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Handle new /sys/block/.../stat format for linux >= 2.6.25.

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Closes #539360.

svn path=/branches/gnome-2-22/; revision=2754
This commit is contained in:
Benoît Dejean
2008-06-22 09:20:59 +00:00
parent 2ec06b3d60
commit 41df52e5c4
1 changed files with 36 additions and 4 deletions
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40
sysdeps/linux/fsusage.c
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@@ -59,9 +59,35 @@ get_partition(const char *mountpoint)
}
/*
Bug #539360.
/sys/.../stat format is partially defined in
linux/Documentation/block/stat.txt (looks outdated). Before linux
2.5.25, /sys/block/%s/stat and /sys/block/%s/%s/stat were not the
same, but the following commit changed the latter to have the same
format and broke compatibility.
Commit 34e8beac92c27d292938065f8375842d2840767c
Author: Jerome Marchand <jmarchan@redhat.com>
Date: Fri Feb 8 11:04:55 2008 +0100
Enhanced partition statistics: sysfs
Reports enhanced partition statistics in sysfs.
Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
fs/partitions/check.c | 22 +++++++++++++++++++---
1 files changed, 19 insertions(+), 3 deletions(-)
*/
static void
get_sys_path(const char *device, char **stat_path, const char **parse_format)
get_sys_path(glibtop* server, const char *device, char **stat_path, const char **parse_format)
{
const char* linux_2_6_25_format = "%*llu %*llu %llu %*llu"
"%*llu %*llu %llu %*llu";
if(g_str_has_prefix(device, "hd") || g_str_has_prefix(device, "sd"))
{
char *prefix;
@@ -79,12 +105,18 @@ get_sys_path(const char *device, char **stat_path, const char **parse_format)
g_free(prefix);
*stat_path = path;
*parse_format = "%*llu %llu %*llu %llu";
if (server->os_version_code < LINUX_VERSION_CODE(2, 6, 25))
*parse_format = "%*llu %llu %*llu %llu";
else
*parse_format = linux_2_6_25_format;
}
else
{
*stat_path = g_strdup_printf("/sys/block/%s/stat", device);
*parse_format = "%*llu %*llu %llu %*llu %*llu %*llu %llu";
if (server->os_version_code < LINUX_VERSION_CODE(2, 6, 25))
*parse_format = "%*llu %*llu %llu %*llu %*llu %*llu %llu";
else
*parse_format = linux_2_6_25_format;
}
}
@@ -101,7 +133,7 @@ static void linux_2_6_0(glibtop *server, glibtop_fsusage *buf, const char *path)
device = get_partition(path);
if(!device) return;
get_sys_path(device, &filename, &format);
get_sys_path(server, device, &filename, &format);
g_free(device);
ret = try_file_to_buffer(buffer, sizeof buffer, filename);