From 991cae8c076d9da475bf833186219b3d2a396f29 Mon Sep 17 00:00:00 2001 From: reinelt <> Date: Sun, 16 Jan 2000 12:17:59 +0000 Subject: [lcd4linux @ 2000-01-16 12:17:59 by reinelt] Initial revision --- system.c | 306 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 306 insertions(+) create mode 100644 system.c (limited to 'system.c') 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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); +} -- cgit v1.2.3