From 38a330770c881c026ffcd409ff43cc55f4ab739a Mon Sep 17 00:00:00 2001
From: Chris Allegretta <chrisa@asty.org>
Date: Sun, 20 Jun 2004 01:13:57 +0000
Subject: [PATCH] code to disable sigwinch handler to stop suspend segfault or
 stopping in the middle of a file read/write

git-svn-id: svn://svn.savannah.gnu.org/nano/branches/nano_1_2_branch/nano@1811 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
---
 ChangeLog |  9 +++++++++
 files.c   | 14 ++++++++++++++
 global.c  |  1 +
 nano.c    | 17 +++++++++++++++++
 proto.h   |  1 +
 5 files changed, 42 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 326c70a2..10ca6d7b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,10 +1,19 @@
 CVS code -
 - General:
 	- Translation updates (see po/ChangeLog for details).
+	- Don't run handle_sigwinch() handler if we're reading in
+	  or writing out a file.   Global variable jumpok controls
+	  when to not run the winch handles, static resizepending
+	  is set, handler in main to run handle_sigwinch() when set.
+	  Should fix segfaults when nano is initially suspended while 
+	  reading in a file.
+	*** FIXME: WHo t credit fo finding this bug?
 - nano.c:
   main()
 	- Don't call open_file with quiet flag set.  Fixes Debian bug 
 	  #246956 (no warning when trying to open non-readable file).
+	- Add an extra titlebar() call (useful when reading in a big 
+	  file).
 
 GNU nano 1.2.3 - 2004.01.17
 - General:
diff --git a/files.c b/files.c
index ae436734..43fe0fb7 100644
--- a/files.c
+++ b/files.c
@@ -165,6 +165,10 @@ int read_file(FILE *f, const char *filename, int quiet)
     int line1ins = 0;
     int input_int;
 
+#ifndef NANO_SMALL
+    jumpok = 0;
+#endif
+
     buf = charalloc(bufx);
     buf[0] = '\0';
 
@@ -334,6 +338,9 @@ int read_file(FILE *f, const char *filename, int quiet)
 
     totlines += num_lines;
 
+#ifndef NANO_SMALL
+    jumpok = 1;
+#endif
     return 1;
 }
 
@@ -1346,6 +1353,7 @@ int write_file(const char *name, int tmp, int append, int nonamechange)
 	statusbar(_("Cancelled"));
 	return -1;
     }
+
     if (!tmp)
 	titlebar(NULL);
     fileptr = fileage;
@@ -1487,6 +1495,9 @@ int write_file(const char *name, int tmp, int append, int nonamechange)
 #ifdef DEBUG
     dump_buffer(fileage);
 #endif
+#ifndef NANO_SMALL
+    jumpok = 0;
+#endif
 
     f = fdopen(fd, append == 1 ? "ab" : "wb");
     if (f == NULL) {
@@ -1698,6 +1709,9 @@ int write_file(const char *name, int tmp, int append, int nonamechange)
   cleanup_and_exit:
     free(realname);
     free(buf);
+#ifndef NANO_SMALL
+    jumpok = 1;
+#endif
     return retval;
 }
 
diff --git a/global.c b/global.c
index 6c6ed4af..b9914d7d 100644
--- a/global.c
+++ b/global.c
@@ -44,6 +44,7 @@ char *filename = NULL;		/* Name of the file */
 
 #ifndef NANO_SMALL
 struct stat originalfilestat;	/* Stat for the file as we loaded it */
+int jumpok = 0;			/* Okay to longjmp back to main loop */
 #endif
 
 int editwinrows = 0;		/* How many rows long is the edit
diff --git a/nano.c b/nano.c
index 813304fd..b97fccad 100644
--- a/nano.c
+++ b/nano.c
@@ -63,6 +63,10 @@ static struct sigaction act;	/* For all our fun signal handlers */
 
 static sigjmp_buf jmpbuf;	/* Used to return to mainloop after SIGWINCH */
 
+#ifndef NANO_SMALL
+static int resizepending = 0;	/* Got a resize request while reading data */
+#endif
+
 /* What we do when we're all set to exit */
 RETSIGTYPE finish(int sigage)
 {
@@ -2849,6 +2853,11 @@ void handle_sigwinch(int s)
     int result = 0;
     struct winsize win;
 
+    if (!jumpok) {
+	resizepending = 1;
+	return;
+    }
+
     if (tty == NULL)
 	return;
     fd = open(tty, O_RDWR);
@@ -3445,6 +3454,14 @@ int main(int argc, char *argv[])
     /* Return here after a sigwinch */
     sigsetjmp(jmpbuf, 1);
 
+#ifndef NANO_SMALL
+    jumpok = 1;
+    if (resizepending) {
+	resizepending = 0;
+	handle_sigwinch(0);
+    }
+#endif
+
     /* SHUT UP GCC! */
     startline = 0;
     fill_flag_used = 0;
diff --git a/proto.h b/proto.h
index eeafe73c..2bdc39f8 100644
--- a/proto.h
+++ b/proto.h
@@ -116,6 +116,7 @@ extern regmatch_t synfilematches[1];
 
 #ifndef NANO_SMALL
 extern toggle *toggles;
+extern int jumpok;
 #endif
 
 #ifndef NANO_SMALL
-- 
2.39.5