9750a3d731
Granted, this style is definitely not common, but for the short utility-functions of this program it's just the right choice. This provides great flexibility, such that in the long run, it will be possible to also share code between the OS-implementations. This also keeps the state-keeping at a minimum and makes it clearer which functions are implemented on which OS without having to jiggle around with too many files in the process.
133 lines
2.7 KiB
C
133 lines
2.7 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <stdio.h>
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#include "../util.h"
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#if defined(__linux__)
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const char *
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ram_free(void)
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{
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long free;
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return (pscanf("/proc/meminfo", "MemFree: %ld kB\n", &free) == 1) ?
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bprintf("%f", (float)free / 1024 / 1024) : NULL;
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}
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const char *
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ram_perc(void)
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{
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long total, free, buffers, cached;
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return (pscanf("/proc/meminfo",
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"MemTotal: %ld kB\n"
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"MemFree: %ld kB\n"
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"MemAvailable: %ld kB\nBuffers: %ld kB\n"
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"Cached: %ld kB\n",
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&total, &free, &buffers, &buffers, &cached) == 5) ?
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bprintf("%d", 100 * ((total - free) - (buffers + cached)) /
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total) :
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NULL;
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}
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const char *
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ram_total(void)
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{
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long total;
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return (pscanf("/proc/meminfo", "MemTotal: %ld kB\n", &total) == 1) ?
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bprintf("%f", (float)total / 1024 / 1024) : NULL;
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}
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const char *
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ram_used(void)
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{
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long total, free, buffers, cached;
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return (pscanf("/proc/meminfo",
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"MemTotal: %ld kB\n"
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"MemFree: %ld kB\n"
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"MemAvailable: %ld kB\nBuffers: %ld kB\n"
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"Cached: %ld kB\n",
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&total, &free, &buffers, &buffers, &cached) == 5) ?
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bprintf("%f", (float)(total - free - buffers - cached) /
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1024 / 1024) :
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NULL;
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}
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#elif defined(__OpenBSD__)
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <stdlib.h>
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#include <unistd.h>
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inline int
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load_uvmexp(struct uvmexp *uvmexp)
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{
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int uvmexp_mib[] = {CTL_VM, VM_UVMEXP};
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size_t size;
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size = sizeof(*uvmexp);
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return sysctl(uvmexp_mib, 2, uvmexp, &size, NULL, 0) >= 0 ? 1 : 0;
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}
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const char *
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ram_free(void)
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{
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struct uvmexp uvmexp;
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float free;
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int free_pages;
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if (load_uvmexp(&uvmexp)) {
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free_pages = uvmexp.npages - uvmexp.active;
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free = (double) (free_pages * uvmexp.pagesize) / 1024 /
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1024 / 1024;
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return bprintf("%f", free);
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}
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return NULL;
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}
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const char *
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ram_perc(void)
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{
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struct uvmexp uvmexp;
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int percent;
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if (load_uvmexp(&uvmexp)) {
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percent = uvmexp.active * 100 / uvmexp.npages;
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return bprintf("%d", percent);
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}
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return NULL;
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}
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const char *
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ram_total(void)
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{
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struct uvmexp uvmexp;
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float total;
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if (load_uvmexp(&uvmexp)) {
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total = (double) (uvmexp.npages * uvmexp.pagesize) /
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1024 / 1024 / 1024;
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return bprintf("%f", total);
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}
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return NULL;
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}
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const char *
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ram_used(void)
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{
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struct uvmexp uvmexp;
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float used;
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if (load_uvmexp(&uvmexp)) {
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used = (double) (uvmexp.active * uvmexp.pagesize) /
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1024 / 1024 / 1024;
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return bprintf("%f", used);
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}
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return NULL;
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}
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#endif
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