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libdraw: make newwindow() unmount the old window

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newwindow() used to mount the new window directly on /dev, resulting
in the old window and the new one being mounted over each other.

we now try to unmount the old window from /dev first, mount new
window to /mnt/wsys (replacing the old) and then bind /mnt/wsys
before /dev.

if theres no /mnt/wsys, just mount window directly before /dev.
This commit is contained in:
cinap_lenrek 2013-10-04 15:57:05 +02:00
parent 40cf5957e0
commit 0be917ff4d
1 changed files with 8 additions and 3 deletions
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11
sys/src/libdraw/newwindow.c
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@ -14,14 +14,19 @@ newwindow(char *str)
if(wsys == nil)
return -1;
fd = open(wsys, ORDWR);
free(wsys);
if(fd < 0)
if(fd < 0){
free(wsys);
return -1;
}
rfork(RFNAMEG);
unmount(wsys, "/dev"); /* drop reference to old window */
free(wsys);
if(str)
snprint(buf, sizeof buf, "new %s", str);
else
strcpy(buf, "new");
return mount(fd, -1, "/dev", MBEFORE, buf);
if(mount(fd, -1, "/mnt/wsys", MREPL, buf) < 0)
return mount(fd, -1, "/dev", MBEFORE, buf);
return bind("/mnt/wsys", "/dev", MBEFORE);
}