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| author | Sami Kerola | 2016-05-14 20:50:41 +0200 |
|---|---|---|
| committer | Sami Kerola | 2016-07-04 00:35:10 +0200 |
| commit | 285c1f3a3eda762897d45f698e94c461d68e8d68 (patch) | |
| tree | e2b99cdb523a2f4341e68da397310925df91f402 /term-utils/write.c | |
| parent | write: stop removing and adding /dev/ in front of tty string (diff) | |
| download | kernel-qcow2-util-linux-285c1f3a3eda762897d45f698e94c461d68e8d68.tar.gz kernel-qcow2-util-linux-285c1f3a3eda762897d45f698e94c461d68e8d68.tar.xz kernel-qcow2-util-linux-285c1f3a3eda762897d45f698e94c461d68e8d68.zip | |
lib: try to find tty in get_terminal_name()
Try all standard terminal input/output file descriptors when finding tty
name in get_germinal_name(). This should make all invocations of the
function as robust as they can get.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Diffstat (limited to 'term-utils/write.c')
| -rw-r--r-- | term-utils/write.c | 16 |
1 files changed, 3 insertions, 13 deletions
diff --git a/term-utils/write.c b/term-utils/write.c index be91218cf..6bd393441 100644 --- a/term-utils/write.c +++ b/term-utils/write.c @@ -296,7 +296,7 @@ static void do_write(const struct write_control *ctl) int main(int argc, char **argv) { - int tty_writeable = 0, src_fd, c; + int tty_writeable = 0, c; struct write_control ctl = { 0 }; static const struct option longopts[] = { @@ -321,18 +321,8 @@ int main(int argc, char **argv) usage(stderr); } - /* check that sender has write enabled */ - if (isatty(STDIN_FILENO)) - src_fd = STDIN_FILENO; - else if (isatty(STDOUT_FILENO)) - src_fd = STDOUT_FILENO; - else if (isatty(STDERR_FILENO)) - src_fd = STDERR_FILENO; - else - src_fd = -1; - - if (src_fd != -1 && - get_terminal_name(src_fd, &ctl.src_tty_path, &ctl.src_tty_name, NULL) == 0) { + if (get_terminal_name(&ctl.src_tty_path, &ctl.src_tty_name, NULL) == 0) { + /* check that sender has write enabled */ if (check_tty(ctl.src_tty_path, &tty_writeable, NULL, 1)) exit(EXIT_FAILURE); if (!tty_writeable) |