findutils-4.6.0HEADfindutils-4.6.0master

1 files changed, 529 insertions, 0 deletions

diff --git a/lib/listfile.c b/lib/listfile.c
new file mode 100644
index 0000000..01a4ed7
--- /dev/null
+++ b/lib/listfile.c
@@ -0,0 +1,529 @@
+/* listfile.c -- display a long listing of a file
+   Copyright (C) 1991, 1993, 2000, 2004, 2005, 2007, 2008, 2010, 2011
+   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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
+*/
+/* config.h must be included first. */
+#include <config.h>
+
+/* system headers. */
+#include <alloca.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <grp.h>
+#include <locale.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h> /* for readlink() */
+
+/* gnulib headers. */
+#include "areadlink.h"
+#include "error.h"
+#include "filemode.h"
+#include "human.h"
+#include "mbswidth.h"
+#include "idcache.h"
+#include "pathmax.h"
+#include "stat-size.h"
+#include "gettext.h"
+
+/* find headers. */
+#include "listfile.h"
+
+/* 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
+
+#if ENABLE_NLS
+# include <libintl.h>
+# define _(Text) gettext (Text)
+#else
+# define _(Text) Text
+#endif
+#ifdef gettext_noop
+# define N_(String) gettext_noop (String)
+#else
+/* See locate.c for explanation as to why not use (String) */
+# define N_(String) String
+#endif
+
+static bool print_name (register const char *p, FILE *stream, int literal_control_chars);
+
+/* We have some minimum field sizes, though we try to widen these fields on systems
+ * where we discover examples where the field width we started with is not enough. */
+static int inode_number_width = 9;
+static int block_size_width = 6;
+static int nlink_width = 3;
+static int owner_width = 8;
+static int group_width = 8;
+/* We don't print st_author even if the system has it. */
+static int major_device_number_width = 3;
+static int minor_device_number_width = 3;
+static int file_size_width = 8;
+
+static bool print_num(FILE *stream, unsigned long num, int *width)
+{
+  const int chars_out = fprintf (stream, "%*lu", *width, num);
+  if (chars_out >= 0)
+    {
+      if (*width < chars_out)
+        *width = chars_out;
+      return true;
+    }
+  return false;
+}
+
+
+/* NAME is the name to print.
+   RELNAME is the path to access it from the current directory.
+   STATP is the results of stat or lstat on it.
+   Use CURRENT_TIME to decide whether to print yyyy or hh:mm.
+   Use OUTPUT_BLOCK_SIZE to determine how to print file block counts
+   and sizes.
+   STREAM is the stdio stream to print on.  */
+
+void
+list_file (const char *name,
+           int dir_fd,
+           char *relname,
+           const struct stat *statp,
+           time_t current_time,
+           int output_block_size,
+           int literal_control_chars,
+           FILE *stream)
+{
+  char modebuf[12];
+  struct tm const *when_local;
+  char const *user_name;
+  char const *group_name;
+  char hbuf[LONGEST_HUMAN_READABLE + 1];
+  bool output_good = true;
+  int chars_out;
+  int failed_at = 000;
+  int inode_field_width;
+
+#if HAVE_ST_DM_MODE
+  /* Cray DMF: look at the file's migrated, not real, status */
+  strmode (statp->st_dm_mode, modebuf);
+#else
+  strmode (statp->st_mode, modebuf);
+#endif
+
+  chars_out = fprintf (stream, "%*s", inode_number_width,
+                       human_readable ((uintmax_t) statp->st_ino, hbuf,
+                                       human_ceiling,
+                                       1u, 1u));
+  if (chars_out < 0)
+    {
+      output_good = false;
+      failed_at = 100;
+    }
+  else if (chars_out > inode_number_width)
+    {
+      inode_number_width = chars_out;
+    }
+  if (output_good)
+    {
+      if (EOF == putc(' ', stream))
+        {
+          output_good = false;
+          failed_at = 150;
+        }
+      chars_out = fprintf (stream, "%*s",
+                           block_size_width,
+                           human_readable ((uintmax_t) ST_NBLOCKS (*statp), hbuf,
+                                           human_ceiling,
+                                           ST_NBLOCKSIZE, output_block_size));
+      if (chars_out < 0)
+        {
+          output_good = false;
+          failed_at = 200;
+        }
+      else
+        {
+          if (chars_out > block_size_width)
+            block_size_width = chars_out;
+        }
+    }
+
+  if (output_good)
+    {
+      if (EOF == putc(' ', stream))
+        {
+          output_good = false;
+          failed_at = 250;
+        }
+      /* modebuf includes the space between the mode and the number of links,
+         as the POSIX "optional alternate access method flag".  */
+      if (fprintf (stream, "%s%3lu ", modebuf, (unsigned long) statp->st_nlink) < 0)
+        {
+          output_good = false;
+          failed_at = 300;
+        }
+    }
+
+  if (output_good)
+    {
+      if (EOF == putc(' ', stream))
+        {
+          output_good = false;
+          failed_at = 250;
+        }
+      user_name = getuser (statp->st_uid);
+      if (user_name)
+        {
+          int len = mbswidth (user_name, 0);
+          if (len > owner_width)
+            owner_width = len;
+          output_good = (fprintf (stream, "%-*s ", owner_width, user_name) >= 0);
+          if (!output_good)
+            failed_at = 400;
+        }
+      else
+        {
+          chars_out = fprintf (stream, "%-8lu ", (unsigned long) statp->st_uid);
+          if (chars_out > owner_width)
+            owner_width = chars_out;
+          output_good = (chars_out > 0);
+          if (!output_good)
+            failed_at = 450;
+        }
+    }
+
+  if (output_good)
+    {
+      group_name = getgroup (statp->st_gid);
+      if (group_name)
+        {
+          int len = mbswidth (group_name, 0);
+          if (len > group_width)
+            group_width = len;
+          output_good = (fprintf (stream, "%-*s ", group_width, group_name) >= 0);
+          if (!output_good)
+            failed_at = 500;
+        }
+      else
+        {
+          chars_out = fprintf (stream, "%-*lu",
+                               group_width, (unsigned long) statp->st_gid);
+          if (chars_out > group_width)
+            group_width = chars_out;
+          output_good = (chars_out >= 0);
+          if (output_good)
+            {
+              if (EOF == putc(' ', stream))
+                {
+                  output_good = false;
+                  failed_at = 525;
+                }
+            }
+          else
+            {
+              if (!output_good)
+                failed_at = 550;
+            }
+        }
+    }
+
+  if (output_good)
+    {
+      if (S_ISCHR (statp->st_mode) || S_ISBLK (statp->st_mode))
+        {
+#ifdef HAVE_STRUCT_STAT_ST_RDEV
+          if (!print_num (stream,
+                          (unsigned long) major (statp->st_rdev),
+                          &major_device_number_width))
+            {
+              output_good = false;
+              failed_at = 600;
+            }
+          if (output_good)
+            {
+              if (fprintf (stream, ", ") < 0)
+                {
+                  output_good = false;
+                  failed_at = 625;
+                }
+            }
+          if (output_good)
+            {
+              if (!print_num (stream,
+                              (unsigned long) minor (statp->st_rdev),
+                              &minor_device_number_width))
+                {
+                  output_good = false;
+                  failed_at = 650;
+                }
+            }
+#else
+          if (fprintf (stream, "%*s  %*s",
+                       major_device_number_width,
+                       minor_device_number_width) < 0)
+            {
+              output_good = false;
+              failed_at = 700;
+            }
+#endif
+        }
+      else
+        {
+          const int blocksize = output_block_size < 0 ? output_block_size : 1;
+          chars_out = fprintf (stream, "%*s",
+                               file_size_width,
+                               human_readable ((uintmax_t) statp->st_size, hbuf,
+                                               human_ceiling,
+                                               1, blocksize));
+          if (chars_out < 0)
+            {
+              output_good = false;
+              failed_at = 800;
+            }
+          else
+            {
+              if (chars_out > file_size_width)
+                {
+                  file_size_width = chars_out;
+                }
+            }
+        }
+    }
+
+  if (output_good)
+    {
+      if (EOF == putc(' ', stream))
+        {
+          output_good = false;
+          failed_at = 850;
+        }
+    }
+
+  if (output_good)
+    {
+      if ((when_local = localtime (&statp->st_mtime)))
+        {
+          char init_bigbuf[256];
+          char *buf = init_bigbuf;
+          size_t bufsize = sizeof init_bigbuf;
+
+          /* Use strftime rather than ctime, because the former can produce
+             locale-dependent names for the month (%b).
+
+             Output the year if 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.  */
+          char const *fmt =
+            ((current_time - 6 * 30 * 24 * 60 * 60 <= statp->st_mtime
+              && statp->st_mtime <= current_time + 60 * 60)
+             ? "%b %e %H:%M"
+             : "%b %e  %Y");
+
+          while (!strftime (buf, bufsize, fmt, when_local))
+            buf = alloca (bufsize *= 2);
+
+          if (fprintf (stream, "%s ", buf) < 0)
+            {
+              output_good = false;
+              failed_at = 900;
+            }
+        }
+      else
+        {
+          /* The time cannot be represented as a local time;
+             print it as a huge integer number of seconds.  */
+          int width = 12;
+
+          if (statp->st_mtime < 0)
+            {
+              char const *num = human_readable (- (uintmax_t) statp->st_mtime,
+                                                hbuf, human_ceiling, 1, 1);
+              int sign_width = width - strlen (num);
+              if (fprintf (stream, "%*s%s ",
+                           sign_width < 0 ? 0 : sign_width, "-", num) < 0)
+                {
+                  output_good = false;
+                  failed_at = 1000;
+                }
+            }
+          else
+            {
+              if (fprintf (stream, "%*s ", width,
+                           human_readable ((uintmax_t) statp->st_mtime, hbuf,
+                                           human_ceiling,
+                                           1, 1)) < 0)
+                {
+                  output_good = false;
+                  failed_at = 1100;
+                }
+            }
+        }
+    }
+
+  if (output_good)
+    {
+      output_good = print_name (name, stream, literal_control_chars);
+      if (!output_good)
+        {
+          failed_at = 1200;
+        }
+    }
+
+  if (output_good)
+    {
+      if (S_ISLNK (statp->st_mode))
+        {
+          char *linkname = areadlinkat (dir_fd, relname);
+          if (linkname)
+            {
+              if (fputs (" -> ", stream) < 0)
+                {
+                  output_good = false;
+                  failed_at = 1300;
+                }
+              if (output_good)
+                {
+                  output_good = print_name (linkname, stream, literal_control_chars);
+                  if (!output_good)
+                    {
+                      failed_at = 1350;
+                    }
+                }
+            }
+          else
+            {
+              /* POSIX requires in the case of find that if we issue a
+               * diagnostic we should have a nonzero status.  However,
+               * this function doesn't have a way of telling the caller to
+               * do that.  However, since this function is only used when
+               * processing "-ls", we're already using an extension.
+               */
+              error (0, errno, "%s", name);
+            }
+          free (linkname);
+        }
+      if (output_good)
+        {
+          if (EOF == putc ('\n', stream))
+            {
+              output_good = false;
+              if (!output_good)
+                {
+                  failed_at = 1400;
+                }
+            }
+        }
+    }
+  if (!output_good)
+    {
+      error (EXIT_FAILURE, errno, _("Failed to write output (at stage %d)"), failed_at);
+    }
+}
+
+
+static bool
+print_name_without_quoting (const char *p, FILE *stream)
+{
+  return (fprintf (stream, "%s", p) >= 0);
+}
+
+
+static bool
+print_name_with_quoting (register const char *p, FILE *stream)
+{
+  register unsigned char c;
+
+  while ((c = *p++) != '\0')
+    {
+      int fprintf_result = -1;
+      switch (c)
+        {
+        case '\\':
+          fprintf_result = fprintf (stream, "\\\\");
+          break;
+
+        case '\n':
+          fprintf_result = fprintf (stream, "\\n");
+          break;
+
+        case '\b':
+          fprintf_result = fprintf (stream, "\\b");
+          break;
+
+        case '\r':
+          fprintf_result = fprintf (stream, "\\r");
+          break;
+
+        case '\t':
+          fprintf_result = fprintf (stream, "\\t");
+          break;
+
+        case '\f':
+          fprintf_result = fprintf (stream, "\\f");
+          break;
+
+        case ' ':
+          fprintf_result = fprintf (stream, "\\ ");
+          break;
+
+        case '"':
+          fprintf_result = fprintf (stream, "\\\"");
+          break;
+
+        default:
+          if (c > 040 && c < 0177)
+            {
+              if (EOF == putc (c, stream))
+                return false;
+              fprintf_result = 1; /* otherwise it's used uninitialized. */
+            }
+          else
+            {
+              fprintf_result = fprintf (stream, "\\%03o", (unsigned int) c);
+            }
+        }
+      if (fprintf_result < 0)
+        return false;
+    }
+  return true;
+}
+
+static bool print_name (register const char *p, FILE *stream, int literal_control_chars)
+{
+  if (literal_control_chars)
+    return print_name_without_quoting (p, stream);
+  else
+    return print_name_with_quoting (p, stream);
+}