X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=src%2Fprint_disk_info.c;h=12d75857cf8dce882a19521d9726473877c9f972;hb=a13b2e7288e943359ccb37be86efb716efbe98c8;hp=b577d233ad56926e46418e0098ebc8c1f69a8be5;hpb=d6b8a4efc1c07f3bbf5f01f524986ecb496711a0;p=i3%2Fi3status diff --git a/src/print_disk_info.c b/src/print_disk_info.c index b577d23..12d7585 100644 --- a/src/print_disk_info.c +++ b/src/print_disk_info.c @@ -1,41 +1,107 @@ -// vim:ts=8:expandtab +// vim:ts=4:sw=4:expandtab #include #include #include #include #include +#include #include #include -#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || (__OpenBSD__) +#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || (__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__) #include #include +#else +#include #endif #include #include #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; } /* @@ -43,71 +109,99 @@ static int print_bytes_human(char *outwalk, uint64_t bytes) { * 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_not_mounted, const char *prefix_type, const char *threshold_type, const double low_threshold) { + const char *walk; + char *outwalk = buffer; + bool colorful_output = false; - INSTANCE(path); + INSTANCE(path); -#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) - struct statfs buf; +#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__) + struct statfs buf; - if (statfs(path, &buf) == -1) - return; + if (statfs(path, &buf) == -1) + return; #else - struct statvfs buf; + struct statvfs buf; + + if (statvfs(path, &buf) == -1) { + /* If statvfs errors, e.g., due to the path not existing, + * we use the format for a not mounted device. */ + format = format_not_mounted; + } else if (format_not_mounted != NULL) { + FILE *mntentfile = setmntent("/etc/mtab", "r"); + struct mntent *m; + bool found = false; + + while ((m = getmntent(mntentfile)) != NULL) { + if (strcmp(m->mnt_dir, path) == 0) { + found = true; + break; + } + } + endmntent(mntentfile); - if (statvfs(path, &buf) == -1) - return; + if (!found) { + format = format_not_mounted; + } + } #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 (BEGINS_WITH(walk+1, "percentage_free")) { - outwalk += sprintf(outwalk, "%.01f%%", 100.0 * (double)buf.f_bfree / (double)buf.f_blocks); - walk += strlen("percentage_free"); - } - - if (BEGINS_WITH(walk+1, "percentage_used_of_avail")) { - outwalk += sprintf(outwalk, "%.01f%%", 100.0 * (double)(buf.f_blocks - buf.f_bavail) / (double)buf.f_blocks); - walk += strlen("percentage_used_of_avail"); - } - - if (BEGINS_WITH(walk+1, "percentage_used")) { - outwalk += sprintf(outwalk, "%.01f%%", 100.0 * (double)(buf.f_blocks - buf.f_bfree) / (double)buf.f_blocks); - walk += strlen("percentage_used"); - } - - if (BEGINS_WITH(walk+1, "percentage_avail")) { - outwalk += sprintf(outwalk, "%.01f%%", 100.0 * (double)buf.f_bavail / (double)buf.f_blocks); - walk += strlen("percentage_avail"); - } + if (low_threshold > 0 && below_threshold(buf, prefix_type, threshold_type, low_threshold)) { + START_COLOR("color_bad"); + colorful_output = true; + } + + 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, prefix_type); + 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), prefix_type); + walk += strlen("used"); + } + + 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"); + } + + 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"); } - *outwalk = '\0'; - OUTPUT_FULL_TEXT(buffer); + 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"); + } + + 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"); + } + + 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"); + } + + 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"); + } + } + + if (colorful_output) + END_COLOR; + + *outwalk = '\0'; + OUTPUT_FULL_TEXT(buffer); }