-// vim:ts=8:expandtab
+// vim:ts=4:sw=4:expandtab
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdint.h>
+#include <sys/stat.h>
#include <sys/statvfs.h>
#include <sys/types.h>
-#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
#include <sys/param.h>
#include <sys/mount.h>
+#elif defined(__NetBSD__)
+#else
+#include <mntent.h>
#endif
#include <yajl/yajl_gen.h>
#include <yajl/yajl_version.h>
#include "i3status.h"
-#define TERABYTE (1024ULL * 1024 * 1024 * 1024)
-#define GIGABYTE (1024ULL * 1024 * 1024)
-#define MEGABYTE (1024ULL * 1024)
-#define KILOBYTE (1024ULL)
+#define BINARY_BASE UINT64_C(1024)
+#define DECIMAL_BASE UINT64_C(1000)
+
+#define MAX_EXPONENT 4
+
+static const char *const iec_symbols[MAX_EXPONENT + 1] = {"", "Ki", "Mi", "Gi", "Ti"};
+static const char *const si_symbols[MAX_EXPONENT + 1] = {"", "k", "M", "G", "T"};
+static const char *const custom_symbols[MAX_EXPONENT + 1] = {"", "K", "M", "G", "T"};
+
+/*
+ * Formats bytes according to the given base and set of symbols.
+ *
+ */
+static int format_bytes(char *outwalk, uint64_t bytes, uint64_t base, const char *const symbols[]) {
+ double size = bytes;
+ int exponent = 0;
+ while (size >= base && exponent < MAX_EXPONENT) {
+ size /= base;
+ exponent += 1;
+ }
+ return sprintf(outwalk, "%.1f %sB", size, symbols[exponent]);
+}
/*
* Prints the given amount of bytes in a human readable manner.
*
*/
-static int print_bytes_human(char *outwalk, uint64_t bytes) {
- if (bytes > TERABYTE)
- return sprintf(outwalk, "%.02f TB", (double)bytes / TERABYTE);
- else if (bytes > GIGABYTE)
- return sprintf(outwalk, "%.01f GB", (double)bytes / GIGABYTE);
- else if (bytes > MEGABYTE)
- return sprintf(outwalk, "%.01f MB", (double)bytes / MEGABYTE);
- else if (bytes > KILOBYTE)
- return sprintf(outwalk, "%.01f KB", (double)bytes / KILOBYTE);
- else {
- return sprintf(outwalk, "%.01f B", (double)bytes);
+static int print_bytes_human(char *outwalk, uint64_t bytes, const char *prefix_type) {
+ if (strcasecmp(prefix_type, "decimal") == 0) {
+ return format_bytes(outwalk, bytes, DECIMAL_BASE, si_symbols);
+ } else if (strcasecmp(prefix_type, "custom") == 0) {
+ return format_bytes(outwalk, bytes, BINARY_BASE, custom_symbols);
+ } else {
+ return format_bytes(outwalk, bytes, BINARY_BASE, iec_symbols);
+ }
+}
+
+/*
+ * Determines whether remaining bytes are below given threshold.
+ *
+ */
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
+static bool below_threshold(struct statfs buf, const char *prefix_type, const char *threshold_type, const double low_threshold) {
+#else
+static bool below_threshold(struct statvfs buf, const char *prefix_type, const char *threshold_type, const double low_threshold) {
+#endif
+ if (strcasecmp(threshold_type, "percentage_free") == 0) {
+ return 100.0 * (double)buf.f_bfree / (double)buf.f_blocks < low_threshold;
+ } else if (strcasecmp(threshold_type, "percentage_avail") == 0) {
+ return 100.0 * (double)buf.f_bavail / (double)buf.f_blocks < low_threshold;
+ } else if (strcasecmp(threshold_type, "bytes_free") == 0) {
+ return (double)buf.f_bsize * (double)buf.f_bfree < low_threshold;
+ } else if (strcasecmp(threshold_type, "bytes_avail") == 0) {
+ return (double)buf.f_bsize * (double)buf.f_bavail < low_threshold;
+ } else if (threshold_type[0] != '\0' && strncasecmp(threshold_type + 1, "bytes_", strlen("bytes_")) == 0) {
+ uint64_t base = strcasecmp(prefix_type, "decimal") == 0 ? DECIMAL_BASE : BINARY_BASE;
+ double factor = 1;
+
+ switch (threshold_type[0]) {
+ case 'T':
+ case 't':
+ factor *= base;
+ case 'G':
+ case 'g':
+ factor *= base;
+ case 'M':
+ case 'm':
+ factor *= base;
+ case 'K':
+ case 'k':
+ factor *= base;
+ break;
+ default:
+ return false;
+ }
+
+ if (strcasecmp(threshold_type + 1, "bytes_free") == 0) {
+ return (double)buf.f_bsize * (double)buf.f_bfree < low_threshold * factor;
+ } else if (strcasecmp(threshold_type + 1, "bytes_avail") == 0) {
+ return (double)buf.f_bsize * (double)buf.f_bavail < low_threshold * factor;
}
+ }
+
+ return false;
}
/*
* human readable manner.
*
*/
-void print_disk_info(yajl_gen json_gen, char *buffer, const char *path, const char *format) {
- const char *walk;
- char *outwalk = buffer;
+void print_disk_info(yajl_gen json_gen, char *buffer, const char *path, const char *format, const char *format_below_threshold, const char *format_not_mounted, const char *prefix_type, const char *threshold_type, const double low_threshold) {
+ const char *selected_format = format;
+ const char *walk;
+ char *outwalk = buffer;
+ bool colorful_output = false;
+ bool mounted = false;
+
+ INSTANCE(path);
+
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
+ struct statfs buf;
- INSTANCE(path);
+ if (statfs(path, &buf) == -1)
+ return;
-#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
- struct statfs buf;
+ mounted = true;
+#elif defined(__NetBSD__)
+ struct statvfs buf;
- if (statfs(path, &buf) == -1)
- return;
+ if (statvfs(path, &buf) == -1)
+ return;
+
+ mounted = true;
#else
- struct statvfs buf;
+ struct statvfs buf;
+
+ if (statvfs(path, &buf) == -1) {
+ /* If statvfs errors, e.g., due to the path not existing,
+ * we consider the device not mounted. */
+ mounted = false;
+ } else {
+ char *sanitized = sstrdup(path);
+ if (strlen(sanitized) > 1 && sanitized[strlen(sanitized) - 1] == '/')
+ sanitized[strlen(sanitized) - 1] = '\0';
+ FILE *mntentfile = setmntent("/etc/mtab", "r");
+ struct mntent *m;
- if (statvfs(path, &buf) == -1)
- return;
+ while ((m = getmntent(mntentfile)) != NULL) {
+ if (strcmp(m->mnt_dir, sanitized) == 0) {
+ mounted = true;
+ break;
+ }
+ }
+ endmntent(mntentfile);
+ free(sanitized);
+ }
#endif
- for (walk = format; *walk != '\0'; walk++) {
- if (*walk != '%') {
- *(outwalk++) = *walk;
- continue;
- }
-
- if (BEGINS_WITH(walk+1, "free")) {
- outwalk += print_bytes_human(outwalk, (uint64_t)buf.f_bsize * (uint64_t)buf.f_bfree);
- walk += strlen("free");
- }
-
- if (BEGINS_WITH(walk+1, "used")) {
- outwalk += print_bytes_human(outwalk, (uint64_t)buf.f_bsize * ((uint64_t)buf.f_blocks - (uint64_t)buf.f_bfree));
- walk += strlen("used");
- }
-
- if (BEGINS_WITH(walk+1, "total")) {
- outwalk += print_bytes_human(outwalk, (uint64_t)buf.f_bsize * (uint64_t)buf.f_blocks);
- walk += strlen("total");
- }
-
- if (BEGINS_WITH(walk+1, "avail")) {
- outwalk += print_bytes_human(outwalk, (uint64_t)buf.f_bsize * (uint64_t)buf.f_bavail);
- walk += strlen("avail");
- }
+ if (!mounted) {
+ if (format_not_mounted == NULL)
+ format_not_mounted = "";
+ selected_format = format_not_mounted;
+ } else if (low_threshold > 0 && below_threshold(buf, prefix_type, threshold_type, low_threshold)) {
+ START_COLOR("color_bad");
+ colorful_output = true;
+ if (format_below_threshold != NULL)
+ selected_format = format_below_threshold;
+ }
+
+ for (walk = selected_format; *walk != '\0'; walk++) {
+ if (*walk != '%') {
+ *(outwalk++) = *walk;
+
+ } else if (BEGINS_WITH(walk + 1, "free")) {
+ outwalk += print_bytes_human(outwalk, (uint64_t)buf.f_bsize * (uint64_t)buf.f_bfree, prefix_type);
+ walk += strlen("free");
+
+ } else if (BEGINS_WITH(walk + 1, "used")) {
+ outwalk += print_bytes_human(outwalk, (uint64_t)buf.f_bsize * ((uint64_t)buf.f_blocks - (uint64_t)buf.f_bfree), prefix_type);
+ walk += strlen("used");
+
+ } else if (BEGINS_WITH(walk + 1, "total")) {
+ outwalk += print_bytes_human(outwalk, (uint64_t)buf.f_bsize * (uint64_t)buf.f_blocks, prefix_type);
+ walk += strlen("total");
+
+ } else if (BEGINS_WITH(walk + 1, "avail")) {
+ outwalk += print_bytes_human(outwalk, (uint64_t)buf.f_bsize * (uint64_t)buf.f_bavail, prefix_type);
+ walk += strlen("avail");
+
+ } else if (BEGINS_WITH(walk + 1, "percentage_free")) {
+ outwalk += sprintf(outwalk, "%.01f%s", 100.0 * (double)buf.f_bfree / (double)buf.f_blocks, pct_mark);
+ walk += strlen("percentage_free");
+
+ } else if (BEGINS_WITH(walk + 1, "percentage_used_of_avail")) {
+ outwalk += sprintf(outwalk, "%.01f%s", 100.0 * (double)(buf.f_blocks - buf.f_bavail) / (double)buf.f_blocks, pct_mark);
+ walk += strlen("percentage_used_of_avail");
+
+ } else if (BEGINS_WITH(walk + 1, "percentage_used")) {
+ outwalk += sprintf(outwalk, "%.01f%s", 100.0 * (double)(buf.f_blocks - buf.f_bfree) / (double)buf.f_blocks, pct_mark);
+ walk += strlen("percentage_used");
+
+ } else if (BEGINS_WITH(walk + 1, "percentage_avail")) {
+ outwalk += sprintf(outwalk, "%.01f%s", 100.0 * (double)buf.f_bavail / (double)buf.f_blocks, pct_mark);
+ walk += strlen("percentage_avail");
+
+ } else {
+ *(outwalk++) = '%';
}
+ }
+
+ if (colorful_output)
+ END_COLOR;
- *outwalk = '\0';
- OUTPUT_FULL_TEXT(buffer);
+ *outwalk = '\0';
+ OUTPUT_FULL_TEXT(buffer);
}
projects / i3 / i3status / blobdiff