diff options
Diffstat (limited to 'package/utils/busybox')
| -rw-r--r-- | package/utils/busybox/501-ash-hush-fix-SIGCHLD-interrupting-read-builtin.patch | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/package/utils/busybox/501-ash-hush-fix-SIGCHLD-interrupting-read-builtin.patch b/package/utils/busybox/501-ash-hush-fix-SIGCHLD-interrupting-read-builtin.patch new file mode 100644 index 0000000000..1386dad282 --- /dev/null +++ b/package/utils/busybox/501-ash-hush-fix-SIGCHLD-interrupting-read-builtin.patch @@ -0,0 +1,147 @@ +From f5470419404d643070db99d058405b714695b817 Mon Sep 17 00:00:00 2001 +From: Denys Vlasenko <vda.linux@googlemail.com> +Date: Mon, 22 May 2017 19:34:45 +0200 +Subject: [PATCH] ash,hush: fix SIGCHLD interrupting read builtin + +function old new delta +readcmd 169 217 +48 +shell_builtin_read 1087 1097 +10 +localcmd 366 364 -2 +builtin_read 197 193 -4 +------------------------------------------------------------------------------ +(add/remove: 0/0 grow/shrink: 2/2 up/down: 58/-6) Total: 52 bytes + +Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com> +Signed-off-by: Bastian Bittorf <bb@npl.de> +--- + shell/ash.c | 7 +++++++ + shell/ash_test/ash-read/read_SIGCHLD.right | 2 ++ + shell/ash_test/ash-read/read_SIGCHLD.tests | 4 ++++ + shell/hush.c | 5 ++++- + shell/hush_test/hush-read/read_SIGCHLD.right | 2 ++ + shell/hush_test/hush-read/read_SIGCHLD.tests | 4 ++++ + shell/shell_common.c | 20 +++++++++++--------- + 7 files changed, 34 insertions(+), 10 deletions(-) + create mode 100644 shell/ash_test/ash-read/read_SIGCHLD.right + create mode 100755 shell/ash_test/ash-read/read_SIGCHLD.tests + create mode 100644 shell/hush_test/hush-read/read_SIGCHLD.right + create mode 100755 shell/hush_test/hush-read/read_SIGCHLD.tests + +diff --git a/shell/ash.c b/shell/ash.c +index 70ee15e..60c8ffe 100644 +--- a/shell/ash.c ++++ b/shell/ash.c +@@ -13268,6 +13268,7 @@ readcmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) + /* "read -s" needs to save/restore termios, can't allow ^C + * to jump out of it. + */ ++ again: + INT_OFF; + r = shell_builtin_read(setvar0, + argptr, +@@ -13280,6 +13281,12 @@ readcmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) + ); + INT_ON; + ++ if ((uintptr_t)r == 1 && errno == EINTR) { ++ /* to get SIGCHLD: sleep 1 & read x; echo $x */ ++ if (pending_sig == 0) ++ goto again; ++ } ++ + if ((uintptr_t)r > 1) + ash_msg_and_raise_error(r); + +diff --git a/shell/ash_test/ash-read/read_SIGCHLD.right b/shell/ash_test/ash-read/read_SIGCHLD.right +new file mode 100644 +index 0000000..b3dc7ab +--- /dev/null ++++ b/shell/ash_test/ash-read/read_SIGCHLD.right +@@ -0,0 +1,2 @@ ++x='Ok' ++exitcode:0 +diff --git a/shell/ash_test/ash-read/read_SIGCHLD.tests b/shell/ash_test/ash-read/read_SIGCHLD.tests +new file mode 100755 +index 0000000..c5f673a +--- /dev/null ++++ b/shell/ash_test/ash-read/read_SIGCHLD.tests +@@ -0,0 +1,4 @@ ++x=BAD ++{ sleep 0.4; echo Ok; } | { sleep 0.2 & read x; echo "x='$x'"; } ++echo "exitcode:$?" ++ +diff --git a/shell/hush.c b/shell/hush.c +index e18920f..125463a 100644 +--- a/shell/hush.c ++++ b/shell/hush.c +@@ -9038,6 +9038,9 @@ static int FAST_FUNC builtin_type(char **argv) + * - terminates shell (regardless of interactivity); + * if it has non-empty trap: + * - executes trap and returns to read; ++ * SIGCHLD from children: ++ * - does not interrupt read regardless of interactivity: ++ * try: sleep 1 & read x; echo $x + */ + static int FAST_FUNC builtin_read(char **argv) + { +@@ -9071,7 +9074,7 @@ static int FAST_FUNC builtin_read(char **argv) + + if ((uintptr_t)r == 1 && errno == EINTR) { + unsigned sig = check_and_run_traps(); +- if (sig && sig != SIGINT) ++ if (sig != SIGINT) + goto again; + } + +diff --git a/shell/hush_test/hush-read/read_SIGCHLD.right b/shell/hush_test/hush-read/read_SIGCHLD.right +new file mode 100644 +index 0000000..b3dc7ab +--- /dev/null ++++ b/shell/hush_test/hush-read/read_SIGCHLD.right +@@ -0,0 +1,2 @@ ++x='Ok' ++exitcode:0 +diff --git a/shell/hush_test/hush-read/read_SIGCHLD.tests b/shell/hush_test/hush-read/read_SIGCHLD.tests +new file mode 100755 +index 0000000..c5f673a +--- /dev/null ++++ b/shell/hush_test/hush-read/read_SIGCHLD.tests +@@ -0,0 +1,4 @@ ++x=BAD ++{ sleep 0.4; echo Ok; } | { sleep 0.2 & read x; echo "x='$x'"; } ++echo "exitcode:$?" ++ +diff --git a/shell/shell_common.c b/shell/shell_common.c +index fb86e68..03b7d0b 100644 +--- a/shell/shell_common.c ++++ b/shell/shell_common.c +@@ -204,15 +204,17 @@ shell_builtin_read(void FAST_FUNC (*setvar)(const char *name, const char *val), + c = buffer[bufpos]; + if (c == '\0') + continue; +- if (backslash) { +- backslash = 0; +- if (c != '\n') +- goto put; +- continue; +- } +- if (!(read_flags & BUILTIN_READ_RAW) && c == '\\') { +- backslash = 1; +- continue; ++ if (!(read_flags & BUILTIN_READ_RAW)) { ++ if (backslash) { ++ backslash = 0; ++ if (c != '\n') ++ goto put; ++ continue; ++ } ++ if (c == '\\') { ++ backslash = 1; ++ continue; ++ } + } + if (c == '\n') + break; +-- +1.9.1 + |