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-rw-r--r--findutils/find.c433
1 files changed, 260 insertions, 173 deletions
diff --git a/findutils/find.c b/findutils/find.c
index a3cbe668d..abd757662 100644
--- a/findutils/find.c
+++ b/findutils/find.c
@@ -23,62 +23,46 @@
* # find file.txt -exec 'echo' '{} {}' ';'
* file.txt file.txt
* (strace: execve("/bin/echo", ["echo", "file.txt file.txt"], [ 30 vars ]))
- *
- * bboxed find rev 16467: above - works, below - doesn't
- *
* # find file.txt -exec 'echo' '{} {}' ';' -print -exec pwd ';'
* file.txt file.txt
* file.txt
* /tmp
* # find -name '*.c' -o -name '*.h'
* [shows files, *.c and *.h intermixed]
+ * # find file.txt -name '*f*' -o -name '*t*'
+ * file.txt
+ * # find file.txt -name '*z*' -o -name '*t*'
+ * file.txt
+ * # find file.txt -name '*f*' -o -name '*z*'
+ * file.txt
*/
#include "busybox.h"
#include <fnmatch.h>
-static char *pattern;
-#if ENABLE_FEATURE_FIND_PRINT0
-static char printsep = '\n';
-#endif
-
-#if ENABLE_FEATURE_FIND_TYPE
-static int type_mask = 0;
-#endif
-
-#if ENABLE_FEATURE_FIND_PERM
-static char perm_char = 0;
-static int perm_mask = 0;
-#endif
-
-#if ENABLE_FEATURE_FIND_MTIME
-static char mtime_char;
-static int mtime_days;
-#endif
-
-#if ENABLE_FEATURE_FIND_MMIN
-static char mmin_char;
-static int mmin_mins;
-#endif
+USE_FEATURE_FIND_XDEV(static dev_t *xdev_dev;)
+USE_FEATURE_FIND_XDEV(static int xdev_count;)
-#if ENABLE_FEATURE_FIND_XDEV
-static dev_t *xdev_dev;
-static int xdev_count = 0;
-#endif
+typedef int (*action_fp)(const char *fileName, struct stat *statbuf, void *);
-#if ENABLE_FEATURE_FIND_NEWER
-static time_t newer_mtime;
-#endif
+typedef struct {
+ action_fp f;
+} action;
+#define SACT(name, arg...) typedef struct { action a; arg; } action_##name;
+#define SFUNC(name) static int func_##name(const char *fileName, struct stat *statbuf, action_##name* ap)
+ SACT(print)
+ SACT(name, char *pattern;)
+USE_FEATURE_FIND_PRINT0(SACT(print0))
+USE_FEATURE_FIND_TYPE( SACT(type, int type_mask;))
+USE_FEATURE_FIND_PERM( SACT(perm, char perm_char; int perm_mask;))
+USE_FEATURE_FIND_MTIME( SACT(mtime, char mtime_char; int mtime_days;))
+USE_FEATURE_FIND_MMIN( SACT(mmin, char mmin_char; int mmin_mins;))
+USE_FEATURE_FIND_NEWER( SACT(newer, time_t newer_mtime;))
+USE_FEATURE_FIND_INUM( SACT(inum, ino_t inode_num;))
+USE_FEATURE_FIND_EXEC( SACT(exec, char **exec_argv; int *subst_count; int exec_argc;))
-#if ENABLE_FEATURE_FIND_INUM
-static ino_t inode_num;
-#endif
+static action ***actions;
-#if ENABLE_FEATURE_FIND_EXEC
-static char **exec_argv;
-static int *subst_count;
-static int exec_argc;
-#endif
static int count_subst(const char *str)
{
@@ -109,102 +93,116 @@ static char* subst(const char *src, int count, const char* filename)
}
-static int fileAction(const char *fileName, struct stat *statbuf, void* junk, int depth)
+SFUNC(name)
{
-#if ENABLE_FEATURE_FIND_XDEV
- if (S_ISDIR(statbuf->st_mode) && xdev_count) {
- int i;
- for (i=0; i<xdev_count; i++) {
- if (xdev_dev[i] != statbuf->st_dev)
- return SKIP;
- }
- }
-#endif
- if (pattern != NULL) {
- const char *tmp = strrchr(fileName, '/');
-
- if (tmp == NULL)
- tmp = fileName;
- else
- tmp++;
- if (fnmatch(pattern, tmp, FNM_PERIOD) != 0)
- goto no_match;
- }
+ const char *tmp = strrchr(fileName, '/');
+ if (tmp == NULL)
+ tmp = fileName;
+ else
+ tmp++;
+ return fnmatch(ap->pattern, tmp, FNM_PERIOD) == 0;
+}
#if ENABLE_FEATURE_FIND_TYPE
- if (type_mask != 0) {
- if (!((statbuf->st_mode & S_IFMT) == type_mask))
- goto no_match;
- }
+SFUNC(type)
+{
+ return !((statbuf->st_mode & S_IFMT) == ap->type_mask);
+}
#endif
#if ENABLE_FEATURE_FIND_PERM
- if (perm_mask != 0) {
- if (!((isdigit(perm_char) && (statbuf->st_mode & 07777) == perm_mask) ||
- (perm_char == '-' && (statbuf->st_mode & perm_mask) == perm_mask) ||
- (perm_char == '+' && (statbuf->st_mode & perm_mask) != 0)))
- goto no_match;
- }
+SFUNC(perm)
+{
+ return !((isdigit(ap->perm_char) && (statbuf->st_mode & 07777) == ap->perm_mask)
+ || (ap->perm_char == '-' && (statbuf->st_mode & ap->perm_mask) == ap->perm_mask)
+ || (ap->perm_char == '+' && (statbuf->st_mode & ap->perm_mask) != 0));
+}
#endif
#if ENABLE_FEATURE_FIND_MTIME
- if (mtime_char != 0) {
- time_t file_age = time(NULL) - statbuf->st_mtime;
- time_t mtime_secs = mtime_days * 24 * 60 * 60;
- if (!((isdigit(mtime_char) && file_age >= mtime_secs &&
- file_age < mtime_secs + 24 * 60 * 60) ||
- (mtime_char == '+' && file_age >= mtime_secs + 24 * 60 * 60) ||
- (mtime_char == '-' && file_age < mtime_secs)))
- goto no_match;
- }
+SFUNC(mtime)
+{
+ time_t file_age = time(NULL) - statbuf->st_mtime;
+ time_t mtime_secs = ap->mtime_days * 24 * 60 * 60;
+ return !((isdigit(ap->mtime_char) && file_age >= mtime_secs
+ && file_age < mtime_secs + 24 * 60 * 60)
+ || (ap->mtime_char == '+' && file_age >= mtime_secs + 24 * 60 * 60)
+ || (ap->mtime_char == '-' && file_age < mtime_secs));
+}
#endif
#if ENABLE_FEATURE_FIND_MMIN
- if (mmin_char != 0) {
- time_t file_age = time(NULL) - statbuf->st_mtime;
- time_t mmin_secs = mmin_mins * 60;
- if (!((isdigit(mmin_char) && file_age >= mmin_secs &&
- file_age < mmin_secs + 60) ||
- (mmin_char == '+' && file_age >= mmin_secs + 60) ||
- (mmin_char == '-' && file_age < mmin_secs)))
- goto no_match;
- }
+SFUNC(mmin)
+{
+ time_t file_age = time(NULL) - statbuf->st_mtime;
+ time_t mmin_secs = ap->mmin_mins * 60;
+ return !((isdigit(ap->mmin_char) && file_age >= mmin_secs
+ && file_age < mmin_secs + 60)
+ || (ap->mmin_char == '+' && file_age >= mmin_secs + 60)
+ || (ap->mmin_char == '-' && file_age < mmin_secs));
+}
#endif
#if ENABLE_FEATURE_FIND_NEWER
- if (newer_mtime != 0) {
- time_t file_age = newer_mtime - statbuf->st_mtime;
- if (file_age >= 0)
- goto no_match;
- }
+SFUNC(newer)
+{
+ return (ap->newer_mtime >= statbuf->st_mtime);
+}
#endif
#if ENABLE_FEATURE_FIND_INUM
- if (inode_num != 0) {
- if (!(statbuf->st_ino == inode_num))
- goto no_match;
- }
+SFUNC(inum)
+{
+ return (statbuf->st_ino != ap->inode_num);
+}
#endif
#if ENABLE_FEATURE_FIND_EXEC
- if (exec_argc) {
- int i;
- char *argv[exec_argc+1];
- for (i = 0; i < exec_argc; i++)
- argv[i] = subst(exec_argv[i], subst_count[i], fileName);
- argv[i] = NULL; /* terminate the list */
- errno = 0;
- wait4pid(spawn(argv));
- if (errno)
- bb_perror_msg("%s", argv[0]);
- for (i = 0; i < exec_argc; i++)
- free(argv[i]);
- goto no_match;
- }
+SFUNC(exec)
+{
+ int i, rc;
+ char *argv[ap->exec_argc+1];
+ for (i = 0; i < ap->exec_argc; i++)
+ argv[i] = subst(ap->exec_argv[i], ap->subst_count[i], fileName);
+ argv[i] = NULL; /* terminate the list */
+ errno = 0;
+ rc = wait4pid(spawn(argv));
+ if (errno)
+ bb_perror_msg("%s", argv[0]);
+ for (i = 0; i < ap->exec_argc; i++)
+ free(argv[i]);
+ return rc == 0; /* return 1 if success */
+}
#endif
#if ENABLE_FEATURE_FIND_PRINT0
- printf("%s%c", fileName, printsep);
-#else
- puts(fileName);
+SFUNC(print0)
+{
+ printf("%s%c", fileName, '\0');
+ return TRUE;
+}
#endif
- no_match:
+SFUNC(print)
+{
+ puts(fileName);
return TRUE;
}
+
+static int fileAction(const char *fileName, struct stat *statbuf, void* junk, int depth)
+{
+ int cur_group;
+ int cur_action;
+ action **app, *ap;
+
+ cur_group = -1;
+ while ((app = actions[++cur_group])) {
+ cur_action = -1;
+ do {
+ ap = app[++cur_action];
+ } while (ap && ap->f(fileName, statbuf, ap));
+ if (!ap) {
+ /* all actions in group were successful */
+ break;
+ }
+ }
+ return TRUE;
+}
+
+
#if ENABLE_FEATURE_FIND_TYPE
static int find_type(char *type)
{
@@ -241,38 +239,127 @@ static int find_type(char *type)
}
#endif
+
int find_main(int argc, char **argv)
{
int dereference = FALSE;
int i, j, firstopt, status = EXIT_SUCCESS;
+ int cur_group;
+ int cur_action;
+ int need_default = 1;
+
+ action* alloc_action(int sizeof_struct, action_fp f)
+ {
+ action *ap;
+ actions[cur_group] = xrealloc(actions[cur_group], (cur_action+2) * sizeof(*actions));
+ actions[cur_group][cur_action++] = ap = xmalloc(sizeof_struct);
+ actions[cur_group][cur_action] = NULL;
+ ap->f = f;
+ return ap;
+ }
+#define ALLOC_ACTION(name) (action_##name*)alloc_action(sizeof(action_##name), (action_fp) func_##name)
for (firstopt = 1; firstopt < argc; firstopt++) {
if (argv[firstopt][0] == '-')
break;
}
+ if (firstopt == 1) {
+ argv[0] = ".";
+ argv--;
+ argc++;
+ firstopt++;
+ }
+
+// All options always return true. They always take effect,
+// rather than being processed only when their place in the
+// expression is reached
+// We implement: -follow, -xdev
+
+// Actions have side effects and return a true or false value
+// We implement: -print, -print0, -exec
+
+// The rest are tests.
+
+// Tests and actions are grouped by operators
+// ( expr ) Force precedence
+// ! expr True if expr is false
+// -not expr Same as ! expr
+// expr1 [-a[nd]] expr2 And; expr2 is not evaluated if expr1 is false
+// expr1 -o[r] expr2 Or; expr2 is not evaluated if expr1 is true
+// expr1 , expr2 List; both expr1 and expr2 are always evaluated
+// We implement: -a, -o
+
+ cur_group = 0;
+ cur_action = 0;
+ actions = xzalloc(sizeof(*actions)); /* actions[0] == NULL */
/* Parse any options */
for (i = firstopt; i < argc; i++) {
char *arg = argv[i];
char *arg1 = argv[i+1];
- if (strcmp(arg, "-follow") == 0)
+
+ /* --- Operators --- */
+ if (ENABLE_DESKTOP
+ && (strcmp(arg, "-a") == 0 || strcmp(arg, "-and") == 0)
+ ) {
+ /* no special handling required */
+ }
+ else if (strcmp(arg, "-o") == 0
+ USE_DESKTOP(|| strcmp(arg, "-or") == 0)
+ ) {
+ if (need_default)
+ (void) ALLOC_ACTION(print);
+ cur_group++;
+ actions = xrealloc(actions, (cur_group+1) * sizeof(*actions));
+ actions[cur_group] = NULL;
+ actions[cur_group+1] = NULL;
+ cur_action = 0;
+ need_default = 1;
+ }
+
+ /* --- Options --- */
+ else if (strcmp(arg, "-follow") == 0)
dereference = TRUE;
+#if ENABLE_FEATURE_FIND_XDEV
+ else if (strcmp(arg, "-xdev") == 0) {
+ struct stat stbuf;
+
+ xdev_count = firstopt - 1;
+ xdev_dev = xmalloc(xdev_count * sizeof(dev_t));
+ for (j = 1; j < firstopt; i++) {
+ /* not xstat(): shouldn't bomd out on
+ * "find not_exist exist -xdev" */
+ if (stat(argv[j], &stbuf)) stbuf.st_dev = -1L;
+ xdev_dev[j-1] = stbuf.st_dev;
+ }
+ }
+#endif
+ /* --- Tests and actions --- */
else if (strcmp(arg, "-print") == 0) {
- ;
+ need_default = 0;
+ (void) ALLOC_ACTION(print);
}
#if ENABLE_FEATURE_FIND_PRINT0
- else if (strcmp(arg, "-print0") == 0)
- printsep = '\0';
+ else if (strcmp(arg, "-print0") == 0) {
+ need_default = 0;
+ (void) ALLOC_ACTION(print0);
+ }
#endif
else if (strcmp(arg, "-name") == 0) {
+ action_name *ap;
if (++i == argc)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
- pattern = arg1;
+ ap = ALLOC_ACTION(name);
+ ap->pattern = arg1;
+ }
#if ENABLE_FEATURE_FIND_TYPE
- } else if (strcmp(arg, "-type") == 0) {
+ else if (strcmp(arg, "-type") == 0) {
+ action_type *ap;
if (++i == argc)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
- type_mask = find_type(arg1);
+ ap = ALLOC_ACTION(type);
+ ap->type_mask = find_type(arg1);
+ }
#endif
#if ENABLE_FEATURE_FIND_PERM
/* TODO:
@@ -281,68 +368,69 @@ int find_main(int argc, char **argv)
* -perm -mode All of the permission bits mode are set for the file.
* -perm +mode Any of the permission bits mode are set for the file.
*/
- } else if (strcmp(arg, "-perm") == 0) {
+ else if (strcmp(arg, "-perm") == 0) {
+ action_perm *ap;
if (++i == argc)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
- perm_mask = xstrtol_range(arg1, 8, 0, 07777);
- perm_char = arg1[0];
- if (perm_char == '-')
- perm_mask = -perm_mask;
+ ap = ALLOC_ACTION(perm);
+ ap->perm_mask = xstrtol_range(arg1, 8, 0, 07777);
+ ap->perm_char = arg1[0];
+ if (ap->perm_char == '-')
+ ap->perm_mask = -ap->perm_mask;
+ }
#endif
#if ENABLE_FEATURE_FIND_MTIME
- } else if (strcmp(arg, "-mtime") == 0) {
+ else if (strcmp(arg, "-mtime") == 0) {
+ action_mtime *ap;
if (++i == argc)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
- mtime_days = xatol(arg1);
- mtime_char = arg1[0];
- if (mtime_char == '-')
- mtime_days = -mtime_days;
+ ap = ALLOC_ACTION(mtime);
+ ap->mtime_days = xatol(arg1);
+ ap->mtime_char = arg1[0];
+ if (ap->mtime_char == '-')
+ ap->mtime_days = -ap->mtime_days;
+ }
#endif
#if ENABLE_FEATURE_FIND_MMIN
- } else if (strcmp(arg, "-mmin") == 0) {
+ else if (strcmp(arg, "-mmin") == 0) {
+ action_mmin *ap;
if (++i == argc)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
- mmin_mins = xatol(arg1);
- mmin_char = arg1[0];
- if (mmin_char == '-')
- mmin_mins = -mmin_mins;
-#endif
-#if ENABLE_FEATURE_FIND_XDEV
- } else if (strcmp(arg, "-xdev") == 0) {
- struct stat stbuf;
-
- xdev_count = (firstopt - 1) ? (firstopt - 1) : 1;
- xdev_dev = xmalloc(xdev_count * sizeof(dev_t));
-
- if (firstopt == 1) {
- xstat(".", &stbuf);
- xdev_dev[0] = stbuf.st_dev;
- } else {
- for (j = 1; j < firstopt; i++) {
- xstat(argv[j], &stbuf);
- xdev_dev[j-1] = stbuf.st_dev;
- }
- }
+ ap = ALLOC_ACTION(mmin);
+ ap->mmin_mins = xatol(arg1);
+ ap->mmin_char = arg1[0];
+ if (ap->mmin_char == '-')
+ ap->mmin_mins = -ap->mmin_mins;
+ }
#endif
#if ENABLE_FEATURE_FIND_NEWER
- } else if (strcmp(arg, "-newer") == 0) {
+ else if (strcmp(arg, "-newer") == 0) {
+ action_newer *ap;
struct stat stat_newer;
if (++i == argc)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
xstat(arg1, &stat_newer);
- newer_mtime = stat_newer.st_mtime;
+ ap = ALLOC_ACTION(newer);
+ ap->newer_mtime = stat_newer.st_mtime;
+ }
#endif
#if ENABLE_FEATURE_FIND_INUM
- } else if (strcmp(arg, "-inum") == 0) {
+ else if (strcmp(arg, "-inum") == 0) {
+ action_inum *ap;
if (++i == argc)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
- inode_num = xatoul(arg1);
+ ap = ALLOC_ACTION(inum);
+ ap->inode_num = xatoul(arg1);
+ }
#endif
#if ENABLE_FEATURE_FIND_EXEC
- } else if (strcmp(arg, "-exec") == 0) {
+ else if (strcmp(arg, "-exec") == 0) {
+ action_exec *ap;
+ need_default = 0;
+ ap = ALLOC_ACTION(exec);
i++; /* now: argv[i] is the first arg after -exec */
- exec_argv = &argv[i];
- exec_argc = i;
+ ap->exec_argv = &argv[i];
+ ap->exec_argc = i;
while (1) {
if (i == argc) /* did not see ';' till end */
bb_error_msg_and_die(bb_msg_requires_arg, arg);
@@ -350,23 +438,22 @@ int find_main(int argc, char **argv)
break;
i++;
}
- exec_argc = i - exec_argc; /* number of --exec arguments */
- if (exec_argc == 0)
+ ap->exec_argc = i - ap->exec_argc; /* number of --exec arguments */
+ if (ap->exec_argc == 0)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
- subst_count = xmalloc(exec_argc * sizeof(int));
- j = exec_argc;
+ ap->subst_count = xmalloc(ap->exec_argc * sizeof(int));
+ j = ap->exec_argc;
while (j--)
- subst_count[j] = count_subst(exec_argv[j]);
+ ap->subst_count[j] = count_subst(ap->exec_argv[j]);
+ }
#endif
- } else
+ else
bb_show_usage();
}
- if (firstopt == 1) {
- static const char *const dot[] = { ".", NULL };
- firstopt++;
- argv = (char**)dot - 1;
- }
+ if (need_default)
+ (void) ALLOC_ACTION(print);
+
for (i = 1; i < firstopt; i++) {
if (!recursive_action(argv[i],
TRUE, // recurse
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 18:07:09 +0000