crontab: do not destroy STDIN_FILENO, editor may need it (crontab -e)
vi: deal with EOF/error on stdin and with input NULs
function old new delta
crontab_main 623 642 +19
edit_file 901 906 +5
readit 331 318 -13
diff --git a/editors/vi.c b/editors/vi.c
index 27f2a3a..02bdbb3 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -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