util: move all to shared/ and split external dependencies in separate internal libraries

Before:
  $ ldd /lib/systemd/systemd-timestamp
  linux-vdso.so.1 =>  (0x00007fffb05ff000)
  libselinux.so.1 => /lib64/libselinux.so.1 (0x00007f90aac57000)
  libcap.so.2 => /lib64/libcap.so.2 (0x00007f90aaa53000)
  librt.so.1 => /lib64/librt.so.1 (0x00007f90aa84a000)
  libc.so.6 => /lib64/libc.so.6 (0x00007f90aa494000)
  /lib64/ld-linux-x86-64.so.2 (0x00007f90aae90000)
  libdl.so.2 => /lib64/libdl.so.2 (0x00007f90aa290000)
  libattr.so.1 => /lib64/libattr.so.1 (0x00007f90aa08a000)
  libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f90a9e6e000)

After:
  $ ldd systemd-timestamp
  linux-vdso.so.1 =>  (0x00007fff3cbff000)
  libselinux.so.1 => /lib64/libselinux.so.1 (0x00007f5eaa1c3000)
  librt.so.1 => /lib64/librt.so.1 (0x00007f5ea9fbb000)
  libc.so.6 => /lib64/libc.so.6 (0x00007f5ea9c04000)
  /lib64/ld-linux-x86-64.so.2 (0x00007f5eaa3fc000)
  libdl.so.2 => /lib64/libdl.so.2 (0x00007f5ea9a00000)
  libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f5ea97e4000)

33 files changed, 265 insertions, 141 deletions

diff --git a/src/execute.c b/src/execute.c
index dab485682b..179ca7e55c 100644
--- a/src/execute.c
+++ b/src/execute.c
@@ -45,6 +45,7 @@
 #include "execute.h"
 #include "strv.h"
 #include "macro.h"
+#include "capability.h"
 #include "util.h"
 #include "log.h"
 #include "ioprio.h"
diff --git a/src/journal/journald.h b/src/journal/journald.h
index 6160991ed8..7840fd5730 100644
--- a/src/journal/journald.h
+++ b/src/journal/journald.h
@@ -29,6 +29,7 @@
 #include "journal-file.h"
 #include "hashmap.h"
 #include "util.h"
+#include "audit.h"
 #include "journal-rate-limit.h"
 #include "list.h"
 
diff --git a/src/login/logind.h b/src/login/logind.h
index a4b4602675..9586793ad4 100644
--- a/src/login/logind.h
+++ b/src/login/logind.h
@@ -28,6 +28,7 @@
 #include <libudev.h>
 
 #include "util.h"
+#include "audit.h"
 #include "list.h"
 #include "hashmap.h"
 #include "cgroup-util.h"
diff --git a/src/login/pam-module.c b/src/login/pam-module.c
index 4106d2ba4b..1edb91c804 100644
--- a/src/login/pam-module.c
+++ b/src/login/pam-module.c
@@ -35,6 +35,7 @@
 #include <systemd/sd-daemon.h>
 
 #include "util.h"
+#include "audit.h"
 #include "macro.h"
 #include "strv.h"
 #include "dbus-common.h"
diff --git a/src/nspawn.c b/src/nspawn.c
index 6f5a9d9547..66910bc684 100644
--- a/src/nspawn.c
+++ b/src/nspawn.c
@@ -43,6 +43,7 @@
 
 #include "log.h"
 #include "util.h"
+#include "audit.h"
 #include "missing.h"
 #include "cgroup-util.h"
 #include "strv.h"
diff --git a/src/shared/audit.c b/src/shared/audit.c
new file mode 100644
index 0000000000..3850059132
--- /dev/null
+++ b/src/shared/audit.c
@@ -0,0 +1,118 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <assert.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <sys/prctl.h>
+#include <sys/capability.h>
+
+#include "macro.h"
+#include "audit.h"
+#include "util.h"
+#include "log.h"
+
+int audit_session_from_pid(pid_t pid, uint32_t *id) {
+        char *s;
+        uint32_t u;
+        int r;
+
+        assert(id);
+
+        if (have_effective_cap(CAP_AUDIT_CONTROL) <= 0)
+                return -ENOENT;
+
+        if (pid == 0)
+                r = read_one_line_file("/proc/self/sessionid", &s);
+        else {
+                char *p;
+
+                if (asprintf(&p, "/proc/%lu/sessionid", (unsigned long) pid) < 0)
+                        return -ENOMEM;
+
+                r = read_one_line_file(p, &s);
+                free(p);
+        }
+
+        if (r < 0)
+                return r;
+
+        r = safe_atou32(s, &u);
+        free(s);
+
+        if (r < 0)
+                return r;
+
+        if (u == (uint32_t) -1 || u <= 0)
+                return -ENOENT;
+
+        *id = u;
+        return 0;
+}
+
+int audit_loginuid_from_pid(pid_t pid, uid_t *uid) {
+        char *s;
+        uid_t u;
+        int r;
+
+        assert(uid);
+
+        /* Only use audit login uid if we are executed with sufficient
+         * capabilities so that pam_loginuid could do its job. If we
+         * are lacking the CAP_AUDIT_CONTROL capabality we most likely
+         * are being run in a container and /proc/self/loginuid is
+         * useless since it probably contains a uid of the host
+         * system. */
+
+        if (have_effective_cap(CAP_AUDIT_CONTROL) <= 0)
+                return -ENOENT;
+
+        if (pid == 0)
+                r = read_one_line_file("/proc/self/loginuid", &s);
+        else {
+                char *p;
+
+                if (asprintf(&p, "/proc/%lu/loginuid", (unsigned long) pid) < 0)
+                        return -ENOMEM;
+
+                r = read_one_line_file(p, &s);
+                free(p);
+        }
+
+        if (r < 0)
+                return r;
+
+        r = parse_uid(s, &u);
+        free(s);
+
+        if (r < 0)
+                return r;
+
+        if (u == (uid_t) -1)
+                return -ENOENT;
+
+        *uid = (uid_t) u;
+        return 0;
+}
diff --git a/src/shared/audit.h b/src/shared/audit.h
new file mode 100644
index 0000000000..3529046ff3
--- /dev/null
+++ b/src/shared/audit.h
@@ -0,0 +1,29 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#ifndef fooaudithfoo
+#define fooaudithfoo
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "capability.h"
+
+int audit_session_from_pid(pid_t pid, uint32_t *id);
+int audit_loginuid_from_pid(pid_t pid, uid_t *uid);
+#endif
diff --git a/src/shared/capability.c b/src/shared/capability.c
new file mode 100644
index 0000000000..b8002159ec
--- /dev/null
+++ b/src/shared/capability.c
@@ -0,0 +1,86 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <assert.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <sys/capability.h>
+#include <sys/prctl.h>
+
+#include "macro.h"
+#include "capability.h"
+#include "util.h"
+#include "log.h"
+
+int have_effective_cap(int value) {
+        cap_t cap;
+        cap_flag_value_t fv;
+        int r;
+
+        if (!(cap = cap_get_proc()))
+                return -errno;
+
+        if (cap_get_flag(cap, value, CAP_EFFECTIVE, &fv) < 0)
+                r = -errno;
+        else
+                r = fv == CAP_SET;
+
+        cap_free(cap);
+        return r;
+}
+
+unsigned long cap_last_cap(void) {
+        static __thread unsigned long saved;
+        static __thread bool valid = false;
+        unsigned long p;
+
+        if (valid)
+                return saved;
+
+        p = (unsigned long) CAP_LAST_CAP;
+
+        if (prctl(PR_CAPBSET_READ, p) < 0) {
+
+                /* Hmm, look downwards, until we find one that
+                 * works */
+                for (p--; p > 0; p --)
+                        if (prctl(PR_CAPBSET_READ, p) >= 0)
+                                break;
+
+        } else {
+
+                /* Hmm, look upwards, until we find one that doesn't
+                 * work */
+                for (;; p++)
+                        if (prctl(PR_CAPBSET_READ, p+1) < 0)
+                                break;
+        }
+
+        saved = p;
+        valid = true;
+
+        return p;
+}
diff --git a/src/shared/capability.h b/src/shared/capability.h
new file mode 100644
index 0000000000..ab7e40b601
--- /dev/null
+++ b/src/shared/capability.h
@@ -0,0 +1,27 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#ifndef foocapabilityhfoo
+#define foocapabilityhfoo
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+unsigned long cap_last_cap(void);
+int have_effective_cap(int value);
+#endif
diff --git a/src/conf-parser.c b/src/shared/conf-parser.c
index a9b01135e6..a9b01135e6 100644
--- a/src/conf-parser.c
+++ b/src/shared/conf-parser.c
diff --git a/src/conf-parser.h b/src/shared/conf-parser.h
index be7d708171..be7d708171 100644
--- a/src/conf-parser.h
+++ b/src/shared/conf-parser.h
diff --git a/src/exit-status.c b/src/shared/exit-status.c
index ab8907d32c..ab8907d32c 100644
--- a/src/exit-status.c
+++ b/src/shared/exit-status.c
diff --git a/src/exit-status.h b/src/shared/exit-status.h
index 44ef879562..44ef879562 100644
--- a/src/exit-status.h
+++ b/src/shared/exit-status.h
diff --git a/src/hashmap.c b/src/shared/hashmap.c
index 6928118615..6928118615 100644
--- a/src/hashmap.c
+++ b/src/shared/hashmap.c
diff --git a/src/hashmap.h b/src/shared/hashmap.h
index ab4363a7a3..ab4363a7a3 100644
--- a/src/hashmap.h
+++ b/src/shared/hashmap.h
diff --git a/src/label.c b/src/shared/label.c
index 2c887a0fe5..2c887a0fe5 100644
--- a/src/label.c
+++ b/src/shared/label.c
diff --git a/src/label.h b/src/shared/label.h
index ead44837a4..ead44837a4 100644
--- a/src/label.h
+++ b/src/shared/label.h
diff --git a/src/log.c b/src/shared/log.c
index 9fffc1dbc0..9fffc1dbc0 100644
--- a/src/log.c
+++ b/src/shared/log.c
diff --git a/src/log.h b/src/shared/log.h
index 3283808ff8..3283808ff8 100644
--- a/src/log.h
+++ b/src/shared/log.h
diff --git a/src/ratelimit.c b/src/shared/ratelimit.c
index 93157c7a2e..93157c7a2e 100644
--- a/src/ratelimit.c
+++ b/src/shared/ratelimit.c
diff --git a/src/ratelimit.h b/src/shared/ratelimit.h
index a6443e7f87..a6443e7f87 100644
--- a/src/ratelimit.h
+++ b/src/shared/ratelimit.h
diff --git a/src/set.c b/src/shared/set.c
index 097b9d3aae..097b9d3aae 100644
--- a/src/set.c
+++ b/src/shared/set.c
diff --git a/src/set.h b/src/shared/set.h
index 885780c4c0..885780c4c0 100644
--- a/src/set.h
+++ b/src/shared/set.h
diff --git a/src/socket-util.c b/src/shared/socket-util.c
index acc4d33372..acc4d33372 100644
--- a/src/socket-util.c
+++ b/src/shared/socket-util.c
diff --git a/src/socket-util.h b/src/shared/socket-util.h
index 8ccbd371cf..8ccbd371cf 100644
--- a/src/socket-util.h
+++ b/src/shared/socket-util.h
diff --git a/src/strv.c b/src/shared/strv.c
index bb309d9f92..bb309d9f92 100644
--- a/src/strv.c
+++ b/src/shared/strv.c
diff --git a/src/strv.h b/src/shared/strv.h
index d038c9f3b1..d038c9f3b1 100644
--- a/src/strv.h
+++ b/src/shared/strv.h
diff --git a/src/utf8.c b/src/shared/utf8.c
index 11619dce2f..11619dce2f 100644
--- a/src/utf8.c
+++ b/src/shared/utf8.c
diff --git a/src/utf8.h b/src/shared/utf8.h
index 9a72bec084..9a72bec084 100644
--- a/src/utf8.h
+++ b/src/shared/utf8.h
diff --git a/src/util.c b/src/shared/util.c
index dfc1dc6b85..563853fad6 100644
--- a/src/util.c
+++ b/src/shared/util.c
@@ -4716,23 +4716,6 @@ void skip_syslog_date(char **buf) {
         *buf = p;
 }
 
-int have_effective_cap(int value) {
-        cap_t cap;
-        cap_flag_value_t fv;
-        int r;
-
-        if (!(cap = cap_get_proc()))
-                return -errno;
-
-        if (cap_get_flag(cap, value, CAP_EFFECTIVE, &fv) < 0)
-                r = -errno;
-        else
-                r = fv == CAP_SET;
-
-        cap_free(cap);
-        return r;
-}
-
 char* strshorten(char *s, size_t l) {
         assert(s);
 
@@ -5399,89 +5382,6 @@ int symlink_or_copy_atomic(const char *from, const char *to) {
         return r;
 }
 
-int audit_session_from_pid(pid_t pid, uint32_t *id) {
-        char *s;
-        uint32_t u;
-        int r;
-
-        assert(id);
-
-        if (have_effective_cap(CAP_AUDIT_CONTROL) <= 0)
-                return -ENOENT;
-
-        if (pid == 0)
-                r = read_one_line_file("/proc/self/sessionid", &s);
-        else {
-                char *p;
-
-                if (asprintf(&p, "/proc/%lu/sessionid", (unsigned long) pid) < 0)
-                        return -ENOMEM;
-
-                r = read_one_line_file(p, &s);
-                free(p);
-        }
-
-        if (r < 0)
-                return r;
-
-        r = safe_atou32(s, &u);
-        free(s);
-
-        if (r < 0)
-                return r;
-
-        if (u == (uint32_t) -1 || u <= 0)
-                return -ENOENT;
-
-        *id = u;
-        return 0;
-}
-
-int audit_loginuid_from_pid(pid_t pid, uid_t *uid) {
-        char *s;
-        uid_t u;
-        int r;
-
-        assert(uid);
-
-        /* Only use audit login uid if we are executed with sufficient
-         * capabilities so that pam_loginuid could do its job. If we
-         * are lacking the CAP_AUDIT_CONTROL capabality we most likely
-         * are being run in a container and /proc/self/loginuid is
-         * useless since it probably contains a uid of the host
-         * system. */
-
-        if (have_effective_cap(CAP_AUDIT_CONTROL) <= 0)
-                return -ENOENT;
-
-        if (pid == 0)
-                r = read_one_line_file("/proc/self/loginuid", &s);
-        else {
-                char *p;
-
-                if (asprintf(&p, "/proc/%lu/loginuid", (unsigned long) pid) < 0)
-                        return -ENOMEM;
-
-                r = read_one_line_file(p, &s);
-                free(p);
-        }
-
-        if (r < 0)
-                return r;
-
-        r = parse_uid(s, &u);
-        free(s);
-
-        if (r < 0)
-                return r;
-
-        if (u == (uid_t) -1)
-                return -ENOENT;
-
-        *uid = (uid_t) u;
-        return 0;
-}
-
 bool display_is_local(const char *display) {
         assert(display);
 
@@ -6137,39 +6037,6 @@ int prot_from_flags(int flags) {
         }
 }
 
-unsigned long cap_last_cap(void) {
-        static __thread unsigned long saved;
-        static __thread bool valid = false;
-        unsigned long p;
-
-        if (valid)
-                return saved;
-
-        p = (unsigned long) CAP_LAST_CAP;
-
-        if (prctl(PR_CAPBSET_READ, p) < 0) {
-
-                /* Hmm, look downwards, until we find one that
-                 * works */
-                for (p--; p > 0; p --)
-                        if (prctl(PR_CAPBSET_READ, p) >= 0)
-                                break;
-
-        } else {
-
-                /* Hmm, look upwards, until we find one that doesn't
-                 * work */
-                for (;; p++)
-                        if (prctl(PR_CAPBSET_READ, p+1) < 0)
-                                break;
-        }
-
-        saved = p;
-        valid = true;
-
-        return p;
-}
-
 char *format_bytes(char *buf, size_t l, off_t t) {
         unsigned i;
 
diff --git a/src/util.h b/src/shared/util.h
index b1af6dbe7c..e96d56dd2a 100644
--- a/src/util.h
+++ b/src/shared/util.h
@@ -431,8 +431,6 @@ void parse_syslog_priority(char **p, int *priority);
 void skip_syslog_pid(char **buf);
 void skip_syslog_date(char **buf);
 
-int have_effective_cap(int value);
-
 bool hostname_is_valid(const char *s);
 char* hostname_cleanup(char *s);
 
@@ -457,9 +455,6 @@ int hwclock_reset_localtime_delta(void);
 int hwclock_get_time(struct tm *tm);
 int hwclock_set_time(const struct tm *tm);
 
-int audit_session_from_pid(pid_t pid, uint32_t *id);
-int audit_loginuid_from_pid(pid_t pid, uid_t *uid);
-
 bool display_is_local(const char *display);
 int socket_from_display(const char *display, char **path);
 
@@ -526,8 +521,6 @@ bool kexec_loaded(void);
 
 int prot_from_flags(int flags);
 
-unsigned long cap_last_cap(void);
-
 char *format_bytes(char *buf, size_t l, off_t t);
 
 int fd_wait_for_event(int fd, int event, usec_t timeout);
@@ -540,5 +533,4 @@ int is_kernel_thread(pid_t pid);
 
 int fd_inc_sndbuf(int fd, size_t n);
 int fd_inc_rcvbuf(int fd, size_t n);
-
 #endif
diff --git a/src/virt.c b/src/shared/virt.c
index 4c526ff454..4c526ff454 100644
--- a/src/virt.c
+++ b/src/shared/virt.c
diff --git a/src/virt.h b/src/shared/virt.h
index f55c9a68fd..f55c9a68fd 100644
--- a/src/virt.h
+++ b/src/shared/virt.h