2cd7361294
Switch xz to memusage(2) and fix native self-cross issue. This is a compatible ABI change.
205 lines
5.1 KiB
C
205 lines
5.1 KiB
C
/*
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* Copyright (c) 2011, 2022, 2023 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* memstat.c
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* System memory statistics.
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*/
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#include <err.h>
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#include <memusage.h>
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#include <stdbool.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 <unistd.h>
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#define BYTES 0
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#define KIBI 1
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#define MEBI 2
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#define GIBI 3
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#define TEBI 4
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#define PEBI 5
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#define EXBI 6
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static char* format_bytes_amount(uintmax_t num_bytes, int unit, bool raw)
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{
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uintmax_t value = num_bytes;
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uintmax_t value_fraction = 0;
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uintmax_t exponent = 1024;
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char suffixes[] = { 'B', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y' };
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size_t num_suffixes = sizeof(suffixes) / sizeof(suffixes[0]);
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size_t suffix_index = 0;
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while ( (unit < 0 ? exponent <= value : (int) suffix_index < unit) &&
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suffix_index + 1 < num_suffixes )
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{
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value_fraction = value % exponent;
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value /= exponent;
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suffix_index++;
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}
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char suffix_char = raw ? 0 : suffixes[suffix_index];
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char value_fraction_char = '0' + (value_fraction / (1024 / 10 + 1)) % 10;
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char decimals[3] = {suffix_index ? '.' : 0, value_fraction_char, 0};
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char* result;
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if ( asprintf(&result, "%ju%s%c", value, decimals, suffix_char) < 0 )
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return NULL;
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return result;
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}
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struct memusage
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{
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size_t counter;
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const char* name;
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};
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static const struct memusage memusages[] =
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{
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{MEMUSAGE_TOTAL, "total"},
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{MEMUSAGE_USED, "used"},
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{MEMUSAGE_PURPOSE_USERSPACE, "userspace"},
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{MEMUSAGE_PURPOSE_KERNEL, "kernel"},
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{MEMUSAGE_PURPOSE_FILESYSTEM, "filesystem"},
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{MEMUSAGE_PURPOSE_NETWORK, "network"},
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{MEMUSAGE_PURPOSE_PAGING, "paging"},
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{MEMUSAGE_PURPOSE_DRIVER, "driver"},
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{MEMUSAGE_PURPOSE_PHYSICAL, "physical"},
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{MEMUSAGE_PURPOSE_EXECVE, "execve"},
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};
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int main(int argc, char* argv[])
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{
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bool all = false;
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bool raw = false;
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int unit = -1;
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int opt;
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while ( (opt = getopt(argc, argv, "abegkmprt")) != -1 )
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{
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switch ( opt )
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{
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case 'a': all = true; break;
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case 'b': unit = BYTES; break;
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case 'e': unit = EXBI; break;
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case 'g': unit = GIBI; break;
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case 'k': unit = KIBI; break;
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case 'm': unit = MEBI; break;
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case 'p': unit = PEBI; break;
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case 'r': raw = true; break;
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case 't': unit = TEBI; break;
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default: return 1;
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}
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}
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const size_t MAX_COUNTERS = sizeof(memusages) / sizeof(memusages[0]);
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const struct memusage* usages[MAX_COUNTERS];
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size_t num_counters;
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size_t start_counter = 0;
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if ( all )
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{
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if ( optind < argc )
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errx(1, "extra operand: %s", argv[optind]);
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num_counters = MAX_COUNTERS;
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for ( size_t i = 0; i < num_counters; i++ )
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usages[i] = &memusages[i];
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}
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else if ( optind < argc )
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{
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num_counters = 1;
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start_counter = 1;
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usages[0] = &memusages[0];
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for ( int i = optind; i < argc; i++ )
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{
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if ( num_counters == MAX_COUNTERS )
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errx(1, "too many counters");
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bool found = false;
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for ( size_t n = 0; n < MAX_COUNTERS; n++ )
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{
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if ( strcmp(argv[i], memusages[n].name) != 0 )
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continue;
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usages[num_counters++] = &memusages[n];
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found = true;
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break;
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}
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if ( !found )
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errx(1, "unknown statistic: %s", argv[i]);
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}
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}
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else
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{
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num_counters = 2;
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usages[0] = &memusages[0];
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usages[1] = &memusages[1];
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}
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size_t counts[MAX_COUNTERS];
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for ( size_t i = 0; i < num_counters; i++ )
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counts[i] = usages[i]->counter;
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size_t values[MAX_COUNTERS];
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if ( memusage(counts, values, num_counters) )
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err(1, "memusage");
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if ( raw && unit == -1 )
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unit = BYTES;
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size_t total = values[0];
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size_t usage_width = 0;
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size_t name_width = 0;
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for ( size_t i = start_counter; i < num_counters; i++ )
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{
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size_t count = values[i];
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const char* name = usages[i]->name;
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char* usage = format_bytes_amount(count, unit, raw);
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if ( !usage )
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err(1, "malloc");
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size_t usage_len = strlen(usage);
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if ( usage_width < usage_len )
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usage_width = usage_len;
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size_t name_len = strlen(name);
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if ( name_width < name_len )
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name_width = name_len;
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free(usage);
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}
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for ( size_t i = start_counter; i < num_counters; i++ )
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{
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size_t count = values[i];
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const char* name = usages[i]->name;
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char* usage = format_bytes_amount(count, unit, raw);
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if ( !usage )
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err(1, "malloc");
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if ( raw )
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{
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if ( num_counters - start_counter == 1 )
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printf("%s\n", usage);
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else
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printf("%s %s\n", usage, name);
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}
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else
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{
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printf("%*s", (int) usage_width, usage);
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printf(" %-*s", (int) name_width, name);
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unsigned percent = ((uintmax_t) count * 100) / total;
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printf(" %3u%%\n", percent);
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}
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free(usage);
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}
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if ( ferror(stdout) || fflush(stdout) == EOF )
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err(1, "stdout");
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return 0;
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}
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