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- /* listfile.c -- display a long listing of a file
- Copyright (C) 1985, 1988, 1991 Free Software Foundation, Inc.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include <stdio.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #ifndef S_ISCHR
- #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
- #endif
- #ifndef S_ISBLK
- #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
- #endif
- #if defined(S_IFLNK) && !defined(S_ISLNK)
- #define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
- #endif
-
- /* Extract or fake data from a `struct stat'.
- ST_NBLOCKS: Number of 512-byte blocks in the file
- (including indirect blocks). */
- #ifdef _POSIX_SOURCE
- #define ST_NBLOCKS(statp) (((statp)->st_size + 512 - 1) / 512)
- #else /* !_POSIX_SOURCE */
- #ifndef HAVE_ST_BLOCKS
- #define ST_NBLOCKS(statp) (st_blocks ((statp)->st_size))
- #else /* HAVE_ST_BLOCKS */
- #if defined(hpux) || defined(__hpux__)
- /* HP-UX, perhaps uniquely, counts st_blocks in 1024-byte units.
- This loses when mixing HP-UX and 4BSD filesystems, though. */
- #define ST_NBLOCKS(statp) ((statp)->st_blocks * 2)
- #else /* !hpux */
- #define ST_NBLOCKS(statp) ((statp)->st_blocks)
- #endif /* hpux */
- #endif /* HAVE_ST_BLOCKS */
- #endif /* _POSIX_SOURCE */
-
- /* Convert B 512-byte blocks to kilobytes if K is nonzero,
- otherwise return it unchanged. */
- #define convert_blocks(b, k) ((k) ? ((b) + 1) / 2 : (b))
-
- #ifdef HAVE_UNISTD_H
- #include <unistd.h>
- #endif
-
- #include <pwd.h>
- #include <grp.h>
- #ifndef _POSIX_VERSION
- struct passwd *getpwuid ();
- struct group *getgrgid ();
- #endif
-
- #include <time.h>
-
- #if defined(HAVE_STRING_H) || defined(STDC_HEADERS)
- #include <string.h>
- #else
- #include <strings.h>
- #endif
-
- /* Since major is a function on SVR4, we can't use `ifndef major'. */
- #ifdef MAJOR_IN_MKDEV
- #include <sys/mkdev.h>
- #define HAVE_MAJOR
- #endif
- #ifdef MAJOR_IN_SYSMACROS
- #include <sys/sysmacros.h>
- #define HAVE_MAJOR
- #endif
- #ifdef major /* Might be defined in sys/types.h. */
- #define HAVE_MAJOR
- #endif
-
- #ifndef HAVE_MAJOR
- #define major(dev) (((dev) >> 8) & 0xff)
- #define minor(dev) ((dev) & 0xff)
- #endif
- #undef HAVE_MAJOR
-
- #include <errno.h>
- #ifdef STDC_HEADERS
- #include <stdlib.h>
- #else
- char *getenv ();
- extern int errno;
- #endif
-
- #if defined(S_ISLNK)
- int readlink ();
- #endif
-
- char *xmalloc ();
- void error ();
- void mode_string ();
-
- char *get_link_name ();
- char *getgroup ();
- char *getuser ();
- void print_name_with_quoting ();
-
- void
- list_file (name, statp)
- char *name;
- struct stat *statp;
- {
- static int kilobytes = -1; /* -1 = uninitialized, 0 = 512, 1 = 1024. */
- char modebuf[20];
- char timebuf[40];
- time_t current_time = time ((time_t *) 0);
-
- if (kilobytes == -1)
- kilobytes = getenv ("POSIXLY_CORRECT") == 0;
-
- mode_string (statp->st_mode, modebuf);
- modebuf[10] = '\0';
-
- strcpy (timebuf, ctime (&statp->st_mtime));
- if (current_time > statp->st_mtime + 6L * 30L * 24L * 60L * 60L /* Old. */
- || current_time < statp->st_mtime - 60L * 60L) /* In the future. */
- {
- /* The file is fairly old or in the future.
- POSIX says the cutoff is 6 months old;
- approximate this by 6*30 days.
- Allow a 1 hour slop factor for what is considered "the future",
- to allow for NFS server/client clock disagreement.
- Show the year instead of the time of day. */
- strcpy (timebuf + 11, timebuf + 19);
- }
- timebuf[16] = 0;
-
- printf ("%6u ", statp->st_ino);
-
- printf ("%4u ", convert_blocks (ST_NBLOCKS (statp), kilobytes));
-
- /* The space between the mode and the number of links is the POSIX
- "optional alternate access method flag". */
- printf ("%s %3u ", modebuf, statp->st_nlink);
-
- printf ("%-8.8s ", getuser (statp->st_uid));
-
- printf ("%-8.8s ", getgroup (statp->st_gid));
-
- if (S_ISCHR (statp->st_mode) || S_ISBLK (statp->st_mode))
- #ifdef HAVE_ST_RDEV
- printf ("%3u, %3u ", major (statp->st_rdev), minor (statp->st_rdev));
- #else
- printf (" ");
- #endif
- else
- printf ("%8lu ", statp->st_size);
-
- printf ("%s ", timebuf + 4);
-
- print_name_with_quoting (name);
-
- #ifdef S_IFLNK
- if (S_ISLNK (statp->st_mode))
- {
- char *linkname = get_link_name (name, statp);
-
- if (linkname)
- {
- fputs (" -> ", stdout);
- print_name_with_quoting (linkname);
- free (linkname);
- }
- }
- #endif
- putchar ('\n');
- }
-
- void
- print_name_with_quoting (p)
- register char *p;
- {
- register unsigned char c;
-
- while ((c = *p++) != '\0')
- {
- switch (c)
- {
- case '\\':
- printf ("\\\\");
- break;
-
- case '\n':
- printf ("\\n");
- break;
-
- case '\b':
- printf ("\\b");
- break;
-
- case '\r':
- printf ("\\r");
- break;
-
- case '\t':
- printf ("\\t");
- break;
-
- case '\f':
- printf ("\\f");
- break;
-
- case ' ':
- printf ("\\ ");
- break;
-
- case '"':
- printf ("\\\"");
- break;
-
- default:
- if (c > 040 && c < 0177)
- putchar (c);
- else
- printf ("\\%03o", (unsigned int) c);
- }
- }
- }
-
- #ifdef S_IFLNK
- char *
- get_link_name (filename, statp)
- char *filename;
- struct stat *statp;
- {
- register char *linkbuf;
- register int bufsiz = statp->st_size;
-
- linkbuf = (char *) xmalloc (bufsiz + 1);
- linkbuf[bufsiz] = 0;
- if (readlink (filename, linkbuf, bufsiz) < 0)
- {
- error (0, errno, "%s", filename);
- free (linkbuf);
- return 0;
- }
- return linkbuf;
- }
- #endif
-