From fe423ed2794273445ad51332d08b19155bcbc3e8 Mon Sep 17 00:00:00 2001
From: verdant <im@verdant.ee>
Date: Tue, 28 Jul 2026 14:46:43 +0800
Subject: Implement open with editor

Fork a child process to run the text editor. If the "EDITOR" envrionment
variable is not set, fallback to "vi".
---
 fm.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

(limited to 'fm.c')

diff --git a/fm.c b/fm.c
index 17d0b7f..1d1302c 100644
--- a/fm.c
+++ b/fm.c
@@ -6,6 +6,7 @@
 #include "wm.h"
 #include <curses.h>
 #include <dirent.h>
+#include <errno.h>
 #include <libgen.h>
 #include <linux/limits.h>
 #include <magic.h>
@@ -14,9 +15,12 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/types.h>
+#include <sys/wait.h>
 #include <unistd.h>
 
 static magic_t g_magic_ctx = NULL;
+static char *const utils[] = {"vi", "xdg-open"};
+static char *const envs[] = {"SHELL", "EDITOR", "SF"};
 bool need_redraw = true;
 
 /* Function forward declarations */
@@ -24,6 +28,9 @@ static fm_info *fm_w_init(terminal *term);
 static void fm_file_list_init(file_list *l, int cap);
 static void fm_file_items_realloc(file_list *l);
 static char *detect_file_type(const char *filepath);
+static void fm_getenv(void);
+static char *xgetenv(const char *const name, char *fallback);
+int open_with_editor(char **argv);
 bool fm_preview_file(window *w, const char *path);
 
 /* Functions */
@@ -119,6 +126,7 @@ static void fm_file_list_init(file_list *l, int cap)
 	l->items = xmalloc(sizeof(file_item) * cap);
 	l->items->is_dir = 0;
 	memset(l->items, 0, l->cap * sizeof(file_item));
+	fm_getenv();
 }
 
 fm_info *fm_init(terminal *t)
@@ -334,3 +342,40 @@ void magic_cleanup(void)
 	if (g_magic_ctx)
 		magic_close(g_magic_ctx);
 }
+static char *xgetenv(const char *const name, char *fallback)
+{
+	char *value = getenv(name);
+
+	return value && value[0] ? value : fallback;
+}
+
+static void fm_getenv(void)
+{
+	enveditor = xgetenv(envs[ENV_EDITOR], utils[UTIL_VI]);
+}
+
+int open_with_editor(char **argv)
+{
+	pid_t pid;
+	def_prog_mode();
+	endwin();
+
+	if (!argv[0] || *argv[0] == '\0') {
+		argv[0] = utils[UTIL_VI];
+	}
+
+	if ((pid = fork()) < 0) {
+		log_write(LOG_ERR, "fork error");
+		return -1;
+	} else if (pid == 0) {
+		if (execvp(argv[0], argv) < 0) {
+			log_write(LOG_ERR, "execvp error");
+			return -1;
+		}
+	} else {
+		wait(NULL);
+		need_redraw = true;
+	}
+
+	return 0;
+}
-- 
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