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| author | Denys Vlasenko | 2017-08-02 16:37:39 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2017-08-02 16:37:39 +0200 |
| commit | 7c40ddd9500907925041131374cb43eb87ef5494 (patch) | |
| tree | 415676f7439a3c42e2137f357c8e8904a93007cc /coreutils | |
| parent | 95f7953f2c46c7b9c799250aa8dc6eb10cc5c726 (diff) | |
| download | busybox-7c40ddd9500907925041131374cb43eb87ef5494.zip busybox-7c40ddd9500907925041131374cb43eb87ef5494.tar.gz | |
NOFORK fixes
"rm -i FILE" and "yes" can now be interrupted by ^C in hush.
This also now works:
$ usleep 19999999
^C
$ echo $?
130
function old new delta
run_pipe 1668 1711 +43
pseudo_exec_argv 312 321 +9
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 52/0) Total: 52 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'coreutils')
| -rw-r--r-- | coreutils/rm.c | 5 | ||||
| -rw-r--r-- | coreutils/seq.c | 5 | ||||
| -rw-r--r-- | coreutils/usleep.c | 7 | ||||
| -rw-r--r-- | coreutils/yes.c | 3 |
4 files changed, 15 insertions, 5 deletions
diff --git a/coreutils/rm.c b/coreutils/rm.c index f91c945..5e4acab 100644 --- a/coreutils/rm.c +++ b/coreutils/rm.c @@ -16,7 +16,8 @@ //config: help //config: rm is used to remove files or directories. -//applet:IF_RM(APPLET_NOFORK(rm, rm, BB_DIR_BIN, BB_SUID_DROP, rm)) +//applet:IF_RM(APPLET_NOEXEC(rm, rm, BB_DIR_BIN, BB_SUID_DROP, rm)) +/* was NOFORK, but then "rm -i FILE" can't be ^C'ed if run by hush */ //kbuild:lib-$(CONFIG_RM) += rm.o @@ -36,7 +37,7 @@ #include "libbb.h" -/* This is a NOFORK applet. Be very careful! */ +/* This is a NOEXEC applet. Be very careful! */ int rm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int rm_main(int argc UNUSED_PARAM, char **argv) diff --git a/coreutils/seq.c b/coreutils/seq.c index f36dbb4..c26ff06 100644 --- a/coreutils/seq.c +++ b/coreutils/seq.c @@ -12,7 +12,8 @@ //config: help //config: print a sequence of numbers -//applet:IF_SEQ(APPLET_NOFORK(seq, seq, BB_DIR_USR_BIN, BB_SUID_DROP, seq)) +//applet:IF_SEQ(APPLET_NOEXEC(seq, seq, BB_DIR_USR_BIN, BB_SUID_DROP, seq)) +/* was NOFORK, but then "seq 1 999999999" can't be ^C'ed if run by hush */ //kbuild:lib-$(CONFIG_SEQ) += seq.o @@ -26,7 +27,7 @@ #include "libbb.h" -/* This is a NOFORK applet. Be very careful! */ +/* This is a NOEXEC applet. Be very careful! */ int seq_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int seq_main(int argc, char **argv) diff --git a/coreutils/usleep.c b/coreutils/usleep.c index 7c25aad..684ab78 100644 --- a/coreutils/usleep.c +++ b/coreutils/usleep.c @@ -38,6 +38,13 @@ int usleep_main(int argc UNUSED_PARAM, char **argv) bb_show_usage(); } + /* Safe wrt NOFORK? (noforks are not allowed to run for + * a long time). Try "usleep 99999999" + ^C + "echo $?" + * in hush with FEATURE_SH_NOFORK=y. + * At least on uclibc, usleep() thanslates to nanosleep() + * which returns early on any signal (even caught one), + * and uclibc does not loop back on EINTR. + */ usleep(xatou(argv[1])); return EXIT_SUCCESS; diff --git a/coreutils/yes.c b/coreutils/yes.c index ea35d14..c244bfe 100644 --- a/coreutils/yes.c +++ b/coreutils/yes.c @@ -17,7 +17,8 @@ //config: yes is used to repeatedly output a specific string, or //config: the default string 'y'. -//applet:IF_YES(APPLET_NOFORK(yes, yes, BB_DIR_USR_BIN, BB_SUID_DROP, yes)) +//applet:IF_YES(APPLET_NOEXEC(yes, yes, BB_DIR_USR_BIN, BB_SUID_DROP, yes)) +/* was NOFORK, but then yes can't be ^C'ed if run by hush */ //kbuild:lib-$(CONFIG_YES) += yes.o |