From a51bf815aa1d9a64d04888b95db9d02cb27be763 Mon Sep 17 00:00:00 2001
From: fujr <fjrcn@outlook.com>
Date: Tue, 22 Oct 2024 23:34:39 +0800
Subject: [PATCH] tom_modem: fix ld error

---
 application/tom_modem/src/main.c  |  6 +++++-
 application/tom_modem/src/main.h  | 13 ++++++-------
 application/tom_modem/src/utils.c |  7 +++++--
 application/tom_modem/src/utils.h |  2 +-
 4 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/application/tom_modem/src/main.c b/application/tom_modem/src/main.c
index c74d944..bf3775a 100644
--- a/application/tom_modem/src/main.c
+++ b/application/tom_modem/src/main.c
@@ -11,8 +11,12 @@
 #include <sys/select.h>
 #include <errno.h>
 
+FILE *fdi;             // file descriptor for input
+FILE *fdo;             // file descriptor for output
+int tty_fd;            // file descriptor for tty device
 
-
+PROFILE_T s_profile;   // global profile     
+char *self_name; // program name
 void _timeout(int signo)
 {
     err_msg("Exit with Signal %d", signo);
diff --git a/application/tom_modem/src/main.h b/application/tom_modem/src/main.h
index 4182697..6a95996 100644
--- a/application/tom_modem/src/main.h
+++ b/application/tom_modem/src/main.h
@@ -14,13 +14,12 @@
 
 #define DEFAULT_TIMEOUT 3
 // 
-
-FILE *fdi;             // file descriptor for input
-FILE *fdo;             // file descriptor for output
-int tty_fd;            // file descriptor for tty device
-
-PROFILE_T s_profile;   // global profile     
-char *self_name; // program name
+extern FILE *fdi;             // file descriptor for input
+extern FILE *fdo;             // file descriptor for output
+extern int tty_fd;            // file descriptor for tty device
+extern PROFILE_T s_profile;   // global profile     
+extern char *self_name;       // program name
+extern struct termios oldtio; // old tty setting
 
 extern  int at(PROFILE_T *profile);
 
diff --git a/application/tom_modem/src/utils.c b/application/tom_modem/src/utils.c
index 9bf323e..558844a 100644
--- a/application/tom_modem/src/utils.c
+++ b/application/tom_modem/src/utils.c
@@ -1,5 +1,6 @@
 #include "utils.h"
 #include "pdu_lib/pdu.h"
+struct termios oldtio;
 
 int match_option(char *option_name)
 {
@@ -164,7 +165,8 @@ int open_tty_device(PROFILE_T *profile)
     }
     tcflush(tty_fd, TCIOFLUSH);
     atexit(clean_up);
-    close(tty_fd);
+    if (tty_fd >= 0)
+        close(tty_fd);
     tty_fd = open(profile->tty_dev, O_RDWR | O_NOCTTY);
     fdi = fdopen(tty_fd, "r");
     fdo = fdopen(tty_fd, "w");
@@ -305,7 +307,8 @@ static void clean_up()
     }
     dbg_msg("Clean up success");
     tcflush(tty_fd, TCIOFLUSH);
-    close(tty_fd);
+    // if (tty_fd >= 0)
+    //     close(tty_fd);
 }
 
 static void escape_json(char *input, char *output)
diff --git a/application/tom_modem/src/utils.h b/application/tom_modem/src/utils.h
index d93a2c7..8758c1b 100644
--- a/application/tom_modem/src/utils.h
+++ b/application/tom_modem/src/utils.h
@@ -9,7 +9,7 @@ extern PROFILE_T s_profile;
 extern FILE *fdi;             // file descriptor for input
 extern FILE *fdo;             // file descriptor for output
 extern int tty_fd;            // file descriptor for tty device
-struct termios oldtio; // old tty setting
+extern struct termios oldtio; // old tty setting