Hi,
The appended patch allows the users of suspend to abort the image saving by
pressing Ctrl+c.
Comments welcome.
Greetings,
Rafael
---
suspend.c | 48 +++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 45 insertions(+), 3 deletions(-)
Index: suspend/suspend.c
===================================================================
--- suspend.orig/suspend.c 2006-11-01 20:55:15.000000000 +0100
+++ suspend/suspend.c 2006-11-02 07:44:53.000000000 +0100
@@ -29,6 +29,7 @@
#include <string.h>
#include <errno.h>
#include <signal.h>
+#include <termios.h>
#ifdef CONFIG_COMPRESS
#include <lzf.h>
#else
@@ -433,17 +434,41 @@ static int save_image(struct swap_map_ha
unsigned int nr_pages)
{
unsigned int m, writeout_rate;
- int ret;
+ int ret, abort_possible;
+ struct termios newtrm, savedtrm;
+ char c = 0;
int error = 0;
- printf("suspend: Saving image data pages (%u pages) ... ",
nr_pages);
+ /* Switch the state of the terminal so that we can read the keyboard
+ * without blocking and with no echo.
+ *
+ * stdin must be attached to the terminal now.
+ */
+ abort_possible = !tcgetattr(0 , &savedtrm);
+ if (abort_possible) {
+ newtrm = savedtrm;
+ newtrm.c_cc[VMIN] = 0;
+ newtrm.c_cc[VTIME] = 1;
+ newtrm.c_iflag = IGNBRK | IGNPAR | ICRNL | IMAXBEL;
+ newtrm.c_lflag = 0;
+ abort_possible = !tcsetattr(0, TCSANOW, &newtrm);
+ }
+ if (abort_possible)
+ printf("suspend: Saving %u image data pages "
+ "(press Ctrl+c to abort) ... ", nr_pages);
+ else
+ printf("suspend: Saving image data pages (%u pages) ... ",
+ nr_pages);
+
m = nr_pages / 100;
if (!m)
m = 1;
+
if (early_writeout)
writeout_rate = m;
else
writeout_rate = nr_pages;
+
nr_pages = 0;
do {
ret = read(handle->dev, handle->page_buffer, page_size);
@@ -451,20 +476,34 @@ static int save_image(struct swap_map_ha
error = swap_write_page(handle);
if (error)
break;
+
if (!(nr_pages % m)) {
printf("\b\b\b\b%3d%%", nr_pages / m);
splash.progress(20 + (nr_pages / m) * 0.75);
+ if (abort_possible) {
+ ret = read(0, &c, 1);
+ if (ret > 0 && c == 3) {
+ printf(" aborted!\n");
+ return -EINTR;
+ }
+ ret = 1;
+ }
}
if (!(nr_pages % writeout_rate))
start_writeout(handle->fd);
+
nr_pages++;
}
} while (ret > 0);
if (ret < 0)
error = -errno;
+
if (!error)
printf(" done (%u pages)\n", nr_pages);
+ if (abort_possible)
+ tcsetattr(0, TCSANOW, &savedtrm);
+
return error;
}
@@ -1295,8 +1334,11 @@ int main(int argc, char *argv[])
splash_prepare(&splash, splash_param);
- if (lock_vt() < 0)
+ if (lock_vt() < 0) {
+ ret = errno;
+ fprintf(stderr, "suspend: Could not lock the terminal\n");
goto Restore_console;
+ }
splash.progress(5);
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