mirror of
https://github.com/munin-monitoring/contrib.git
synced 2018-11-08 00:59:34 +01:00
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "common.h"
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#define FS_FILE_NR "/proc/sys/fs/file-nr"
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int open_files(int argc, char **argv) {
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FILE *f;
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int alloc, freeh, avail;
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if(argc > 1) {
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if(!strcmp(argv[1], "config")) {
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if(!(f=fopen(FS_FILE_NR, "r"))) {
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fprintf(stderr, "cannot open " FS_FILE_NR "\n");
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return 1;
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}
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if(1 != fscanf(f, "%*d %*d %d", &avail)) {
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fclose(f);
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fprintf(stderr, "cannot read from " FS_FILE_NR
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"\n");
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return 1;
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}
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fclose(f);
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puts("graph_title File table usage\n"
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"graph_args --base 1000 -l 0\n"
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"graph_vlabel number of open files\n"
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"graph_category system\n"
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"graph_info This graph monitors the Linux open files table.\n"
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"used.label open files\n"
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"used.info The number of currently open files.\n"
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"max.label max open files\n"
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"max.info The maximum supported number of open "
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"files. Tune by modifying " FS_FILE_NR
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".");
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printf("used.warning %d\nused.critical %d\n",
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(int)(avail*0.92), (int)(avail*0.98));
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return 0;
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}
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if(!strcmp(argv[1], "autoconf")) {
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if(0 == access(FS_FILE_NR, R_OK))
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return writeyes();
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else
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return writeno(FS_FILE_NR " not readable");
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}
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}
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if(!(f=fopen(FS_FILE_NR, "r"))) {
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fputs("cannot open " FS_FILE_NR "\n", stderr);
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return 1;
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}
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if(3 != fscanf(f, "%d %d %d", &alloc, &freeh, &avail)) {
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fclose(f);
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fputs("cannot read from " FS_FILE_NR "\n", stderr);
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return 1;
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}
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fclose(f);
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printf("used.value %d\nmax.value %d\n", alloc-freeh, avail);
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return 0;
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}
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