From be54882039632c791493d3657042f7ea9d6f4a20 Mon Sep 17 00:00:00 2001
From: Ondrej Dubaj <odubaj@redhat.com>
Date: Tue, 21 Sep 2021 11:42:02 +0200
Subject: [PATCH] * src/dstring.c (ds_init): Take a single argument.
(ds_free): New function. (ds_resize): Take a single argument. Use
x2nrealloc to expand the storage.
(ds_reset,ds_append,ds_concat,ds_endswith): New function. (ds_fgetstr):
Rewrite. In particular, this fixes integer overflow. (ds_resize): Take
additional argument: number of bytes to leave available after ds_idx. All
uses changed. * src/dstring.h (dynamic_string): Keep both the allocated
length (ds_size) and index of the next free byte in the string (ds_idx).
(ds_init,ds_resize): Change signature. (ds_len): New macro.
(ds_free,ds_reset,ds_append,ds_concat,ds_endswith): New protos. *
src/copyin.c: Use new ds_ functions. (read_name_from_file): Handle len == 0.
(read_name_from_file): Print error message and skip file if its name is not
nul-terminated. (long_format): Cast rdev numbers to unsigned long *
src/copyout.c: Likewise. * src/copypass.c: Likewise. * src/util.c: Likewise.
(tape_empty_output_buffer): Fix condition. * src/idcache.c
(getuser,getgroup): Use umaxtostr instead of sprintf. * src/userspec.c
(parse_user_spec): Likewise.
---
configure.ac | 4 +-
src/copyin.c | 228 ++++++++++++++++++-------------------------------
src/copyout.c | 77 +++++++++--------
src/copypass.c | 34 ++++----
src/cpiohdr.h | 9 +-
src/dstring.c | 89 +++++++++++++------
src/dstring.h | 30 +++----
src/extern.h | 22 +++--
src/idcache.c | 11 ++-
src/makepath.c | 2 +-
src/userspec.c | 9 +-
src/util.c | 53 +++++++++---
12 files changed, 294 insertions(+), 274 deletions(-)
diff --git a/configure.ac b/configure.ac
index c68bd44..49eaacd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -21,8 +21,8 @@ AC_INIT([GNU cpio], [2.12], [bug-cpio@gnu.org],,
AC_CONFIG_SRCDIR(src/cpio.h)
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_HEADERS([config.h])
-AC_PREREQ([2.63])
-AM_INIT_AUTOMAKE([1.11.1 gnits tar-ustar dist-bzip2 std-options silent-rules])
+AC_PREREQ([2.64])
+AM_INIT_AUTOMAKE([1.15 gnits tar-ustar dist-bzip2 std-options silent-rules])
# Enable silent rules by default:
AM_SILENT_RULES([yes])
diff --git a/src/copyin.c b/src/copyin.c
index 267ed4b..2f9da73 100644
--- a/src/copyin.c
+++ b/src/copyin.c
@@ -56,10 +56,10 @@ query_rename(struct cpio_file_stat* file_hdr, FILE *tty_in, FILE *tty_out,
static dynamic_string new_name; /* New file name for rename option. */
static int initialized_new_name = false;
if (!initialized_new_name)
- {
- ds_init (&new_name, 128);
- initialized_new_name = true;
- }
+ {
+ ds_init (&new_name);
+ initialized_new_name = true;
+ }
if (rename_flag)
{
@@ -76,28 +76,7 @@ query_rename(struct cpio_file_stat* file_hdr, FILE *tty_in, FILE *tty_out,
return -1;
}
else
- /* Debian hack: file_hrd.c_name is sometimes set to
- point to static memory by code in tar.c. This
- causes a segfault. This has been fixed and an
- additional check to ensure that the file name
- is not too long has been added. (Reported by
- Horst Knobloch.) This bug has been reported to
- "bug-gnu-utils@prep.ai.mit.edu". (99/1/6) -BEM */
- {
- if (archive_format != arf_tar && archive_format != arf_ustar)
- {
- free (file_hdr->c_name);
- file_hdr->c_name = xstrdup (new_name.ds_string);
- }
- else
- {
- if (is_tar_filename_too_long (new_name.ds_string))
- error (0, 0, _("%s: file name too long"),
- new_name.ds_string);
- else
- strcpy (file_hdr->c_name, new_name.ds_string);
- }
- }
+ cpio_set_c_name (file_hdr, new_name.ds_string);
return 0;
}
@@ -173,10 +152,8 @@ list_file (struct cpio_file_stat* file_hdr, int in_file_des)
}
else
{
- /* Debian hack: Modified to print a list of filenames
- terminiated by a null character when the -t and -0
- flags are used. This has been submitted as a
- suggestion to "bug-gnu-utils@prep.ai.mit.edu". -BEM */
+ /* Print out the name as it is. The name_end delimiter is normally
+ '\n', but can be reset to '\0' by the -0 option. */
printf ("%s%c", file_hdr->c_name, name_end);
}
@@ -201,7 +178,7 @@ list_file (struct cpio_file_stat* file_hdr, int in_file_des)
static int
try_existing_file (struct cpio_file_stat* file_hdr, int in_file_des,
- int *existing_dir)
+ bool *existing_dir)
{
struct stat file_stat;
@@ -344,8 +321,7 @@ create_defered_links_to_skipped (struct cpio_file_stat *file_hdr,
d_prev->next = d->next;
else
deferments = d->next;
- free (file_hdr->c_name);
- file_hdr->c_name = xstrdup(d->header.c_name);
+ cpio_set_c_name (file_hdr, d->header.c_name);
free_deferment (d);
copyin_regular_file(file_hdr, in_file_des);
return 0;
@@ -697,7 +673,7 @@ copyin_link (struct cpio_file_stat *file_hdr, int in_file_des)
static void
copyin_file (struct cpio_file_stat *file_hdr, int in_file_des)
{
- int existing_dir;
+ bool existing_dir = false;
if (!to_stdout_option
&& try_existing_file (file_hdr, in_file_des, &existing_dir) < 0)
@@ -748,7 +724,7 @@ static time_t current_time;
this file is a symbolic link to. */
void
-long_format (struct cpio_file_stat *file_hdr, char *link_name)
+long_format (struct cpio_file_stat *file_hdr, char const *link_name)
{
char mbuf[11];
char tbuf[40];
@@ -780,92 +756,42 @@ long_format (struct cpio_file_stat *file_hdr, char *link_name)
if ((file_hdr->c_mode & CP_IFMT) == CP_IFCHR
|| (file_hdr->c_mode & CP_IFMT) == CP_IFBLK)
- printf ("%3lu, %3lu ", file_hdr->c_rdev_maj,
- file_hdr->c_rdev_min);
+ printf ("%3lu, %3lu ",
+ (unsigned long) file_hdr->c_rdev_maj,
+ (unsigned long) file_hdr->c_rdev_min);
else
printf ("%8"PRIuMAX" ", (uintmax_t) file_hdr->c_filesize);
printf ("%s ", tbuf + 4);
- print_name_with_quoting (file_hdr->c_name);
+ printf ("%s", quotearg (file_hdr->c_name));
if (link_name)
{
printf (" -> ");
- print_name_with_quoting (link_name);
+ printf ("%s", quotearg (link_name));
}
putc ('\n', stdout);
}
-void
-print_name_with_quoting (register char *p)
-{
- register unsigned char c;
-
- while ( (c = *p++) )
- {
- 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);
- }
- }
-}
-
/* Read a pattern file (for the -E option). Put a list of
`num_patterns' elements in `save_patterns'. Any patterns that were
already in `save_patterns' (from the command line) are preserved. */
static void
-read_pattern_file ()
+read_pattern_file (void)
{
- int max_new_patterns;
- char **new_save_patterns;
- int new_num_patterns;
+ char **new_save_patterns = NULL;
+ size_t max_new_patterns;
+ size_t new_num_patterns;
int i;
- dynamic_string pattern_name;
+ dynamic_string pattern_name = DYNAMIC_STRING_INITIALIZER;
FILE *pattern_fp;
if (num_patterns < 0)
num_patterns = 0;
- max_new_patterns = 1 + num_patterns;
- new_save_patterns = (char **) xmalloc (max_new_patterns * sizeof (char *));
new_num_patterns = num_patterns;
- ds_init (&pattern_name, 128);
+ max_new_patterns = num_patterns;
+ new_save_patterns = xcalloc (max_new_patterns, sizeof (new_save_patterns[0]));
pattern_fp = fopen (pattern_file_name, "r");
if (pattern_fp == NULL)
@@ -874,16 +800,16 @@ read_pattern_file ()
{
while (ds_fgetstr (pattern_fp, &pattern_name, '\n') != NULL)
{
- if (new_num_patterns >= max_new_patterns)
- {
- max_new_patterns += 1;
- new_save_patterns = (char **)
- xrealloc ((char *) new_save_patterns,
- max_new_patterns * sizeof (char *));
- }
+ if (new_num_patterns == max_new_patterns)
+ new_save_patterns = x2nrealloc (new_save_patterns,
+ &max_new_patterns,
+ sizeof (new_save_patterns[0]));
new_save_patterns[new_num_patterns] = xstrdup (pattern_name.ds_string);
++new_num_patterns;
}
+
+ ds_free (&pattern_name);
+
if (ferror (pattern_fp) || fclose (pattern_fp) == EOF)
close_error (pattern_file_name);
}
@@ -1066,6 +992,27 @@ read_in_header (struct cpio_file_stat *file_hdr, int in_des)
}
}
+static void
+read_name_from_file (struct cpio_file_stat *file_hdr, int fd, uintmax_t len)
+{
+ if (len == 0)
+ {
+ error (0, 0, _("malformed header: file name of zero length"));
+ }
+ else
+ {
+ cpio_realloc_c_name (file_hdr, len);
+ tape_buffered_read (file_hdr->c_name, fd, len);
+ if (file_hdr->c_name[len-1] != 0)
+ {
+ error (0, 0, _("malformed header: file name is not nul-terminated"));
+ /* Skip this file */
+ len = 0;
+ }
+ }
+ file_hdr->c_namesize = len;
+}
+
/* Fill in FILE_HDR by reading an old-format ASCII format cpio header from
file descriptor IN_DES, except for the magic number, which is
already filled in. */
@@ -1092,14 +1039,9 @@ read_in_old_ascii (struct cpio_file_stat *file_hdr, int in_des)
file_hdr->c_rdev_min = minor (dev);
file_hdr->c_mtime = FROM_OCTAL (ascii_header.c_mtime);
- file_hdr->c_namesize = FROM_OCTAL (ascii_header.c_namesize);
file_hdr->c_filesize = FROM_OCTAL (ascii_header.c_filesize);
- /* Read file name from input. */
- if (file_hdr->c_name != NULL)
- free (file_hdr->c_name);
- file_hdr->c_name = (char *) xmalloc (file_hdr->c_namesize + 1);
- tape_buffered_read (file_hdr->c_name, in_des, (long) file_hdr->c_namesize);
+ read_name_from_file (file_hdr, in_des, FROM_OCTAL (ascii_header.c_namesize));
/* HP/UX cpio creates archives that look just like ordinary archives,
but for devices it sets major = 0, minor = 1, and puts the
@@ -1154,14 +1096,9 @@ read_in_new_ascii (struct cpio_file_stat *file_hdr, int in_des)
file_hdr->c_dev_min = FROM_HEX (ascii_header.c_dev_min);
file_hdr->c_rdev_maj = FROM_HEX (ascii_header.c_rdev_maj);
file_hdr->c_rdev_min = FROM_HEX (ascii_header.c_rdev_min);
- file_hdr->c_namesize = FROM_HEX (ascii_header.c_namesize);
file_hdr->c_chksum = FROM_HEX (ascii_header.c_chksum);
- /* Read file name from input. */
- if (file_hdr->c_name != NULL)
- free (file_hdr->c_name);
- file_hdr->c_name = (char *) xmalloc (file_hdr->c_namesize);
- tape_buffered_read (file_hdr->c_name, in_des, (long) file_hdr->c_namesize);
+ read_name_from_file (file_hdr, in_des, FROM_HEX (ascii_header.c_namesize));
/* In SVR4 ASCII format, the amount of space allocated for the header
is rounded up to the next long-word, so we might need to drop
@@ -1209,16 +1146,10 @@ read_in_binary (struct cpio_file_stat *file_hdr,
file_hdr->c_rdev_min = minor ((unsigned short)short_hdr->c_rdev);
file_hdr->c_mtime = (unsigned long) short_hdr->c_mtimes[0] << 16
| short_hdr->c_mtimes[1];
-
- file_hdr->c_namesize = short_hdr->c_namesize;
file_hdr->c_filesize = (unsigned long) short_hdr->c_filesizes[0] << 16
| short_hdr->c_filesizes[1];
- /* Read file name from input. */
- if (file_hdr->c_name != NULL)
- free (file_hdr->c_name);
- file_hdr->c_name = (char *) xmalloc (file_hdr->c_namesize);
- tape_buffered_read (file_hdr->c_name, in_des, (long) file_hdr->c_namesize);
+ read_name_from_file (file_hdr, in_des, short_hdr->c_namesize);
/* In binary mode, the amount of space allocated in the header for
the filename is `c_namesize' rounded up to the next short-word,
@@ -1278,14 +1209,14 @@ swab_array (char *ptr, int count)
in the file system. */
void
-process_copy_in ()
+process_copy_in (void)
{
- char done = false; /* True if trailer reached. */
FILE *tty_in = NULL; /* Interactive file for rename option. */
FILE *tty_out = NULL; /* Interactive file for rename option. */
FILE *rename_in = NULL; /* Batch file for rename option. */
struct stat file_stat; /* Output file stat record. */
- struct cpio_file_stat file_hdr; /* Output header information. */
+ struct cpio_file_stat file_hdr = CPIO_FILE_STAT_INITIALIZER;
+ /* Output header information. */
int in_file_des; /* Input file descriptor. */
char skip_file; /* Flag for use with patterns. */
int i; /* Loop index variable. */
@@ -1298,8 +1229,7 @@ process_copy_in ()
{
read_pattern_file ();
}
- file_hdr.c_name = NULL;
-
+ file_hdr.c_namesize = 0;
if (rename_batch_file)
{
rename_in = fopen (rename_batch_file, "r");
@@ -1352,7 +1282,7 @@ process_copy_in ()
change_dir ();
/* While there is more input in the collection, process the input. */
- while (!done)
+ while (1)
{
swapping_halfwords = swapping_bytes = false;
@@ -1380,30 +1310,32 @@ process_copy_in ()
}
#endif
- /* Is this the header for the TRAILER file? */
- if (strcmp (CPIO_TRAILER_NAME, file_hdr.c_name) == 0)
+ if (file_hdr.c_namesize == 0)
+ skip_file = true;
+ else
{
- done = true;
- break;
- }
+ /* Is this the header for the TRAILER file? */
+ if (strcmp (CPIO_TRAILER_NAME, file_hdr.c_name) == 0)
+ break;
- cpio_safer_name_suffix (file_hdr.c_name, false, !no_abs_paths_flag,
- false);
+ cpio_safer_name_suffix (file_hdr.c_name, false, !no_abs_paths_flag,
+ false);
- /* Does the file name match one of the given patterns? */
- if (num_patterns <= 0)
- skip_file = false;
- else
- {
- skip_file = copy_matching_files;
- for (i = 0; i < num_patterns
- && skip_file == copy_matching_files; i++)
+ /* Does the file name match one of the given patterns? */
+ if (num_patterns <= 0)
+ skip_file = false;
+ else
{
- if (fnmatch (save_patterns[i], file_hdr.c_name, 0) == 0)
- skip_file = !copy_matching_files;
+ skip_file = copy_matching_files;
+ for (i = 0; i < num_patterns
+ && skip_file == copy_matching_files; i++)
+ {
+ if (fnmatch (save_patterns[i], file_hdr.c_name, 0) == 0)
+ skip_file = !copy_matching_files;
+ }
}
}
-
+
if (skip_file)
{
/* If we're skipping a file with links, there might be other
@@ -1494,6 +1426,8 @@ process_copy_in ()
fputc ('\n', stderr);
apply_delayed_set_stat ();
+
+ cpio_file_stat_free (&file_hdr);
if (append_flag)
return;
diff --git a/src/copyout.c b/src/copyout.c
index 56416ba..a576f27 100644
--- a/src/copyout.c
+++ b/src/copyout.c
@@ -269,26 +269,32 @@ writeout_final_defers (int out_des)
so it should be moved to paxutils too.
Allowed values for logbase are: 1 (binary), 2, 3 (octal), 4 (hex) */
int
-to_ascii (char *where, uintmax_t v, size_t digits, unsigned logbase)
+to_ascii (char *where, uintmax_t v, size_t digits, unsigned logbase, bool nul)
{
static char codetab[] = "0123456789ABCDEF";
- int i = digits;
- do
+ if (nul)
+ where[--digits] = 0;
+ while (digits > 0)
{
- where[--i] = codetab[(v & ((1 << logbase) - 1))];
+ where[--digits] = codetab[(v & ((1 << logbase) - 1))];
v >>= logbase;
}
- while (i);
return v != 0;
}
-static void
-field_width_error (const char *filename, const char *fieldname)
+void
+field_width_error (const char *filename, const char *fieldname,
+ uintmax_t value, size_t width, bool nul)
{
- error (1, 0, _("%s: field width not sufficient for storing %s"),
- filename, fieldname);
+ char valbuf[UINTMAX_STRSIZE_BOUND + 1];
+ char maxbuf[UINTMAX_STRSIZE_BOUND + 1];
+ error (1, 0, _("%s: value %s %s out of allowed range 0..%s"),
+ filename, fieldname,
+ STRINGIFY_BIGINT (value, valbuf),
+ STRINGIFY_BIGINT (MAX_VAL_WITH_DIGITS (width - nul, LG_8),
+ maxbuf));
}
static void
@@ -303,7 +309,7 @@ to_ascii_or_warn (char *where, uintmax_t n, size_t digits,
unsigned logbase,
const char *filename, const char *fieldname)
{
- if (to_ascii (where, n, digits, logbase))
+ if (to_ascii (where, n, digits, logbase, false))
field_width_warning (filename, fieldname);
}
@@ -312,9 +318,9 @@ to_ascii_or_error (char *where, uintmax_t n, size_t digits,
unsigned logbase,
const char *filename, const char *fieldname)
{
- if (to_ascii (where, n, digits, logbase))
+ if (to_ascii (where, n, digits, logbase, false))
{
- field_width_error (filename, fieldname);
+ field_width_error (filename, fieldname, n, digits, false);
return 1;
}
return 0;
@@ -371,7 +377,7 @@ write_out_new_ascii_header (const char *magic_string,
_("name size")))
return 1;
p += 8;
- to_ascii (p, file_hdr->c_chksum & 0xffffffff, 8, LG_16);
+ to_ascii (p, file_hdr->c_chksum & 0xffffffff, 8, LG_16, false);
tape_buffered_write (ascii_header, out_des, sizeof ascii_header);
@@ -388,7 +394,7 @@ write_out_old_ascii_header (dev_t dev, dev_t rdev,
char ascii_header[76];
char *p = ascii_header;
- to_ascii (p, file_hdr->c_magic, 6, LG_8);
+ to_ascii (p, file_hdr->c_magic, 6, LG_8, false);
p += 6;
to_ascii_or_warn (p, dev, 6, LG_8, file_hdr->c_name, _("device number"));
p += 6;
@@ -492,7 +498,10 @@ write_out_binary_header (dev_t rdev,
short_hdr.c_namesize = file_hdr->c_namesize & 0xFFFF;
if (short_hdr.c_namesize != file_hdr->c_namesize)
{
- field_width_error (file_hdr->c_name, _("name size"));
+ char maxbuf[UINTMAX_STRSIZE_BOUND + 1];
+ error (1, 0, _("%s: value %s %s out of allowed range 0..%u"),
+ file_hdr->c_name, _("name size"),
+ STRINGIFY_BIGINT (file_hdr->c_namesize, maxbuf), 0xFFFFu);
return 1;
}
@@ -502,7 +511,10 @@ write_out_binary_header (dev_t rdev,
if (((off_t)short_hdr.c_filesizes[0] << 16) + short_hdr.c_filesizes[1]
!= file_hdr->c_filesize)
{
- field_width_error (file_hdr->c_name, _("file size"));
+ char maxbuf[UINTMAX_STRSIZE_BOUND + 1];
+ error (1, 0, _("%s: value %s %s out of allowed range 0..%lu"),
+ file_hdr->c_name, _("file size"),
+ STRINGIFY_BIGINT (file_hdr->c_namesize, maxbuf), 0xFFFFFFFFlu);
return 1;
}
@@ -582,17 +594,18 @@ assign_string (char **pvar, char *value)
The format of the header depends on the compatibility (-c) flag. */
void
-process_copy_out ()
+process_copy_out (void)
{
- dynamic_string input_name; /* Name of file read from stdin. */
+ dynamic_string input_name = DYNAMIC_STRING_INITIALIZER;
+ /* Name of file read from stdin. */
struct stat file_stat; /* Stat record for file. */
- struct cpio_file_stat file_hdr; /* Output header information. */
+ struct cpio_file_stat file_hdr = CPIO_FILE_STAT_INITIALIZER;
+ /* Output header information. */
int in_file_des; /* Source file descriptor. */
int out_file_des; /* Output file descriptor. */
char *orig_file_name = NULL;
/* Initialize the copy out. */
- ds_init (&input_name, 128);
file_hdr.c_magic = 070707;
/* Check whether the output file might be a tape. */
@@ -644,14 +657,9 @@ process_copy_out ()
{
if (file_hdr.c_mode & CP_IFDIR)
{
- int len = strlen (input_name.ds_string);
/* Make sure the name ends with a slash */
- if (input_name.ds_string[len-1] != '/')
- {
- ds_resize (&input_name, len + 2);
- input_name.ds_string[len] = '/';
- input_name.ds_string[len+1] = 0;
- }
+ if (!ds_endswith (&input_name, '/'))
+ ds_append (&input_name, '/');
}
}
@@ -659,8 +667,7 @@ process_copy_out ()
cpio_safer_name_suffix (input_name.ds_string, false,
!no_abs_paths_flag, true);
#ifndef HPUX_CDF
- file_hdr.c_name = input_name.ds_string;
- file_hdr.c_namesize = strlen (input_name.ds_string) + 1;
+ cpio_set_c_name (&file_hdr, input_name.ds_string);
#else
if ( (archive_format != arf_tar) && (archive_format != arf_ustar) )
{
@@ -669,16 +676,15 @@ process_copy_out ()
properly recreate the directory as hidden (in case the
files of a directory go into the archive before the
directory itself (e.g from "find ... -depth ... | cpio")). */
- file_hdr.c_name = add_cdf_double_slashes (input_name.ds_string);
- file_hdr.c_namesize = strlen (file_hdr.c_name) + 1;
+ cpio_set_c_name (&file_hdr,
+ add_cdf_double_slashes (input_name.ds_string));
}
else
{
/* We don't mark CDF's in tar files. We assume the "hidden"
directory will always go into the archive before any of
its files. */
- file_hdr.c_name = input_name.ds_string;
- file_hdr.c_namesize = strlen (input_name.ds_string) + 1;
+ cpio_set_c_name (&file_hdr, input_name.ds_string);
}
#endif
@@ -865,8 +871,7 @@ process_copy_out ()
file_hdr.c_chksum = 0;
file_hdr.c_filesize = 0;
- file_hdr.c_namesize = 11;
- file_hdr.c_name = CPIO_TRAILER_NAME;
+ cpio_set_c_name (&file_hdr, CPIO_TRAILER_NAME);
if (archive_format != arf_tar && archive_format != arf_ustar)
write_out_header (&file_hdr, out_file_des);
else
@@ -884,6 +889,8 @@ process_copy_out ()
ngettext ("%lu block\n", "%lu blocks\n",
(unsigned long) blocks), (unsigned long) blocks);
}
+ cpio_file_stat_free (&file_hdr);
+ ds_free (&input_name);
}
diff --git a/src/tar.c b/src/tar.c
index 1b1156e..0a34845 100644
--- a/src/tar.c
+++ b/src/tar.c
@@ -282,7 +282,7 @@ read_in_tar_header (struct cpio_file_stat *file_hdr, int in_des)
if (null_block ((long *) &tar_rec, TARRECORDSIZE))
#endif
{
- file_hdr->c_name = CPIO_TRAILER_NAME;
+ cpio_set_c_name (file_hdr, CPIO_TRAILER_NAME);
return;
}
#if 0
@@ -316,9 +316,11 @@ read_in_tar_header (struct cpio_file_stat *file_hdr, int in_des)
}
if (archive_format != arf_ustar)
- file_hdr->c_name = stash_tar_filename (NULL, tar_hdr->name);
+ cpio_set_c_name (file_hdr, stash_tar_filename (NULL, tar_hdr->name));
else
- file_hdr->c_name = stash_tar_filename (tar_hdr->prefix, tar_hdr->name);
+ cpio_set_c_name (file_hdr, stash_tar_filename (tar_hdr->prefix,
+ tar_hdr->name));
+
file_hdr->c_nlink = 1;
file_hdr->c_mode = FROM_OCTAL (tar_hdr->mode);
file_hdr->c_mode = file_hdr->c_mode & 07777;
@@ -398,7 +400,7 @@ read_in_tar_header (struct cpio_file_stat *file_hdr, int in_des)
case AREGTYPE:
/* Old tar format; if the last char in filename is '/' then it is
a directory, otherwise it's a regular file. */
- if (file_hdr->c_name[strlen (file_hdr->c_name) - 1] == '/')
+ if (file_hdr->c_name[file_hdr->c_namesize - 1] == '/')
file_hdr->c_mode |= CP_IFDIR;
else
file_hdr->c_mode |= CP_IFREG;
diff --git a/src/copypass.c b/src/copypass.c
index b4e7169..8378a9b 100644
--- a/src/copypass.c
+++ b/src/copypass.c
@@ -48,10 +48,12 @@ set_copypass_perms (int fd, const char *name, struct stat *st)
If `link_flag', link instead of copying. */
void
-process_copy_pass ()
+process_copy_pass (void)
{
- dynamic_string input_name; /* Name of file from stdin. */
- dynamic_string output_name; /* Name of new file. */
+ dynamic_string input_name = DYNAMIC_STRING_INITIALIZER;
+ /* Name of file from stdin. */
+ dynamic_string output_name = DYNAMIC_STRING_INITIALIZER;
+ /* Name of new file. */
size_t dirname_len; /* Length of `directory_name'. */
int res; /* Result of functions. */
char *slash; /* For moving past slashes in input name. */
@@ -69,25 +71,19 @@ process_copy_pass ()
created files */
/* Initialize the copy pass. */
- ds_init (&input_name, 128);
dirname_len = strlen (directory_name);
if (change_directory_option && !ISSLASH (directory_name[0]))
{
char *pwd = xgetcwd ();
- dirname_len += strlen (pwd) + 1;
- ds_init (&output_name, dirname_len + 2);
- strcpy (output_name.ds_string, pwd);
- strcat (output_name.ds_string, "/");
- strcat (output_name.ds_string, directory_name);
+ ds_concat (&output_name, pwd);
+ ds_append (&output_name, '/');
}
- else
- {
- ds_init (&output_name, dirname_len + 2);
- strcpy (output_name.ds_string, directory_name);
- }
- output_name.ds_string[dirname_len] = '/';
+
+ ds_concat (&output_name, directory_name);
+ ds_append (&output_name, '/');
+ dirname_len = ds_len (&output_name);
output_is_seekable = true;
change_dir ();
@@ -127,8 +123,8 @@ process_copy_pass ()
keep track of which directories in a path are "hidden". */
slash = add_cdf_double_slashes (slash);
#endif
- ds_resize (&output_name, dirname_len + strlen (slash) + 2);
- strcpy (output_name.ds_string + dirname_len + 1, slash);
+ ds_reset (&output_name, dirname_len);
+ ds_concat (&output_name, slash);
existing_dir = false;
if (lstat (output_name.ds_string, &out_file_stat) == 0)
@@ -346,6 +342,8 @@ process_copy_pass ()
(unsigned long) blocks),
(unsigned long) blocks);
}
+ ds_free (&input_name);
+ ds_free (&output_name);
}
/* Try and create a hard link from FILE_NAME to another file
@@ -385,7 +383,7 @@ link_to_maj_min_ino (char *file_name, int st_dev_maj, int st_dev_min,
is created, -1 otherwise. */
int
-link_to_name (char *link_name, char *link_target)
+link_to_name (char const *link_name, char const *link_target)
{
int res = link (link_target, link_name);
if (res < 0 && create_dir_flag)
diff --git a/src/cpiohdr.h b/src/cpiohdr.h
index b29e6fb..aa4a8c4 100644
--- a/src/cpiohdr.h
+++ b/src/cpiohdr.h
@@ -126,8 +126,15 @@ struct cpio_file_stat /* Internal representation of a CPIO header */
size_t c_namesize;
uint32_t c_chksum;
char *c_name;
- char *c_tar_linkname;
+ size_t c_name_buflen;
+ char const *c_tar_linkname;
};
+#define CPIO_FILE_STAT_INITIALIZER \
+ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, 0, NULL }
+void cpio_file_stat_init (struct cpio_file_stat *file_hdr);
+void cpio_file_stat_free (struct cpio_file_stat *file_hdr);
+void cpio_set_c_name(struct cpio_file_stat *file_hdr, char *name);
+void cpio_realloc_c_name (struct cpio_file_stat *file_hdr, size_t len);
#endif /* cpiohdr.h */
diff --git a/src/dstring.c b/src/dstring.c
index 2e6b97b..b70d72e 100644
--- a/src/dstring.c
+++ b/src/dstring.c
@@ -22,37 +22,52 @@
#endif
#include <stdio.h>
+#include <stdlib.h>
#if defined(HAVE_STRING_H) || defined(STDC_HEADERS)
#include <string.h>
#else
#include <strings.h>
#endif
#include "dstring.h"
-
-char *xmalloc (unsigned n);
-char *xrealloc (char *p, unsigned n);
+#include <xalloc.h>
/* Initialiaze dynamic string STRING with space for SIZE characters. */
void
-ds_init (dynamic_string *string, int size)
+ds_init (dynamic_string *string)
+{
+ memset (string, 0, sizeof *string);
+}
+
+/* Free the dynamic string storage. */
+
+void
+ds_free (dynamic_string *string)
{
- string->ds_length = size;
- string->ds_string = (char *) xmalloc (size);
+ free (string->ds_string);
}
-/* Expand dynamic string STRING, if necessary, to hold SIZE characters. */
+/* Expand dynamic string STRING, if necessary. */
void
-ds_resize (dynamic_string *string, int size)
+ds_resize (dynamic_string *string, size_t len)
{
- if (size > string->ds_length)
+ while (len + string->ds_idx >= string->ds_size)
{
- string->ds_length = size;
- string->ds_string = (char *) xrealloc ((char *) string->ds_string, size);
+ string->ds_string = x2nrealloc (string->ds_string, &string->ds_size,
+ 1);
}
}
+/* Reset the index of the dynamic string S to LEN. */
+
+void
+ds_reset (dynamic_string *s, size_t len)
+{
+ ds_resize (s, len);
+ s->ds_idx = len;
+}
+
/* Dynamic string S gets a string terminated by the EOS character
(which is removed) from file F. S will increase
in size during the function if the string from F is longer than
@@ -63,34 +78,49 @@ ds_resize (dynamic_string *string, int size)
char *
ds_fgetstr (FILE *f, dynamic_string *s, char eos)
{
- int insize; /* Amount needed for line. */
- int strsize; /* Amount allocated for S. */
int next_ch;
/* Initialize. */
- insize = 0;
- strsize = s->ds_length;
+ s->ds_idx = 0;
/* Read the input string. */
- next_ch = getc (f);
- while (next_ch != eos && next_ch != EOF)
+ while ((next_ch = getc (f)) != eos && next_ch != EOF)
{
- if (insize >= strsize - 1)
- {
- ds_resize (s, strsize * 2 + 2);
- strsize = s->ds_length;
- }
- s->ds_string[insize++] = next_ch;
- next_ch = getc (f);
+ ds_resize (s, 0);
+ s->ds_string[s->ds_idx++] = next_ch;
}
- s->ds_string[insize++] = '\0';
+ ds_resize (s, 0);
+ s->ds_string[s->ds_idx] = '\0';
- if (insize == 1 && next_ch == EOF)
+ if (s->ds_idx == 0 && next_ch == EOF)
return NULL;
else
return s->ds_string;
}
+void
+ds_append (dynamic_string *s, int c)
+{
+ ds_resize (s, 0);
+ s->ds_string[s->ds_idx] = c;
+ if (c)
+ {
+ s->ds_idx++;
+ ds_resize (s, 0);
+ s->ds_string[s->ds_idx] = 0;
+ }
+}
+
+void
+ds_concat (dynamic_string *s, char const *str)
+{
+ size_t len = strlen (str);
+ ds_resize (s, len);
+ memcpy (s->ds_string + s->ds_idx, str, len);
+ s->ds_idx += len;
+ s->ds_string[s->ds_idx] = 0;
+}
+
char *
ds_fgets (FILE *f, dynamic_string *s)
{
@@ -102,3 +132,10 @@ ds_fgetname (FILE *f, dynamic_string *s)
{
return ds_fgetstr (f, s, '\0');
}
+
+/* Return true if the dynamic string S ends with character C. */
+int
+ds_endswith (dynamic_string *s, int c)
+{
+ return (s->ds_idx > 0 && s->ds_string[s->ds_idx - 1] == c);
+}
diff --git a/src/dstring.h b/src/dstring.h
index 5b49def..a2b6183 100644
--- a/src/dstring.h
+++ b/src/dstring.h
@@ -17,10 +17,6 @@
Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301 USA. */
-#ifndef NULL
-#define NULL 0
-#endif
-
/* A dynamic string consists of record that records the size of an
allocated string and the pointer to that string. The actual string
is a normal zero byte terminated string that can be used with the
@@ -30,22 +26,24 @@
typedef struct
{
- int ds_length; /* Actual amount of storage allocated. */
- char *ds_string; /* String. */
+ size_t ds_size; /* Actual amount of storage allocated. */
+ size_t ds_idx; /* Index of the next free byte in the string. */
+ char *ds_string; /* String storage. */
} dynamic_string;
+#define DYNAMIC_STRING_INITIALIZER { 0, 0, NULL }
-/* Macros that look similar to the original string functions.
- WARNING: These macros work only on pointers to dynamic string records.
- If used with a real record, an "&" must be used to get the pointer. */
-#define ds_strlen(s) strlen ((s)->ds_string)
-#define ds_strcmp(s1, s2) strcmp ((s1)->ds_string, (s2)->ds_string)
-#define ds_strncmp(s1, s2, n) strncmp ((s1)->ds_string, (s2)->ds_string, n)
-#define ds_index(s, c) index ((s)->ds_string, c)
-#define ds_rindex(s, c) rindex ((s)->ds_string, c)
+void ds_init (dynamic_string *string);
+void ds_free (dynamic_string *string);
+void ds_reset (dynamic_string *s, size_t len);
-void ds_init (dynamic_string *string, int size);
-void ds_resize (dynamic_string *string, int size);
+/* All functions below guarantee that s->ds_string[s->ds_idx] == '\0' */
char *ds_fgetname (FILE *f, dynamic_string *s);
char *ds_fgets (FILE *f, dynamic_string *s);
char *ds_fgetstr (FILE *f, dynamic_string *s, char eos);
+void ds_append (dynamic_string *s, int c);
+void ds_concat (dynamic_string *s, char const *str);
+
+#define ds_len(s) ((s)->ds_idx)
+
+int ds_endswith (dynamic_string *s, int c);
diff --git a/src/extern.h b/src/extern.h
index 47b477a..6330e04 100644
--- a/src/extern.h
+++ b/src/extern.h
@@ -111,18 +111,21 @@ void read_in_binary (struct cpio_file_stat *file_hdr,
struct old_cpio_header *short_hdr, int in_des);
void swab_array (char *arg, int count);
void process_copy_in (void);
-void long_format (struct cpio_file_stat *file_hdr, char *link_name);
-void print_name_with_quoting (char *p);
+void long_format (struct cpio_file_stat *file_hdr, char const *link_name);
/* copyout.c */
int write_out_header (struct cpio_file_stat *file_hdr, int out_des);
void process_copy_out (void);
+int to_ascii (char *where, uintmax_t v, size_t digits, unsigned logbase,
+ bool nul);
+void field_width_error (const char *filename, const char *fieldname,
+ uintmax_t value, size_t width, bool nul);
/* copypass.c */
void process_copy_pass (void);
int link_to_maj_min_ino (char *file_name, int st_dev_maj,
int st_dev_min, ino_t st_ino);
-int link_to_name (char *link_name, char *link_target);
+int link_to_name (char const *link_name, char const *link_target);
/* dirname.c */
char *dirname (char *path);
@@ -141,7 +144,7 @@ void process_args (int argc, char *argv[]);
void initialize_buffers (void);
/* makepath.c */
-int make_path (char *argpath, uid_t owner, gid_t group,
+int make_path (char const *argpath, uid_t owner, gid_t group,
const char *verbose_fmt_string);
/* tar.c */
@@ -169,7 +172,7 @@ void copy_files_disk_to_tape (int in_des, int out_des, off_t num_bytes, char *fi
void copy_files_disk_to_disk (int in_des, int out_des, off_t num_bytes, char *filename);
void warn_if_file_changed (char *file_name, off_t old_file_size,
time_t old_file_mtime);
-void create_all_directories (char *name);
+void create_all_directories (char const *name);
void prepare_append (int out_file_des);
char *find_inode_file (ino_t node_num,
unsigned long major_num, unsigned long minor_num);
@@ -204,10 +207,17 @@ void cpio_safer_name_suffix (char *name, bool link_target,
int cpio_create_dir (struct cpio_file_stat *file_hdr, int existing_dir);
void change_dir (void);
-/* FIXME: These two defines should be defined in paxutils */
+/* FIXME: The following three should be defined in paxutils */
#define LG_8 3
#define LG_16 4
+/* The maximum uintmax_t value that can be represented with DIGITS digits,
+ assuming that each digit is BITS_PER_DIGIT wide. */
+#define MAX_VAL_WITH_DIGITS(digits, bits_per_digit) \
+ ((digits) * (bits_per_digit) < sizeof (uintmax_t) * CHAR_BIT \
+ ? ((uintmax_t) 1 << ((digits) * (bits_per_digit))) - 1 \
+ : (uintmax_t) -1)
+
uintmax_t from_ascii (char const *where, size_t digs, unsigned logbase);
#define FROM_OCTAL(f) from_ascii (f, sizeof f, LG_8)
diff --git a/src/idcache.c b/src/idcache.c
index c89e7f1..e82414e 100644
--- a/src/idcache.c
+++ b/src/idcache.c
@@ -34,6 +34,7 @@
#endif
#include <unistd.h>
+#include <inttostr.h>
struct userid
{
@@ -59,7 +60,6 @@ getuser (uid_t uid)
{
register struct userid *tail;
struct passwd *pwent;
- char usernum_string[20];
for (tail = user_alist; tail; tail = tail->next)
if (tail->id.u == uid)
@@ -70,8 +70,8 @@ getuser (uid_t uid)
tail->id.u = uid;
if (pwent == 0)
{
- sprintf (usernum_string, "%u", (unsigned) uid);
- tail->name = xstrdup (usernum_string);
+ char nbuf[UINTMAX_STRSIZE_BOUND];
+ tail->name = xstrdup (umaxtostr (uid, nbuf));
}
else
tail->name = xstrdup (pwent->pw_name);
@@ -134,7 +134,6 @@ getgroup (gid_t gid)
{
register struct userid *tail;
struct group *grent;
- char groupnum_string[20];
for (tail = group_alist; tail; tail = tail->next)
if (tail->id.g == gid)
@@ -145,8 +144,8 @@ getgroup (gid_t gid)
tail->id.g = gid;
if (grent == 0)
{
- sprintf (groupnum_string, "%u", (unsigned int) gid);
- tail->name = xstrdup (groupnum_string);
+ char nbuf[UINTMAX_STRSIZE_BOUND];
+ tail->name = xstrdup (umaxtostr (gid, nbuf));
}
else
tail->name = xstrdup (grent->gr_name);
diff --git a/src/makepath.c b/src/makepath.c
index 18d5b69..bad2537 100644
--- a/src/makepath.c
+++ b/src/makepath.c
@@ -49,7 +49,7 @@
ownership and permissions when done, otherwise 1. */
int
-make_path (char *argpath,
+make_path (char const *argpath,
uid_t owner,
gid_t group,
const char *verbose_fmt_string)
diff --git a/src/userspec.c b/src/userspec.c
index 14d608c..7b8bf2f 100644
--- a/src/userspec.c
+++ b/src/userspec.c
@@ -24,6 +24,7 @@
#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
+#include <inttostr.h>
#ifndef HAVE_ENDPWENT
# define endpwent()
@@ -141,12 +142,8 @@ parse_user_spec (const char *spec_arg, uid_t *uid, gid_t *gid,
grp = getgrgid (pwd->pw_gid);
if (grp == NULL)
{
- /* This is enough room to hold the unsigned decimal
- representation of any 32-bit quantity and the trailing
- zero byte. */
- char uint_buf[21];
- sprintf (uint_buf, "%u", (unsigned) (pwd->pw_gid));
- V_STRDUP (groupname, uint_buf);
+ char nbuf[UINTMAX_STRSIZE_BOUND];
+ V_STRDUP (groupname, umaxtostr (pwd->pw_gid, nbuf));
}
else
{
diff --git a/src/util.c b/src/util.c
index 11f9c30..097304f 100644
--- a/src/util.c
+++ b/src/util.c
@@ -79,8 +79,7 @@ tape_empty_output_buffer (int out_des)
if (output_is_special
&& (bytes_written >= 0
- || (bytes_written < 0
- && (errno == ENOSPC || errno == EIO || errno == ENXIO))))
+ || (errno == ENOSPC || errno == EIO || errno == ENXIO)))
{
get_next_reel (out_des);
if (bytes_written > 0)
@@ -596,7 +595,7 @@ warn_if_file_changed (char *file_name, off_t old_file_size,
Do not destroy any nondirectories while creating directories. */
void
-create_all_directories (char *name)
+create_all_directories (char const *name)
{
char *dir;
int mode;
@@ -718,7 +717,6 @@ find_inode_val (ino_t node_num, unsigned long major_num,
unsigned long minor_num)
{
struct inode_val sample;
- struct inode_val *ival;
if (!hash_table)
return NULL;
@@ -768,7 +766,7 @@ add_inode (ino_t node_num, char *file_name, unsigned long major_num,
return e;
}
-static ino_t
+static void
get_inode_and_dev (struct cpio_file_stat *hdr, struct stat *st)
{
if (renumber_inodes_option)
@@ -859,11 +857,9 @@ get_next_reel (int tape_des)
FILE *tty_out; /* File for interacting with user. */
int old_tape_des;
char *next_archive_name;
- dynamic_string new_name;
+ dynamic_string new_name = DYNAMIC_STRING_INITIALIZER;
char *str_res;
- ds_init (&new_name, 128);
-
/* Open files for interactive communication. */
tty_in = fopen (TTY_NAME, "r");
if (tty_in == NULL)
@@ -938,7 +934,7 @@ get_next_reel (int tape_des)
error (PAXEXIT_FAILURE, 0, _("internal error: tape descriptor changed from %d to %d"),
old_tape_des, tape_des);
- free (new_name.ds_string);
+ ds_free (&new_name);
fclose (tty_in);
fclose (tty_out);
}
@@ -1412,8 +1408,28 @@ set_file_times (int fd,
utime_error (name);
}
+/* Reallocate file_hdr->c_name to accomodate len bytes (including final \0) */
+void
+cpio_realloc_c_name (struct cpio_file_stat *file_hdr, size_t len)
+{
+ while (file_hdr->c_name_buflen < len)
+ file_hdr->c_name = x2realloc (file_hdr->c_name, &file_hdr->c_name_buflen);
+}
+
+void
+cpio_set_c_name (struct cpio_file_stat *file_hdr, char *name)
+{
+ size_t len = strlen (name) + 1;
+
+ cpio_realloc_c_name (file_hdr, len);
+ file_hdr->c_namesize = len;
+ memmove (file_hdr->c_name, name, len);
+}
+
/* Do we have to ignore absolute paths, and if so, does the filename
- have an absolute path? */
+ have an absolute path? Before calling this function make sure that the
+ allocated NAME buffer has capacity at least 2 bytes. */
+
void
cpio_safer_name_suffix (char *name, bool link_target, bool absolute_names,
bool strip_leading_dots)
@@ -1428,6 +1444,10 @@ cpio_safer_name_suffix (char *name, bool link_target, bool absolute_names,
++p;
}
if (p != name)
+ /* The 'p' string is shortened version of 'name' with one exception; when
+ the 'name' points to an empty string (buffer where name[0] == '\0') the
+ 'p' then points to static string ".". So caller needs to ensure there
+ are at least two bytes available in 'name' buffer so memmove succeeds. */
memmove (name, p, (size_t)(strlen (p) + 1));
}
@@ -1689,4 +1709,17 @@ arf_stores_inode_p (enum archive_format arf)
}
return 1;
}
+
+void
+cpio_file_stat_init (struct cpio_file_stat *file_hdr)
+{
+ memset (file_hdr, 0, sizeof (*file_hdr));
+}
+
+void
+cpio_file_stat_free (struct cpio_file_stat *file_hdr)
+{
+ free (file_hdr->c_name);
+ cpio_file_stat_init (file_hdr);
+}
--
2.31.1