238 lines
9.0 KiB
C
238 lines
9.0 KiB
C
// vim:ts=4:sw=4:expandtab
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <stdint.h>
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#include <sys/stat.h>
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#include <sys/statvfs.h>
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#include <sys/types.h>
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
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#include <sys/param.h>
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#include <sys/mount.h>
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#elif defined(__NetBSD__)
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#else
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#include <mntent.h>
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#endif
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#include <yajl/yajl_gen.h>
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#include <yajl/yajl_version.h>
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#include "i3status.h"
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#define STRING_SIZE 20
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#define BINARY_BASE UINT64_C(1024)
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#define DECIMAL_BASE UINT64_C(1000)
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#define MAX_EXPONENT 4
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static const char *const iec_symbols[MAX_EXPONENT + 1] = {"", "Ki", "Mi", "Gi", "Ti"};
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static const char *const si_symbols[MAX_EXPONENT + 1] = {"", "k", "M", "G", "T"};
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static const char *const custom_symbols[MAX_EXPONENT + 1] = {"", "K", "M", "G", "T"};
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/*
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* Formats bytes according to the given base and set of symbols.
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*
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*/
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static int format_bytes(char *outwalk, uint64_t bytes, uint64_t base, const char *const symbols[]) {
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double size = bytes;
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int exponent = 0;
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while (size >= base && exponent < MAX_EXPONENT) {
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size /= base;
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exponent += 1;
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}
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return sprintf(outwalk, "%.1f %sB", size, symbols[exponent]);
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}
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/*
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* Prints the given amount of bytes in a human readable manner.
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*
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*/
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static int print_bytes_human(char *outwalk, uint64_t bytes, const char *prefix_type) {
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if (strcasecmp(prefix_type, "decimal") == 0) {
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return format_bytes(outwalk, bytes, DECIMAL_BASE, si_symbols);
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} else if (strcasecmp(prefix_type, "custom") == 0) {
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return format_bytes(outwalk, bytes, BINARY_BASE, custom_symbols);
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} else {
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return format_bytes(outwalk, bytes, BINARY_BASE, iec_symbols);
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}
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}
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/*
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* Determines whether remaining bytes are below given threshold.
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*
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*/
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#if defined(__DragonFly__) || defined(__APPLE__)
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static bool below_threshold(struct statfs buf, const char *prefix_type, const char *threshold_type, const double low_threshold) {
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#else
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static bool below_threshold(struct statvfs buf, const char *prefix_type, const char *threshold_type, const double low_threshold) {
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#endif
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if (strcasecmp(threshold_type, "percentage_free") == 0) {
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return 100.0 * (double)buf.f_bfree / (double)buf.f_blocks < low_threshold;
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} else if (strcasecmp(threshold_type, "percentage_avail") == 0) {
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return 100.0 * (double)buf.f_bavail / (double)buf.f_blocks < low_threshold;
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} else if (strcasecmp(threshold_type, "bytes_free") == 0) {
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
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return (double)buf.f_bsize * (double)buf.f_bfree < low_threshold;
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#else
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return (double)buf.f_frsize * (double)buf.f_bfree < low_threshold;
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#endif
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} else if (strcasecmp(threshold_type, "bytes_avail") == 0) {
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
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return (double)buf.f_bsize * (double)buf.f_bavail < low_threshold;
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#else
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return (double)buf.f_frsize * (double)buf.f_bavail < low_threshold;
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#endif
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} else if (threshold_type[0] != '\0' && strncasecmp(threshold_type + 1, "bytes_", strlen("bytes_")) == 0) {
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uint64_t base = strcasecmp(prefix_type, "decimal") == 0 ? DECIMAL_BASE : BINARY_BASE;
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double factor = 1;
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switch (threshold_type[0]) {
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case 'T':
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case 't':
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factor *= base;
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/* fall-through */
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case 'G':
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case 'g':
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factor *= base;
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/* fall-through */
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case 'M':
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case 'm':
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factor *= base;
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/* fall-through */
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case 'K':
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case 'k':
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factor *= base;
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break;
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default:
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return false;
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}
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if (strcasecmp(threshold_type + 1, "bytes_free") == 0) {
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return (double)buf.f_bsize * (double)buf.f_bfree < low_threshold * factor;
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} else if (strcasecmp(threshold_type + 1, "bytes_avail") == 0) {
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return (double)buf.f_bsize * (double)buf.f_bavail < low_threshold * factor;
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}
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}
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return false;
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}
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/*
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* Does a statvfs and prints either free, used or total amounts of bytes in a
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* human readable manner.
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*
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*/
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void print_disk_info(disk_info_ctx_t *ctx) {
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const char *selected_format = ctx->format;
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char *outwalk = ctx->buf;
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bool colorful_output = false;
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bool mounted = false;
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INSTANCE(ctx->path);
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#if defined(__DragonFly__) || defined(__APPLE__)
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struct statfs buf;
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if (statfs(path, &buf) == -1)
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return;
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mounted = true;
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#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__)
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struct statvfs buf;
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if (statvfs(ctx->path, &buf) == -1)
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return;
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mounted = true;
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#else
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struct statvfs buf;
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if (statvfs(ctx->path, &buf) == -1) {
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/* If statvfs errors, e.g., due to the path not existing,
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* we consider the device not mounted. */
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mounted = false;
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} else {
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char *sanitized = sstrdup(ctx->path);
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if (strlen(sanitized) > 1 && sanitized[strlen(sanitized) - 1] == '/')
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sanitized[strlen(sanitized) - 1] = '\0';
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FILE *mntentfile = setmntent("/etc/mtab", "r");
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if (mntentfile == NULL) {
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mntentfile = setmntent("/proc/mounts", "r");
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}
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if (mntentfile == NULL) {
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fprintf(stderr, "i3status: files /etc/mtab and /proc/mounts aren't accessible\n");
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} else {
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struct mntent *m;
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while ((m = getmntent(mntentfile)) != NULL) {
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if (strcmp(m->mnt_dir, sanitized) == 0) {
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mounted = true;
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break;
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}
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}
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endmntent(mntentfile);
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}
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free(sanitized);
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}
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#endif
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if (!mounted) {
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if (ctx->format_not_mounted == NULL)
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ctx->format_not_mounted = "";
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selected_format = ctx->format_not_mounted;
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} else if (ctx->low_threshold > 0 && below_threshold(buf, ctx->prefix_type, ctx->threshold_type, ctx->low_threshold)) {
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START_COLOR("color_bad");
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colorful_output = true;
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if (ctx->format_below_threshold != NULL)
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selected_format = ctx->format_below_threshold;
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}
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char string_free[STRING_SIZE];
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char string_used[STRING_SIZE];
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char string_total[STRING_SIZE];
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char string_avail[STRING_SIZE];
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char string_percentage_free[STRING_SIZE];
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char string_percentage_used_of_avail[STRING_SIZE];
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char string_percentage_used[STRING_SIZE];
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char string_percentage_avail[STRING_SIZE];
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
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print_bytes_human(string_free, (uint64_t)buf.f_bsize * (uint64_t)buf.f_bfree, ctx->prefix_type);
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print_bytes_human(string_used, (uint64_t)buf.f_bsize * ((uint64_t)buf.f_blocks - (uint64_t)buf.f_bfree), ctx->prefix_type);
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print_bytes_human(string_total, (uint64_t)buf.f_bsize * (uint64_t)buf.f_blocks, ctx->prefix_type);
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print_bytes_human(string_avail, (uint64_t)buf.f_bsize * (uint64_t)buf.f_bavail, ctx->prefix_type);
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#else
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print_bytes_human(string_free, (uint64_t)buf.f_frsize * (uint64_t)buf.f_bfree, ctx->prefix_type);
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print_bytes_human(string_used, (uint64_t)buf.f_frsize * ((uint64_t)buf.f_blocks - (uint64_t)buf.f_bfree), ctx->prefix_type);
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print_bytes_human(string_total, (uint64_t)buf.f_frsize * (uint64_t)buf.f_blocks, ctx->prefix_type);
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print_bytes_human(string_avail, (uint64_t)buf.f_frsize * (uint64_t)buf.f_bavail, ctx->prefix_type);
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#endif
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snprintf(string_percentage_free, STRING_SIZE, "%.01f%s", 100.0 * (double)buf.f_bfree / (double)buf.f_blocks, pct_mark);
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snprintf(string_percentage_used_of_avail, STRING_SIZE, "%.01f%s", 100.0 * (double)(buf.f_blocks - buf.f_bavail) / (double)buf.f_blocks, pct_mark);
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snprintf(string_percentage_used, STRING_SIZE, "%.01f%s", 100.0 * (double)(buf.f_blocks - buf.f_bfree) / (double)buf.f_blocks, pct_mark);
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snprintf(string_percentage_avail, STRING_SIZE, "%.01f%s", 100.0 * (double)buf.f_bavail / (double)buf.f_blocks, pct_mark);
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placeholder_t placeholders[] = {
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{.name = "%free", .value = string_free},
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{.name = "%used", .value = string_used},
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{.name = "%total", .value = string_total},
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{.name = "%avail", .value = string_avail},
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{.name = "%percentage_free", .value = string_percentage_free},
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{.name = "%percentage_used_of_avail", .value = string_percentage_used_of_avail},
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{.name = "%percentage_used", .value = string_percentage_used},
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{.name = "%percentage_avail", .value = string_percentage_avail}};
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const size_t num = sizeof(placeholders) / sizeof(placeholder_t);
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char *formatted = format_placeholders(selected_format, &placeholders[0], num);
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OUTPUT_FORMATTED;
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free(formatted);
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if (colorful_output)
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END_COLOR;
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*outwalk = '\0';
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OUTPUT_FULL_TEXT(ctx->buf);
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}
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