view toys.h @ 912:f4f5132d5ac7

Stat cleanup. From the mailing list: Ok, first thing: clean up the help text. I realize what's there is copied verbatim from the man page, but that man page sucks. ("modification time" vs "change time"?) Took a bit of finagling to fit it in 80x24, but just made it. GLOBALS() indent was still tab, change to two spaces. And I tend to put a blank line between options lib/args.c automatically fills out and normal globals. We never do anything with date_stat_format() but immediately print it, might as well make the function do it. The types[] array in do_stat() is a rough edge. Hmmm... there's no else case that sets the type in case it was unknown (such as 0). In theory, this never happens. In practice it means I can cheat slightly, given this observation: $ find linux -name stat.h | xargs grep 'S_IF[A-Z]*[ \t]' linux/include/uapi/linux/stat.h:#define S_IFMT 00170000 linux/include/uapi/linux/stat.h:#define S_IFSOCK 0140000 linux/include/uapi/linux/stat.h:#define S_IFLNK 0120000 linux/include/uapi/linux/stat.h:#define S_IFREG 0100000 linux/include/uapi/linux/stat.h:#define S_IFBLK 0060000 linux/include/uapi/linux/stat.h:#define S_IFDIR 0040000 linux/include/uapi/linux/stat.h:#define S_IFCHR 0020000 linux/include/uapi/linux/stat.h:#define S_IFIFO 0010000 I.E. the only place the I_IFBLAH constants occur a stat.h header in current linux code is in the generic stuff, it doesn't vary per target. (The access permission bits are actually subtly standardized in posix due to the command line arguments to chmod, although I'm sure cygwin finds a way to break. But the type fields, not so much. But linux has to be binary compatible with itself foreverish, and that's all I really care about.) So, we have ALMOST have this going by twos, except there's no 8 and there is a 1. so let's make the 1 the default, feed a blank string into the 8... No, duh: octal. So it's actually 2, 4, 6, 8, 10, 12. So make the loop look like: filetype = statf->st_mode & S_IFMT; TT.ftname = types; for (i = 1; filetype != (i*8192) && i < 7; i++) TT.ftname += strlen(TT.ftname)+1; Yes that's linux-specific, and I think I'm ok with that. Printing all zeroes and pretending that's nanosecond resolution... either support it or don't. Let's see, supporting it is stat->st_atim.tv_nsec and similar... no mention of nanoseconds in strftime() (et tu, posix2008?) so pass it as a second argument and append it by hand... (Need to test that against musl...) When we hit an unknown type in print_it() we print the literal character, which is right for %% but what about an unknown option? $ stat -c %q / ? Eh, I guess that's a "don't care". It didn't die with an error, that's the important thing. I have a horrible idea for compressing the switch/case blocks, but should probably check this in and get some sleep for right now...
author Rob Landley <>
date Tue, 28 May 2013 00:28:45 -0500
parents d90f14e011b8
children d7bd69bec519
line wrap: on
line source

/* Toybox infrastructure.
 * Copyright 2006 Rob Landley <>

#include "generated/config.h"

#include "lib/portability.h"

#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <inttypes.h>
#include <limits.h>
#include <libgen.h>
#include <math.h>
#include <pty.h>
#include <pwd.h>
#include <sched.h>
#include <setjmp.h>
#include <sched.h>
#include <shadow.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/statfs.h>
#include <sys/statvfs.h>
#include <sys/sysinfo.h>
#include <sys/swap.h>
#include <sys/time.h>
#include <sys/times.h>
#include <sys/types.h>
#include <sys/utsname.h>
#include <sys/wait.h>
#include <syslog.h>
#include <time.h>
#include <unistd.h>
#include <utime.h>
#include <utmpx.h>

// Internationalization support

#include <locale.h>
#include <wchar.h>
#include <wctype.h>

#include "lib/lib.h"
#include "toys/e2fs.h"

// Get list of function prototypes for all enabled command_main() functions.

#define NEWTOY(name, opts, flags) void name##_main(void);
#define OLDTOY(name, oldname, opts, flags)
#include "generated/newtoys.h"
#include "generated/globals.h"

// These live in main.c

struct toy_list *toy_find(char *name);
void toy_init(struct toy_list *which, char *argv[]);
void toy_exec(char *argv[]);

// Flags describing command behavior.

#define TOYFLAG_USR      (1<<0)
#define TOYFLAG_BIN      (1<<1)
#define TOYFLAG_SBIN     (1<<2)
#define TOYMASK_LOCATION ((1<<4)-1)

// This is a shell built-in function, running in the same process context.
#define TOYFLAG_NOFORK   (1<<4)

// Start command with a umask of 0 (saves old umask in this.old_umask)
#define TOYFLAG_UMASK    (1<<5)

// This command runs as root.
#define TOYFLAG_STAYROOT (1<<6)
#define TOYFLAG_NEEDROOT (1<<7)

// Array of available commands

extern struct toy_list {
  char *name;
  void (*toy_main)(void);
  char *options;
  int flags;
} toy_list[];

// Global context shared by all commands.

extern struct toy_context {
  struct toy_list *which;  // Which entry in toy_list is this one?
  int exitval;             // Value error_exit feeds to exit()
  char **argv;             // Original command line arguments
  unsigned optflags;       // Command line option flags from get_optflags()
  char **optargs;          // Arguments left over from get_optflags()
  int optc;                // Count of optargs
  int exithelp;            // Should error_exit print a usage message first?
  int old_umask;           // Old umask preserved by TOYFLAG_UMASK
  jmp_buf *rebound;        // longjmp here instead of exit when do_rebound set
} toys;

// One big temporary buffer, for use by commands (not library functions).

extern char toybuf[4096];

#define GLOBALS(...)

#define ARRAY_LEN(array) (sizeof(array)/sizeof(*array))