Adding upstream version 8.32.upstream/8.32upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 273 insertions, 0 deletions

diff --git a/src/sum.c b/src/sum.c
new file mode 100644
index 0000000..7528b25
--- /dev/null
+++ b/src/sum.c
@@ -0,0 +1,273 @@
+/* sum -- checksum and count the blocks in a file
+   Copyright (C) 1986-2020 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 <https://www.gnu.org/licenses/>.  */
+
+/* Like BSD sum or SysV sum -r, except like SysV sum if -s option is given. */
+
+/* Written by Kayvan Aghaiepour and David MacKenzie. */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <getopt.h>
+#include "system.h"
+#include "die.h"
+#include "error.h"
+#include "fadvise.h"
+#include "human.h"
+#include "safe-read.h"
+#include "xbinary-io.h"
+
+/* The official name of this program (e.g., no 'g' prefix).  */
+#define PROGRAM_NAME "sum"
+
+#define AUTHORS \
+  proper_name ("Kayvan Aghaiepour"), \
+  proper_name ("David MacKenzie")
+
+/* True if any of the files read were the standard input. */
+static bool have_read_stdin;
+
+static struct option const longopts[] =
+{
+  {"sysv", no_argument, NULL, 's'},
+  {GETOPT_HELP_OPTION_DECL},
+  {GETOPT_VERSION_OPTION_DECL},
+  {NULL, 0, NULL, 0}
+};
+
+void
+usage (int status)
+{
+  if (status != EXIT_SUCCESS)
+    emit_try_help ();
+  else
+    {
+      printf (_("\
+Usage: %s [OPTION]... [FILE]...\n\
+"),
+              program_name);
+      fputs (_("\
+Print checksum and block counts for each FILE.\n\
+"), stdout);
+
+      emit_stdin_note ();
+
+      fputs (_("\
+\n\
+  -r              use BSD sum algorithm, use 1K blocks\n\
+  -s, --sysv      use System V sum algorithm, use 512 bytes blocks\n\
+"), stdout);
+      fputs (HELP_OPTION_DESCRIPTION, stdout);
+      fputs (VERSION_OPTION_DESCRIPTION, stdout);
+      emit_ancillary_info (PROGRAM_NAME);
+    }
+  exit (status);
+}
+
+/* Calculate and print the rotated checksum and the size in 1K blocks
+   of file FILE, or of the standard input if FILE is "-".
+   If PRINT_NAME is >1, print FILE next to the checksum and size.
+   The checksum varies depending on sizeof (int).
+   Return true if successful.  */
+
+static bool
+bsd_sum_file (const char *file, int print_name)
+{
+  FILE *fp;
+  int checksum = 0;	/* The checksum mod 2^16. */
+  uintmax_t total_bytes = 0;	/* The number of bytes. */
+  int ch;		/* Each character read. */
+  char hbuf[LONGEST_HUMAN_READABLE + 1];
+  bool is_stdin = STREQ (file, "-");
+
+  if (is_stdin)
+    {
+      fp = stdin;
+      have_read_stdin = true;
+      xset_binary_mode (STDIN_FILENO, O_BINARY);
+    }
+  else
+    {
+      fp = fopen (file, (O_BINARY ? "rb" : "r"));
+      if (fp == NULL)
+        {
+          error (0, errno, "%s", quotef (file));
+          return false;
+        }
+    }
+
+  fadvise (fp, FADVISE_SEQUENTIAL);
+
+  while ((ch = getc (fp)) != EOF)
+    {
+      total_bytes++;
+      checksum = (checksum >> 1) + ((checksum & 1) << 15);
+      checksum += ch;
+      checksum &= 0xffff;	/* Keep it within bounds. */
+    }
+
+  if (ferror (fp))
+    {
+      error (0, errno, "%s", quotef (file));
+      if (!is_stdin)
+        fclose (fp);
+      return false;
+    }
+
+  if (!is_stdin && fclose (fp) != 0)
+    {
+      error (0, errno, "%s", quotef (file));
+      return false;
+    }
+
+  printf ("%05d %5s", checksum,
+          human_readable (total_bytes, hbuf, human_ceiling, 1, 1024));
+  if (print_name > 1)
+    printf (" %s", file);
+  putchar ('\n');
+
+  return true;
+}
+
+/* Calculate and print the checksum and the size in 512-byte blocks
+   of file FILE, or of the standard input if FILE is "-".
+   If PRINT_NAME is >0, print FILE next to the checksum and size.
+   Return true if successful.  */
+
+static bool
+sysv_sum_file (const char *file, int print_name)
+{
+  int fd;
+  unsigned char buf[8192];
+  uintmax_t total_bytes = 0;
+  char hbuf[LONGEST_HUMAN_READABLE + 1];
+  int r;
+  int checksum;
+
+  /* The sum of all the input bytes, modulo (UINT_MAX + 1).  */
+  unsigned int s = 0;
+
+  bool is_stdin = STREQ (file, "-");
+
+  if (is_stdin)
+    {
+      fd = STDIN_FILENO;
+      have_read_stdin = true;
+      xset_binary_mode (STDIN_FILENO, O_BINARY);
+    }
+  else
+    {
+      fd = open (file, O_RDONLY | O_BINARY);
+      if (fd == -1)
+        {
+          error (0, errno, "%s", quotef (file));
+          return false;
+        }
+    }
+
+  while (1)
+    {
+      size_t bytes_read = safe_read (fd, buf, sizeof buf);
+
+      if (bytes_read == 0)
+        break;
+
+      if (bytes_read == SAFE_READ_ERROR)
+        {
+          error (0, errno, "%s", quotef (file));
+          if (!is_stdin)
+            close (fd);
+          return false;
+        }
+
+      for (size_t i = 0; i < bytes_read; i++)
+        s += buf[i];
+      total_bytes += bytes_read;
+    }
+
+  if (!is_stdin && close (fd) != 0)
+    {
+      error (0, errno, "%s", quotef (file));
+      return false;
+    }
+
+  r = (s & 0xffff) + ((s & 0xffffffff) >> 16);
+  checksum = (r & 0xffff) + (r >> 16);
+
+  printf ("%d %s", checksum,
+          human_readable (total_bytes, hbuf, human_ceiling, 1, 512));
+  if (print_name)
+    printf (" %s", file);
+  putchar ('\n');
+
+  return true;
+}
+
+int
+main (int argc, char **argv)
+{
+  bool ok;
+  int optc;
+  int files_given;
+  bool (*sum_func) (const char *, int) = bsd_sum_file;
+
+  initialize_main (&argc, &argv);
+  set_program_name (argv[0]);
+  setlocale (LC_ALL, "");
+  bindtextdomain (PACKAGE, LOCALEDIR);
+  textdomain (PACKAGE);
+
+  atexit (close_stdout);
+
+  /* Line buffer stdout to ensure lines are written atomically and immediately
+     so that processes running in parallel do not intersperse their output.  */
+  setvbuf (stdout, NULL, _IOLBF, 0);
+
+  have_read_stdin = false;
+
+  while ((optc = getopt_long (argc, argv, "rs", longopts, NULL)) != -1)
+    {
+      switch (optc)
+        {
+        case 'r':		/* For SysV compatibility. */
+          sum_func = bsd_sum_file;
+          break;
+
+        case 's':
+          sum_func = sysv_sum_file;
+          break;
+
+        case_GETOPT_HELP_CHAR;
+
+        case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
+
+        default:
+          usage (EXIT_FAILURE);
+        }
+    }
+
+  files_given = argc - optind;
+  if (files_given <= 0)
+    ok = sum_func ("-", files_given);
+  else
+    for (ok = true; optind < argc; optind++)
+      ok &= sum_func (argv[optind], files_given);
+
+  if (have_read_stdin && fclose (stdin) == EOF)
+    die (EXIT_FAILURE, errno, "%s", quotef ("-"));
+  return ok ? EXIT_SUCCESS : EXIT_FAILURE;
+}