cryptpw: new applet (a bit less than 3k added)

(by Thomas Lundquist <lists@zelow.no>)

include/applets.h

@@ -101,6 +101,7 @@ USE_CP(APPLET_NOEXEC(cp, cp, _BB_DIR_BIN, _BB_SUID_NEVER, cp))
 USE_CPIO(APPLET(cpio, _BB_DIR_BIN, _BB_SUID_NEVER))
 USE_CROND(APPLET(crond, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
 USE_CRONTAB(APPLET(crontab, _BB_DIR_USR_BIN, _BB_SUID_ALWAYS))
+USE_CRYPTPW(APPLET(cryptpw, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_CUT(APPLET_NOEXEC(cut, cut, _BB_DIR_USR_BIN, _BB_SUID_NEVER, cut))
 USE_DATE(APPLET(date, _BB_DIR_BIN, _BB_SUID_NEVER))
 USE_DC(APPLET(dc, _BB_DIR_USR_BIN, _BB_SUID_NEVER))

include/libbb.h

@@ -718,6 +718,7 @@ extern int bb_parse_mode(const char* s, mode_t* theMode);
 
 char *concat_path_file(const char *path, const char *filename);
 char *concat_subpath_file(const char *path, const char *filename);
+/* NB: can violate const-ness (similarly to strchr) */
 char *last_char_is(const char *s, int c);
 
 
@@ -755,6 +756,7 @@ extern int index_in_substr_array(const char * const string_array[], const char *
 extern void print_login_issue(const char *issue_file, const char *tty);
 extern void print_login_prompt(void);
 
+extern void crypt_make_salt(char *p, int cnt);
 
 int get_terminal_width_height(const int fd, int *width, int *height);
 

include/usage.h

@@ -474,6 +474,13 @@
        "	-d [user]    delete crontab for user\n" \
        "	-c dir       specify crontab directory"
 
+#define cryptpw_trivial_usage \
+       "[-a des|md5] [string]"
+#define cryptpw_full_usage \
+       "Outputs crypted string.\n" \
+       "If string isn't supplied on cmdline, reads it from stdin.\n" \
+       "\nOptions:" \
+       "\n	-a	Algorithm to use (default: md5)"
 
 #define cut_trivial_usage \
        "[OPTION]... [FILE]..."