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Bug#1088964: marked as done (libc6: system() shall return -1 if a child process cannot be created)

Your message dated Fri, 03 Jan 2025 11:21:55 +0000
with message-id <E1tTfkZ-003D1J-SL@fasolo.debian.org>
and subject line Bug#1088964: fixed in glibc 2.40-5
has caused the Debian Bug report #1088964,
regarding libc6: system() shall return -1 if a child process cannot be created
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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-- 
1088964: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1088964
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: libc6
Version: 2.36-9+deb12u9
Severity: normal

Dear Maintainer,

The system() library function gives the wrong result when a child
process cannot be created.

According to the man page system(3posix):
"If a child process cannot be created, [...], system() shall return -1 and
 set errno to indicate the error."

Actually (libc6 2.36), it returns 32512 instead of -1.

The following code can be used as a test case:

/*=== cut here ===*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/resource.h>

int main(void)
{
    int a = system("true");

    // force failure for the next call
    const struct rlimit zerorl = {0, 0};
    if (setrlimit(RLIMIT_NPROC, &zerorl) == -1)
        perror("setrlimit(RLIMIT_CORE)");

    int b = system("true");
    printf("> success:%d failure:%d (%#x)\n", a, b, b);
}
/*=== cut here ===*/

Returns:
> success:0 failure:32512 (0x7f00)

Expected result:
> success:0 failure:-1 (0xffffffff)

Regards,
Arnaud Giersch


-- System Information:
Debian Release: 12.8
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'stable-security'), (500, 'stable-debug'), (500, 'proposed-updates-debug'), (500, 'proposed-updates'), (500, 'stable'), (50, 'unstable'), (40, 'experimental'), (1, 'experimental-debug')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.1.0-27-amd64 (SMP w/8 CPU threads; PREEMPT)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages libc6 depends on:
ii  libgcc-s1  12.2.0-14

Versions of packages libc6 recommends:
ii  libidn2-0  2.3.3-1+b1

Versions of packages libc6 suggests:
ii  debconf [debconf-2.0]  1.5.82
ii  glibc-doc              2.36-9+deb12u9
ii  libc-l10n              2.36-9+deb12u9
ii  libnss-nis             3.1-4
ii  libnss-nisplus         1.3-4
ii  locales                2.36-9+deb12u9

-- debconf-show failed

--- End Message ---
--- Begin Message --- 
Source: glibc
Source-Version: 2.40-5
Done: Aurelien Jarno <aurel32@debian.org>

We believe that the bug you reported is fixed in the latest version of
glibc, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1088964@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Aurelien Jarno <aurel32@debian.org> (supplier of updated glibc package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

Format: 1.8
Date: Fri, 03 Jan 2025 11:56:38 +0100
Source: glibc
Architecture: source
Version: 2.40-5
Distribution: unstable
Urgency: medium
Maintainer: GNU Libc Maintainers <debian-glibc@lists.debian.org>
Changed-By: Aurelien Jarno <aurel32@debian.org>
Closes: 1087670 1088003 1088166 1088964 1091473 1091705
Changes:
 glibc (2.40-5) unstable; urgency=medium
 .
   [ Samuel Thibault ]
   * debian/patches/hurd-i386/git-MAP_NORESERVE.diff: Add MAP_NORESERVE flag.
   * debian/patches/hurd-i386/git-signal-reply-port.diff: Fix hurd build
     against gcc 14.
 .
   [ Bjarni Ingi Gislason ]
   * debian/local/manpages/update-locale.8: fix issues reported by troff.
     Closes: #1088003.
 .
   [ Aurelien Jarno ]
   * debian/patches/any/git-iconv-do-not-report-*.patch: backport iconv return
     code with transliteration fix from upstream.  Closes: #1087670.
   * debian/debhelper.in/locales.templates: add a note to clarify that the C,
     C.UTF-8 and POSIX locales do not need to be generated.  Closes: #1091473.
   * debian/patches/git-updates.diff: update from upstream stable branch.
   * patches/any/git-posix-fix-system-when-a-child-cannot-be-created-BZ-3.patch:
     backport patch from upstream to fix return value of system() when a child
     process cannot be created.  Closes: #1088964.
   * debian/rules.d/debhelper.mk: explicitly pass the library path to
     dh_shlibdeps for multilib packages, to fix a FTBFS with rebootstrap which
     does not install the g++-XX-multilib build-dependency.  Closes: #1088166.
 .
   [ Carles Pina i Estany ]
   * Update Catalan debconf translation.  Closes: #1091705.
Checksums-Sha1:
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 fe2c602b78f0bb88f3fd05f5f9ec061264491c5f 453708 glibc_2.40-5.debian.tar.xz
 fc175cddd87ff54ff439dff23e2e195facfd590a 11182 glibc_2.40-5_source.buildinfo
Checksums-Sha256:
 721e79c087b0b907e7e098a6b84d654891012a7aa2b7626bf73d2485d6976f49 7550 glibc_2.40-5.dsc
 05aa4df25ff502a1d8ab4902f800805daa3b86c986627b0fd6d44b5409878862 453708 glibc_2.40-5.debian.tar.xz
 fc54149d984c8c9461b80e7c112f8d6a8881c443a5350b3f395996a26e1eeb6b 11182 glibc_2.40-5_source.buildinfo
Files:
 fa5650ca4562760ee82bce10cd105510 7550 libs required glibc_2.40-5.dsc
 cc64bb13bfa93c6cbcd640a12408ada5 453708 libs required glibc_2.40-5.debian.tar.xz
 a4cb2f0d9e5c6aadcadd20ac69f2e08e 11182 libs required glibc_2.40-5_source.buildinfo

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--- End Message ---
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