diff options
Diffstat (limited to 'util-linux/script.c')
| -rw-r--r-- | util-linux/script.c | 35 |
1 files changed, 16 insertions, 19 deletions
diff --git a/util-linux/script.c b/util-linux/script.c index 5d6f4d9..63d3039 100644 --- a/util-linux/script.c +++ b/util-linux/script.c @@ -99,13 +99,12 @@ int script_main(int argc ATTRIBUTE_UNUSED, char **argv) /* parent */ #define buf bb_common_bufsiz1 struct pollfd pfd[2]; - struct pollfd *ppfd = pfd; int outfd, count, loop; outfd = xopen(fname, mode); - pfd[0].fd = 0; + pfd[0].fd = pty; pfd[0].events = POLLIN; - pfd[1].fd = pty; + pfd[1].fd = 0; pfd[1].events = POLLIN; ndelay_on(pty); /* this descriptor is not shared, can do this */ /* ndelay_on(0); - NO, stdin can be shared! Pity :( */ @@ -115,29 +114,17 @@ int script_main(int argc ATTRIBUTE_UNUSED, char **argv) /* TODO: don't use full_write's, use proper write buffering */ while (fd_count) { /* not safe_poll! we want SIGCHLD to EINTR poll */ - if (poll(ppfd, fd_count, -1) < 0 && errno != EINTR) { + if (poll(pfd, fd_count, -1) < 0 && errno != EINTR) { /* If child exits too quickly, we may get EIO: * for example, try "script -c true" */ break; } if (pfd[0].revents) { - count = safe_read(0, buf, sizeof(buf)); - if (count <= 0) { - /* err/eof: don't read anymore */ - pfd[0].revents = 0; - ppfd++; - fd_count--; - } else { - full_write(pty, buf, count); - } - } - if (pfd[1].revents) { errno = 0; count = safe_read(pty, buf, sizeof(buf)); if (count <= 0 && errno != EAGAIN) { - /* err/eof: don't read anymore */ - pfd[1].revents = 0; - fd_count--; + /* err/eof from pty: exit */ + goto restore; } if (count > 0) { full_write(1, buf, count); @@ -147,6 +134,16 @@ int script_main(int argc ATTRIBUTE_UNUSED, char **argv) } } } + if (pfd[1].revents) { + count = safe_read(0, buf, sizeof(buf)); + if (count <= 0) { + /* err/eof from stdin: don't read stdin anymore */ + pfd[1].revents = 0; + fd_count--; + } else { + full_write(pty, buf, count); + } + } } /* If loop was exited because SIGCHLD handler set fd_count to 0, * there still can be some buffered output. But not loop forever: @@ -161,7 +158,7 @@ int script_main(int argc ATTRIBUTE_UNUSED, char **argv) full_write(1, buf, count); full_write(outfd, buf, count); } - + restore: if (attr_ok == 0) tcsetattr(0, TCSAFLUSH, &tt); if (!(opt & 8)) /* not -q */ |