build-sys: move source files to subdirectory

1 files changed, 1483 insertions, 0 deletions

diff --git a/src/load-fragment.c b/src/load-fragment.c
new file mode 100644
index 0000000000..148a579d99
--- /dev/null
+++ b/src/load-fragment.c
@@ -0,0 +1,1483 @@
+/*-*- Mode: C; c-basic-offset: 8 -*-*/
+
+/***
+  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 <linux/oom.h>
+#include <assert.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sched.h>
+#include <sys/prctl.h>
+#include <sys/mount.h>
+#include <linux/fs.h>
+
+#include "unit.h"
+#include "strv.h"
+#include "conf-parser.h"
+#include "load-fragment.h"
+#include "log.h"
+#include "ioprio.h"
+#include "securebits.h"
+#include "missing.h"
+#include "unit-name.h"
+
+#define DEFINE_CONFIG_PARSE_ENUM(function,name,type,msg)                \
+        static int function(                                            \
+                        const char *filename,                           \
+                        unsigned line,                                  \
+                        const char *section,                            \
+                        const char *lvalue,                             \
+                        const char *rvalue,                             \
+                        void *data,                                     \
+                        void *userdata) {                               \
+                                                                        \
+                type *i = data, x;                                      \
+                                                                        \
+                assert(filename);                                       \
+                assert(lvalue);                                         \
+                assert(rvalue);                                         \
+                assert(data);                                           \
+                                                                        \
+                if ((x = name##_from_string(rvalue)) < 0) {             \
+                        log_error("[%s:%u] " msg ": %s", filename, line, rvalue); \
+                        return -EBADMSG;                                \
+                }                                                       \
+                                                                        \
+                *i = x;                                                 \
+                                                                        \
+                return 0;                                               \
+        }
+
+static int config_parse_deps(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        UnitDependency d = PTR_TO_UINT(data);
+        Unit *u = userdata;
+        char *w;
+        size_t l;
+        char *state;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        FOREACH_WORD(w, l, rvalue, state) {
+                char *t, *k;
+                int r;
+
+                if (!(t = strndup(w, l)))
+                        return -ENOMEM;
+
+                k = unit_name_printf(u, t);
+                free(t);
+
+                if (!k)
+                        return -ENOMEM;
+
+                r = unit_add_dependency_by_name(u, d, k, NULL, true);
+                free(k);
+
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static int config_parse_names(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Unit *u = userdata;
+        char *w;
+        size_t l;
+        char *state;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        FOREACH_WORD(w, l, rvalue, state) {
+                char *t, *k;
+                int r;
+
+                if (!(t = strndup(w, l)))
+                        return -ENOMEM;
+
+                k = unit_name_printf(u, t);
+                free(t);
+
+                if (!k)
+                        return -ENOMEM;
+
+                r = unit_merge_by_name(u, k);
+                free(k);
+
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static int config_parse_description(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Unit *u = userdata;
+        char *k;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (!(k = unit_full_printf(u, rvalue)))
+                return -ENOMEM;
+
+        free(u->meta.description);
+
+        if (*k)
+                u->meta.description = k;
+        else {
+                free(k);
+                u->meta.description = NULL;
+        }
+
+        return 0;
+}
+
+static int config_parse_listen(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        int r;
+        SocketPort *p;
+        Socket *s;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        s = (Socket*) data;
+
+        if (!(p = new0(SocketPort, 1)))
+                return -ENOMEM;
+
+        if (streq(lvalue, "ListenFIFO")) {
+                p->type = SOCKET_FIFO;
+
+                if (!(p->path = strdup(rvalue))) {
+                        free(p);
+                        return -ENOMEM;
+                }
+        } else {
+                p->type = SOCKET_SOCKET;
+
+                if ((r = socket_address_parse(&p->address, rvalue)) < 0) {
+                        log_error("[%s:%u] Failed to parse address value: %s", filename, line, rvalue);
+                        free(p);
+                        return r;
+                }
+
+                if (streq(lvalue, "ListenStream"))
+                        p->address.type = SOCK_STREAM;
+                else if (streq(lvalue, "ListenDatagram"))
+                        p->address.type = SOCK_DGRAM;
+                else {
+                        assert(streq(lvalue, "ListenSequentialPacket"));
+                        p->address.type = SOCK_SEQPACKET;
+                }
+
+                if (socket_address_family(&p->address) != AF_LOCAL && p->address.type == SOCK_SEQPACKET) {
+                        free(p);
+                        return -EPROTONOSUPPORT;
+                }
+        }
+
+        p->fd = -1;
+        LIST_PREPEND(SocketPort, port, s->ports, p);
+
+        return 0;
+}
+
+static int config_parse_socket_bind(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        int r;
+        Socket *s;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        s = (Socket*) data;
+
+        if ((r = parse_boolean(rvalue)) < 0) {
+                log_error("[%s:%u] Failed to parse bind IPv6 only value: %s", filename, line, rvalue);
+                return r;
+        }
+
+        s->bind_ipv6_only = r ? SOCKET_ADDRESS_IPV6_ONLY : SOCKET_ADDRESS_BOTH;
+
+        return 0;
+}
+
+static int config_parse_nice(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        ExecContext *c = data;
+        int priority, r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if ((r = safe_atoi(rvalue, &priority)) < 0) {
+                log_error("[%s:%u] Failed to parse nice priority: %s", filename, line, rvalue);
+                return r;
+        }
+
+        if (priority < PRIO_MIN || priority >= PRIO_MAX) {
+                log_error("[%s:%u] Nice priority out of range: %s", filename, line, rvalue);
+                return -ERANGE;
+        }
+
+        c->nice = priority;
+        c->nice_set = false;
+
+        return 0;
+}
+
+static int config_parse_oom_adjust(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        ExecContext *c = data;
+        int oa, r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if ((r = safe_atoi(rvalue, &oa)) < 0) {
+                log_error("[%s:%u] Failed to parse OOM adjust value: %s", filename, line, rvalue);
+                return r;
+        }
+
+        if (oa < OOM_DISABLE || oa > OOM_ADJUST_MAX) {
+                log_error("[%s:%u] OOM adjust value out of range: %s", filename, line, rvalue);
+                return -ERANGE;
+        }
+
+        c->oom_adjust = oa;
+        c->oom_adjust_set = true;
+
+        return 0;
+}
+
+static int config_parse_mode(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        mode_t *m = data;
+        long l;
+        char *x = NULL;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        errno = 0;
+        l = strtol(rvalue, &x, 8);
+        if (!x || *x || errno) {
+                log_error("[%s:%u] Failed to parse mode value: %s", filename, line, rvalue);
+                return errno ? -errno : -EINVAL;
+        }
+
+        if (l < 0000 || l > 07777) {
+                log_error("[%s:%u] mode value out of range: %s", filename, line, rvalue);
+                return -ERANGE;
+        }
+
+        *m = (mode_t) l;
+        return 0;
+}
+
+static int config_parse_exec(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        ExecCommand **e = data, *nce = NULL;
+        char **n;
+        char *w;
+        unsigned k;
+        size_t l;
+        char *state;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        k = 0;
+        FOREACH_WORD_QUOTED(w, l, rvalue, state)
+                k++;
+
+        if (!(n = new(char*, k+1)))
+                return -ENOMEM;
+
+        k = 0;
+        FOREACH_WORD_QUOTED(w, l, rvalue, state)
+                if (!(n[k++] = strndup(w, l)))
+                        goto fail;
+
+        n[k] = NULL;
+
+        if (!n[0] || !path_is_absolute(n[0])) {
+                log_error("[%s:%u] Invalid executable path in command line: %s", filename, line, rvalue);
+                strv_free(n);
+                return -EINVAL;
+        }
+
+        if (!(nce = new0(ExecCommand, 1)))
+                goto fail;
+
+        nce->argv = n;
+        if (!(nce->path = strdup(n[0])))
+                goto fail;
+
+        exec_command_append_list(e, nce);
+
+        return 0;
+
+fail:
+        for (; k > 0; k--)
+                free(n[k-1]);
+        free(n);
+
+        free(nce);
+
+        return -ENOMEM;
+}
+
+static int config_parse_usec(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        usec_t *usec = data;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if ((r = parse_usec(rvalue, usec)) < 0) {
+                log_error("[%s:%u] Failed to parse time value: %s", filename, line, rvalue);
+                return r;
+        }
+
+        return 0;
+}
+
+DEFINE_CONFIG_PARSE_ENUM(config_parse_service_type, service_type, ServiceType, "Failed to parse service type");
+DEFINE_CONFIG_PARSE_ENUM(config_parse_service_restart, service_restart, ServiceRestart, "Failed to parse service restart specifier");
+
+static int config_parse_bindtodevice(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Socket *s = data;
+        char *n;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (rvalue[0] && !streq(rvalue, "*")) {
+                if (!(n = strdup(rvalue)))
+                        return -ENOMEM;
+        } else
+                n = NULL;
+
+        free(s->bind_to_device);
+        s->bind_to_device = n;
+
+        return 0;
+}
+
+DEFINE_CONFIG_PARSE_ENUM(config_parse_output, exec_output, ExecOutput, "Failed to parse output specifier");
+DEFINE_CONFIG_PARSE_ENUM(config_parse_input, exec_input, ExecInput, "Failed to parse input specifier");
+
+static int config_parse_facility(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+
+        int *o = data, x;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if ((x = log_facility_from_string(rvalue)) < 0) {
+                log_error("[%s:%u] Failed to parse log facility: %s", filename, line, rvalue);
+                return -EBADMSG;
+        }
+
+        *o = LOG_MAKEPRI(x, LOG_PRI(*o));
+
+        return 0;
+}
+
+static int config_parse_level(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+
+        int *o = data, x;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if ((x = log_level_from_string(rvalue)) < 0) {
+                log_error("[%s:%u] Failed to parse log level: %s", filename, line, rvalue);
+                return -EBADMSG;
+        }
+
+        *o = LOG_MAKEPRI(LOG_FAC(*o), x);
+        return 0;
+}
+
+static int config_parse_io_class(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        ExecContext *c = data;
+        int x;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if ((x = ioprio_class_from_string(rvalue)) < 0) {
+                log_error("[%s:%u] Failed to parse IO scheduling class: %s", filename, line, rvalue);
+                return -EBADMSG;
+        }
+
+        c->ioprio = IOPRIO_PRIO_VALUE(x, IOPRIO_PRIO_DATA(c->ioprio));
+        c->ioprio_set = true;
+
+        return 0;
+}
+
+static int config_parse_io_priority(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        ExecContext *c = data;
+        int i;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (safe_atoi(rvalue, &i) < 0 || i < 0 || i >= IOPRIO_BE_NR) {
+                log_error("[%s:%u] Failed to parse io priority: %s", filename, line, rvalue);
+                return -EBADMSG;
+        }
+
+        c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_PRIO_CLASS(c->ioprio), i);
+        c->ioprio_set = true;
+
+        return 0;
+}
+
+static int config_parse_cpu_sched_policy(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+
+        ExecContext *c = data;
+        int x;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if ((x = sched_policy_from_string(rvalue)) < 0) {
+                log_error("[%s:%u] Failed to parse CPU scheduling policy: %s", filename, line, rvalue);
+                return -EBADMSG;
+        }
+
+        c->cpu_sched_policy = x;
+        c->cpu_sched_set = true;
+
+        return 0;
+}
+
+static int config_parse_cpu_sched_prio(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        ExecContext *c = data;
+        int i;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        /* On Linux RR/FIFO have the same range */
+        if (safe_atoi(rvalue, &i) < 0 || i < sched_get_priority_min(SCHED_RR) || i > sched_get_priority_max(SCHED_RR)) {
+                log_error("[%s:%u] Failed to parse CPU scheduling priority: %s", filename, line, rvalue);
+                return -EBADMSG;
+        }
+
+        c->cpu_sched_priority = i;
+        c->cpu_sched_set = true;
+
+        return 0;
+}
+
+static int config_parse_cpu_affinity(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        ExecContext *c = data;
+        char *w;
+        size_t l;
+        char *state;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        FOREACH_WORD(w, l, rvalue, state) {
+                char *t;
+                int r;
+                unsigned cpu;
+
+                if (!(t = strndup(w, l)))
+                        return -ENOMEM;
+
+                r = safe_atou(t, &cpu);
+                free(t);
+
+                if (r < 0 || cpu >= CPU_SETSIZE) {
+                        log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
+                        return -EBADMSG;
+                }
+
+                CPU_SET(cpu, &c->cpu_affinity);
+        }
+
+        c->cpu_affinity_set = true;
+
+        return 0;
+}
+
+static int config_parse_capabilities(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        ExecContext *c = data;
+        cap_t cap;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (!(cap = cap_from_text(rvalue))) {
+                if (errno == ENOMEM)
+                        return -ENOMEM;
+
+                log_error("[%s:%u] Failed to parse capabilities: %s", filename, line, rvalue);
+                return -EBADMSG;
+        }
+
+        if (c->capabilities)
+                cap_free(c->capabilities);
+        c->capabilities = cap;
+
+        return 0;
+}
+
+static int config_parse_secure_bits(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        ExecContext *c = data;
+        char *w;
+        size_t l;
+        char *state;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        FOREACH_WORD(w, l, rvalue, state) {
+                if (first_word(w, "keep-caps"))
+                        c->secure_bits |= SECURE_KEEP_CAPS;
+                else if (first_word(w, "keep-caps-locked"))
+                        c->secure_bits |= SECURE_KEEP_CAPS_LOCKED;
+                else if (first_word(w, "no-setuid-fixup"))
+                        c->secure_bits |= SECURE_NO_SETUID_FIXUP;
+                else if (first_word(w, "no-setuid-fixup-locked"))
+                        c->secure_bits |= SECURE_NO_SETUID_FIXUP_LOCKED;
+                else if (first_word(w, "noroot"))
+                        c->secure_bits |= SECURE_NOROOT;
+                else if (first_word(w, "noroot-locked"))
+                        c->secure_bits |= SECURE_NOROOT_LOCKED;
+                else {
+                        log_error("[%s:%u] Failed to parse secure bits: %s", filename, line, rvalue);
+                        return -EBADMSG;
+                }
+        }
+
+        return 0;
+}
+
+static int config_parse_bounding_set(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        ExecContext *c = data;
+        char *w;
+        size_t l;
+        char *state;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        FOREACH_WORD(w, l, rvalue, state) {
+                char *t;
+                int r;
+                cap_value_t cap;
+
+                if (!(t = strndup(w, l)))
+                        return -ENOMEM;
+
+                r = cap_from_name(t, &cap);
+                free(t);
+
+                if (r < 0) {
+                        log_error("[%s:%u] Failed to parse capability bounding set: %s", filename, line, rvalue);
+                        return -EBADMSG;
+                }
+
+                c->capability_bounding_set_drop |= 1 << cap;
+        }
+
+        return 0;
+}
+
+static int config_parse_timer_slack_ns(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        ExecContext *c = data;
+        unsigned long u;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if ((r = safe_atolu(rvalue, &u)) < 0) {
+                log_error("[%s:%u] Failed to parse time slack value: %s", filename, line, rvalue);
+                return r;
+        }
+
+        c->timer_slack_ns = u;
+
+        return 0;
+}
+
+static int config_parse_limit(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        struct rlimit **rl = data;
+        unsigned long long u;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if ((r = safe_atollu(rvalue, &u)) < 0) {
+                log_error("[%s:%u] Failed to parse resource value: %s", filename, line, rvalue);
+                return r;
+        }
+
+        if (!*rl)
+                if (!(*rl = new(struct rlimit, 1)))
+                        return -ENOMEM;
+
+        (*rl)->rlim_cur = (*rl)->rlim_max = (rlim_t) u;
+        return 0;
+}
+
+static int config_parse_cgroup(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Unit *u = userdata;
+        char *w;
+        size_t l;
+        char *state;
+
+        FOREACH_WORD(w, l, rvalue, state) {
+                char *t;
+                int r;
+
+                if (!(t = strndup(w, l)))
+                        return -ENOMEM;
+
+                r = unit_add_cgroup_from_text(u, t);
+                free(t);
+
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static int config_parse_sysv_priority(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        int *priority = data;
+        int r, i;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if ((r = safe_atoi(rvalue, &i)) < 0 || i < 0) {
+                log_error("[%s:%u] Failed to parse SysV start priority: %s", filename, line, rvalue);
+                return r;
+        }
+
+        *priority = (int) i;
+        return 0;
+}
+
+DEFINE_CONFIG_PARSE_ENUM(config_parse_kill_mode, kill_mode, KillMode, "Failed to parse kill mode");
+
+static int config_parse_mount_flags(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        ExecContext *c = data;
+        char *w;
+        size_t l;
+        char *state;
+        unsigned long flags = 0;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        FOREACH_WORD(w, l, rvalue, state) {
+                if (strncmp(w, "shared", l) == 0)
+                        flags |= MS_SHARED;
+                else if (strncmp(w, "slave", l) == 0)
+                        flags |= MS_SLAVE;
+                else if (strncmp(w, "private", l) == 0)
+                        flags |= MS_PRIVATE;
+                else {
+                        log_error("[%s:%u] Failed to parse mount flags: %s", filename, line, rvalue);
+                        return -EINVAL;
+                }
+        }
+
+        c->mount_flags = flags;
+        return 0;
+}
+
+#define FOLLOW_MAX 8
+
+static int open_follow(char **filename, FILE **_f, Set *names, char **_final) {
+        unsigned c = 0;
+        int fd, r;
+        FILE *f;
+        char *id = NULL;
+
+        assert(filename);
+        assert(*filename);
+        assert(_f);
+        assert(names);
+
+        /* This will update the filename pointer if the loaded file is
+         * reached by a symlink. The old string will be freed. */
+
+        for (;;) {
+                char *target, *k, *name;
+
+                if (c++ >= FOLLOW_MAX)
+                        return -ELOOP;
+
+                path_kill_slashes(*filename);
+
+                /* Add the file name we are currently looking at to
+                 * the names of this unit */
+                name = file_name_from_path(*filename);
+                if (!(id = set_get(names, name))) {
+
+                        if (!(id = strdup(name)))
+                                return -ENOMEM;
+
+                        if ((r = set_put(names, id)) < 0) {
+                                free(id);
+                                return r;
+                        }
+                }
+
+                /* Try to open the file name, but don't if its a symlink */
+                if ((fd = open(*filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW)) >= 0)
+                        break;
+
+                if (errno != ELOOP)
+                        return -errno;
+
+                /* Hmm, so this is a symlink. Let's read the name, and follow it manually */
+                if ((r = readlink_malloc(*filename, &target)) < 0)
+                        return r;
+
+                k = file_in_same_dir(*filename, target);
+                free(target);
+
+                if (!k)
+                        return -ENOMEM;
+
+                free(*filename);
+                *filename = k;
+        }
+
+        if (!(f = fdopen(fd, "r"))) {
+                r = -errno;
+                close_nointr_nofail(fd);
+                return r;
+        }
+
+        *_f = f;
+        *_final = id;
+        return 0;
+}
+
+static int merge_by_names(Unit **u, Set *names, const char *id) {
+        char *k;
+        int r;
+
+        assert(u);
+        assert(*u);
+        assert(names);
+
+        /* Let's try to add in all symlink names we found */
+        while ((k = set_steal_first(names))) {
+
+                /* First try to merge in the other name into our
+                 * unit */
+                if ((r = unit_merge_by_name(*u, k)) < 0) {
+                        Unit *other;
+
+                        /* Hmm, we couldn't merge the other unit into
+                         * ours? Then let's try it the other way
+                         * round */
+
+                        other = manager_get_unit((*u)->meta.manager, k);
+                        free(k);
+
+                        if (other)
+                                if ((r = unit_merge(other, *u)) >= 0) {
+                                        *u = other;
+                                        return merge_by_names(u, names, NULL);
+                                }
+
+                        return r;
+                }
+
+                if (id == k)
+                        unit_choose_id(*u, id);
+
+                free(k);
+        }
+
+        return 0;
+}
+
+static void dump_items(FILE *f, const ConfigItem *items) {
+        const ConfigItem *i;
+        const char *prev_section = NULL;
+        bool not_first = false;
+
+        struct {
+                ConfigParserCallback callback;
+                const char *rvalue;
+        } table[] = {
+                { config_parse_int,              "INTEGER" },
+                { config_parse_unsigned,         "UNSIGNED" },
+                { config_parse_size,             "SIZE" },
+                { config_parse_bool,             "BOOLEAN" },
+                { config_parse_string,           "STRING" },
+                { config_parse_path,             "PATH" },
+                { config_parse_strv,             "STRING [...]" },
+                { config_parse_nice,             "NICE" },
+                { config_parse_oom_adjust,       "OOMADJUST" },
+                { config_parse_io_class,         "IOCLASS" },
+                { config_parse_io_priority,      "IOPRIORITY" },
+                { config_parse_cpu_sched_policy, "CPUSCHEDPOLICY" },
+                { config_parse_cpu_sched_prio,   "CPUSCHEDPRIO" },
+                { config_parse_cpu_affinity,     "CPUAFFINITY" },
+                { config_parse_mode,             "MODE" },
+                { config_parse_output,           "OUTPUT" },
+                { config_parse_input,            "INPUT" },
+                { config_parse_facility,         "FACILITY" },
+                { config_parse_level,            "LEVEL" },
+                { config_parse_capabilities,     "CAPABILITIES" },
+                { config_parse_secure_bits,      "SECUREBITS" },
+                { config_parse_bounding_set,     "BOUNDINGSET" },
+                { config_parse_timer_slack_ns,   "TIMERSLACK" },
+                { config_parse_limit,            "LIMIT" },
+                { config_parse_cgroup,           "CGROUP [...]" },
+                { config_parse_deps,             "UNIT [...]" },
+                { config_parse_names,            "UNIT [...]" },
+                { config_parse_exec,             "PATH [ARGUMENT [...]]" },
+                { config_parse_service_type,     "SERVICETYPE" },
+                { config_parse_service_restart,  "SERVICERESTART" },
+                { config_parse_sysv_priority,    "SYSVPRIORITY" },
+                { config_parse_kill_mode,        "KILLMODE" },
+                { config_parse_listen,           "SOCKET [...]" },
+                { config_parse_socket_bind,      "SOCKETBIND" },
+                { config_parse_bindtodevice,     "NETWORKINTERFACE" },
+                { config_parse_usec,             "SECONDS" },
+                { config_parse_path_strv,        "PATH [...]" },
+                { config_parse_mount_flags,      "MOUNTFLAG [...]" },
+                { config_parse_description,      "DESCRIPTION" },
+        };
+
+        assert(f);
+        assert(items);
+
+        for (i = items; i->lvalue; i++) {
+                unsigned j;
+                const char *rvalue = "OTHER";
+
+                if (!streq_ptr(i->section, prev_section)) {
+                        if (!not_first)
+                                not_first = true;
+                        else
+                                fputc('\n', f);
+
+                        fprintf(f, "[%s]\n", i->section);
+                        prev_section = i->section;
+                }
+
+                for (j = 0; j < ELEMENTSOF(table); j++)
+                        if (i->parse == table[j].callback) {
+                                rvalue = table[j].rvalue;
+                                break;
+                        }
+
+                fprintf(f, "%s=%s\n", i->lvalue, rvalue);
+        }
+}
+
+static int load_from_path(Unit *u, const char *path) {
+
+        static const char* const section_table[_UNIT_TYPE_MAX] = {
+                [UNIT_SERVICE]   = "Service",
+                [UNIT_TIMER]     = "Timer",
+                [UNIT_SOCKET]    = "Socket",
+                [UNIT_TARGET]    = "Target",
+                [UNIT_DEVICE]    = "Device",
+                [UNIT_MOUNT]     = "Mount",
+                [UNIT_AUTOMOUNT] = "Automount",
+                [UNIT_SNAPSHOT]  = "Snapshot",
+                [UNIT_SWAP]      = "Swap"
+        };
+
+#define EXEC_CONTEXT_CONFIG_ITEMS(context, section) \
+                { "WorkingDirectory",       config_parse_path,            &(context).working_directory,                    section   }, \
+                { "RootDirectory",          config_parse_path,            &(context).root_directory,                       section   }, \
+                { "User",                   config_parse_string,          &(context).user,                                 section   }, \
+                { "Group",                  config_parse_string,          &(context).group,                                section   }, \
+                { "SupplementaryGroups",    config_parse_strv,            &(context).supplementary_groups,                 section   }, \
+                { "Nice",                   config_parse_nice,            &(context),                                      section   }, \
+                { "OOMAdjust",              config_parse_oom_adjust,      &(context),                                      section   }, \
+                { "IOSchedulingClass",      config_parse_io_class,        &(context),                                      section   }, \
+                { "IOSchedulingPriority",   config_parse_io_priority,     &(context),                                      section   }, \
+                { "CPUSchedulingPolicy",    config_parse_cpu_sched_policy,&(context),                                      section   }, \
+                { "CPUSchedulingPriority",  config_parse_cpu_sched_prio,  &(context),                                      section   }, \
+                { "CPUSchedulingResetOnFork", config_parse_bool,          &(context).cpu_sched_reset_on_fork,              section   }, \
+                { "CPUAffinity",            config_parse_cpu_affinity,    &(context),                                      section   }, \
+                { "UMask",                  config_parse_mode,            &(context).umask,                                section   }, \
+                { "Environment",            config_parse_strv,            &(context).environment,                          section   }, \
+                { "StandardInput",          config_parse_input,           &(context).std_input,                            section   }, \
+                { "StandardOutput",         config_parse_output,          &(context).std_output,                           section   }, \
+                { "StandardError",          config_parse_output,          &(context).std_output,                           section   }, \
+                { "TTYPath",                config_parse_path,            &(context).tty_path,                             section   }, \
+                { "SyslogIdentifier",       config_parse_string,          &(context).syslog_identifier,                    section   }, \
+                { "SyslogFacility",         config_parse_facility,        &(context).syslog_priority,                      section   }, \
+                { "SyslogLevel",            config_parse_level,           &(context).syslog_priority,                      section   }, \
+                { "SyslogNoPrefix",         config_parse_bool,            &(context).syslog_no_prefix,                     section   }, \
+                { "Capabilities",           config_parse_capabilities,    &(context),                                      section   }, \
+                { "SecureBits",             config_parse_secure_bits,     &(context),                                      section   }, \
+                { "CapabilityBoundingSetDrop", config_parse_bounding_set, &(context),                                      section   }, \
+                { "TimerSlackNS",           config_parse_timer_slack_ns,  &(context),                                      section   }, \
+                { "LimitCPU",               config_parse_limit,           &(context).rlimit[RLIMIT_CPU],                   section   }, \
+                { "LimitFSIZE",             config_parse_limit,           &(context).rlimit[RLIMIT_FSIZE],                 section   }, \
+                { "LimitDATA",              config_parse_limit,           &(context).rlimit[RLIMIT_DATA],                  section   }, \
+                { "LimitSTACK",             config_parse_limit,           &(context).rlimit[RLIMIT_STACK],                 section   }, \
+                { "LimitCORE",              config_parse_limit,           &(context).rlimit[RLIMIT_CORE],                  section   }, \
+                { "LimitRSS",               config_parse_limit,           &(context).rlimit[RLIMIT_RSS],                   section   }, \
+                { "LimitNOFILE",            config_parse_limit,           &(context).rlimit[RLIMIT_NOFILE],                section   }, \
+                { "LimitAS",                config_parse_limit,           &(context).rlimit[RLIMIT_AS],                    section   }, \
+                { "LimitNPROC",             config_parse_limit,           &(context).rlimit[RLIMIT_NPROC],                 section   }, \
+                { "LimitMEMLOCK",           config_parse_limit,           &(context).rlimit[RLIMIT_MEMLOCK],               section   }, \
+                { "LimitLOCKS",             config_parse_limit,           &(context).rlimit[RLIMIT_LOCKS],                 section   }, \
+                { "LimitSIGPENDING",        config_parse_limit,           &(context).rlimit[RLIMIT_SIGPENDING],            section   }, \
+                { "LimitMSGQUEUE",          config_parse_limit,           &(context).rlimit[RLIMIT_MSGQUEUE],              section   }, \
+                { "LimitNICE",              config_parse_limit,           &(context).rlimit[RLIMIT_NICE],                  section   }, \
+                { "LimitRTPRIO",            config_parse_limit,           &(context).rlimit[RLIMIT_RTPRIO],                section   }, \
+                { "LimitRTTIME",            config_parse_limit,           &(context).rlimit[RLIMIT_RTTIME],                section   }, \
+                { "ControlGroup",           config_parse_cgroup,          u,                                               section   }, \
+                { "ReadWriteDirectories",   config_parse_path_strv,       &(context).read_write_dirs,                      section   }, \
+                { "ReadOnlyDirectories",    config_parse_path_strv,       &(context).read_only_dirs,                       section   }, \
+                { "InaccessibleDirectories",config_parse_path_strv,       &(context).inaccessible_dirs,                    section   }, \
+                { "PrivateTmp",             config_parse_bool,            &(context).private_tmp,                          section   }, \
+                { "MountFlags",             config_parse_mount_flags,     &(context),                                      section   }
+
+        const ConfigItem items[] = {
+                { "Names",                  config_parse_names,           u,                                               "Unit"    },
+                { "Description",            config_parse_description,     u,                                               "Unit"    },
+                { "Requires",               config_parse_deps,            UINT_TO_PTR(UNIT_REQUIRES),                      "Unit"    },
+                { "RequiresOverridable",    config_parse_deps,            UINT_TO_PTR(UNIT_REQUIRES_OVERRIDABLE),          "Unit"    },
+                { "Requisite",              config_parse_deps,            UINT_TO_PTR(UNIT_REQUISITE),                     "Unit"    },
+                { "RequisiteOverridable",   config_parse_deps,            UINT_TO_PTR(UNIT_REQUISITE_OVERRIDABLE),         "Unit"    },
+                { "Wants",                  config_parse_deps,            UINT_TO_PTR(UNIT_WANTS),                         "Unit"    },
+                { "Conflicts",              config_parse_deps,            UINT_TO_PTR(UNIT_CONFLICTS),                     "Unit"    },
+                { "Before",                 config_parse_deps,            UINT_TO_PTR(UNIT_BEFORE),                        "Unit"    },
+                { "After",                  config_parse_deps,            UINT_TO_PTR(UNIT_AFTER),                         "Unit"    },
+                { "RecursiveStop",          config_parse_bool,            &u->meta.recursive_stop,                         "Unit"    },
+                { "StopWhenUnneeded",       config_parse_bool,            &u->meta.stop_when_unneeded,                     "Unit"    },
+
+                { "PIDFile",                config_parse_path,            &u->service.pid_file,                            "Service" },
+                { "ExecStartPre",           config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START_PRE,  "Service" },
+                { "ExecStart",              config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START,      "Service" },
+                { "ExecStartPost",          config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START_POST, "Service" },
+                { "ExecReload",             config_parse_exec,            u->service.exec_command+SERVICE_EXEC_RELOAD,     "Service" },
+                { "ExecStop",               config_parse_exec,            u->service.exec_command+SERVICE_EXEC_STOP,       "Service" },
+                { "ExecStopPost",           config_parse_exec,            u->service.exec_command+SERVICE_EXEC_STOP_POST,  "Service" },
+                { "RestartSec",             config_parse_usec,            &u->service.restart_usec,                        "Service" },
+                { "TimeoutSec",             config_parse_usec,            &u->service.timeout_usec,                        "Service" },
+                { "Type",                   config_parse_service_type,    &u->service.type,                                "Service" },
+                { "Restart",                config_parse_service_restart, &u->service.restart,                             "Service" },
+                { "PermissionsStartOnly",   config_parse_bool,            &u->service.permissions_start_only,              "Service" },
+                { "RootDirectoryStartOnly", config_parse_bool,            &u->service.root_directory_start_only,           "Service" },
+                { "ValidNoProcess",         config_parse_bool,            &u->service.valid_no_process,                    "Service" },
+                { "SysVStartPriority",      config_parse_sysv_priority,   &u->service.sysv_start_priority,                 "Service" },
+                { "KillMode",               config_parse_kill_mode,       &u->service.kill_mode,                           "Service" },
+                { "NonBlocking",            config_parse_bool,            &u->service.exec_context.non_blocking,           "Service" },
+                { "BusName",                config_parse_string,          &u->service.bus_name,                            "Service" },
+                EXEC_CONTEXT_CONFIG_ITEMS(u->service.exec_context, "Service"),
+
+                { "ListenStream",           config_parse_listen,          &u->socket,                                      "Socket"  },
+                { "ListenDatagram",         config_parse_listen,          &u->socket,                                      "Socket"  },
+                { "ListenSequentialPacket", config_parse_listen,          &u->socket,                                      "Socket"  },
+                { "ListenFIFO",             config_parse_listen,          &u->socket,                                      "Socket"  },
+                { "BindIPv6Only",           config_parse_socket_bind,     &u->socket,                                      "Socket"  },
+                { "Backlog",                config_parse_unsigned,        &u->socket.backlog,                              "Socket"  },
+                { "BindToDevice",           config_parse_bindtodevice,    &u->socket,                                      "Socket"  },
+                { "ExecStartPre",           config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_START_PRE,    "Socket"  },
+                { "ExecStartPost",          config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_START_POST,   "Socket"  },
+                { "ExecStopPre",            config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_STOP_PRE,     "Socket"  },
+                { "ExecStopPost",           config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_STOP_POST,    "Socket"  },
+                { "TimeoutSec",             config_parse_usec,            &u->socket.timeout_usec,                         "Socket"  },
+                { "DirectoryMode",          config_parse_mode,            &u->socket.directory_mode,                       "Socket"  },
+                { "SocketMode",             config_parse_mode,            &u->socket.socket_mode,                          "Socket"  },
+                { "KillMode",               config_parse_kill_mode,       &u->socket.kill_mode,                            "Socket"  },
+                { "Accept",                 config_parse_bool,            &u->socket.accept,                               "Socket"  },
+                EXEC_CONTEXT_CONFIG_ITEMS(u->socket.exec_context, "Socket"),
+
+                { "What",                   config_parse_string,          &u->mount.parameters_fragment.what,              "Mount"   },
+                { "Where",                  config_parse_path,            &u->mount.where,                                 "Mount"   },
+                { "Options",                config_parse_string,          &u->mount.parameters_fragment.options,           "Mount"   },
+                { "Type",                   config_parse_string,          &u->mount.parameters_fragment.fstype,            "Mount"   },
+                { "TimeoutSec",             config_parse_usec,            &u->mount.timeout_usec,                          "Mount"   },
+                { "KillMode",               config_parse_kill_mode,       &u->mount.kill_mode,                             "Mount"   },
+                EXEC_CONTEXT_CONFIG_ITEMS(u->mount.exec_context, "Mount"),
+
+                { "Where",                  config_parse_path,            &u->automount.where,                             "Automount" },
+
+                { "What",                   config_parse_path,            &u->swap.parameters_fragment.what,               "Swap" },
+                { "Priority",               config_parse_int,             &u->swap.parameters_fragment.priority,           "Swap" },
+
+                { NULL, NULL, NULL, NULL }
+        };
+
+#undef EXEC_CONTEXT_CONFIG_ITEMS
+
+        const char *sections[3];
+        char *k;
+        int r;
+        Set *symlink_names;
+        FILE *f = NULL;
+        char *filename = NULL, *id = NULL;
+        Unit *merged;
+
+        if (!u) {
+                /* Dirty dirty hack. */
+                dump_items((FILE*) path, items);
+                return 0;
+        }
+
+        assert(u);
+        assert(path);
+
+        sections[0] = "Unit";
+        sections[1] = section_table[u->meta.type];
+        sections[2] = NULL;
+
+        if (!(symlink_names = set_new(string_hash_func, string_compare_func)))
+                return -ENOMEM;
+
+        if (path_is_absolute(path)) {
+
+                if (!(filename = strdup(path))) {
+                        r = -ENOMEM;
+                        goto finish;
+                }
+
+                if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
+                        free(filename);
+                        filename = NULL;
+
+                        if (r != -ENOENT)
+                                goto finish;
+                }
+
+        } else  {
+                char **p;
+
+                STRV_FOREACH(p, u->meta.manager->unit_path) {
+
+                        /* Instead of opening the path right away, we manually
+                         * follow all symlinks and add their name to our unit
+                         * name set while doing so */
+                        if (!(filename = path_make_absolute(path, *p))) {
+                                r = -ENOMEM;
+                                goto finish;
+                        }
+
+                        if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
+                                char *sn;
+
+                                free(filename);
+                                filename = NULL;
+
+                                if (r != -ENOENT)
+                                        goto finish;
+
+                                /* Empty the symlink names for the next run */
+                                while ((sn = set_steal_first(symlink_names)))
+                                        free(sn);
+
+                                continue;
+                        }
+
+                        break;
+                }
+        }
+
+        if (!filename) {
+                r = 0;
+                goto finish;
+        }
+
+        merged = u;
+        if ((r = merge_by_names(&merged, symlink_names, id)) < 0)
+                goto finish;
+
+        if (merged != u) {
+                u->meta.load_state = UNIT_MERGED;
+                r = 0;
+                goto finish;
+        }
+
+        /* Now, parse the file contents */
+        if ((r = config_parse(filename, f, sections, items, u)) < 0)
+                goto finish;
+
+        free(u->meta.fragment_path);
+        u->meta.fragment_path = filename;
+        filename = NULL;
+
+        u->meta.load_state = UNIT_LOADED;
+        r = 0;
+
+finish:
+        while ((k = set_steal_first(symlink_names)))
+                free(k);
+
+        set_free(symlink_names);
+        free(filename);
+
+        if (f)
+                fclose(f);
+
+        return r;
+}
+
+int unit_load_fragment(Unit *u) {
+        int r;
+
+        assert(u);
+
+        if (u->meta.fragment_path) {
+
+                if ((r = load_from_path(u, u->meta.fragment_path)) < 0)
+                        return r;
+
+        } else {
+                Iterator i;
+                const char *t;
+
+                /* Try to find the unit under its id */
+                if ((r = load_from_path(u, u->meta.id)) < 0)
+                        return r;
+
+                /* Try to find an alias we can load this with */
+                if (u->meta.load_state == UNIT_STUB)
+                        SET_FOREACH(t, u->meta.names, i) {
+
+                                if (t == u->meta.id)
+                                        continue;
+
+                                if ((r = load_from_path(u, t)) < 0)
+                                        return r;
+
+                                if (u->meta.load_state != UNIT_STUB)
+                                        break;
+                        }
+
+                /* Now, follow the same logic, but look for a template */
+                if (u->meta.load_state == UNIT_STUB && u->meta.instance) {
+                        char *k;
+
+                        if (!(k = unit_name_template(u->meta.id)))
+                                return -ENOMEM;
+
+                        r = load_from_path(u, k);
+                        free(k);
+
+                        if (r < 0)
+                                return r;
+
+                        if (u->meta.load_state == UNIT_STUB)
+                                SET_FOREACH(t, u->meta.names, i) {
+
+                                        if (t == u->meta.id)
+                                                continue;
+
+                                        if (!(k = unit_name_template(t)))
+                                                return -ENOMEM;
+
+                                        r = load_from_path(u, k);
+                                        free(k);
+
+                                        if (r < 0)
+                                                return r;
+
+                                        if (u->meta.load_state != UNIT_STUB)
+                                                break;
+                                }
+                }
+        }
+
+        return 0;
+}
+
+void unit_dump_config_items(FILE *f) {
+        /* OK, this wins a prize for extreme ugliness. */
+
+        load_from_path(NULL, (const void*) f);
+}