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)

1 files changed, 0 insertions, 292 deletions

diff --git a/src/virt.c b/src/virt.c
deleted file mode 100644
index 4c526ff454..0000000000
--- a/src/virt.c
+++ /dev/null
@@ -1,292 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright 2011 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 <string.h>
-#include <errno.h>
-#include <unistd.h>
-
-#include "util.h"
-#include "virt.h"
-
-/* Returns a short identifier for the various VM implementations */
-int detect_vm(const char **id) {
-
-#if defined(__i386__) || defined(__x86_64__)
-
-        /* Both CPUID and DMI are x86 specific interfaces... */
-
-        static const char *const dmi_vendors[] = {
-                "/sys/class/dmi/id/sys_vendor",
-                "/sys/class/dmi/id/board_vendor",
-                "/sys/class/dmi/id/bios_vendor"
-        };
-
-        static const char dmi_vendor_table[] =
-                "QEMU\0"                  "qemu\0"
-                /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
-                "VMware\0"                "vmware\0"
-                "VMW\0"                   "vmware\0"
-                "Microsoft Corporation\0" "microsoft\0"
-                "innotek GmbH\0"          "oracle\0"
-                "Xen\0"                   "xen\0"
-                "Bochs\0"                 "bochs\0";
-
-        static const char cpuid_vendor_table[] =
-                "XenVMMXenVMM\0"          "xen\0"
-                "KVMKVMKVM\0"             "kvm\0"
-                /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
-                "VMwareVMware\0"          "vmware\0"
-                /* http://msdn.microsoft.com/en-us/library/ff542428.aspx */
-                "Microsoft Hv\0"          "microsoft\0";
-
-        uint32_t eax, ecx;
-        union {
-                uint32_t sig32[3];
-                char text[13];
-        } sig;
-        unsigned i;
-        const char *j, *k;
-        bool hypervisor;
-
-        /* http://lwn.net/Articles/301888/ */
-        zero(sig);
-
-#if defined (__i386__)
-#define REG_a "eax"
-#define REG_b "ebx"
-#elif defined (__amd64__)
-#define REG_a "rax"
-#define REG_b "rbx"
-#endif
-
-        /* First detect whether there is a hypervisor */
-        eax = 1;
-        __asm__ __volatile__ (
-                /* ebx/rbx is being used for PIC! */
-                "  push %%"REG_b"         \n\t"
-                "  cpuid                  \n\t"
-                "  pop %%"REG_b"          \n\t"
-
-                : "=a" (eax), "=c" (ecx)
-                : "0" (eax)
-        );
-
-        hypervisor = !!(ecx & 0x80000000U);
-
-        if (hypervisor) {
-
-                /* There is a hypervisor, see what it is */
-                eax = 0x40000000U;
-                __asm__ __volatile__ (
-                        /* ebx/rbx is being used for PIC! */
-                        "  push %%"REG_b"         \n\t"
-                        "  cpuid                  \n\t"
-                        "  mov %%ebx, %1          \n\t"
-                        "  pop %%"REG_b"          \n\t"
-
-                        : "=a" (eax), "=r" (sig.sig32[0]), "=c" (sig.sig32[1]), "=d" (sig.sig32[2])
-                        : "0" (eax)
-                );
-
-                NULSTR_FOREACH_PAIR(j, k, cpuid_vendor_table)
-                        if (streq(sig.text, j)) {
-
-                                if (id)
-                                        *id = k;
-
-                                return 1;
-                        }
-        }
-
-        for (i = 0; i < ELEMENTSOF(dmi_vendors); i++) {
-                char *s;
-                int r;
-                const char *found = NULL;
-
-                if ((r = read_one_line_file(dmi_vendors[i], &s)) < 0) {
-                        if (r != -ENOENT)
-                                return r;
-
-                        continue;
-                }
-
-                NULSTR_FOREACH_PAIR(j, k, dmi_vendor_table)
-                        if (startswith(s, j))
-                                found = k;
-                free(s);
-
-                if (found) {
-                        if (id)
-                                *id = found;
-
-                        return 1;
-                }
-        }
-
-        if (hypervisor) {
-                if (id)
-                        *id = "other";
-
-                return 1;
-        }
-
-#endif
-        return 0;
-}
-
-int detect_container(const char **id) {
-        FILE *f;
-
-        /* Unfortunately many of these operations require root access
-         * in one way or another */
-
-        if (geteuid() != 0)
-                return -EPERM;
-
-        if (running_in_chroot() > 0) {
-
-                if (id)
-                        *id = "chroot";
-
-                return 1;
-        }
-
-        /* /proc/vz exists in container and outside of the container,
-         * /proc/bc only outside of the container. */
-        if (access("/proc/vz", F_OK) >= 0 &&
-            access("/proc/bc", F_OK) < 0) {
-
-                if (id)
-                        *id = "openvz";
-
-                return 1;
-        }
-
-        f = fopen("/proc/1/environ", "re");
-        if (f) {
-                bool done = false;
-
-                do {
-                        char line[LINE_MAX];
-                        unsigned i;
-
-                        for (i = 0; i < sizeof(line)-1; i++) {
-                                int c;
-
-                                c = getc(f);
-                                if (_unlikely_(c == EOF)) {
-                                        done = true;
-                                        break;
-                                } else if (c == 0)
-                                        break;
-
-                                line[i] = c;
-                        }
-                        line[i] = 0;
-
-                        if (streq(line, "container=lxc")) {
-                                fclose(f);
-
-                                if (id)
-                                        *id = "lxc";
-                                return 1;
-
-                        } else if (streq(line, "container=lxc-libvirt")) {
-                                fclose(f);
-
-                                if (id)
-                                        *id = "lxc-libvirt";
-                                return 1;
-
-                        } else if (streq(line, "container=systemd-nspawn")) {
-                                fclose(f);
-
-                                if (id)
-                                        *id = "systemd-nspawn";
-                                return 1;
-
-                        } else if (startswith(line, "container=")) {
-                                fclose(f);
-
-                                if (id)
-                                        *id = "other";
-                                return 1;
-                        }
-
-                } while (!done);
-
-                fclose(f);
-        }
-
-        return 0;
-}
-
-/* Returns a short identifier for the various VM/container implementations */
-Virtualization detect_virtualization(const char **id) {
-
-        static __thread Virtualization cached_virt = _VIRTUALIZATION_INVALID;
-        static __thread const char *cached_id = NULL;
-
-        const char *_id;
-        int r;
-        Virtualization v;
-
-        if (_likely_(cached_virt >= 0)) {
-
-                if (id && cached_virt > 0)
-                        *id = cached_id;
-
-                return cached_virt;
-        }
-
-        r = detect_container(&_id);
-        if (r < 0) {
-                v = r;
-                goto finish;
-        } else if (r > 0) {
-                v = VIRTUALIZATION_CONTAINER;
-                goto finish;
-        }
-
-        r = detect_vm(&_id);
-        if (r < 0) {
-                v = r;
-                goto finish;
-        } else if (r > 0) {
-                v = VIRTUALIZATION_VM;
-                goto finish;
-        }
-
-        v = VIRTUALIZATION_NONE;
-
-finish:
-        if (v > 0) {
-                cached_id = _id;
-
-                if (id)
-                        *id = _id;
-        }
-
-        if (v >= 0)
-                cached_virt = v;
-
-        return v;
-}