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util: do not reset terminal in acquire_terminal()

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Before, we'd always reset acquired terminals, which is not really
desired, as we expose a setting TTYReset= which is supposed to control
whether the TTY is reset or not. Previously that setting would only
enable a second resetting of the TTY, which is of course pointless...

Hence, move the implicit resetting out of acquire_terminal() and make
the callers do it if they need it.
This commit is contained in:
Lennart Poettering 2015-10-08 14:33:53 +02:00
parent 40e1f4ea74
commit 3d18b16755
3 changed files with 30 additions and 36 deletions
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8
src/basic/terminal-util.c
View File

@ -480,10 +480,6 @@ int acquire_terminal(
safe_close(notify);
r = reset_terminal_fd(fd, true);
if (r < 0)
log_warning_errno(r, "Failed to reset terminal: %m");
return fd;
fail:
@ -616,6 +612,10 @@ int make_console_stdio(void) {
if (fd < 0)
return log_error_errno(fd, "Failed to acquire terminal: %m");
r = reset_terminal_fd(fd, true);
if (r < 0)
log_warning_errno(r, "Failed to reset terminal, ignoring: %m");
r = make_stdio(fd);
if (r < 0)
return log_error_errno(r, "Failed to duplicate terminal fd: %m");

54
src/core/execute.c
View File

@ -543,9 +543,9 @@ static int chown_terminal(int fd, uid_t uid) {
return 0;
}
static int setup_confirm_stdio(int *_saved_stdin,
int *_saved_stdout) {
int fd = -1, saved_stdin, saved_stdout = -1, r;
static int setup_confirm_stdio(int *_saved_stdin, int *_saved_stdout) {
_cleanup_close_ int fd = -1, saved_stdin = -1, saved_stdout = -1;
int r;
assert(_saved_stdin);
assert(_saved_stdout);
@ -555,10 +555,8 @@ static int setup_confirm_stdio(int *_saved_stdin,
return -errno;
saved_stdout = fcntl(STDOUT_FILENO, F_DUPFD, 3);
if (saved_stdout < 0) {
r = errno;
goto fail;
}
if (saved_stdout < 0)
return -errno;
fd = acquire_terminal(
"/dev/console",
@ -566,39 +564,33 @@ static int setup_confirm_stdio(int *_saved_stdin,
false,
false,
DEFAULT_CONFIRM_USEC);
if (fd < 0) {
r = fd;
goto fail;
}
if (fd < 0)
return fd;
r = chown_terminal(fd, getuid());
if (r < 0)
goto fail;
return r;
if (dup2(fd, STDIN_FILENO) < 0) {
r = -errno;
goto fail;
}
r = reset_terminal_fd(fd, true);
if (r < 0)
return r;
if (dup2(fd, STDOUT_FILENO) < 0) {
r = -errno;
goto fail;
}
if (dup2(fd, STDIN_FILENO) < 0)
return -errno;
if (dup2(fd, STDOUT_FILENO) < 0)
return -errno;
if (fd >= 2)
safe_close(fd);
fd = -1;
*_saved_stdin = saved_stdin;
*_saved_stdout = saved_stdout;
saved_stdin = saved_stdout = -1;
return 0;
fail:
safe_close(saved_stdout);
safe_close(saved_stdin);
safe_close(fd);
return r;
}
_printf_(1, 2) static int write_confirm_message(const char *format, ...) {
@ -618,9 +610,7 @@ _printf_(1, 2) static int write_confirm_message(const char *format, ...) {
return 0;
}
static int restore_confirm_stdio(int *saved_stdin,
int *saved_stdout) {
static int restore_confirm_stdio(int *saved_stdin, int *saved_stdout) {
int r = 0;
assert(saved_stdin);
@ -636,8 +626,8 @@ static int restore_confirm_stdio(int *saved_stdin,
if (dup2(*saved_stdout, STDOUT_FILENO) < 0)
r = -errno;
safe_close(*saved_stdin);
safe_close(*saved_stdout);
*saved_stdin = safe_close(*saved_stdin);
*saved_stdout = safe_close(*saved_stdout);
return r;
}

4
src/tty-ask-password-agent/tty-ask-password-agent.c
View File

@ -315,6 +315,10 @@ static int parse_password(const char *filename, char **wall) {
tty_fd = acquire_terminal("/dev/console", false, false, false, USEC_INFINITY);
if (tty_fd < 0)
return log_error_errno(tty_fd, "Failed to acquire /dev/console: %m");
r = reset_terminal_fd(tty_fd, true);
if (r < 0)
log_warning_errno(r, "Failed to reset terminal, ignoring: %m");
}
r = ask_password_tty(message, NULL, not_after, echo ? ASK_PASSWORD_ECHO : 0, filename, &password);