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perl/perl-5.30.0-perl-134221-support-append-mode-for-open-.-undef.patch
Petr Písař 8b21adb20c Preserve append mode when opening anonymous files
2019-07-17 14:44:08 +02:00

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From 8e9cf86aa69cb79c91edf5ff0586f87bfe4c91bd Mon Sep 17 00:00:00 2001
From: Tony Cook <tony@develop-help.com>
Date: Tue, 2 Jul 2019 14:16:35 +1000
Subject: [PATCH] (perl #134221) support append mode for open .. undef
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Petr Písař: Ported to 5.30.0 from
45b29440d38be155c5177c8d6f9a5d4e7c2c098c.
Signed-off-by: Petr Písař <ppisar@redhat.com>
---
doio.c | 15 +++++++++++++++
embed.fnc | 1 +
perlio.c | 26 +++++++++++++++++++++-----
perlio.h | 3 +++
proto.h | 5 +++++
t/io/perlio_open.t | 14 ++++++++++++--
6 files changed, 57 insertions(+), 7 deletions(-)
diff --git a/doio.c b/doio.c
index 05a0696..424e0e3 100644
--- a/doio.c
+++ b/doio.c
@@ -265,6 +265,21 @@ Perl_my_mkstemp_cloexec(char *templte)
#endif
}
+int
+Perl_my_mkostemp_cloexec(char *templte, int flags)
+{
+ dVAR;
+ PERL_ARGS_ASSERT_MY_MKOSTEMP_CLOEXEC;
+#if defined(O_CLOEXEC)
+ DO_ONEOPEN_EXPERIMENTING_CLOEXEC(
+ PL_strategy_mkstemp,
+ Perl_my_mkostemp(templte, flags | O_CLOEXEC),
+ Perl_my_mkostemp(templte, flags));
+#else
+ DO_ONEOPEN_THEN_CLOEXEC(Perl_my_mkostemp(templte, flags));
+#endif
+}
+
#ifdef HAS_PIPE
int
Perl_PerlProc_pipe_cloexec(pTHX_ int *pipefd)
diff --git a/embed.fnc b/embed.fnc
index 259affd..c977d39 100644
--- a/embed.fnc
+++ b/embed.fnc
@@ -476,6 +476,7 @@ p |int |PerlLIO_dup2_cloexec|int oldfd|int newfd
pR |int |PerlLIO_open_cloexec|NN const char *file|int flag
pR |int |PerlLIO_open3_cloexec|NN const char *file|int flag|int perm
pnoR |int |my_mkstemp_cloexec|NN char *templte
+pnoR |int |my_mkostemp_cloexec|NN char *templte|int flags
#ifdef HAS_PIPE
pR |int |PerlProc_pipe_cloexec|NN int *pipefd
#endif
diff --git a/perlio.c b/perlio.c
index 904d47a..5a0cd36 100644
--- a/perlio.c
+++ b/perlio.c
@@ -1490,7 +1490,9 @@ PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
int imode, int perm, PerlIO *f, int narg, SV **args)
{
if (!f && narg == 1 && *args == &PL_sv_undef) {
- if ((f = PerlIO_tmpfile())) {
+ int imode = PerlIOUnix_oflags(mode);
+
+ if (imode != -1 && (f = PerlIO_tmpfile_flags(imode))) {
if (!layers || !*layers)
layers = Perl_PerlIO_context_layers(aTHX_ mode);
if (layers && *layers)
@@ -5048,6 +5050,15 @@ PerlIO_stdoutf(const char *fmt, ...)
#undef PerlIO_tmpfile
PerlIO *
PerlIO_tmpfile(void)
+{
+ return PerlIO_tmpfile_flags(0);
+}
+
+#define MKOSTEMP_MODES ( O_RDWR | O_CREAT | O_EXCL )
+#define MKOSTEMP_MODE_MASK ( O_ACCMODE | O_CREAT | O_EXCL | O_TRUNC )
+
+PerlIO *
+PerlIO_tmpfile_flags(int imode)
{
#ifndef WIN32
dTHX;
@@ -5063,27 +5074,32 @@ PerlIO_tmpfile(void)
const char * const tmpdir = TAINTING_get ? NULL : PerlEnv_getenv("TMPDIR");
SV * sv = NULL;
int old_umask = umask(0177);
+ imode &= ~MKOSTEMP_MODE_MASK;
if (tmpdir && *tmpdir) {
/* if TMPDIR is set and not empty, we try that first */
sv = newSVpv(tmpdir, 0);
sv_catpv(sv, tempname + 4);
- fd = Perl_my_mkstemp_cloexec(SvPVX(sv));
+ fd = Perl_my_mkostemp_cloexec(SvPVX(sv), imode);
}
if (fd < 0) {
SvREFCNT_dec(sv);
sv = NULL;
/* else we try /tmp */
- fd = Perl_my_mkstemp_cloexec(tempname);
+ fd = Perl_my_mkostemp_cloexec(tempname, imode);
}
if (fd < 0) {
/* Try cwd */
sv = newSVpvs(".");
sv_catpv(sv, tempname + 4);
- fd = Perl_my_mkstemp_cloexec(SvPVX(sv));
+ fd = Perl_my_mkostemp_cloexec(SvPVX(sv), imode);
}
umask(old_umask);
if (fd >= 0) {
- f = PerlIO_fdopen(fd, "w+");
+ /* fdopen() with a numeric mode */
+ char mode[8];
+ int writing = 1;
+ (void)PerlIO_intmode2str(imode | MKOSTEMP_MODES, mode, &writing);
+ f = PerlIO_fdopen(fd, mode);
if (f)
PerlIOBase(f)->flags |= PERLIO_F_TEMP;
PerlLIO_unlink(sv ? SvPVX_const(sv) : tempname);
diff --git a/perlio.h b/perlio.h
index d515020..ee16ab8 100644
--- a/perlio.h
+++ b/perlio.h
@@ -286,6 +286,9 @@ PERL_CALLCONV SSize_t PerlIO_get_bufsiz(PerlIO *);
#ifndef PerlIO_tmpfile
PERL_CALLCONV PerlIO *PerlIO_tmpfile(void);
#endif
+#ifndef PerlIO_tmpfile_flags
+PERL_CALLCONV PerlIO *PerlIO_tmpfile_flags(int flags);
+#endif
#ifndef PerlIO_stdin
PERL_CALLCONV PerlIO *PerlIO_stdin(void);
#endif
diff --git a/proto.h b/proto.h
index 74a8e46..e0ea55b 100644
--- a/proto.h
+++ b/proto.h
@@ -2270,6 +2270,11 @@ PERL_CALLCONV Pid_t Perl_my_fork(void);
PERL_CALLCONV I32 Perl_my_lstat(pTHX);
#endif
PERL_CALLCONV I32 Perl_my_lstat_flags(pTHX_ const U32 flags);
+PERL_CALLCONV int Perl_my_mkostemp_cloexec(char *templte, int flags)
+ __attribute__warn_unused_result__;
+#define PERL_ARGS_ASSERT_MY_MKOSTEMP_CLOEXEC \
+ assert(templte)
+
PERL_CALLCONV int Perl_my_mkstemp_cloexec(char *templte)
__attribute__warn_unused_result__;
#define PERL_ARGS_ASSERT_MY_MKSTEMP_CLOEXEC \
diff --git a/t/io/perlio_open.t b/t/io/perlio_open.t
index 99d7e51..56c354b 100644
--- a/t/io/perlio_open.t
+++ b/t/io/perlio_open.t
@@ -11,7 +11,7 @@ BEGIN {
use strict;
use warnings;
-plan tests => 6;
+plan tests => 10;
use Fcntl qw(:seek);
@@ -31,6 +31,16 @@ use Fcntl qw(:seek);
is($data, "the right read stuff", "found the right stuff");
}
-
+SKIP:
+{
+ ok((open my $fh, "+>>", undef), "open my \$fh, '+>>', undef")
+ or skip "can't open temp for append: $!", 3;
+ print $fh "abc";
+ ok(seek($fh, 0, SEEK_SET), "seek to zero");
+ print $fh "xyz";
+ ok(seek($fh, 0, SEEK_SET), "seek to zero again");
+ my $data = <$fh>;
+ is($data, "abcxyz", "check the second write appended");
+}
--
2.20.1
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