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File busybox-1.12.0-crontab_vi.patch of Package busybox (Revision 23)
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23
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--- busybox-1.12.0/editors/vi.c Wed Aug 6 00:56:11 2008 +++ busybox-1.12.0-crontab_vi/editors/vi.c Sun Sep 21 17:30:47 2008 @@ -147,10 +147,10 @@ #endif smallint editing; // >0 while we are editing a file - // [code audit says "can be 0 or 1 only"] + // [code audit says "can be 0, 1 or 2 only"] smallint cmd_mode; // 0=command 1=insert 2=replace int file_modified; // buffer contents changed (counter, not flag!) - int last_file_modified; // = -1; + int last_file_modified; // = -1; int fn_start; // index of first cmd line file name int save_argc; // how many file names on cmd line int cmdcnt; // repetition count @@ -623,7 +623,7 @@ // These are commands that change text[]. // Remember the input for the "." command if (!adding2q && ioq_start == NULL - && strchr(modifying_cmds, c) + && c != '\0' && strchr(modifying_cmds, c) ) { start_new_cmd_q(c); } @@ -645,8 +645,8 @@ } //------------------------------------------------------------------- - place_cursor(rows, 0, FALSE); // go to bottom of screen - clear_to_eol(); // Erase to end of line + place_cursor(rows - 1, 0, FALSE); // go to bottom of screen + clear_to_eol(); // erase to end of line cookmode(); #undef cur_line } @@ -2009,9 +2009,9 @@ { // get buffer for new cmd // if there is a current cmd count put it in the buffer first - if (cmdcnt > 0) + if (cmdcnt > 0) { lmc_len = sprintf(last_modifying_cmd, "%d%c", cmdcnt, c); - else { // just save char c onto queue + } else { // just save char c onto queue last_modifying_cmd[0] = c; lmc_len = 1; } @@ -2157,21 +2157,21 @@ //----- Come here when we get a continue signal ------------------- static void cont_sig(int sig UNUSED_PARAM) { - rawmode(); // terminal to "raw" - last_status_cksum = 0; // force status update - redraw(TRUE); // re-draw the screen + rawmode(); // terminal to "raw" + last_status_cksum = 0; // force status update + redraw(TRUE); // re-draw the screen signal(SIGTSTP, suspend_sig); signal(SIGCONT, SIG_DFL); - kill(my_pid, SIGCONT); + kill(my_pid, SIGCONT); // huh? why? we are already "continued"... } //----- Come here when we get a Suspend signal ------------------- static void suspend_sig(int sig UNUSED_PARAM) { - place_cursor(rows - 1, 0, FALSE); // go to bottom of screen - clear_to_eol(); // Erase to end of line - cookmode(); // terminal to "cooked" + place_cursor(rows - 1, 0, FALSE); // go to bottom of screen + clear_to_eol(); // erase to end of line + cookmode(); // terminal to "cooked" signal(SIGCONT, cont_sig); signal(SIGTSTP, SIG_DFL); @@ -2247,18 +2247,20 @@ fflush(stdout); n = chars_to_parse; - // get input from User- are there already input chars in Q? + // get input from User - are there already input chars in Q? if (n <= 0) { // the Q is empty, wait for a typed char + again: n = safe_read(STDIN_FILENO, readbuffer, sizeof(readbuffer)); - if (n < 0) { - if (errno == EBADF || errno == EFAULT || errno == EINVAL - || errno == EIO) - editing = 0; // want to exit - errno = 0; + if (n <= 0) { + place_cursor(rows - 1, 0, FALSE); // go to bottom of screen + clear_to_eol(); // erase to end of line + cookmode(); // terminal to "cooked" + bb_error_msg_and_die("can't read user input"); } - if (n <= 0) - return 0; // error + /* elsewhere we can get very confused by NULs */ + if (readbuffer[0] == '\0') + goto again; if (readbuffer[0] == 27) { // This is an ESC char. Is this Esc sequence? // Could be bare Esc key. See if there are any --- busybox-1.12.0/miscutils/crontab.c Wed Aug 6 00:56:08 2008 +++ busybox-1.12.0-crontab_vi/miscutils/crontab.c Sun Sep 21 17:30:47 2008 @@ -93,6 +93,7 @@ char *new_fname; char *user_name; /* -u USER */ int fd; + int src_fd; int opt_ler; /* file [opts] Replace crontab from file @@ -144,15 +145,15 @@ bb_show_usage(); /* Read replacement file under user's UID/GID/group vector */ + src_fd = STDIN_FILENO; if (!opt_ler) { /* Replace? */ if (!argv[0]) bb_show_usage(); if (NOT_LONE_DASH(argv[0])) { - fd = open_as_user(pas, argv[0]); - if (fd < 0) + src_fd = open_as_user(pas, argv[0]); + if (src_fd < 0) bb_error_msg_and_die("user %s cannot read %s", pas->pw_name, argv[0]); - xmove_fd(fd, STDIN_FILENO); } } @@ -180,23 +181,23 @@ tmp_fname = xasprintf("%s.%u", crontab_dir, (unsigned)getpid()); /* No O_EXCL: we don't want to be stuck if earlier crontabs * were killed, leaving stale temp file behind */ - fd = xopen3(tmp_fname, O_RDWR|O_CREAT|O_TRUNC, 0600); - xmove_fd(fd, STDIN_FILENO); - fchown(STDIN_FILENO, pas->pw_uid, pas->pw_gid); + src_fd = xopen3(tmp_fname, O_RDWR|O_CREAT|O_TRUNC, 0600); + fchown(src_fd, pas->pw_uid, pas->pw_gid); fd = open(pas->pw_name, O_RDONLY); if (fd >= 0) { - bb_copyfd_eof(fd, STDIN_FILENO); + bb_copyfd_eof(fd, src_fd); close(fd); + xlseek(src_fd, 0, SEEK_SET); } + close_on_exec_on(src_fd); /* don't want editor to see this fd */ edit_file(pas, tmp_fname); - xlseek(STDIN_FILENO, 0, SEEK_SET); /* fall through */ case 0: /* Replace (no -l, -e, or -r were given) */ new_fname = xasprintf("%s.new", pas->pw_name); fd = open(new_fname, O_WRONLY|O_CREAT|O_TRUNC|O_APPEND, 0600); if (fd >= 0) { - bb_copyfd_eof(STDIN_FILENO, fd); + bb_copyfd_eof(src_fd, fd); close(fd); xrename(new_fname, pas->pw_name); } else {
