/* Copyright (c) 2008, 2009 * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de) * Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de) * Micah Cowan (micah@cowan.name) * Sadrul Habib Chowdhury (sadrul@users.sourceforge.net) * Copyright (c) 1993-2002, 2003, 2005, 2006, 2007 * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de) * Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de) * Copyright (c) 1987 Oliver Laumann * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program (see the file COPYING); if not, see * http://www.gnu.org/licenses/, or contact Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA * **************************************************************** */ #include #include #ifdef ultrix # include #endif /* mach stuff included here to prevent index macro conflict */ #ifdef NeXT # include # if KERNEL_MAJOR_VERSION > 2 # include # else # include # endif #endif #include "config.h" #include "screen.h" #include "extern.h" #ifdef LOADAV static int GetLoadav (void); static LOADAV_TYPE loadav[LOADAV_NUM]; static int loadok; /***************************************************************/ #if defined(linux) && !defined(LOADAV_DONE) #define LOADAV_DONE /* * This is the easy way. It relies in /proc being mounted. * For the big and ugly way refer to previous screen version. */ void InitLoadav() { loadok = 1; } static int GetLoadav() { FILE *fp; char buf[128], *s; int i; double d, e; if ((fp = secfopen("/proc/loadavg", "r")) == NULL) return 0; *buf = 0; fgets(buf, sizeof(buf), fp); fclose(fp); /* can't use fscanf because the decimal point symbol depends on * the locale but the kernel uses always '.'. */ s = buf; for (i = 0; i < (LOADAV_NUM > 3 ? 3 : LOADAV_NUM); i++) { d = e = 0; while(*s == ' ') s++; if (*s == 0) break; for(;;) { if (*s == '.') e = 1; else if (*s >= '0' && *s <= '9') { d = d * 10 + (*s - '0'); if (e) e *= 10; } else break; s++; } loadav[i] = e ? d / e : d; } return i; } #endif /* linux */ /***************************************************************/ #if defined(LOADAV_GETLOADAVG) && !defined(LOADAV_DONE) #define LOADAV_DONE void InitLoadav() { loadok = 1; } static int GetLoadav() { return getloadavg(loadav, LOADAV_NUM); } #endif /***************************************************************/ #if defined(apollo) && !defined(LOADAV_DONE) #define LOADAV_DONE void InitLoadav() { loadok = 1; } static int GetLoadav() { proc1_$get_loadav(loadav); return LOADAV_NUM; } #endif /***************************************************************/ #if defined(NeXT) && !defined(LOADAV_DONE) #define LOADAV_DONE static processor_set_t default_set; void InitLoadav() { kern_return_t error; error = processor_set_default(host_self(), &default_set); if (error != KERN_SUCCESS) mach_error("Error calling processor_set_default", error); else loadok = 1; } static int GetLoadav() { unsigned int info_count; struct processor_set_basic_info info; host_t host; info_count = PROCESSOR_SET_BASIC_INFO_COUNT; if (processor_set_info(default_set, PROCESSOR_SET_BASIC_INFO, &host, (processor_set_info_t)&info, &info_count) != KERN_SUCCESS) return 0; loadav[0] = (float)info.load_average / LOAD_SCALE; return 1; } #endif /***************************************************************/ #if defined(sun) && defined(SVR4) && !defined(LOADAV_DONE) #define LOADAV_DONE #include static kstat_ctl_t *kc; void InitLoadav() { loadok = (kc = kstat_open()) != 0; } static int GetLoadav() { kstat_t *ks; kstat_named_t *avgs[3]; int i; kstat_chain_update(kc); if ((ks = kstat_lookup(kc, "unix", -1, "system_misc")) == 0 || kstat_read(kc, ks, (void *)0) == -1) return (loadok = 0); avgs[0] = kstat_data_lookup(ks, "avenrun_1min"); avgs[1] = kstat_data_lookup(ks, "avenrun_5min"); avgs[2] = kstat_data_lookup(ks, "avenrun_15min"); for (i = 0; i < 3; i++) { if (avgs[i] == 0 || avgs[i]->data_type != KSTAT_DATA_ULONG) return (loadok = 0); loadav[i] = avgs[i]->value.ul; } return 3; } #endif /***************************************************************/ #if defined(__osf__) && defined(__alpha) && !defined(LOADAV_DONE) #define LOADAV_DONE struct rtentry; struct mbuf; /* shut up gcc on OSF/1 4.0 */ #include void InitLoadav() { loadok = 1; } static int GetLoadav() { struct tbl_loadavg tbl; int i; if (table(TBL_LOADAVG, 0, &tbl, 1, sizeof(struct tbl_loadavg)) != 1) return 0; if (tbl.tl_lscale) { /* in long */ for (i = 0; i < LOADAV_NUM; i++) loadav[i] = (double) tbl.tl_avenrun.l[i] / tbl.tl_lscale; } else { /* in double */ for (i = 0; i < LOADAV_NUM; i++) loadav[i] = tbl.tl_avenrun.d[i]; } return LOADAV_NUM; } #endif /***************************************************************/ #if !defined(LOADAV_DONE) /* * The old fashion way: open kernel and read avenrun * * Header File includes */ # ifdef NLIST_STRUCT # include # else # include # endif # ifndef NLIST_DECLARED extern int nlist (char *, struct nlist *); # endif #ifdef LOADAV_USE_NLIST64 # define nlist nlist64 #endif static struct nlist nl[2]; static int kmemf; #ifdef _IBMR2 # define nlist(u,l) knlist(l,1,sizeof(*l)) #endif void InitLoadav() { debug("Init Kmem...\n"); if ((kmemf = open("/dev/kmem", O_RDONLY)) == -1) return; # if !defined(_AUX_SOURCE) && !defined(AUX) # ifdef NLIST_NAME_UNION nl[0].n_un.n_name = LOADAV_AVENRUN; # else nl[0].n_name = LOADAV_AVENRUN; # endif # else strncpy(nl[0].n_name, LOADAV_AVENRUN, sizeof(nl[0].n_name)); # endif debug2("Searching in %s for %s\n", LOADAV_UNIX, nl[0].n_name); nlist(LOADAV_UNIX, nl); if (nl[0].n_value == 0) { close(kmemf); return; } # if 0 /* no longer needed (Al.Smith@aeschi.ch.eu.org) */ # ifdef sgi nl[0].n_value &= (unsigned long)-1 >> 1; /* clear upper bit */ # endif /* sgi */ # endif debug1("AvenrunSym found (0x%lx)!!\n", nl[0].n_value); loadok = 1; } static int GetLoadav() { if (lseek(kmemf, (off_t) nl[0].n_value, 0) == (off_t)-1) return 0; if (read(kmemf, (char *) loadav, sizeof(loadav)) != sizeof(loadav)) return 0; return LOADAV_NUM; } #endif /***************************************************************/ #ifndef FIX_TO_DBL #define FIX_TO_DBL(l) ((double)(l) / LOADAV_SCALE) #endif void AddLoadav(char *p) { int i, j; if (loadok == 0) return; j = GetLoadav(); for (i = 0; i < j; i++) { sprintf(p, " %2.2f" + !i, FIX_TO_DBL(loadav[i])); p += strlen(p); } } #endif /* LOADAV */