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| author | Denys Vlasenko | 2018-08-05 17:07:26 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2018-08-05 18:11:15 +0200 |
| commit | 1c5eb88cd84c90e4c3d014f4abc8f8310c008842 (patch) | |
| tree | 50cff50b137d834599d2e9690ebf4802c5a87cf1 /shell | |
| parent | 58eb805c2c453c6764acbd65f5604465438d9272 (diff) | |
| download | busybox-1c5eb88cd84c90e4c3d014f4abc8f8310c008842.zip busybox-1c5eb88cd84c90e4c3d014f4abc8f8310c008842.tar.gz | |
ash: eval: Restore input files in evalcommand
Upstream commit:
Date: Tue, 27 Mar 2018 00:39:35 +0800
eval: Restore input files in evalcommand
When evalcommand invokes a command that modifies parsefile and
then bails out without popping the file, we need to ensure the
input file is restored so that the shell can continue to execute.
Reported-by: Martijn Dekker <martijn@inlv.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
function old new delta
unwindfiles - 20 +20
evalcommand 1635 1653 +18
getoptscmd 584 595 +11
popallfiles 20 10 -10
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/1 up/down: 49/-10) Total: 39 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell')
| -rw-r--r-- | shell/ash.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/shell/ash.c b/shell/ash.c index b596833..79ade5d 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -9942,6 +9942,7 @@ find_builtin(const char *name) /* * Execute a simple command. */ +static void unwindfiles(struct parsefile *stop); static int isassignment(const char *p) { @@ -9964,6 +9965,7 @@ evalcommand(union node *cmd, int flags) "\0\0", bltincmd /* why three NULs? */ }; struct localvar_list *localvar_stop; + struct parsefile *file_stop; struct redirtab *redir_stop; struct stackmark smark; union node *argp; @@ -9989,6 +9991,7 @@ evalcommand(union node *cmd, int flags) TRACE(("evalcommand(0x%lx, %d) called\n", (long)cmd, flags)); setstackmark(&smark); localvar_stop = pushlocalvars(); + file_stop = g_parsefile; back_exitstatus = 0; cmdentry.cmdtype = CMDBUILTIN; @@ -10260,6 +10263,7 @@ evalcommand(union node *cmd, int flags) if (cmd->ncmd.redirect) popredir(/*drop:*/ cmd_is_exec); unwindredir(redir_stop); + unwindfiles(file_stop); unwindlocalvars(localvar_stop); if (lastarg) { /* dsl: I think this is intended to be used to support @@ -10782,14 +10786,20 @@ popfile(void) INT_ON; } +static void +unwindfiles(struct parsefile *stop) +{ + while (g_parsefile != stop) + popfile(); +} + /* * Return to top level. */ static void popallfiles(void) { - while (g_parsefile != &basepf) - popfile(); + unwindfiles(&basepf); } /* |