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#include <stdio.h> |
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#ifdef LINUX |
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#include <string.h> |
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#endif |
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#ifdef SOLARIS |
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#include <unistd.h> |
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#include <kstat.h> |
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#endif |
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#ifdef FREEBSD |
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#include <sys/types.h> |
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#include <sys/sysctl.h> |
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#include <unistd.h> |
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#endif |
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#include "ukcprog.h" |
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|
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char *get_memory_stats(){ |
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long total=0; |
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long free=0; |
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long used=0; |
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long cache=0; |
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char *xml_memory_stats; |
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#ifdef LINUX |
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FILE *f; |
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char *line; |
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long buffers; |
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#endif |
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#ifdef SOLARIS |
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kstat_ctl_t *kc; |
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kstat_t *ksp; |
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kstat_named_t *kn; |
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u_long totalmem; |
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int pagesize; |
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#endif |
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#ifdef FREEBSD |
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#define TOTAL_MEM_NAME "hw.physmem" |
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#define FREE_MEM_NAME "vm.stats.vm.v_free_count" |
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#define INACTIVE_MEM_NAME "vm.stats.vm.v_inactive_count" |
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#define CACHE_MEM_NAME "vm.stats.vm.v_cache_count" |
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int pagesize; |
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long inactive; |
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size_t size; |
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#endif |
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|
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#ifdef LINUX |
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if ((f=fopen("/proc/meminfo", "r" ))==NULL) { |
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errf("Failed to open memory stats (%m)"); |
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return NULL; |
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} |
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while((line=fpgetline(f)) != NULL){ |
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if (((strncmp(line,"Mem:",4)) == 0)) { |
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if((sscanf(line, "%*s %ld %ld %ld %*s %ld %ld", &total, &used, &free, &buffers, &cache)) != 5){ |
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errf("Failed to read memory details (%m)"); |
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return NULL; |
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} |
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break; |
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} |
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} |
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if ((fclose(f)) != 0) { |
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errf("Failed to close file (%m)"); |
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return NULL; |
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} |
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|
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cache=cache+buffers; |
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used=total-(free+cache); |
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|
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total=(total/1024)/1024; |
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used=(used/1024)/1024; |
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free=(free/1024)/1024; |
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cache=(free/1024)/1024; |
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#endif |
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#ifdef SOLARIS |
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if((pagesize=sysconf(_SC_PAGESIZE)) == -1){ |
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errf("Failed to get pagesize (%m)"); |
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return NULL; |
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} |
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|
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if((totalmem=sysconf(_SC_PHYS_PAGES)) == -1){ |
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errf("Failed to get total memory"); |
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return NULL; |
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} |
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|
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if ((kc = kstat_open()) == NULL) { |
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errf("kstat_open failure (%m)"); |
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return NULL; |
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} |
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if((ksp=kstat_lookup(kc, "unix", 0, "system_pages")) == NULL){ |
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errf("kstat lookup for \"system_pages\" (%m)"); |
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return NULL; |
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} |
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if (kstat_read(kc, ksp, 0) == -1) { |
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errf("Failed to read kstat details (%m)"); |
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return NULL; |
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} |
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if((kn=kstat_data_lookup(ksp, "freemem")) == NULL){ |
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errf("Failed to get free memory (%m)"); |
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return NULL; |
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} |
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if((kstat_close(kc)) != 0){ |
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errf("Failed to close kstat control structure (%m)"); |
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return NULL; |
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} |
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total=((totalmem*pagesize)/1024)/1024; |
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free=(((kn->value.ul)*pagesize)/1024)/1024; |
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used=total-free; |
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#endif |
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#ifdef FREEBSD |
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if ((pagesize=getpagesize()) == -1){ |
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errf("Failed to get page size (%m)"); |
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return NULL; |
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} |
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|
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if (sysctlbyname(TOTAL_MEM_NAME, NULL, &size, NULL, NULL) < 0){ |
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errf("sysctlbyname failed to get total memory (%m)"); |
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return NULL; |
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} |
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if (sysctlbyname(TOTAL_MEM_NAME, &total, &size, NULL, NULL) < 0){ |
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errf("Failed to get total memory stats (%m)"); |
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return NULL; |
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} |
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|
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if (sysctlbyname(FREE_MEM_NAME, NULL, &size, NULL, NULL) < 0){ |
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errf("sysctlbyname failed to get free memory (%m)"); |
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return NULL; |
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} |
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if (sysctlbyname(FREE_MEM_NAME, &free, &size, NULL, NULL) < 0){ |
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errf("Failed to get free memory stats (%m)"); |
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return NULL; |
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} |
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|
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if (sysctlbyname(INACTIVE_MEM_NAME, NULL, &size, NULL, NULL) < 0){ |
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errf("sysctlbyname failed to get inactive memory (%m)"); |
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return NULL; |
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} |
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if (sysctlbyname(INACTIVE_MEM_NAME, &inactive, &size, NULL, NULL) < 0){ |
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errf("Failed to get inactive memory stats (%m)"); |
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return NULL; |
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} |
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|
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if (sysctlbyname(CACHE_MEM_NAME, NULL, &size, NULL, NULL) < 0){ |
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errf("sysctlbyname failed to get cache memory (%m)"); |
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return NULL; |
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} |
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if (sysctlbyname(CACHE_MEM_NAME, &cache, &size, NULL, NULL) < 0){ |
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errf("Failed to get cache memory stats (%m)"); |
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return NULL; |
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} |
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|
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total/=(1024*1024); |
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free=((free*pagesize)/(1024*1024))+((inactive*pagesize)/(1024*1024)); |
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cache=((cache*pagesize)/(1024*1024)); |
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|
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/* used should also be cache+active+wired but its less effort this way :) */ |
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used=total-free; |
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|
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#endif |
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|
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|
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if((xml_memory_stats=strf("<memory><total>%ld</total><free>%ld</free><used>%ld</used><cache>%ld</cache></memory>", total, free, used, cache)) == NULL){ |
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errf("strf failed (%m)"); |
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return NULL; |
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} |
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return xml_memory_stats; |
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} |
