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authorDenys Vlasenko2009-05-19 17:36:16 +0200
committerDenys Vlasenko2009-05-19 17:36:16 +0200
commit5e61115ea45c621867941e52e6ac016680415656 (patch)
tree7e92d0ee0720d907b4b35bfa510c3969c79eaaa8 /util-linux/script.c
parent5a49d284a6a9f6cf2076f23561f95aebdfd44592 (diff)
downloadbusybox-5e61115ea45c621867941e52e6ac016680415656.zip
busybox-5e61115ea45c621867941e52e6ac016680415656.tar.gz
scriptreplay: new applet. +423 bytes
Signed-off-by: Pascal Bellard <pascal.bellard@ads-lu.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'util-linux/script.c')
-rw-r--r--util-linux/script.c59
1 files changed, 39 insertions, 20 deletions
diff --git a/util-linux/script.c b/util-linux/script.c
index a9f24b1..d16a291 100644
--- a/util-linux/script.c
+++ b/util-linux/script.c
@@ -10,16 +10,8 @@
*
* Licensed under GPLv2 or later, see file License in this tarball for details.
*/
-
#include "libbb.h"
-static smallint fd_count = 2;
-
-static void handle_sigchld(int sig UNUSED_PARAM)
-{
- fd_count = 0;
-}
-
int script_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int script_main(int argc UNUSED_PARAM, char **argv)
{
@@ -36,6 +28,15 @@ int script_main(int argc UNUSED_PARAM, char **argv)
const char *shell;
char shell_opt[] = "-i";
char *shell_arg = NULL;
+ enum {
+ OPT_a = (1 << 0),
+ OPT_c = (1 << 1),
+ OPT_f = (1 << 2),
+ OPT_q = (1 << 3),
+#if ENABLE_SCRIPTREPLAY
+ OPT_t = (1 << 4),
+#endif
+ };
#if ENABLE_GETOPT_LONG
static const char getopt_longopts[] ALIGN1 =
@@ -43,25 +44,28 @@ int script_main(int argc UNUSED_PARAM, char **argv)
"command\0" Required_argument "c"
"flush\0" No_argument "f"
"quiet\0" No_argument "q"
+# if ENABLE_SCRIPTREPLAY
+ "timing\0" No_argument "t"
+# endif
;
applet_long_options = getopt_longopts;
#endif
opt_complementary = "?1"; /* max one arg */
- opt = getopt32(argv, "ac:fq", &shell_arg);
+ opt = getopt32(argv, "ac:fq" IF_SCRIPTREPLAY("t") , &shell_arg);
//argc -= optind;
argv += optind;
if (argv[0]) {
fname = argv[0];
}
mode = O_CREAT|O_TRUNC|O_WRONLY;
- if (opt & 1) {
+ if (opt & OPT_a) {
mode = O_CREAT|O_APPEND|O_WRONLY;
}
- if (opt & 2) {
+ if (opt & OPT_c) {
shell_opt[1] = 'c';
}
- if (!(opt & 8)) { /* not -q */
+ if (!(opt & OPT_q)) {
printf("Script started, file is %s\n", fname);
}
shell = getenv("SHELL");
@@ -83,7 +87,7 @@ int script_main(int argc UNUSED_PARAM, char **argv)
/* "script" from util-linux exits when child exits,
* we wouldn't wait for EOF from slave pty
* (output may be produced by grandchildren of child) */
- signal(SIGCHLD, handle_sigchld);
+ signal(SIGCHLD, record_signo);
/* TODO: SIGWINCH? pass window size changes down to slave? */
@@ -97,19 +101,23 @@ int script_main(int argc UNUSED_PARAM, char **argv)
#define buf bb_common_bufsiz1
struct pollfd pfd[2];
int outfd, count, loop;
+#if ENABLE_SCRIPTREPLAY
+ double oldtime = time(NULL);
+#endif
+ smallint fd_count = 2;
outfd = xopen(fname, mode);
pfd[0].fd = pty;
pfd[0].events = POLLIN;
- pfd[1].fd = 0;
+ pfd[1].fd = STDIN_FILENO;
pfd[1].events = POLLIN;
ndelay_on(pty); /* this descriptor is not shared, can do this */
- /* ndelay_on(0); - NO, stdin can be shared! Pity :( */
+ /* ndelay_on(STDIN_FILENO); - NO, stdin can be shared! Pity :( */
/* copy stdin to pty master input,
* copy pty master output to stdout and file */
/* TODO: don't use full_write's, use proper write buffering */
- while (fd_count) {
+ while (fd_count && !bb_got_signal) {
/* not safe_poll! we want SIGCHLD to EINTR poll */
if (poll(pfd, fd_count, -1) < 0 && errno != EINTR) {
/* If child exits too quickly, we may get EIO:
@@ -124,9 +132,20 @@ int script_main(int argc UNUSED_PARAM, char **argv)
goto restore;
}
if (count > 0) {
+#if ENABLE_SCRIPTREPLAY
+ if (opt & OPT_t) {
+ struct timeval tv;
+ double newtime;
+
+ gettimeofday(&tv, NULL);
+ newtime = tv.tv_sec + (double) tv.tv_usec / 1000000;
+ fprintf(stderr, "%f %u\n", newtime - oldtime, count);
+ oldtime = newtime;
+ }
+#endif
full_write(STDOUT_FILENO, buf, count);
full_write(outfd, buf, count);
- if (opt & 4) { /* -f */
+ if (opt & OPT_f) {
fsync(outfd);
}
}
@@ -142,8 +161,8 @@ int script_main(int argc UNUSED_PARAM, char **argv)
}
}
}
- /* If loop was exited because SIGCHLD handler set fd_count to 0,
- * there still can be some buffered output. But not loop forever:
+ /* If loop was exited because SIGCHLD handler set bb_got_signal,
+ * there still can be some buffered output. But dont loop forever:
* we won't pump orphaned grandchildren's output indefinitely.
* Testcase: running this in script:
* exec dd if=/dev/zero bs=1M count=1
@@ -158,7 +177,7 @@ int script_main(int argc UNUSED_PARAM, char **argv)
restore:
if (attr_ok == 0)
tcsetattr(0, TCSAFLUSH, &tt);
- if (!(opt & 8)) /* not -q */
+ if (!(opt & OPT_q))
printf("Script done, file is %s\n", fname);
return EXIT_SUCCESS;
}