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maint: pacify -Wzero-as-null-pointer-constant

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Recent Gnulib enables this warning, and it did find a bug
in GNU Tar, so pacify GCC everywhere else by preferring
NULL to 0 for pointers.
This commit is contained in:
Paul Eggert
2026-01-23 17:38:38 -08:00
parent 29bb75ed65
commit 8fca6143ea
12 changed files with 157 additions and 156 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/create.c
+12 -12
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@@ -245,7 +245,7 @@ to_chars_subst (bool negative, bool gnu_format, uintmax_t value, int valsize,
paxwarn (0, _("value %s%ju out of %s range %jd..%ju;"
" substituting %s%ju"),
valuesign, value, type, minval, maxval, ssign, s);
return to_chars (negsub, s, valsize, 0, where, size, type);
return to_chars (negsub, s, valsize, NULL, where, size, type);
}
else
paxerror (0, _("value %s%ju out of %s range %jd..%ju"),
@@ -349,13 +349,13 @@ gid_to_chars (gid_t v, char *p, int s)
static bool
major_to_chars (major_t v, char *p, int s)
{
return to_chars (v < 0, v, sizeof v, 0, p, s, "major_t");
return to_chars (v < 0, v, sizeof v, NULL, p, s, "major_t");
}
static bool
minor_to_chars (minor_t v, char *p, int s)
{
return to_chars (v < 0, v, sizeof v, 0, p, s, "minor_t");
return to_chars (v < 0, v, sizeof v, NULL, p, s, "minor_t");
}
static bool
@@ -395,19 +395,19 @@ mode_to_chars (mode_t v, char *p, int s)
| (v & S_IWOTH ? TOWRITE : 0)
| (v & S_IXOTH ? TOEXEC : 0));
}
return to_chars (negative, u, sizeof v, 0, p, s, "mode_t");
return to_chars (negative, u, sizeof v, NULL, p, s, "mode_t");
}
bool
off_to_chars (off_t v, char *p, int s)
{
return to_chars (v < 0, v, sizeof v, 0, p, s, "off_t");
return to_chars (v < 0, v, sizeof v, NULL, p, s, "off_t");
}
bool
time_to_chars (time_t v, char *p, int s)
{
return to_chars (v < 0, v, sizeof v, 0, p, s, "time_t");
return to_chars (v < 0, v, sizeof v, NULL, p, s, "time_t");
}
static uintmax_t
@@ -1264,7 +1264,7 @@ get_directory_entries (struct tar_stat_info *st)
{
while (! (st->dirstream = fdopendir (st->fd)))
if (! open_failure_recover (st))
return 0;
return NULL;
return streamsavedir (st->dirstream, savedir_sort_order);
}
@@ -1317,7 +1317,7 @@ create_archive (void)
while ((p = name_from_list ()) != NULL)
if (!excluded_name (p->name, NULL))
dump_file (0, p->name, p->name);
dump_file (NULL, p->name, p->name);
blank_name_list ();
while ((p = name_from_list ()) != NULL)
@@ -1377,7 +1377,7 @@ create_archive (void)
const char *name;
while ((name = name_next (true)))
if (!excluded_name (name, NULL))
dump_file (0, name, name);
dump_file (NULL, name, name);
}
write_eot ();
@@ -1498,8 +1498,8 @@ file_count_links (struct tar_stat_info *st)
free (linkname);
if (! ((link_table
|| (link_table = hash_initialize (0, 0, hash_link,
compare_links, 0)))
|| (link_table = hash_initialize (0, NULL, hash_link,
compare_links, NULL)))
&& (duplicate = hash_insert (link_table, lp))))
xalloc_die ();
@@ -1620,7 +1620,7 @@ dump_file0 (struct tar_stat_info *st, char const *name, char const *p)
bool is_dir;
struct tar_stat_info const *parent = st->parent;
bool top_level = ! parent;
void (*diag) (char const *) = 0;
void (*diag) (char const *) = NULL;
if (interactive_option && !confirm ("add", p))
return NULL;