Nahrány soubory do „/“
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2 changed files with 174 additions and 0 deletions
17
Makefile
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17
Makefile
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CC = gcc
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CFLAGS = -Wall -pedantic -Werror -std=c99 -O2
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target = rc-status-memory
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source = main.c
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$(target): Makefile $(source)
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$(CC) $(CFLAGS) -o $(target) $(source)
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.PHONY : clean
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clean:
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@echo "provadim clean"
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rm -f $(target)
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install: $(target)
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@echo "Instaluji"
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cp -f $(target) /usr/local/bin
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sync
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157
main.c
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157
main.c
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/*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of the nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/*
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* parametry
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* -v delsi vypis
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* -s simple - usporny vypis
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* -l[label] vlastni nadpis
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* -p vypis v procentech
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <getopt.h>
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#include <string.h>
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#include <strings.h>
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#define MAX_LABEL_LENGTH 32
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#define MEMORY_INFO_PERCENT 1
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#define MEMORY_INFO_VERBOSE 2
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static void show_help(void)
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{
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puts("parametry:");
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puts(" -p zobrazi hodnoty v procentech");
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puts(" -v podrobnejsi vypis");
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puts(" -s kratky vypis");
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puts(" -l <nadpis>");
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}
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static int print_output(const char *szlabel, uint_fast32_t params)
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{
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FILE *pfile = fopen("/proc/meminfo", "r");
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if (NULL == pfile) {
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printf("ERROR");
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return EXIT_FAILURE;
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}
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char line[256];
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unsigned int mem_total = 0;
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unsigned int mem_avail = 0;
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unsigned int swap_total = 0;
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unsigned int swap_free = 0;
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unsigned int end = 0;
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while (fgets(line, sizeof(line), pfile)) {
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if (sscanf(line, "MemTotal: %u kB", &mem_total) == 1) {
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end |= 1;
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continue;
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}
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if (sscanf(line, "MemAvailable: %u kB", &mem_avail) == 1) {
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end |= 2;
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continue;
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}
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if (sscanf(line, "SwapTotal: %u kB", &swap_total) == 1) {
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end |= 4;
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continue;
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}
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if (sscanf(line, "SwapFree: %u kB", &swap_free) == 1) {
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end |= 8;
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continue;
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}
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if (0xF == end)
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break;
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}
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fclose(pfile);
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if (0 == mem_total)
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return EXIT_FAILURE;
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char sztext[32];
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char outbuff[64 + MAX_LABEL_LENGTH];
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*sztext = 0;
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*outbuff = 0;
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if ((NULL != szlabel) && (*szlabel != 0)) {
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strncat(outbuff, szlabel,
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sizeof(outbuff) - strlen(outbuff) - 1);
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strncat(outbuff, " ", sizeof(outbuff) - strlen(outbuff) - 1);
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}
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if (MEMORY_INFO_PERCENT & params) {
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sprintf(sztext, "%u", 100*(mem_total - mem_avail) / mem_total);
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strncat(sztext, "%", sizeof(outbuff) - strlen(outbuff) - 1);
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}
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else {
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sprintf(sztext, (MEMORY_INFO_VERBOSE & params) ? "%.2f GiB" : "%.2f",
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(double)(mem_total - mem_avail) / (1024 * 1024));
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}
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strncat(outbuff, sztext, sizeof(outbuff) - strlen(outbuff) - 1);
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if (0 == swap_total)
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return EXIT_SUCCESS;
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if (MEMORY_INFO_PERCENT & params) {
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sprintf(sztext, " %u", 100*(swap_total - swap_free) / swap_total);
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strncat(sztext, "%", sizeof(outbuff) - strlen(outbuff) - 1);
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}
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else
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sprintf(sztext, (MEMORY_INFO_VERBOSE & params) ? " - %.2f GiB" : " %.2f G",
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(double)(swap_total - swap_free) / (1024 * 1024));
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strncat(outbuff, sztext, sizeof(outbuff) - strlen(outbuff) - 1);
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puts(outbuff);
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return EXIT_SUCCESS;
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}
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int main(int argc, char **argv)
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{
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int opt;
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uint_fast32_t params = 0;
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char szlabel[MAX_LABEL_LENGTH];
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*szlabel = 0;
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if (argc > 1) {
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while ((opt = getopt(argc, argv, "vsphl:")) != -1) {
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switch (opt) {
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case 'l':
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if (strlen(optarg) <= sizeof(szlabel) - 1)
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strncpy(szlabel, optarg,
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sizeof(szlabel) - strlen(szlabel) - 1);
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break;
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case 'p':
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params |= MEMORY_INFO_PERCENT;
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break;
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case 's':
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params &= ~MEMORY_INFO_VERBOSE;
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break;
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case 'v':
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params |= MEMORY_INFO_VERBOSE;
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break;
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case 'h':
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show_help();
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return EXIT_SUCCESS;
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break;
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}
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}
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}
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return print_output(szlabel, params);
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}
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