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
