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-rw-r--r--system.c306
1 files changed, 306 insertions, 0 deletions
diff --git a/system.c b/system.c
new file mode 100644
index 0000000..0d3679f
--- /dev/null
+++ b/system.c
@@ -0,0 +1,306 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/utsname.h>
+#include <asm/param.h>
+
+#include "system.h"
+#include "filter.h"
+#include "lcd4linux.h"
+
+char *System(void)
+{
+ static char buffer[32]="";
+ struct utsname ubuf;
+
+ if (*buffer=='\0') {
+ if (uname(&ubuf)==-1) {
+ perror ("uname() failed");
+ strcpy (buffer, "unknown");
+ } else {
+ strncpy (buffer, ubuf.sysname, sizeof(buffer));
+ }
+ }
+ return buffer;
+}
+
+char *Release(void)
+{
+ static char buffer[32]="";
+ struct utsname ubuf;
+
+ if (*buffer=='\0') {
+ if (uname(&ubuf)==-1) {
+ perror ("uname() failed");
+ strcpy (buffer, "unknown");
+ } else {
+ strncpy (buffer, ubuf.release, sizeof(buffer));
+ }
+ }
+ return buffer;
+}
+
+
+char *Processor(void)
+{
+ static char buffer[16]="";
+ struct utsname ubuf;
+
+ if (*buffer=='\0') {
+ if (uname(&ubuf)==-1) {
+ perror ("uname() failed");
+ strcpy (buffer, "unknown");
+ } else {
+ strncpy (buffer, ubuf.machine, sizeof(buffer));
+ }
+ }
+ return buffer;
+}
+
+
+int Memory(void)
+{
+ static int value=-1;
+ struct stat buf;
+
+ if (value==-1) {
+ if (stat("/proc/kcore", &buf)==-1) {
+ perror ("stat(/proc/kcore) failed");
+ value=0;
+ } else {
+ value=buf.st_size>>20;
+ }
+ }
+ return value;
+}
+
+
+double Load (void)
+{
+ static int fd=-2;
+ char buffer[16];
+ static double value=0;
+ static time_t now=0;
+
+ if (fd==-1) return 0;
+
+ if (time(NULL)==now) return value;
+ time(&now);
+
+ if (fd==-2) {
+ fd=open("/proc/loadavg", O_RDONLY);
+ if (fd==-1) {
+ perror ("open(/proc/loadavg) failed");
+ return 0;
+ }
+ }
+ if (lseek(fd, 0L, SEEK_SET)!=0) {
+ perror("lseek(/proc/loadavg) failed");
+ fd=-1;
+ return 0;
+ }
+ if (read (fd, &buffer, sizeof(buffer)-1)==-1) {
+ perror("read(/proc/loadavg) failed");
+ fd=-1;
+ return 0;
+ }
+ if (sscanf(buffer, "%lf", &value)<1) {
+ fprintf(stderr, "scanf(/proc/loadavg) failed\n");
+ fd=-1;
+ return 0;
+ }
+ return (value);
+}
+
+
+double Busy (void)
+{
+ static int fd=-2;
+ char buffer[64];
+ unsigned long v1, v2, v3, v4;
+ double busy, idle;
+
+ if (fd==-1) return 0;
+
+ if (fd==-2) {
+ fd=open("/proc/stat", O_RDONLY);
+ if (fd==-1) {
+ perror ("open(proc/stat) failed");
+ return 0;
+ }
+ }
+ if (lseek(fd, 0L, SEEK_SET)!=0) {
+ perror ("lseek(/proc/stat) failed");
+ fd=-1;
+ return 0;
+ }
+ if (read (fd, &buffer, sizeof(buffer)-1)==-1) {
+ perror ("read(/proc/stat) failed");
+ fd=-1;
+ return 0;
+ }
+ if (sscanf(buffer, "%*s %lu %lu %lu %lu\n", &v1, &v2, &v3, &v4)<4) {
+ fprintf (stderr, "scanf(/proc/stat) failed\n");
+ fd=-1;
+ return 0;
+ }
+
+ busy=smooth("cpu_busy", 500, v1+v2+v3);
+ idle=smooth("cpu_idle", 500, v4);
+
+ if (busy+idle==0.0)
+ return 0.0;
+ else
+ return busy/(busy+idle);
+}
+
+
+int Disk (int *r, int *w)
+{
+ char buffer[4096], *p;
+ static int fd=-2;
+ unsigned long r1, r2, r3, r4;
+ unsigned long w1, w2, w3, w4;
+
+ *r=0;
+ *w=0;
+
+ if (fd==-1) return 0;
+
+ if (fd==-2) {
+ fd = open("/proc/stat", O_RDONLY | O_NDELAY);
+ if (fd==-1) {
+ perror ("open(/proc/stat) failed");
+ return 0;
+ }
+ }
+
+ if (lseek(fd, 0L, SEEK_SET)!=0) {
+ perror ("lseek(/proc/stat) failed");
+ fd=-1;
+ return 0;
+ }
+ if (read (fd, &buffer, sizeof(buffer)-1)==-1) {
+ perror ("read(/proc/stat) failed");
+ fd=-1;
+ return 0;
+ }
+ p=strstr(buffer, "disk_rblk");
+ if (p==NULL) {
+ fprintf (stderr, "parse(/proc/stat) failed: no disk_rblk line\n");
+ fd=-1;
+ return 0;
+ }
+ if (sscanf(p+9, "%lu %lu %lu %lu\n", &r1, &r2, &r3, &r4)<4) {
+ fprintf (stderr, "scanf(/proc/stat) failed\n");
+ fd=-1;
+ return 0;
+ }
+ p=strstr(buffer, "disk_wblk");
+ if (p==NULL) {
+ fprintf (stderr, "parse(/proc/stat) failed: no disk_wblk line\n");
+ fd=-1;
+ return 0;
+ }
+ if (sscanf(p+9, "%lu %lu %lu %lu\n", &w1, &w2, &w3, &w4)<4) {
+ fprintf (stderr, "scanf(/proc/stat) failed\n");
+ fd=-1;
+ return 0;
+ }
+
+ *r=smooth ("disk_r", 500, r1+r2+r3+r4);
+ *w=smooth ("disk_w", 500, w1+w2+w3+w4);
+
+ return *r+*w;
+}
+
+
+int Net (int *rx, int *tx)
+{
+ char buffer[4096], *p, *s;
+ static int fd=-2;
+ unsigned long pkg_rx, pkg_tx;
+
+ *rx=0;
+ *tx=0;
+
+ if (fd==-1) return 0;
+
+ if (fd==-2) {
+ fd = open("/proc/net/dev", O_RDONLY | O_NDELAY);
+ if (fd==-1) {
+ perror ("open(/proc/net/dev) failed");
+ return 0;
+ }
+ }
+
+ if (lseek(fd, 0L, SEEK_SET)!=0) {
+ perror ("lseek(/proc/net/dev) failed");
+ fd=-1;
+ return 0;
+ }
+ if (read (fd, &buffer, sizeof(buffer)-1)==-1) {
+ perror ("read(/proc/net/dev) failed");
+ fd=-1;
+ return 0;
+ }
+ pkg_rx=0;
+ pkg_tx=0;
+ p=buffer;
+ while ((s=strsep(&p, "\n"))) {
+ unsigned long r, t;
+ if (sscanf (s, " eth%*d:%*d: %ld %*d %*d %*d %*d %ld", &r, &t)==2 ||
+ sscanf (s, " eth%*d: %ld %*d %*d %*d %*d %ld", &r, &t)==2) {
+ pkg_rx+=r;
+ pkg_tx+=t;
+ }
+ }
+ *rx=smooth("net_rx", 500, pkg_rx);
+ *tx=smooth("net_tx", 500, pkg_tx);
+
+ return *rx+*tx;
+}
+
+
+double Temperature (void)
+{
+ static int fd=-2;
+ char buffer[32];
+ static double value=0.0;
+ static time_t now=0;
+
+ if (fd==-1) return 0;
+
+ if (time(NULL)==now) return value;
+ time(&now);
+
+ if (fd==-2) {
+ fd=open(sensor, O_RDONLY);
+ if (fd==-1) {
+ fprintf (stderr, "open (%s) failed: %s\n", sensor, strerror(errno));
+ return 0;
+ }
+ }
+ if (lseek(fd, 0L, SEEK_SET)!=0) {
+ fprintf (stderr, "lseek(%s) failed: %s\n", sensor, strerror(errno));
+ fd=-1;
+ return 0;
+ }
+ if (read (fd, &buffer, sizeof(buffer)-1)==-1) {
+ fprintf (stderr, "read(%s) failed: %s\n", sensor, strerror(errno));
+ fd=-1;
+ return 0;
+ }
+ if (sscanf(buffer, "%*f %*f %lf", &value)<1) {
+ fprintf (stderr, "scanf(%s) failed\n", sensor);
+ fd=-1;
+ return 0;
+ }
+ return (value);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-20 11:00:20 +0000