/*-*- 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 .
***/
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#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;
}
path_kill_slashes(p->path);
} 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) {
Socket *s;
SocketAddressBindIPv6Only b;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
s = (Socket*) data;
if ((b = socket_address_bind_ipv6_only_from_string(rvalue)) < 0) {
int r;
if ((r = parse_boolean(rvalue)) < 0) {
log_error("[%s:%u] Failed to parse bind IPv6 only value: %s", filename, line, rvalue);
return -EBADMSG;
}
s->bind_ipv6_only = r ? SOCKET_ADDRESS_IPV6_ONLY : SOCKET_ADDRESS_BOTH;
} else
s->bind_ipv6_only = b;
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, *path = NULL;
bool honour_argv0, write_to_path;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
/* We accept an absolute path as first argument, or
* alternatively an absolute prefixed with @ to allow
* overriding of argv[0]. */
honour_argv0 = rvalue[0] == '@';
if (rvalue[honour_argv0 ? 1 : 0] != '/') {
log_error("[%s:%u] Invalid executable path in command line: %s", filename, line, rvalue);
return -EINVAL;
}
k = 0;
FOREACH_WORD_QUOTED(w, l, rvalue, state)
k++;
if (!(n = new(char*, k + (honour_argv0 ? 0 : 1))))
return -ENOMEM;
k = 0;
write_to_path = honour_argv0;
FOREACH_WORD_QUOTED(w, l, rvalue, state) {
if (write_to_path) {
if (!(path = strndup(w+1, l-1)))
goto fail;
write_to_path = false;
} else {
if (!(n[k++] = strndup(w, l)))
goto fail;
}
}
n[k] = NULL;
if (!n[0]) {
log_error("[%s:%u] Invalid command line: %s", filename, line, rvalue);
strv_free(n);
return -EINVAL;
}
if (!path)
if (!(path = strdup(n[0])))
goto fail;
assert(path_is_absolute(path));
if (!(nce = new0(ExecCommand, 1)))
goto fail;
nce->argv = n;
nce->path = path;
path_kill_slashes(nce->path);
exec_command_append_list(e, nce);
return 0;
fail:
n[k] = NULL;
strv_free(n);
free(path);
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;
}
static int config_parse_timer(
const char *filename,
unsigned line,
const char *section,
const char *lvalue,
const char *rvalue,
void *data,
void *userdata) {
Timer *t = data;
usec_t u;
int r;
TimerValue *v;
TimerBase b;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
if ((b = timer_base_from_string(lvalue)) < 0) {
log_error("[%s:%u] Failed to parse timer base: %s", filename, line, lvalue);
return -EINVAL;
}
if ((r = parse_usec(rvalue, &u)) < 0) {
log_error("[%s:%u] Failed to parse timer value: %s", filename, line, rvalue);
return r;
}
if (!(v = new0(TimerValue, 1)))
return -ENOMEM;
v->base = b;
v->value = u;
LIST_PREPEND(TimerValue, value, t->values, v);
return 0;
}
static int config_parse_timer_unit(
const char *filename,
unsigned line,
const char *section,
const char *lvalue,
const char *rvalue,
void *data,
void *userdata) {
Timer *t = data;
int r;
if (endswith(rvalue, ".timer")) {
log_error("[%s:%u] Unit cannot be of type timer: %s", filename, line, rvalue);
return -EINVAL;
}
if ((r = manager_load_unit(t->meta.manager, rvalue, NULL, &t->unit)) < 0) {
log_error("[%s:%u] Failed to load unit: %s", filename, line, rvalue);
return r;
}
return 0;
}
static int config_parse_path_spec(
const char *filename,
unsigned line,
const char *section,
const char *lvalue,
const char *rvalue,
void *data,
void *userdata) {
Path *p = data;
PathSpec *s;
PathType b;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
if ((b = path_type_from_string(lvalue)) < 0) {
log_error("[%s:%u] Failed to parse path type: %s", filename, line, lvalue);
return -EINVAL;
}
if (!path_is_absolute(rvalue)) {
log_error("[%s:%u] Path is not absolute: %s", filename, line, rvalue);
return -EINVAL;
}
if (!(s = new0(PathSpec, 1)))
return -ENOMEM;
if (!(s->path = strdup(rvalue))) {
free(s);
return -ENOMEM;
}
path_kill_slashes(s->path);
s->type = b;
s->inotify_fd = -1;
LIST_PREPEND(PathSpec, spec, p->specs, s);
return 0;
}
static int config_parse_path_unit(
const char *filename,
unsigned line,
const char *section,
const char *lvalue,
const char *rvalue,
void *data,
void *userdata) {
Path *t = data;
int r;
if (endswith(rvalue, ".path")) {
log_error("[%s:%u] Unit cannot be of type path: %s", filename, line, rvalue);
return -EINVAL;
}
if ((r = manager_load_unit(t->meta.manager, rvalue, NULL, &t->unit)) < 0) {
log_error("[%s:%u] Failed to load unit: %s", filename, line, rvalue);
return r;
}
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, *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_and_make_absolute(*filename, &target)) < 0)
return r;
free(*filename);
*filename = target;
}
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" },
{ config_parse_timer, "TIMER" },
{ config_parse_timer_unit, "NAME" },
};
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",
[UNIT_PATH] = "Path"
};
#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_error, 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 }, \
{ "TCPWrapName", config_parse_string, &(context).tcpwrap_name, 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" },
{ "OnlyByDependency", config_parse_bool, &u->meta.only_by_dependency, "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" },
{ "OnActive", config_parse_timer, &u->timer, "Timer" },
{ "OnBoot", config_parse_timer, &u->timer, "Timer" },
{ "OnStartup", config_parse_timer, &u->timer, "Timer" },
{ "OnUnitActive", config_parse_timer, &u->timer, "Timer" },
{ "OnUnitInactive", config_parse_timer, &u->timer, "Timer" },
{ "Unit", config_parse_timer_unit, &u->timer, "Timer" },
{ "PathExists", config_parse_path_spec, &u->path, "Path" },
{ "PathChanged", config_parse_path_spec, &u->path, "Path" },
{ "DirectoryNotEmpty", config_parse_path_spec, &u->path, "Path" },
{ "Unit", config_parse_path_unit, &u->path, "Path" },
/* The [Install] section is ignored here. */
{ "Alias", NULL, NULL, "Install" },
{ "WantedBy", NULL, NULL, "Install" },
{ "Also", NULL, NULL, "Install" },
{ NULL, NULL, NULL, NULL }
};
#undef EXEC_CONTEXT_CONFIG_ITEMS
const char *sections[4];
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] = "Install";
sections[3] = 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->lookup_paths.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, false, 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:
set_free_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);
}