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Sourcecode: bash version File versions

finfo.c

/*
 * finfo - print file info
 */

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <sys/types.h>
#include "posixstat.h"
#include <stdio.h>
#include <pwd.h>
#include <grp.h>
#include <errno.h>

#include "bashansi.h"
#include "shell.h"
#include "builtins.h"
#include "common.h"

#ifndef errno
extern int  errno;
#endif

extern char **make_builtin_argv ();

static int  printst();
static int  printsome();
static int  printfinfo();
static int  finfo_main();

extern int  sh_optind;
extern char *sh_optarg;
extern char *this_command_name;

static char *prog;
static int  pmask;

#define OPT_UID         0x00001
#define OPT_GID         0x00002
#define OPT_DEV         0x00004
#define OPT_INO         0x00008
#define OPT_PERM  0x00010
#define OPT_LNKNAM      0x00020
#define OPT_FID         0x00040
#define OPT_NLINK 0x00080
#define OPT_RDEV  0x00100
#define OPT_SIZE  0x00200
#define OPT_ATIME 0x00400
#define OPT_MTIME 0x00800
#define OPT_CTIME 0x01000
#define OPT_BLKSIZE     0x02000
#define OPT_BLKS  0x04000
#define OPT_FTYPE 0x08000
#define OPT_PMASK 0x10000
#define OPT_OPERM 0x20000

#define OPT_ASCII 0x1000000

#define OPTIONS         "acdgiflmnopsuACGMP:U"

static int
octal(s)
char  *s;
{
      int   r;

      r = *s - '0';
      while (*++s >= '0' && *s <= '7')
            r = (r * 8) + (*s - '0');
      return r;
}

static int
finfo_main(argc, argv)
int   argc;
char  **argv;
{
      register int      i;
      int   mode, flags, opt;

      sh_optind = 0;    /* XXX */
      prog = base_pathname(argv[0]);
      if (argc == 1) {
            builtin_usage();
            return(1);
      }
      flags = 0;
      while ((opt = sh_getopt(argc, argv, OPTIONS)) != EOF) {
            switch(opt) {
            case 'a': flags |= OPT_ATIME; break;
            case 'A': flags |= OPT_ATIME|OPT_ASCII; break;
            case 'c': flags |= OPT_CTIME; break;
            case 'C': flags |= OPT_CTIME|OPT_ASCII; break;
            case 'd': flags |= OPT_DEV; break;
            case 'i': flags |= OPT_INO; break;
            case 'f': flags |= OPT_FID; break;
            case 'g': flags |= OPT_GID; break;
            case 'G': flags |= OPT_GID|OPT_ASCII; break;
            case 'l': flags |= OPT_LNKNAM; break;
            case 'm': flags |= OPT_MTIME; break;
            case 'M': flags |= OPT_MTIME|OPT_ASCII; break;
            case 'n': flags |= OPT_NLINK; break;
            case 'o': flags |= OPT_OPERM; break;
            case 'p': flags |= OPT_PERM; break;
            case 'P': flags |= OPT_PMASK; pmask = octal(sh_optarg); break;
            case 's': flags |= OPT_SIZE; break;
            case 'u': flags |= OPT_UID; break;
            case 'U': flags |= OPT_UID|OPT_ASCII; break;
            default: builtin_usage (); return(1);
            }
      }

      argc -= sh_optind;
      argv += sh_optind;

      if (argc == 0) {
            builtin_usage();
            return(1);
      }

      for (i = 0; i < argc; i++)
            opt = flags ? printsome (argv[i], flags) : printfinfo(argv[i]);

      return(opt);
}

static struct stat *
getstat(f)
char  *f;
{
      static struct stat st;
      int   fd, r;
      intmax_t lfd;

      if (strncmp(f, "/dev/fd/", 8) == 0) {
            if ((legal_number(f + 8, &lfd) == 0) || (int)lfd != lfd) {
                  builtin_error("%s: invalid fd", f + 8);
                  return ((struct stat *)0);
            }
            fd = lfd;
            r = fstat(fd, &st);
      } else
#ifdef HAVE_LSTAT
            r = lstat(f, &st);
#else
            r = stat(f, &st);
#endif
      if (r < 0) {
            builtin_error("%s: cannot stat: %s", f, strerror(errno));
            return ((struct stat *)0);
      }
      return (&st);
}

static int
printfinfo(f)
char  *f;
{
      struct stat *st;

      st = getstat(f);
      return (st ? printst(st) : 1);
}

static int
getperm(m)
int   m;
{
      return (m & (S_IRWXU|S_IRWXG|S_IRWXO|S_ISUID|S_ISGID));
}

static int
perms(m)
int   m;
{
      char ubits[4], gbits[4], obits[4];  /* u=rwx,g=rwx,o=rwx */
      int i;

      i = 0;
      if (m & S_IRUSR)
            ubits[i++] = 'r';
      if (m & S_IWUSR)
            ubits[i++] = 'w';
      if (m & S_IXUSR)
            ubits[i++] = 'x';
      ubits[i] = '\0';

      i = 0;
      if (m & S_IRGRP)
            gbits[i++] = 'r';
      if (m & S_IWGRP)
            gbits[i++] = 'w';
      if (m & S_IXGRP)
            gbits[i++] = 'x';
      gbits[i] = '\0';

      i = 0;
      if (m & S_IROTH)
            obits[i++] = 'r';
      if (m & S_IWOTH)
            obits[i++] = 'w';
      if (m & S_IXOTH)
            obits[i++] = 'x';
      obits[i] = '\0';

      if (m & S_ISUID)
            ubits[2] = (m & S_IXUSR) ? 's' : 'S';
      if (m & S_ISGID)
            gbits[2] = (m & S_IXGRP) ? 's' : 'S';
      if (m & S_ISVTX)
            obits[2] = (m & S_IXOTH) ? 't' : 'T';

      printf ("u=%s,g=%s,o=%s", ubits, gbits, obits);
}

static int
printmode(mode)
int   mode;
{
      if (S_ISBLK(mode))
            printf("S_IFBLK ");
      if (S_ISCHR(mode))
            printf("S_IFCHR ");
      if (S_ISDIR(mode))
            printf("S_IFDIR ");
      if (S_ISREG(mode))
            printf("S_IFREG ");
      if (S_ISFIFO(mode))
            printf("S_IFIFO ");
      if (S_ISLNK(mode))
            printf("S_IFLNK ");
      if (S_ISSOCK(mode))
            printf("S_IFSOCK ");
#ifdef S_ISWHT
      if (S_ISWHT(mode))
            printf("S_ISWHT ");
#endif
      perms(getperm(mode));
      printf("\n");
}

static int  
printst(st)
struct stat *st;
{
      struct passwd     *pw;
      struct group      *gr;
      char  *owner;

      printf("Device (major/minor): %d (%d/%d)\n", (int) (st->st_dev & 0xFF),
                                         (int) major (st->st_dev),
                                         (int) minor (st->st_dev));
      printf("Inode: %d\n", (int) st->st_ino);
      printf("Mode: (%o) ", (int) st->st_mode);
      printmode((int) st->st_mode);
      printf("Link count: %d\n", (int) st->st_nlink);
      pw = getpwuid(st->st_uid);
      owner = pw ? pw->pw_name : "unknown";
      printf("Uid of owner: %d (%s)\n", (int) st->st_uid, owner);
      gr = getgrgid(st->st_gid);
      owner = gr ? gr->gr_name : "unknown";
      printf("Gid of owner: %d (%s)\n", (int) st->st_gid, owner);
      printf("Device type: %d\n", (int) st->st_rdev);
      printf("File size: %ld\n", (long) st->st_size);
      printf("File last access time: %s", ctime (&st->st_atime));
      printf("File last modify time: %s", ctime (&st->st_mtime));
      printf("File last status change time: %s", ctime (&st->st_ctime));
      fflush(stdout);
      return(0);
}

static int
printsome(f, flags)
char  *f;
int   flags;
{
      struct stat *st;
      struct passwd *pw;
      struct group *gr;
      int   p;
      char  *b;

      st = getstat(f);
      if (st == NULL)
            return (1);

      /* Print requested info */
      if (flags & OPT_ATIME) {
            if (flags & OPT_ASCII)
                  printf("%s", ctime(&st->st_atime));
            else
                  printf("%ld\n", st->st_atime);
      } else if (flags & OPT_MTIME) {
            if (flags & OPT_ASCII)
                  printf("%s", ctime(&st->st_mtime));
            else
                  printf("%ld\n", st->st_mtime);
      } else if (flags & OPT_CTIME) {
            if (flags & OPT_ASCII)
                  printf("%s", ctime(&st->st_ctime));
            else
                  printf("%ld\n", st->st_ctime);
      } else if (flags & OPT_DEV)
            printf("%d\n", st->st_dev);
      else if (flags & OPT_INO)
            printf("%d\n", st->st_ino);
      else if (flags & OPT_FID)
            printf("%d:%ld\n", st->st_dev, st->st_ino);
      else if (flags & OPT_NLINK)
            printf("%d\n", st->st_nlink);
      else if (flags & OPT_LNKNAM) {
#ifdef S_ISLNK
            b = xmalloc(4096);
            p = readlink(f, b, 4096);
            if (p >= 0 && p < 4096)
                  b[p] = '\0';
            else {
                  p = errno;
                  strcpy(b, prog);
                  strcat(b, ": ");
                  strcat(b, strerror(p));
            }
            printf("%s\n", b);
            free(b);
#else
            printf("%s\n", f);
#endif
      } else if (flags & OPT_PERM) {
            perms(st->st_mode);
            printf("\n");
      } else if (flags & OPT_OPERM)
            printf("%o\n", getperm(st->st_mode));
      else if (flags & OPT_PMASK)
            printf("%o\n", getperm(st->st_mode) & pmask);
      else if (flags & OPT_UID) {
            pw = getpwuid(st->st_uid);
            if (flags & OPT_ASCII)
                  printf("%s\n", pw ? pw->pw_name : "unknown");
            else
                  printf("%d\n", st->st_uid);
      } else if (flags & OPT_GID) {
            gr = getgrgid(st->st_gid);
            if (flags & OPT_ASCII)
                  printf("%s\n", gr ? gr->gr_name : "unknown");
            else
                  printf("%d\n", st->st_gid);
      } else if (flags & OPT_SIZE)
            printf("%ld\n", st->st_size);

      return (0);
}

#ifndef NOBUILTIN
int
finfo_builtin(list)
     WORD_LIST *list;
{
  int c, r;
  char **v;
  WORD_LIST *l;

  v = make_builtin_argv (list, &c);
  r = finfo_main (c, v);
  free (v);

  return r;
}

static char *finfo_doc[] = {
  "Display information about each FILE.  Only single operators should",
  "be supplied.  If no options are supplied, a summary of the info",
  "available about each FILE is printed.  If FILE is of the form",
  "/dev/fd/XX, file descriptor XX is described.  Operators, if supplied,",
  "have the following meanings:",
  "",
  "   -a    last file access time",
  "   -A    last file access time in ctime format",
  "   -c    last file status change time",
  "   -C    last file status change time in ctime format",
  "   -m    last file modification time",
  "   -M    last file modification time in ctime format",
  "   -d    device",
  "   -i    inode",
  "   -f    composite file identifier (device:inode)",
  "   -g    gid of owner",
  "   -G    group name of owner",
  "   -l    name of file pointed to by symlink",
  "   -n    link count",
  "   -o    permissions in octal",
  "   -p    permissions in ascii",
  "   -P mask permissions ANDed with MASK (like with umask)",
  "   -s    file size in bytes",
  "   -u    uid of owner",
  "   -U    user name of owner",
  (char *)0
};

struct builtin finfo_struct = {
      "finfo",
      finfo_builtin,
      BUILTIN_ENABLED,
      finfo_doc,
      "finfo [-acdgiflmnopsuACGMPU] file [file...]",
      0
};
#endif

#ifdef NOBUILTIN
#if defined (PREFER_STDARG)
#  include <stdarg.h>
#else
#  if defined (PREFER_VARARGS)
#    include <varargs.h>
#  endif
#endif

char *this_command_name;

main(argc, argv)
int   argc;
char  **argv;
{
      this_command_name = argv[0];
      exit(finfo_main(argc, argv));
}

void
builtin_usage()
{
      fprintf(stderr, "%s: usage: %s [-%s] [file ...]\n", prog, OPTIONS);
}

#ifndef HAVE_STRERROR
char *
strerror(e)
int   e;
{
      static char ebuf[40];
      extern int  sys_nerr;
      extern char *sys_errlist[];

      if (e < 0 || e > sys_nerr) {
            sprintf(ebuf,"Unknown error code %d", e);
            return (&ebuf[0]);
      }
      return (sys_errlist[e]);
}
#endif

char *
xmalloc(s)
size_t      s;
{
      char  *ret;
      extern char *malloc();

      ret = malloc(s);
      if (ret)
            return (ret);
      fprintf(stderr, "%s: cannot malloc %d bytes\n", prog, s);
      exit(1);
}

char *
base_pathname(p)
char  *p;
{
      char  *t;

      if (t = strrchr(p, '/'))
            return(++t);
      return(p);
}

int
legal_number (string, result)
     char *string;
     long *result;
{
  int sign;
  long value;

  sign = 1;
  value = 0;

  if (result)
    *result = 0;

  /* Skip leading whitespace characters. */
  while (whitespace (*string))
    string++;

  if (!*string)
    return (0);

  /* We allow leading `-' or `+'. */
  if (*string == '-' || *string == '+')
    {
      if (!digit (string[1]))
        return (0);

      if (*string == '-')
        sign = -1;

      string++;
    }

  while (digit (*string))
    {
      if (result)
        value = (value * 10) + digit_value (*string);
      string++;
    }

  /* Skip trailing whitespace, if any. */
  while (whitespace (*string))
    string++;

  /* Error if not at end of string. */
  if (*string)
    return (0);

  if (result)
    *result = value * sign;

  return (1);
}

int sh_optind;
char *sh_optarg;
int sh_opterr;

extern int optind;
extern char *optarg;

int
sh_getopt(c, v, o)
int   c;
char  **v, *o;
{
      int   r;

      r = getopt(c, v, o);
      sh_optind = optind;
      sh_optarg = optarg;
      return r;
}

#if defined (USE_VARARGS)
void
#if defined (PREFER_STDARG)
builtin_error (const char *format, ...)
#else
builtin_error (format, va_alist)
     const char *format;
     va_dcl
#endif
{
  va_list args;

  if (this_command_name && *this_command_name)
    fprintf (stderr, "%s: ", this_command_name);

#if defined (PREFER_STDARG)
  va_start (args, format);
#else
  va_start (args);
#endif

  vfprintf (stderr, format, args);
  va_end (args);
  fprintf (stderr, "\n");
}
#else
void
builtin_error (format, arg1, arg2, arg3, arg4, arg5)
     char *format, *arg1, *arg2, *arg3, *arg4, *arg5;
{
  if (this_command_name && *this_command_name)
    fprintf (stderr, "%s: ", this_command_name);

  fprintf (stderr, format, arg1, arg2, arg3, arg4, arg5);
  fprintf (stderr, "\n");
  fflush (stderr);
}
#endif /* !USE_VARARGS */

#endif

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