Chillcraft/libgtop
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Major code cleanups, we now use open () and read ().

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This commit is contained in:
Martin Baulig
1998-08-16 13:37:14 +00:00
parent 486cc220c4
commit 36657db940
6 changed files with 162 additions and 49 deletions
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47
sysdeps/linux/loadavg.c
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@@ -26,6 +26,11 @@
static const unsigned long _glibtop_sysdeps_loadavg =
(1 << GLIBTOP_LOADAVG_LOADAVG);
static const unsigned long _glibtop_sysdeps_loadavg_tasks =
(1 << GLIBTOP_LOADAVG_NR_RUNNING) +
(1 << GLIBTOP_LOADAVG_NR_TASKS) +
(1 << GLIBTOP_LOADAVG_LAST_PID);
/* Init function. */
void
@@ -41,19 +46,47 @@ glibtop_init_loadavg_s (glibtop *server)
void
glibtop_get_loadavg_s (glibtop *server, glibtop_loadavg *buf)
{
FILE *f;
char buffer [BUFSIZ], *p, *old;
int fd, len;
glibtop_init_s (&server, GLIBTOP_SYSDEPS_LOADAVG, 0);
memset (buf, 0, sizeof (glibtop_loadavg));
fd = open (FILENAME, O_RDONLY);
if (fd < 0)
glibtop_error_io_r (server, "open (%s)", FILENAME);
len = read (fd, buffer, BUFSIZ-1);
if (len < 0)
glibtop_error_io_r (server, "read (%s)", FILENAME);
close (fd);
buffer [len] = '\0';
buf->loadavg [0] = (float) strtod (buffer, &p);
buf->loadavg [1] = (float) strtod (p, &p);
buf->loadavg [2] = (float) strtod (p, &p);
buf->flags = _glibtop_sysdeps_loadavg;
f = fopen ("/proc/loadavg", "r");
if (!f) return;
while (isspace(*p)) p++;
fscanf (f, "%lf %lf %lf\n",
&buf->loadavg [0], &buf->loadavg [1], &buf->loadavg [2]);
fclose (f);
/* Older Linux versions don't have the nr_running/nr_tasks fields. */
old = p;
while (*p) {
if (*p == '/')
break;
if (!isdigit (*p))
return;
p++;
}
buf->nr_running = strtoul (old, &p, 0); p++;
buf->nr_tasks = strtoul (p, &p, 0);
buf->last_pid = strtoul (p, &p, 0);
buf->flags |= _glibtop_sysdeps_loadavg_tasks;
}