Set the legacy process name with prctl() on assignment to $0 on Linux

[perl.git] / mg.c

diff --git a/mg.c b/mg.c
index 4a8d767..0341f6e 100644 (file)
--- a/mg.c
+++ b/mg.c
@@ -57,6 +57,10 @@ tie.
 #  include <sys/pstat.h>
 #endif
 
+#ifdef HAS_PRCTL_SET_NAME
+#  include <sys/prctl.h>
+#endif
+
 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
 Signal_t Perl_csighandler(int sig, siginfo_t *, void *);
 #else
@@ -2823,6 +2827,13 @@ Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
            PL_origargv[0][PL_origalen-1] = 0;
            for (i = 1; i < PL_origargc; i++)
                PL_origargv[i] = 0;
+#ifdef HAS_PRCTL_SET_NAME
+           /* Set the legacy process name in addition to the POSIX name on Linux */
+           if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) {
+               /* diag_listed_as: SKIPME */
+               Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno));
+           }
+#endif
        }
 #endif
        UNLOCK_DOLLARZERO_MUTEX;