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--- Libc/Libc-1725.40.4/stdio/FreeBSD/mktemp.c
+++ Libc/Libc-320/stdio/FreeBSD/mktemp.c
@@ -10,7 +10,11 @@
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
@@ -31,10 +35,10 @@
static char sccsid[] = "@(#)mktemp.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libc/stdio/mktemp.c,v 1.28 2003/02/16 17:29:10 nectar Exp $");
#include "namespace.h"
-#include <assert.h>
-#include <sys/param.h>
+#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
@@ -45,187 +49,99 @@
#include <unistd.h>
#include "un-namespace.h"
-#define ALLOWED_MKOSTEMP_FLAGS (O_APPEND | O_SHLOCK | O_EXLOCK | O_CLOEXEC)
-
char *_mktemp(char *);
-typedef enum {
- FTPP_DONE, FTPP_TRY_NEXT, FTPP_ERROR
-} find_temp_path_progress_t;
+static int _gettemp(char *, int *, int, int);
-/* A contract for actions that find_temp_path performs for every path from
- * the template.
- *
- * If the desired path was found, set result and return FTPP_DONE.
- * If an IO/FS error ocurred, set errno and return FTPP_ERROR.
- * Otherwise return FTPP_TRY_NEXT.
- */
-typedef find_temp_path_progress_t (*find_temp_path_action_t)(
- int dfd, char *path, void *ctx, void *result);
-
-static int find_temp_path(int dfd, char *path, int slen, bool stat_base_dir,
- find_temp_path_action_t action, void *action_ctx, void *action_result);
-
-static find_temp_path_progress_t _mkostemps_action(
- int dfd, char *path, void *ctx, void *result);
-static find_temp_path_progress_t _mktemp_action(
- int dfd, char *path, void *ctx, void *result);
-static find_temp_path_progress_t _mkdtemp_action(
- int dfd, char *path, void *ctx, void *result);
-static find_temp_path_progress_t _mkstemp_dprotected_np_action(
- int dfd, char *path, void *ctx, void *result);
-
-static const char padchar[] =
+static const unsigned char padchar[] =
"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
int
-mkostemps(char *path, int slen, int oflags)
+mkstemps(path, slen)
+ char *path;
+ int slen;
{
int fd;
- if (oflags & ~ALLOWED_MKOSTEMP_FLAGS) {
- errno = EINVAL;
- return -1;
- }
- return (find_temp_path(AT_FDCWD, path, slen, true, _mkostemps_action, &oflags, &fd) ? fd : -1);
+
+ return (_gettemp(path, &fd, 0, slen) ? fd : -1);
}
int
-mkostempsat_np(int dfd, char *path, int slen, int oflags)
-{
- int fd;
- if (oflags & ~ALLOWED_MKOSTEMP_FLAGS) {
- errno = EINVAL;
- return -1;
- }
- return (find_temp_path(dfd, path, slen, true, _mkostemps_action, &oflags, &fd) ? fd : -1);
-}
-
-int
-mkstemps(char *path, int slen)
+mkstemp(path)
+ char *path;
{
int fd;
- return (find_temp_path(AT_FDCWD, path, slen, true, _mkostemps_action, NULL, &fd) ? fd : -1);
-}
-
-int
-mkstempsat_np(int dfd, char *path, int slen)
-{
- int fd;
-
- return (find_temp_path(dfd, path, slen, true, _mkostemps_action, NULL, &fd) ? fd : -1);
-}
-
-int
-mkostemp(char *path, int oflags)
-{
- int fd;
- if (oflags & ~ALLOWED_MKOSTEMP_FLAGS) {
- errno = EINVAL;
- return -1;
- }
- return (find_temp_path(AT_FDCWD, path, 0, true, _mkostemps_action, &oflags, &fd) ? fd : -1);
-}
-
-int
-mkstemp(char *path)
-{
- int fd;
-
- return (find_temp_path(AT_FDCWD, path, 0, true, _mkostemps_action, NULL, &fd) ? fd : -1);
+ return (_gettemp(path, &fd, 0, 0) ? fd : -1);
}
char *
-mkdtemp(char *path)
+mkdtemp(path)
+ char *path;
{
- return (find_temp_path(AT_FDCWD, path, 0, true, _mkdtemp_action, NULL, NULL) ?
- path : (char *)NULL);
+ return (_gettemp(path, (int *)NULL, 1, 0) ? path : (char *)NULL);
}
char *
-mkdtempat_np(int dfd, char *path)
+_mktemp(path)
+ char *path;
{
- return (find_temp_path(dfd, path, 0, true, _mkdtemp_action, NULL, NULL) ?
- path : (char *)NULL);
-}
-
-char *
-_mktemp(char *path)
-{
- return (find_temp_path(AT_FDCWD, path, 0, false, _mktemp_action, NULL, NULL) ?
- path : (char *)NULL);
+ return (_gettemp(path, (int *)NULL, 0, 0) ? path : (char *)NULL);
}
__warn_references(mktemp,
"warning: mktemp() possibly used unsafely; consider using mkstemp()");
char *
-mktemp(char *path)
+mktemp(path)
+ char *path;
{
return (_mktemp(path));
}
-int
-mkstemp_dprotected_np(char *path, int class, int dpflags)
+static int
+_gettemp(path, doopen, domkdir, slen)
+ char *path;
+ int *doopen;
+ int domkdir;
+ int slen;
{
- int fd;
- int ctx[2] = { class, dpflags };
-
- return (find_temp_path(AT_FDCWD, path, 0, true, _mkstemp_dprotected_np_action, &ctx, &fd) ? fd : -1);
-}
-
-/* For every path matching a given template, invoke an action. Depending on
- * the progress reported by action, stops or tries the next path.
- * Returns 1 if succeeds, 0 and sets errno if fails.
- */
-static int
-find_temp_path(int dfd, char *path, int slen, bool stat_base_dir,
- find_temp_path_action_t action, void *action_ctx, void *action_result)
-{
- char *start, *trv, *suffp, *carryp;
+ char *start, *trv, *suffp;
char *pad;
struct stat sbuf;
int rval;
uint32_t rand;
- char carrybuf[MAXPATHLEN];
- if (slen < 0) {
+ if (doopen != NULL && domkdir) {
errno = EINVAL;
return (0);
}
for (trv = path; *trv != '\0'; ++trv)
;
- if (trv - path >= MAXPATHLEN) {
- errno = ENAMETOOLONG;
- return (0);
- }
trv -= slen;
suffp = trv;
--trv;
- if (trv < path || NULL != strchr(suffp, '/')) {
+ if (trv < path) {
errno = EINVAL;
return (0);
}
/* Fill space with random characters */
while (trv >= path && *trv == 'X') {
- rand = arc4random_uniform(sizeof(padchar) - 1);
+ rand = arc4random() % (sizeof(padchar) - 1);
*trv-- = padchar[rand];
}
start = trv + 1;
- /* save first combination of random characters */
- memcpy(carrybuf, start, suffp - start);
-
/*
* check the target directory.
*/
- if (stat_base_dir) {
+ if (doopen != NULL || domkdir) {
for (; trv > path; --trv) {
if (*trv == '/') {
*trv = '\0';
- rval = fstatat(dfd, path, &sbuf, 0);
+ rval = stat(path, &sbuf);
*trv = '/';
if (rval != 0)
return (0);
@@ -239,97 +155,32 @@
}
for (;;) {
- switch (action(dfd, path, action_ctx, action_result)) {
- case FTPP_DONE:
- return (1);
- case FTPP_ERROR:
- return (0); // errno must be set by the action
- default:
- ; // FTPP_TRY_NEXT, fall-through
- }
+ if (doopen) {
+ if ((*doopen =
+ _open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0)
+ return (1);
+ if (errno != EEXIST)
+ return (0);
+ } else if (domkdir) {
+ if (mkdir(path, 0700) == 0)
+ return (1);
+ if (errno != EEXIST)
+ return (0);
+ } else if (lstat(path, &sbuf))
+ return (errno == ENOENT);
/* If we have a collision, cycle through the space of filenames */
- for (trv = start, carryp = carrybuf;;) {
- /* have we tried all possible permutations? */
- if (trv == suffp) {
- /* yes - exit with EEXIST */
- errno = EEXIST;
+ for (trv = start;;) {
+ if (*trv == '\0' || trv == suffp)
return (0);
- }
pad = strchr(padchar, *trv);
- if (pad == NULL) {
- /* this should never happen */
- errno = EIO;
- return (0);
- }
- /* increment character */
- *trv = (*++pad == '\0') ? padchar[0] : *pad;
- /* carry to next position? */
- if (*trv == *carryp) {
- /* increment position and loop */
- ++trv;
- ++carryp;
- } else {
- /* try with new name */
+ if (pad == NULL || *++pad == '\0')
+ *trv++ = padchar[0];
+ else {
+ *trv++ = *pad;
break;
}
}
}
/*NOTREACHED*/
}
-
-static find_temp_path_progress_t
-_mkostemps_action(int dfd, char *path, void *ctx, void *result)
-{
- int oflags = (ctx != NULL) ? *((int *) ctx) : 0;
- int fd = openat(dfd, path, O_CREAT|O_EXCL|O_RDWR|oflags, 0600);
- if (fd >= 0) {
- *((int *) result) = fd;
- return FTPP_DONE;
- }
- return (errno == EEXIST) ?
- FTPP_TRY_NEXT :
- FTPP_ERROR; // errno is set already
-}
-
-static find_temp_path_progress_t
-_mktemp_action(int dfd, char *path, void *ctx __unused, void *result __unused)
-{
- struct stat sbuf;
- if (fstatat(dfd, path, &sbuf, AT_SYMLINK_NOFOLLOW)) {
- // stat failed
- return (errno == ENOENT) ?
- FTPP_DONE : // path is vacant, done
- FTPP_ERROR; // errno is set already
- }
- return FTPP_TRY_NEXT;
-}
-
-static find_temp_path_progress_t
-_mkdtemp_action(int dfd, char *path, void *ctx __unused, void *result __unused)
-{
- if (mkdirat(dfd, path, 0700) == 0)
- return FTPP_DONE;
- return (errno == EEXIST) ?
- FTPP_TRY_NEXT :
- FTPP_ERROR; // errno is set already
-}
-
-static find_temp_path_progress_t
-_mkstemp_dprotected_np_action(int dfd, char *path, void *ctx, void *result)
-{
- assert(dfd == AT_FDCWD);
-
- int class = ((int *) ctx)[0];
- int dpflags = ((int *) ctx)[1];
- int fd = open_dprotected_np(path, O_CREAT|O_EXCL|O_RDWR, class, dpflags, 0600);
- if (fd >= 0) {
- *((int *) result) = fd;
- return FTPP_DONE;
- }
- return (errno == EEXIST) ?
- FTPP_TRY_NEXT :
- FTPP_ERROR; // errno is set already
-}
-
-