mirror of
https://github.com/jart/cosmopolitan.git
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1d8937d528
This change reduces the memory requirements of your APE Loader by 10x, in terms of virtual memory size, thanks to the help of alloca(). We're also now creating argument blocks with the same layout across systems.
106 lines
3.3 KiB
C
106 lines
3.3 KiB
C
#if 0
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/*─────────────────────────────────────────────────────────────────╗
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│ To the extent possible under law, Justine Tunney has waived │
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│ all copyright and related or neighboring rights to this file, │
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│ as it is written in the following disclaimers: │
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│ • http://unlicense.org/ │
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│ • http://creativecommons.org/publicdomain/zero/1.0/ │
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╚─────────────────────────────────────────────────────────────────*/
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#endif
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#include "libc/calls/struct/stat.h"
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#include "libc/calls/calls.h"
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#include "libc/errno.h"
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#include "libc/fmt/conv.h"
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#include "libc/fmt/fmt.h"
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#include "libc/log/check.h"
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#include "libc/log/log.h"
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#include "libc/mem/gc.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/s.h"
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#include "libc/x/xiso8601.h"
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/**
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* @fileoverview File metadata viewer.
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*
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* This demonstrates the more powerful aspects of the printf() DSL.
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*/
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bool numeric;
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const char *DescribeFileType(unsigned mode) {
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switch (mode & S_IFMT) {
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case S_IFIFO:
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return "S_IFIFO"; /* pipe */
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case S_IFCHR:
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return "S_IFCHR"; /* character device */
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case S_IFDIR:
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return "S_IFDIR"; /* directory */
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case S_IFBLK:
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return "S_IFBLK"; /* block device */
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case S_IFREG:
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return "S_IFREG"; /* regular file */
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case S_IFLNK:
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return "S_IFLNK"; /* symbolic link */
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case S_IFSOCK:
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return "S_IFSOCK"; /* socket */
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default:
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return "wut";
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}
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}
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void PrintFileMetadata(const char *pathname, struct stat *st) {
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int fd;
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printf("\n%s:", pathname);
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if (numeric) {
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fd = atoi(pathname);
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CHECK_NE(-1, fstat(fd, st), "fd=%d", fd);
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} else {
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CHECK_NE(-1, stat(pathname, st), "pathname=%s", pathname);
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}
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printf("\n"
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"%-32s%,ld\n"
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"%-32s%,ld\n"
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"%-32s%#lx\n"
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"%-32s%#lx\n"
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"%-32s%ld\n"
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"%-32s%#o (%s)\n"
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"%-32s%d\n"
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"%-32s%d\n"
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"%-32s%d\n"
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"%-32s%d\n"
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"%-32s%ld\n"
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"%-32s%ld\n"
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"%-32s%s\n"
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"%-32s%s\n"
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"%-32s%s\n"
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"%-32s%s\n",
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"bytes in file", st->st_size, "physical bytes", st->st_blocks * 512,
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"device id w/ file", st->st_dev, "inode", st->st_ino,
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"hard link count", st->st_nlink, "mode / permissions", st->st_mode,
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DescribeFileType(st->st_mode), "owner id", st->st_uid, "group id",
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st->st_gid, "flags", st->st_flags, "gen", st->st_gen,
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"device id (if special)", st->st_rdev, "block size", st->st_blksize,
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"access time", _gc(xiso8601(&st->st_atim)), "modified time",
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_gc(xiso8601(&st->st_mtim)), "c[omplicated]time",
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_gc(xiso8601(&st->st_ctim)), "birthtime",
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_gc(xiso8601(&st->st_birthtim)));
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}
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int main(int argc, char *argv[]) {
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size_t i;
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struct stat st;
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if (argc <= 1) {
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PrintFileMetadata(".", &st);
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return 0;
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}
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for (i = 1; i < argc; ++i) {
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if (!strcmp(argv[i], "-n")) {
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numeric = true;
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} else {
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PrintFileMetadata(argv[i], &st);
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}
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}
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return 0;
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}
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