unsigned long getLinuxVersionCode()
{
struct utsname uts;
// cleared in case sscanf() < 3
unsigned x = 0;
unsigned y = 0;
unsigned z = 0;
// failure most likely implies impending death
if(uname(&uts) == -1)
{
logError("uname() failed [%d]\n", __LINE__);
}
if(sscanf(uts.release, "%u.%u.%u", &x, &y, &z) < 3)
{
logWarning(
"Non-standard uts for running kernel:\nrelease %s=%u.%u.%u gives version code %d\n",
uts.release, x, y, z, LINUX_VERSION_CODE(x,y,z)
);
}
if(LINUX_VERSION_CODE(x, y, z) >= LINUX_VERSION_CODE(2, 6, 0) && !hasSysFS())
{
logWarning("You're running a 2.6 kernel without /sys. You should mount it [%d]\n", __LINE__);
}
return LINUX_VERSION_CODE(x, y, z);
}
void
glibtop_get_proc_io_s (glibtop *server, glibtop_proc_io *buf, pid_t pid)
{
char buffer [BUFSIZ], *p;
memset (buf, 0, sizeof (glibtop_proc_io));
if (server->os_version_code < LINUX_VERSION_CODE(2, 6, 20))
return;
if (proc_file_to_buffer(buffer, sizeof buffer, "/proc/%d/io", pid))
return;
p = skip_token (buffer);
buf->disk_rchar = g_ascii_strtoull (p, &p, 10);
p = skip_line (p);
p = skip_token (p);
buf->disk_wchar = g_ascii_strtoull (p, &p, 10);
p = skip_line (p);
p = skip_line (p);
p = skip_line (p);
p = skip_token (p);
buf->disk_rbytes = g_ascii_strtoull (p, &p, 10);
p = skip_line (p);
p = skip_token (p);
buf->disk_wbytes = g_ascii_strtoull (p, &p, 10);
buf->flags = _glibtop_sysdeps_proc_io;
}
static int
set_linux_version ()
{
struct utsname uts;
unsigned x = 0, y = 0, z = 0;
if (uname (&uts) == -1) /* failure most likely implies impending death */
return -1;
sscanf (uts.release, "%u.%u.%u", &x, &y, &z);
if (LINUX_VERSION_CODE (x, y, z) >= LINUX_VERSION_CODE (2, 6, 0)
&& !has_sysfs ())
return -1;
os_version_code = LINUX_VERSION_CODE (x, y, z);
return 0;
}
void get_cpu (dbgov_cpu * buf)
{
char buffer[BUFSIZ], *p;
memset (buf, 0, sizeof (dbgov_cpu));
int res = try_file_to_buffer (buffer, FILENAME);
if (res == TRY_FILE_TO_BUFFER_OK_IOSTAT)
{
p = skip_token (buffer);
buf->user = strtoull (p, &p, 0);
buf->nice = strtoull (p, &p, 0);
buf->sys = strtoull (p, &p, 0);
buf->idle = strtoull (p, &p, 0);
buf->total = buf->user + buf->nice + buf->sys + buf->idle;
/* 2.6 kernel */
if (os_version_code >= LINUX_VERSION_CODE (2, 6, 0))
{
buf->iowait = strtoull (p, &p, 0);
buf->irq = strtoull (p, &p, 0);
buf->softirq = strtoull (p, &p, 0);
buf->total += buf->iowait + buf->irq + buf->softirq;
}
buf->frequency = 100;
}
}
/**
* XXX: IMPORTANt - result will show in Kb
*/
void getSwapUsage(monita_swap* buf)
{
char buffer [BUFSIZ];
char* p;
memset(buf, 0, sizeof (monita_swap));
fileToBuffer(buffer, sizeof buffer, MEMINFO);
// XXX: IMPORTANT - Kernel 2.6 with multiple lines
buf->total = getScaled(buffer, "SwapTotal:");
buf->free = getScaled(buffer, "SwapFree:");
buf->cached = getScaled(buffer, "Cached:");
buf->used = buf->total - buf->free;
unsigned long osVersionCode = getLinuxVersionCode();
if(osVersionCode >= LINUX_VERSION_CODE(2, 6, 0))
{
fileToBuffer(buffer, sizeof buffer, PROC_VMSTAT);
p = strstr(buffer, "\npswpin");
if(p)
{
p = skipToken(p);
buf->pagein = strtoull(p, &p, 0);
p = skipToken(p);
buf->pageout = strtoull(p, &p, 0);
}
}
else // Linux 2.4
{
fileToBuffer(buffer, sizeof buffer, PROC_STAT);
p = strstr(buffer, "\nswap");
if(p)
{
p = skipToken(p);
buf->pagein = strtoull(p, &p, 0);
buf->pageout = strtoull(p, &p, 0);
}
}
}
void
glibtop_get_proc_uid_s (glibtop *server, glibtop_proc_uid *buf, pid_t pid)
{
char buffer [BUFSIZ], *p;
memset (buf, 0, sizeof (glibtop_proc_uid));
if (proc_status_to_buffer(buffer, sizeof buffer, pid))
return;
/* Search substring 'Pid:' */
p = strstr (buffer, "\nPid:");
if (!p) return;
p = skip_token (p); /* "Pid:" */
buf->pid = strtol (p, &p, 0);
p = skip_token (p); /* "PPid:" */
buf->ppid = strtol (p, &p, 0);
/* Maybe future Linux versions place something between
* "PPid" and "Uid", so we catch this here. */
p = strstr (p, "\nUid:");
if (!p) return;
p = skip_token (p); /* "Uid:" */
buf->uid = strtol (p, &p, 0);
buf->euid = strtol (p, &p, 0);
/* We don't know how many entries on the "Uid:" line
* future Linux version will have, so we catch this here. */
p = strstr (p, "\nGid:");
if (!p) return;
p = skip_token (p); /* "Gid:" */
buf->gid = strtol (p, &p, 0);
buf->egid = strtol (p, &p, 0);
buf->flags = _glibtop_sysdeps_proc_uid;
if (proc_stat_to_buffer(buffer, sizeof buffer, pid))
return;
p = proc_stat_after_cmd (buffer);
if (!p) return;
p = skip_multiple_token (p, 2);
buf->pgrp = strtol (p, &p, 0);
buf->session = strtol (p, &p, 0);
buf->tty = strtol (p, &p, 0);
buf->tpgid = strtol (p, &p, 0);
p = skip_multiple_token (p, 9);
buf->priority = strtol (p, &p, 0);
buf->nice = strtol (p, &p, 0);
if (buf->tty == 0)
/* the old notty val, update elsewhere bef. moving to 0 */
buf->tty = -1;
if (server->os_version_code < LINUX_VERSION_CODE(1,3,39)) {
/* map old meanings to new */
buf->priority = 2*15 - buf->priority;
buf->nice = 15 - buf->nice;
}
else if (server->os_version_code < LINUX_VERSION_CODE(1,1,30) && buf->tty != -1)
/* when tty wasn't full devno */
buf->tty = 4*0x100 + buf->tty;
buf->flags |= _glibtop_sysdeps_proc_uid_stat;
}