/* util.c -- functions for initializing new tree elements, and other things.
Copyright (C) 1990-2021 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/>.
*/
/* config.h must always come first. */
#include <config.h>
/* system headers. */
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <string.h>
#include <sys/stat.h> /* for fstatat() */
#include <sys/time.h>
#include <sys/utsname.h>
/* gnulib headers. */
#include "error.h"
#include "fdleak.h"
#include "progname.h"
#include "quotearg.h"
#include "save-cwd.h"
#include "timespec.h"
#include "xalloc.h"
/* find headers. */
#include "defs.h"
#include "die.h"
#include "dircallback.h"
#include "bugreports.h"
#include "system.h"
struct debug_option_assoc
{
const char *name;
int val;
const char *docstring;
};
static struct debug_option_assoc debugassoc[] =
{
{ "exec", DebugExec, "Show diagnostic information relating to -exec, -execdir, -ok and -okdir" },
{ "opt", DebugExpressionTree|DebugTreeOpt, "Show diagnostic information relating to optimisation" },
{ "rates", DebugSuccessRates, "Indicate how often each predicate succeeded" },
{ "search",DebugSearch, "Navigate the directory tree verbosely" },
{ "stat", DebugStat, "Trace calls to stat(2) and lstat(2)" },
{ "time", DebugTime, "Show diagnostic information relating to time-of-day and timestamp comparisons" },
{ "tree", DebugExpressionTree, "Display the expression tree" },
{ "all", DebugAll, "Set all of the debug flags (but help)" },
{ "help", DebugHelp, "Explain the various -D options" },
};
#define N_DEBUGASSOC (sizeof(debugassoc)/sizeof(debugassoc[0]))
/* Add a primary of predicate type PRED_FUNC (described by ENTRY) to the predicate input list.
Return a pointer to the predicate node just inserted.
Fills in the following cells of the new predicate node:
pred_func PRED_FUNC
args(.str) NULL
p_type PRIMARY_TYPE
p_prec NO_PREC
Other cells that need to be filled in are defaulted by
get_new_pred_chk_op, which is used to ensure that the prior node is
either not there at all (we are the very first node) or is an
operator. */
struct predicate *
insert_primary_withpred (const struct parser_table *entry,
PRED_FUNC pred_func,
const char *arg)
{
struct predicate *new_pred;
new_pred = get_new_pred_chk_op (entry, arg);
new_pred->pred_func = pred_func;
new_pred->p_name = entry->parser_name;
new_pred->args.str = NULL;
new_pred->p_type = PRIMARY_TYPE;
new_pred->p_prec = NO_PREC;
return new_pred;
}
/* Add a primary described by ENTRY to the predicate input list.
Return a pointer to the predicate node just inserted.
Fills in the following cells of the new predicate node:
pred_func PRED_FUNC
args(.str) NULL
p_type PRIMARY_TYPE
p_prec NO_PREC
Other cells that need to be filled in are defaulted by
get_new_pred_chk_op, which is used to insure that the prior node is
either not there at all (we are the very first node) or is an
operator. */
struct predicate *
insert_primary (const struct parser_table *entry, const char *arg)
{
assert (entry->pred_func != NULL);
return insert_primary_withpred (entry, entry->pred_func, arg);
}
struct predicate *
insert_primary_noarg (const struct parser_table *entry)
{
return insert_primary (entry, NULL);
}
static void
show_valid_debug_options (int full)
{
size_t i;
fputs (_("Valid arguments for -D:\n"), stdout);
if (full)
{
for (i=0; i<N_DEBUGASSOC; ++i)
{
fprintf (stdout, "%-10s %s\n",
debugassoc[i].name,
debugassoc[i].docstring);
}
}
else
{
for (i=0; i<N_DEBUGASSOC; ++i)
{
fprintf (stdout, "%s%s", (i>0 ? ", " : ""), debugassoc[i].name);
}
}
}
void
usage (int status)
{
if (status != EXIT_SUCCESS)
{
fprintf (stderr, _("Try '%s --help' for more information.\n"), program_name);
exit (status);
}
#define HTL(t) fputs (t, stdout);
fprintf (stdout, _("\
Usage: %s [-H] [-L] [-P] [-Olevel] [-D debugopts] [path...] [expression]\n"),
program_name);
HTL (_("\n\
default path is the current directory; default expression is -print\n\
expression may consist of: operators, options, tests, and actions:\n"));
HTL (_("\
operators (decreasing precedence; -and is implicit where no others are given):\n\
( EXPR ) ! EXPR -not EXPR EXPR1 -a EXPR2 EXPR1 -and EXPR2\n\
EXPR1 -o EXPR2 EXPR1 -or EXPR2 EXPR1 , EXPR2\n"));
HTL (_("\
positional options (always true): -daystart -follow -regextype\n\n\
normal options (always true, specified before other expressions):\n\
-depth --help -maxdepth LEVELS -mindepth LEVELS -mount -noleaf\n\
--version -xdev -ignore_readdir_race -noignore_readdir_race\n"));
HTL (_("\
tests (N can be +N or -N or N): -amin N -anewer FILE -atime N -cmin N\n\
-cnewer FILE -ctime N -empty -false -fstype TYPE -gid N -group NAME\n\
-ilname PATTERN -iname PATTERN -inum N -iwholename PATTERN -iregex PATTERN\n\
-links N -lname PATTERN -mmin N -mtime N -name PATTERN -newer FILE"));
HTL (_("\n\
-nouser -nogroup -path PATTERN -perm [-/]MODE -regex PATTERN\n\
-readable -writable -executable\n\
-wholename PATTERN -size N[bcwkMG] -true -type [bcdpflsD] -uid N\n\
-used N -user NAME -xtype [bcdpfls]"));
HTL (_("\
-context CONTEXT\n"));
HTL (_("\n\
actions: -delete -print0 -printf FORMAT -fprintf FILE FORMAT -print \n\
-fprint0 FILE -fprint FILE -ls -fls FILE -prune -quit\n\
-exec COMMAND ; -exec COMMAND {} + -ok COMMAND ;\n\
-execdir COMMAND ; -execdir COMMAND {} + -okdir COMMAND ;\n\
\n"));
show_valid_debug_options (0);
HTL (_("\n\
Use '-D help' for a description of the options, or see find(1)\n\
\n"));
explain_how_to_report_bugs (stdout, program_name);
exit (status);
}
void
set_stat_placeholders (struct stat *p)
{
(void) p; /* silence warning for systems lacking these fields. */
#if HAVE_STRUCT_STAT_ST_BIRTHTIME
p->st_birthtime = 0;
#endif
#if HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC
p->st_birthtimensec = 0;
#endif
#if HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC
p->st_birthtimespec.tv_nsec = -1;
#endif
#if HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_SEC
p->st_birthtimespec.tv_sec = 0;
#else
/* Avoid pointless compiler warning about unused parameters if none of these
macros are set to nonzero values. */
(void) p;
#endif
}
/* Get the stat information for a file, if it is
* not already known. Returns 0 on success.
*/
int
get_statinfo (const char *pathname, const char *name, struct stat *p)
{
/* Set markers in fields so we have a good idea if the implementation
* didn't bother to set them (e.g., NetBSD st_birthtimespec for MS-DOS
* files)
*/
if (!state.have_stat)
{
set_stat_placeholders (p);
if (0 == (*options.xstat) (name, p))
{
if (00000 == p->st_mode)
{
/* Savannah bug #16378. */
error (0, 0, _("WARNING: file %s appears to have mode 0000"),
quotearg_n_style (0, options.err_quoting_style, name));
error_severity (1);
}
}
else
{
if (!options.ignore_readdir_race || (errno != ENOENT) )
{
nonfatal_target_file_error (errno, pathname);
}
return -1;
}
}
state.have_stat = true;
state.have_type = true;
state.type = p->st_mode;
return 0;
}
/* Get the stat/type/inode information for a file, if it is not
* already known. Returns 0 on success (or if we did nothing).
*/
int
get_info (const char *pathname,
struct stat *p,
struct predicate *pred_ptr)
{
bool todo = false;
/* If we need the full stat info, or we need the type info but don't
* already have it, stat the file now.
*/
if (pred_ptr->need_stat)
{
todo = true; /* need full stat info */
}
else if (pred_ptr->need_type && !state.have_type)
{
todo = true; /* need to stat to get the type */
}
else if (pred_ptr->need_inum)
{
if (!p->st_ino)
{
todo = true; /* need to stat to get the inode number */
}
else if ((!state.have_type) || S_ISDIR(p->st_mode))
{
/* For now we decide not to trust struct dirent.d_ino for
* directory entries that are subdirectories, in case this
* subdirectory is a mount point. We also need to call a
* stat function if we don't have st_ino (i.e. it is zero).
*/
todo = true;
}
}
if (todo)
{
int result = get_statinfo (pathname, state.rel_pathname, p);
if (result != 0)
{
return -1; /* failure. */
}
else
{
/* Verify some postconditions. We can't check st_mode for
non-zero-ness because of Savannah bug #16378 (which is
that broken NFS servers can return st_mode==0). */
if (pred_ptr->need_type)
{
assert (state.have_type);
}
if (pred_ptr->need_inum)
{
assert (p->st_ino);
}
return 0; /* success. */
}
}
else
{
return 0; /* success; nothing to do. */
}
}
/* Determine if we can use O_NOFOLLOW.
*/
#if defined O_NOFOLLOW
bool
check_nofollow (void)
{
struct utsname uts;
float release;
if (0 == O_NOFOLLOW)
{
return false;
}
if (0 == uname (&uts))
{
/* POSIX requires that atof ignores "unrecognised suffixes"; we specifically
* want that behaviour. */
double (*conversion)(const char*) = atof; /* avoid sc_prohibit_atoi_atof check. */
release = conversion (uts.release);
if (0 == strcmp ("Linux", uts.sysname))
{
/* Linux kernels 2.1.126 and earlier ignore the O_NOFOLLOW flag. */
return release >= 2.2f; /* close enough */
}
else if (0 == strcmp ("FreeBSD", uts.sysname))
{
/* FreeBSD 3.0-CURRENT and later support it */
return release >= 3.1f;
}
}
/* Well, O_NOFOLLOW was defined, so we'll try to use it. */
return true;
}
#endif
static int
exec_cb (void *context)
{
struct exec_val *execp = context;
bc_do_exec (&execp->ctl, &execp->state);
return 0;
}
static void
do_exec (struct exec_val *execp)
{
run_in_dir (execp->wd_for_exec, exec_cb, execp);
if (execp->wd_for_exec != initial_wd)
{
free_cwd (execp->wd_for_exec);
free (execp->wd_for_exec);
execp->wd_for_exec = NULL;
}
}
/* Examine the predicate list for instances of -execdir or -okdir
* which have been terminated with '+' (build argument list) rather
* than ';' (singles only). If there are any, run them (this will
* have no effect if there are no arguments waiting).
*/
static void
do_complete_pending_execdirs (struct predicate *p)
{
if (NULL == p)
return;
assert (state.execdirs_outstanding);
do_complete_pending_execdirs (p->pred_left);
if (pred_is (p, pred_execdir) || pred_is(p, pred_okdir))
{
/* It's an exec-family predicate. p->args.exec_val is valid. */
if (p->args.exec_vec.multiple)
{
struct exec_val *execp = &p->args.exec_vec;
/* This one was terminated by '+' and so might have some
* left... Run it if necessary.
*/
if (execp->state.todo)
{
/* There are not-yet-executed arguments. */
do_exec (execp);
}
}
}
do_complete_pending_execdirs (p->pred_right);
}
void
complete_pending_execdirs (void)
{
if (state.execdirs_outstanding)
{
do_complete_pending_execdirs (get_eval_tree());
state.execdirs_outstanding = false;
}
}
/* Examine the predicate list for instances of -exec which have been
* terminated with '+' (build argument list) rather than ';' (singles
* only). If there are any, run them (this will have no effect if
* there are no arguments waiting).
*/
void
complete_pending_execs (struct predicate *p)
{
if (NULL == p)
return;
complete_pending_execs (p->pred_left);
/* It's an exec-family predicate then p->args.exec_val is valid
* and we can check it.
*/
/* XXX: what about pred_ok() ? */
if (pred_is (p, pred_exec) && p->args.exec_vec.multiple)
{
struct exec_val *execp = &p->args.exec_vec;
/* This one was terminated by '+' and so might have some
* left... Run it if necessary. Set state.exit_status if
* there are any problems.
*/
if (execp->state.todo)
{
/* There are not-yet-executed arguments. */
bc_do_exec (&execp->ctl, &execp->state);
}
}
complete_pending_execs (p->pred_right);
}
void
record_initial_cwd (void)
{
initial_wd = xmalloc (sizeof (*initial_wd));
if (0 != save_cwd (initial_wd))
{
die (EXIT_FAILURE, errno,
_("Failed to save initial working directory%s%s"),
(initial_wd->desc < 0 && initial_wd->name) ? ": " : "",
(initial_wd->desc < 0 && initial_wd->name) ? initial_wd->name : "");
}
}
static void
cleanup_initial_cwd (void)
{
if (0 == restore_cwd (initial_wd))
{
free_cwd (initial_wd);
free (initial_wd);
initial_wd = NULL;
}
else
{
/* since we may already be in atexit, die with _exit(). */
error (0, errno,
_("Failed to restore initial working directory%s%s"),
(initial_wd->desc < 0 && initial_wd->name) ? ": " : "",
(initial_wd->desc < 0 && initial_wd->name) ? initial_wd->name : "");
_exit (EXIT_FAILURE);
}
}
static void
traverse_tree (struct predicate *tree,
void (*callback)(struct predicate*))
{
if (tree->pred_left)
traverse_tree (tree->pred_left, callback);
callback (tree);
if (tree->pred_right)
traverse_tree (tree->pred_right, callback);
}
/* After sharefile_destroy is called, our output file
* pointers will be dangling (fclose will already have
* been called on them). NULL these out.
*/
static void
undangle_file_pointers (struct predicate *p)
{
if (pred_is (p, pred_fprint)
|| pred_is (p, pred_fprintf)
|| pred_is (p, pred_fls)
|| pred_is (p, pred_fprint0))
{
/* The file was already fclose()d by sharefile_destroy. */
p->args.printf_vec.stream = NULL;
}
}
/* Complete any outstanding commands.
* Flush and close any open files.
*/
void
cleanup (void)
{
struct predicate *eval_tree = get_eval_tree ();
if (eval_tree)
{
traverse_tree (eval_tree, complete_pending_execs);
complete_pending_execdirs ();
}
/* Close output files and NULL out references to them. */
sharefile_destroy (state.shared_files);
if (eval_tree)
traverse_tree (eval_tree, undangle_file_pointers);
cleanup_initial_cwd ();
if (fd_leak_check_is_enabled ())
{
complain_about_leaky_fds ();
forget_non_cloexec_fds ();
}
if (fflush (stdout) == EOF)
nonfatal_nontarget_file_error (errno, "standard output");
}
static int
fallback_stat (const char *name, struct stat *p, int prev_rv)
{
/* Our original stat() call failed. Perhaps we can't follow a
* symbolic link. If that might be the problem, lstat() the link.
* Otherwise, admit defeat.
*/
switch (errno)
{
case ENOENT:
case ENOTDIR:
if (options.debug_options & DebugStat)
fprintf(stderr, "fallback_stat(): stat(%s) failed; falling back on lstat()\n", name);
return fstatat(state.cwd_dir_fd, name, p, AT_SYMLINK_NOFOLLOW);
case EACCES:
case EIO:
case ELOOP:
case ENAMETOOLONG:
#ifdef EOVERFLOW
case EOVERFLOW: /* EOVERFLOW is not #defined on UNICOS. */
#endif
default:
return prev_rv;
}
}
/* optionh_stat() implements the stat operation when the -H option is
* in effect.
*
* If the item to be examined is a command-line argument, we follow
* symbolic links. If the stat() call fails on the command-line item,
* we fall back on the properties of the symbolic link.
*
* If the item to be examined is not a command-line argument, we
* examine the link itself.
*/
int
optionh_stat (const char *name, struct stat *p)
{
if (AT_FDCWD != state.cwd_dir_fd)
assert (state.cwd_dir_fd >= 0);
set_stat_placeholders (p);
if (0 == state.curdepth)
{
/* This file is from the command line; deference the link (if it
* is a link).
*/
int rv;
rv = fstatat (state.cwd_dir_fd, name, p, 0);
if (0 == rv)
return 0; /* success */
else
return fallback_stat (name, p, rv);
}
else
{
/* Not a file on the command line; do not dereference the link.
*/
return fstatat (state.cwd_dir_fd, name, p, AT_SYMLINK_NOFOLLOW);
}
}
/* optionl_stat() implements the stat operation when the -L option is
* in effect. That option makes us examine the thing the symbolic
* link points to, not the symbolic link itself.
*/
int
optionl_stat(const char *name, struct stat *p)
{
int rv;
if (AT_FDCWD != state.cwd_dir_fd)
assert (state.cwd_dir_fd >= 0);
set_stat_placeholders (p);
rv = fstatat (state.cwd_dir_fd, name, p, 0);
if (0 == rv)
return 0; /* normal case. */
else
return fallback_stat (name, p, rv);
}
/* optionp_stat() implements the stat operation when the -P option is
* in effect (this is also the default). That option makes us examine
* the symbolic link itself, not the thing it points to.
*/
int
optionp_stat (const char *name, struct stat *p)
{
assert ((state.cwd_dir_fd >= 0) || (state.cwd_dir_fd==AT_FDCWD));
set_stat_placeholders (p);
return fstatat (state.cwd_dir_fd, name, p, AT_SYMLINK_NOFOLLOW);
}
static uintmax_t stat_count = 0u;
int
debug_stat (const char *file, struct stat *bufp)
{
++stat_count;
fprintf (stderr, "debug_stat (%s)\n", file);
switch (options.symlink_handling)
{
case SYMLINK_ALWAYS_DEREF:
return optionl_stat (file, bufp);
case SYMLINK_DEREF_ARGSONLY:
return optionh_stat (file, bufp);
case SYMLINK_NEVER_DEREF:
return optionp_stat (file, bufp);
}
/*NOTREACHED*/
assert (0);
return -1;
}
bool
following_links(void)
{
switch (options.symlink_handling)
{
case SYMLINK_ALWAYS_DEREF:
return true;
case SYMLINK_DEREF_ARGSONLY:
return (state.curdepth == 0);
case SYMLINK_NEVER_DEREF:
default:
return false;
}
}
/* Take a "mode" indicator and fill in the files of 'state'.
*/
bool
digest_mode (mode_t *mode,
const char *pathname,
const char *name,
struct stat *pstat,
bool leaf)
{
/* If we know the type of the directory entry, and it is not a
* symbolic link, we may be able to avoid a stat() or lstat() call.
*/
if (*mode)
{
if (S_ISLNK(*mode) && following_links())
{
/* mode is wrong because we should have followed the symlink. */
if (get_statinfo (pathname, name, pstat) != 0)
return false;
*mode = state.type = pstat->st_mode;
state.have_type = true;
}
else
{
state.have_type = true;
pstat->st_mode = state.type = *mode;
}
}
else
{
/* Mode is not yet known; may have to stat the file unless we
* can deduce that it is not a directory (which is all we need to
* know at this stage)
*/
if (leaf)
{
state.have_stat = false;
state.have_type = false;
state.type = 0;
}
else
{
if (get_statinfo (pathname, name, pstat) != 0)
return false;
/* If -L is in effect and we are dealing with a symlink,
* st_mode is the mode of the pointed-to file, while mode is
* the mode of the directory entry (S_IFLNK). Hence now
* that we have the stat information, override "mode".
*/
state.type = *mode = pstat->st_mode;
state.have_type = true;
}
}
/* success. */
return true;
}
/* Return true if there are no predicates with no_default_print in
predicate list PRED, false if there are any.
Returns true if default print should be performed */
bool
default_prints (struct predicate *pred)
{
while (pred != NULL)
{
if (pred->no_default_print)
return (false);
pred = pred->pred_next;
}
return (true);
}
bool
looks_like_expression (const char *arg, bool leading)
{
switch (arg[0])
{
case '-':
if (arg[1]) /* "-foo" is an expression. */
return true;
else
return false; /* Just "-" is a filename. */
break;
case ')':
case ',':
if (arg[1])
return false; /* )x and ,z are not expressions */
else
return !leading; /* A leading ) or , is not either */
/* ( and ! are part of an expression, but (2 and !foo are
* filenames.
*/
case '!':
case '(':
if (arg[1])
return false;
else
return true;
default:
return false;
}
}
static void
process_debug_options (char *arg)
{
const char *p;
char *token_context = NULL;
const char delimiters[] = ",";
bool empty = true;
size_t i;
p = strtok_r (arg, delimiters, &token_context);
while (p)
{
empty = false;
for (i=0; i<N_DEBUGASSOC; ++i)
{
if (0 == strcmp (debugassoc[i].name, p))
{
options.debug_options |= debugassoc[i].val;
break;
}
}
if (i >= N_DEBUGASSOC)
{
error (0, 0, _("Ignoring unrecognised debug flag %s"),
quotearg_n_style (0, options.err_quoting_style, arg));
}
p = strtok_r (NULL, delimiters, &token_context);
}
if (empty)
{
error (0, 0, _("Empty argument to the -D option."));
usage (EXIT_FAILURE);
}
else if (options.debug_options & DebugHelp)
{
show_valid_debug_options (1);
exit (EXIT_SUCCESS);
}
}
static void
process_optimisation_option (const char *arg)
{
if (0 == arg[0])
{
die (EXIT_FAILURE, 0,
_("The -O option must be immediately followed by a decimal integer"));
}
else
{
unsigned long opt_level;
char *end;
if (!isdigit ( (unsigned char) arg[0] ))
{
die (EXIT_FAILURE, 0,
_("Please specify a decimal number immediately after -O"));
}
else
{
int prev_errno = errno;
errno = 0;
opt_level = strtoul (arg, &end, 10);
if ( (0==opt_level) && (end==arg) )
{
die (EXIT_FAILURE, 0,
_("Please specify a decimal number immediately after -O"));
}
else if (*end)
{
/* unwanted trailing characters. */
die (EXIT_FAILURE, 0, _("Invalid optimisation level %s"), arg);
}
else if ( (ULONG_MAX==opt_level) && errno)
{
die (EXIT_FAILURE, errno,
_("Invalid optimisation level %s"), arg);
}
else if (opt_level > USHRT_MAX)
{
/* tricky to test, as on some platforms USHORT_MAX and ULONG_MAX
* can have the same value, though this is unusual.
*/
die (EXIT_FAILURE, 0,
_("Optimisation level %lu is too high. "
"If you want to find files very quickly, "
"consider using GNU locate."),
opt_level);
}
else
{
options.optimisation_level = opt_level;
errno = prev_errno;
}
}
}
}
int
process_leading_options (int argc, char *argv[])
{
int i, end_of_leading_options;
for (i=1; (end_of_leading_options = i) < argc; ++i)
{
if (0 == strcmp ("-H", argv[i]))
{
/* Meaning: dereference symbolic links on command line, but nowhere else. */
set_follow_state (SYMLINK_DEREF_ARGSONLY);
}
else if (0 == strcmp ("-L", argv[i]))
{
/* Meaning: dereference all symbolic links. */
set_follow_state (SYMLINK_ALWAYS_DEREF);
}
else if (0 == strcmp ("-P", argv[i]))
{
/* Meaning: never dereference symbolic links (default). */
set_follow_state (SYMLINK_NEVER_DEREF);
}
else if (0 == strcmp ("--", argv[i]))
{
/* -- signifies the end of options. */
end_of_leading_options = i+1; /* Next time start with the next option */
break;
}
else if (0 == strcmp ("-D", argv[i]))
{
if (argc <= i+1)
{
error (0, 0, _("Missing argument after the -D option."));
usage (EXIT_FAILURE);
}
process_debug_options (argv[i+1]);
++i; /* skip the argument too. */
}
else if (0 == strncmp ("-O", argv[i], 2))
{
process_optimisation_option (argv[i]+2);
}
else
{
/* Hmm, must be one of
* (a) A path name
* (b) A predicate
*/
end_of_leading_options = i; /* Next time start with this option */
break;
}
}
return end_of_leading_options;
}
static struct timespec
now(void)
{
struct timespec retval;
struct timeval tv;
time_t t;
if (0 == gettimeofday (&tv, NULL))
{
retval.tv_sec = tv.tv_sec;
retval.tv_nsec = tv.tv_usec * 1000; /* convert unit from microseconds to nanoseconds */
return retval;
}
t = time (NULL);
assert (t != (time_t)-1);
retval.tv_sec = t;
retval.tv_nsec = 0;
return retval;
}
void
set_option_defaults (struct options *p)
{
if (getenv ("POSIXLY_CORRECT"))
p->posixly_correct = true;
else
p->posixly_correct = false;
/* We call check_nofollow() before setlocale() because the numbers
* for which we check (in the results of uname) definitiely have "."
* as the decimal point indicator even under locales for which that
* is not normally true. Hence atof would do the wrong thing
* if we call it after setlocale().
*/
#ifdef O_NOFOLLOW
p->open_nofollow_available = check_nofollow ();
#else
p->open_nofollow_available = false;
#endif
p->regex_options = RE_SYNTAX_EMACS;
if (isatty (0))
{
p->warnings = false;
p->literal_control_chars = false;
}
else
{
p->warnings = false;
p->literal_control_chars = false; /* may change */
}
if (p->posixly_correct)
{
p->warnings = false;
}
p->do_dir_first = true;
p->explicit_depth = false;
p->maxdepth = p->mindepth = -1;
p->start_time = now ();
p->cur_day_start.tv_sec = p->start_time.tv_sec - DAYSECS;
p->cur_day_start.tv_nsec = p->start_time.tv_nsec;
p->full_days = false;
p->stay_on_filesystem = false;
p->ignore_readdir_race = false;
if (p->posixly_correct)
p->output_block_size = 512;
else
p->output_block_size = 1024;
p->debug_options = 0uL;
p->optimisation_level = 2;
if (getenv ("FIND_BLOCK_SIZE"))
{
die (EXIT_FAILURE, 0,
_("The environment variable FIND_BLOCK_SIZE is not supported, "
"the only thing that affects the block size is the "
"POSIXLY_CORRECT environment variable"));
}
#if LEAF_OPTIMISATION
/* The leaf optimisation is enabled. */
p->no_leaf_check = false;
#else
/* The leaf optimisation is disabled. */
p->no_leaf_check = true;
#endif
set_follow_state (SYMLINK_NEVER_DEREF); /* The default is equivalent to -P. */
p->err_quoting_style = locale_quoting_style;
}
/* apply_predicate
*
*/
bool
apply_predicate(const char *pathname, struct stat *stat_buf, struct predicate *p)
{
++p->perf.visits;
if (p->need_stat || p->need_type || p->need_inum)
{
/* We may need a stat here. */
if (get_info(pathname, stat_buf, p) != 0)
return false;
}
if ((p->pred_func)(pathname, stat_buf, p))
{
++(p->perf.successes);
return true;
}
else
{
return false;
}
}
/* is_exec_in_local_dir
*
*/
bool
is_exec_in_local_dir (const PRED_FUNC pred_func)
{
return pred_execdir == pred_func || pred_okdir == pred_func;
}
/* safely_quote_err_filename
*
*/
const char *
safely_quote_err_filename (int n, char const *arg)
{
return quotearg_n_style (n, options.err_quoting_style, arg);
}
/* We have encountered an error which should affect the exit status.
* This is normally used to change the exit status from 0 to 1.
* However, if the exit status is already 2 for example, we don't want to
* reduce it to 1.
*/
void
error_severity (int level)
{
if (state.exit_status < level)
state.exit_status = level;
}
/* report_file_err
*/
static void
report_file_err(int exitval, int errno_value,
bool is_target_file, const char *name)
{
/* It is important that the errno value is passed in as a function
* argument before we call safely_quote_err_filename(), because otherwise
* we might find that safely_quote_err_filename() changes errno.
*/
if (!is_target_file || !state.already_issued_stat_error_msg)
{
error (exitval, errno_value, "%s", safely_quote_err_filename (0, name));
error_severity (1);
}
if (is_target_file)
{
state.already_issued_stat_error_msg = true;
}
}
/* nonfatal_target_file_error
*/
void
nonfatal_target_file_error (int errno_value, const char *name)
{
report_file_err (0, errno_value, true, name);
}
/* fatal_target_file_error
*
* Report an error on a target file (i.e. a file we are searching).
* Such errors are only reported once per searched file.
*
*/
void
fatal_target_file_error(int errno_value, const char *name)
{
report_file_err (1, errno_value, true, name);
/*NOTREACHED*/
abort ();
}
/* nonfatal_nontarget_file_error
*
*/
void
nonfatal_nontarget_file_error (int errno_value, const char *name)
{
report_file_err (0, errno_value, false, name);
}
/* fatal_nontarget_file_error
*
*/
void
fatal_nontarget_file_error(int errno_value, const char *name)
{
/* We're going to exit fatally, so make sure we always isssue the error
* message, even if it will be duplicate. Motivation: otherwise it may
* not be clear what went wrong.
*/
state.already_issued_stat_error_msg = false;
report_file_err (1, errno_value, false, name);
/*NOTREACHED*/
abort ();
}
Radix cross Linux
The main Radix cross Linux repository contains the build scripts of packages, which have the most complete and common functionality for desktop machines
452 Commits
2 Branches
1 Tag