty() && n.back() == '/') n.pop_back();
-        if (!n.empty() && n.back() == '@') n.pop_back();
+
         targets.push_back(join_path(cwd_, n));
     }
 
@@ -1709,9 +1834,14 @@ void FileManager::do_delete() {
 void FileManager::do_trash() {
     const Entry *e = get_sel();
     if (!e) return;
+
+    if (access(cwd_.c_str(), W_OK) != 0) {
+        flash_msg("permission denied: " + cwd_);
+        return;
+    }
+
     std::string name = e->name;
     if (!name.empty() && name.back() == '/') name.pop_back();
-    if (!name.empty() && name.back() == '@') name.pop_back();
 
     std::string src = join_path(cwd_, name);
 
@@ -1743,7 +1873,7 @@ void FileManager::do_trash() {
             sel_ = std::max(0, static_cast<int>(entries_.size()) - 2);
         load_entries();
     } else {
-        flash_msg("trash failed");
+        flash_msg("trash failed: " + std::string(std::strerror(errno)));
     }
 }
 
@@ -1758,7 +1888,6 @@ void FileManager::do_open_with() {
         return;
     }
     std::string name = e->name;
-    if (!name.empty() && name.back() == '@') name.pop_back();
     std::string target = join_path(cwd_, name);
 
     std::string prog;
@@ -1788,7 +1917,6 @@ void FileManager::do_chmod_x(bool set) {
         return;
     }
     std::string name = e->name;
-    if (!name.empty() && name.back() == '@') name.pop_back();
     std::string target = join_path(cwd_, name);
 
     struct stat st;
@@ -1805,7 +1933,7 @@ void FileManager::do_chmod_x(bool set) {
         flash_msg(set ? "chmod +x: " + e->name : "chmod -x: " + e->name);
         load_entries();
     } else {
-        flash_msg("chmod failed");
+        flash_msg("chmod failed: " + std::string(std::strerror(errno)));
     }
 }
 
@@ -1911,7 +2039,6 @@ void FileManager::do_copy_path() {
     if (!e) return;
     std::string name = e->name;
     if (!name.empty() && name.back() == '/') name.pop_back();
-    if (!name.empty() && name.back() == '@') name.pop_back();
     std::string path = join_path(cwd_, name);
 
     // Try clipboard tools
@@ -1971,7 +2098,7 @@ void FileManager::do_yank() {
         for (const auto &sel_name : selected_) {
             std::string n = sel_name;
             if (!n.empty() && n.back() == '/') n.pop_back();
-            if (!n.empty() && n.back() == '@') n.pop_back();
+    
             clipboard_paths_.push_back(join_path(cwd_, n));
         }
         clip_mode_ = ClipMode::Copy;
@@ -1982,7 +2109,7 @@ void FileManager::do_yank() {
         if (!e) return;
         std::string n = e->name;
         if (!n.empty() && n.back() == '/') n.pop_back();
-        if (!n.empty() && n.back() == '@') n.pop_back();
+
         clipboard_paths_.push_back(join_path(cwd_, n));
         clip_mode_ = ClipMode::Copy;
         flash_msg("yanked: " + e->name);
@@ -1996,7 +2123,7 @@ void FileManager::do_cut() {
         for (const auto &sel_name : selected_) {
             std::string n = sel_name;
             if (!n.empty() && n.back() == '/') n.pop_back();
-            if (!n.empty() && n.back() == '@') n.pop_back();
+    
             clipboard_paths_.push_back(join_path(cwd_, n));
         }
         clip_mode_ = ClipMode::Cut;
@@ -2007,7 +2134,7 @@ void FileManager::do_cut() {
         if (!e) return;
         std::string n = e->name;
         if (!n.empty() && n.back() == '/') n.pop_back();
-        if (!n.empty() && n.back() == '@') n.pop_back();
+
         clipboard_paths_.push_back(join_path(cwd_, n));
         clip_mode_ = ClipMode::Cut;
         flash_msg("cut: " + e->name);
@@ -2021,6 +2148,11 @@ void FileManager::do_paste() {
         return;
     }
 
+    if (access(cwd_.c_str(), W_OK) != 0) {
+        flash_msg("permission denied: " + cwd_);
+        return;
+    }
+
     for (const auto &src : clipboard_paths_) {
         std::string name = fs::path(src).filename().string();
         std::string dst  = join_path(cwd_, name);
@@ -2286,22 +2418,7 @@ void FileManager::open_file(const std::string &path) {
 }
 
 // ─── main event loop ────────────────────────────────────────────────────────
-void FileManager::run() {
-    setup_term();
-    if (can_color()) init_colors();
-    load_entries();
-
-    while (true) {
-        draw();
-        int key = getch();
-
-        // Handle terminal resize
-        if (key == KEY_RESIZE) {
-            update_size();
-            need_full_redraw_ = true;
-            continue;
-        }
-
+bool FileManager::handle_key(int key) {
     switch (key) {
     case 'j': case KEY_DOWN:
         if (!entries_.empty() && sel_ < static_cast<int>(entries_.size()) - 1)
@@ -2356,10 +2473,57 @@ void FileManager::run() {
     case 'r': do_rename(); break;
     case 'm': do_mkdir(); break;
     case 'n': do_newfile(); break;
-        case 'q': case 'Q': return;
+    case 'q': case 'Q': return false;
     case '!': do_shell(); break;
     default: break;
     }
+    return true;
+}
+
+void FileManager::run() {
+    setup_term();
+    if (can_color()) init_colors();
+    load_entries();
+
+    is_root_ = (geteuid() == 0);
+
+#ifndef NCURSES_VERSION
+    struct sigaction sa;
+    std::memset(&sa, 0, sizeof(sa));
+    sa.sa_handler = on_sigwinch;
+    sigaction(SIGWINCH, &sa, nullptr);
+#endif
+
+    draw();
+    while (true) {
+#ifndef NCURSES_VERSION
+        // netbsd-curses never delivers KEY_RESIZE; poll for SIGWINCH and
+        // re-query the terminal size ourselves.
+        if (g_winch) {
+            g_winch = 0;
+            endwin();   // endwin()+refresh() makes curses re-read the size
+            refresh();
+            need_full_redraw_ = true;
+            draw();
+        }
+        nodelay(stdscr, TRUE);
+#endif
+        int key = get_key();
+#ifndef NCURSES_VERSION
+        nodelay(stdscr, FALSE);
+        if (key == ERR) { nap_ms(20); continue; }
+#endif
+
+        // Handle terminal resize (ncurses)
+        if (key == KEY_RESIZE) {
+            update_size();
+            need_full_redraw_ = true;
+            draw();
+            continue;
+        }
+
+        if (!handle_key(key)) return;
+        draw();
     }
 }