savannah: VFS optimization request

[slavazanko]

Original: ​http://savannah.gnu.org/bugs/?8136

Submitted by:	None	Submitted on:	Fri 12 Mar 2004 11:00:45 PM UTC
Category:	VFS	Severity:	3 - Normal
Status:	None	Privacy:	Public
Assigned to:	None	Open/Closed:	Open
Release:	4.6.0	Operating System:	GNU/Linux

Discussion:

Sat 13 Mar 2004 06:40:31 PM UTC, comment #2:

Here is the better patch, it also consider current cursor position.

P.S.
"return 0" in background operation instead of "goto glean_up" isn't a bug?..

--- mc-4.6.0/src/file.c 2002-12-26 22:04:10.000000000 +0300
+++ mc-4.6.0.patched/src/file.c 2004-03-12 21:22:17.000000000 +0300
@@ -1895,4 +1895,30 @@
}
}
+
+ /*
+ * Dmitry Koteroff <d[at]koteroff.ru>
+ * Patch to save selected items in environment variable.
+ * This variable would be passed to extfs scripts and may be used
+ * to optimize depacking performance.
+ */
+ {{{{
+ char* env = g_strconcat("", NULL);
+ for (i = 0; i < panel->count; i++) {
+ char prevEnv, p;
+ if (!panel->dir.list[i].f.marked) continue;
+ p = concat_dir_and_file (panel->cwd, panel->dir.list[i].fname);
+ prevEnv = env;
+ env = g_strconcat(prevEnv, p, "\n", NULL);
+ g_free(p);
+ g_free(prevEnv);
+ }
+ setenv("MC_SELECTION", env, 1);
+ g_free(env);
+ char *cur = concat_dir_and_file (panel->cwd, source);
+ setenv("MC_CURRENT", cur, 1);
+ g_free(cur);
+ }}}}
+
+
#ifdef WITH_BACKGROUND
/* Did the user select to do a background operation? */
@@ -1913,4 +1939,5 @@
mc_setctl (dest, MCCTL_FORGET_ABOUT, NULL);
/* file_op_context_destroy (ctx); */
+ setenv("MC_SELECTION", "", 1); setenv("MC_CURRENT", "", 1);
return 0;
}
@@ -2123,4 +2150,5 @@
} /* Many files */
clean_up:
+ setenv("MC_SELECTION", "", 1); setenv("MC_CURRENT", "", 1);
/* Clean up */
	Anonymous
Sat 13 Mar 2004 12:19:29 AM UTC, comment #1:

Here is a simple patch (also attached). Hope you will apply it in
next release.

--- mc-4.6.1-pre1/src/file.c 2003-10-27 20:36:19.000000000 +0300
+++ mc-4.6.1-pre1.patched/src/file.c 2004-03-12 03:13:05.000000000 +0300
@@ -1865,4 +1865,27 @@
}
}
+
+ /*
+ * Dmitry Koteroff <d[at]koteroff.ru>
+ * Patch to save selected items in environment variable.
+ * This variable would be passed to extfs scripts and may be used
+ * to optimize depacking performance.
+ */
+ {{{{
+ char* env = g_strconcat("", NULL);
+ for (i = 0; i < panel->count; i++) {
+ char prevEnv, p;
+ if (!panel->dir.list[i].f.marked) continue;
+ p = concat_dir_and_file (panel->cwd, panel->dir.list[i].fname);
+ prevEnv = env;
+ env = g_strconcat(prevEnv, p, "\n", NULL);
+ g_free(p);
+ g_free(prevEnv);
+ }
+ setenv("MC_SELECTION", env, 1);
+ g_free(env);
+ }}}}
+
+
#ifdef WITH_BACKGROUND
/* Did the user select to do a background operation? */
	Anonymous
Fri 12 Mar 2004 11:00:45 PM UTC, original submission:

Not a bug, but feature request.

I am using VFS (extfs). I have written program (backup extractor) 
which handle "copyout" and "list" commands from mc. But if I want to
 copyout a whole directory (or a lot of files from archive), it is 
called FOR EACH extracted file. In my case, extractor (duplicity 
backupper, http://www.nongnu.org/duplicity/ ) starts very long time.
 But it can extract whole directory quickly.

I think if mc would pass to extfs script environment variable 
containing names of ALL the selected files (AND DIRECTORIES) on the 
panel before extracting, it would get ability to optimize extract 
script. For example, I can fully extract all needed files in 
temporary directory by ONE call to duplicity, and then just copy 
these files from temp directory to pathes needed by mc.