pkill kills self when called from C program

[Ben Greear]

This does not happen on Fedora. Source code example pasted below.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: procps 1:3.3.9-1ubuntu2.2
Uname: Linux 3.16.0-031600-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.14.1-0ubuntu3.10
Architecture: amd64
Date: Tue Apr 21 17:13:07 2015
InstallationDate: Installed on 2014-09-22 (211 days ago)
InstallationMedia: Ubuntu-Server 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.3)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: procps
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.sysctl.conf: [modified]
mtime.conffile..etc.sysctl.conf: 2014-09-30T12:34:06.956063

[Ben Greear (greearb)]

I did some extra testing on this bug today.

I compiled and installed the latest procps-ng (3.3.10) on Ubuntu 14.04 i386,
and it sees the problem:

greearb@v-ubuntu-14-04-i386:~$ ./test-pkill
System command failed: ERROR: system command "pkill -f my-funky-cmdline" terminated with signal 15

 my-system rv: 15
greearb@v-ubuntu-14-04-i386:~$ pkill --version
pkill from procps-ng 3.3.10
greearb@v-ubuntu-14-04-i386:~$

But, exact same procps and test-pkill code works fine on Fedora-20:

[greearb@v-f20-32 ~]$ ./test-pkill
System command failed: ERROR: system command "pkill -f my-funky-cmdline" had return code: 1

 my-system rv: 256
[greearb@v-f20-32 ~]$ pkill --version
pkill from procps-ng 3.3.10
[greearb@v-f20-32 ~]$