695 lines
23 KiB
C
695 lines
23 KiB
C
/*-*- Mode: C; c-basic-offset: 8 -*-*/
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#include <linux/oom.h>
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#include <assert.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include "unit.h"
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#include "strv.h"
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#include "conf-parser.h"
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#include "load-fragment.h"
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#include "log.h"
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static int config_parse_deps(
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const char *filename,
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unsigned line,
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const char *section,
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const char *lvalue,
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const char *rvalue,
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void *data,
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void *userdata) {
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UnitDependency d = PTR_TO_UINT(data);
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Unit *u = userdata;
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char *w;
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size_t l;
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char *state;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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FOREACH_WORD(w, &l, rvalue, state) {
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char *t;
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int r;
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Unit *other;
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if (!(t = strndup(w, l)))
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return -ENOMEM;
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r = manager_load_unit(u->meta.manager, t, &other);
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free(t);
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if (r < 0)
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return r;
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if ((r = unit_add_dependency(u, d, other)) < 0)
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return r;
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}
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return 0;
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}
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static int config_parse_names(
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const char *filename,
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unsigned line,
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const char *section,
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const char *lvalue,
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const char *rvalue,
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void *data,
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void *userdata) {
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Unit *u = userdata;
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char *w;
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size_t l;
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char *state;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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FOREACH_WORD(w, &l, rvalue, state) {
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char *t;
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int r;
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Unit *other;
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if (!(t = strndup(w, l)))
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return -ENOMEM;
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other = manager_get_unit(u->meta.manager, t);
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if (other) {
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if (other != u) {
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if (other->meta.load_state != UNIT_STUB) {
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free(t);
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return -EEXIST;
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}
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if ((r = unit_merge(u, other)) < 0) {
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free(t);
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return r;
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}
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}
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} else {
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if ((r = unit_add_name(u, t)) < 0) {
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free(t);
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return r;
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}
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}
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free(t);
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}
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return 0;
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}
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static int config_parse_listen(
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const char *filename,
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unsigned line,
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const char *section,
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const char *lvalue,
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const char *rvalue,
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void *data,
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void *userdata) {
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int r;
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SocketPort *p;
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Socket *s;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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s = (Socket*) data;
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if (!(p = new0(SocketPort, 1)))
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return -ENOMEM;
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if (streq(lvalue, "ListenFIFO")) {
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p->type = SOCKET_FIFO;
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if (!(p->path = strdup(rvalue))) {
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free(p);
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return -ENOMEM;
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}
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} else {
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p->type = SOCKET_SOCKET;
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if ((r = socket_address_parse(&p->address, rvalue)) < 0) {
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log_error("[%s:%u] Failed to parse address value: %s", filename, line, rvalue);
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free(p);
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return r;
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}
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if (streq(lvalue, "ListenStream"))
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p->address.type = SOCK_STREAM;
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else if (streq(lvalue, "ListenDatagram"))
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p->address.type = SOCK_DGRAM;
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else {
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assert(streq(lvalue, "ListenSequentialPacket"));
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p->address.type = SOCK_SEQPACKET;
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}
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if (socket_address_family(&p->address) != AF_LOCAL && p->address.type == SOCK_SEQPACKET) {
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free(p);
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return -EPROTONOSUPPORT;
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}
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}
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p->fd = -1;
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LIST_PREPEND(SocketPort, port, s->ports, p);
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return 0;
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}
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static int config_parse_socket_bind(
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const char *filename,
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unsigned line,
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const char *section,
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const char *lvalue,
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const char *rvalue,
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void *data,
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void *userdata) {
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int r;
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Socket *s;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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s = (Socket*) data;
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if ((r = parse_boolean(rvalue)) < 0) {
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log_error("[%s:%u] Failed to parse bind IPv6 only value: %s", filename, line, rvalue);
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return r;
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}
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s->bind_ipv6_only = r ? SOCKET_ADDRESS_IPV6_ONLY : SOCKET_ADDRESS_BOTH;
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return 0;
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}
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static int config_parse_nice(
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const char *filename,
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unsigned line,
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const char *section,
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const char *lvalue,
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const char *rvalue,
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void *data,
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void *userdata) {
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int *i = data, priority, r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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if ((r = safe_atoi(rvalue, &priority)) < 0) {
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log_error("[%s:%u] Failed to parse nice priority: %s", filename, line, rvalue);
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return r;
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}
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if (priority < PRIO_MIN || priority >= PRIO_MAX) {
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log_error("[%s:%u] Nice priority out of range: %s", filename, line, rvalue);
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return -ERANGE;
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}
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*i = priority;
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return 0;
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}
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static int config_parse_oom_adjust(
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const char *filename,
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unsigned line,
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const char *section,
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const char *lvalue,
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const char *rvalue,
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void *data,
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void *userdata) {
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int *i = data, oa, r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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if ((r = safe_atoi(rvalue, &oa)) < 0) {
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log_error("[%s:%u] Failed to parse OOM adjust value: %s", filename, line, rvalue);
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return r;
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}
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if (oa < OOM_DISABLE || oa > OOM_ADJUST_MAX) {
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log_error("[%s:%u] OOM adjust value out of range: %s", filename, line, rvalue);
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return -ERANGE;
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}
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*i = oa;
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return 0;
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}
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static int config_parse_umask(
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const char *filename,
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unsigned line,
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const char *section,
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const char *lvalue,
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const char *rvalue,
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void *data,
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void *userdata) {
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mode_t *m = data;
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long l;
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char *x = NULL;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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errno = 0;
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l = strtol(rvalue, &x, 8);
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if (!x || *x || errno) {
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log_error("[%s:%u] Failed to parse umask value: %s", filename, line, rvalue);
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return errno ? -errno : -EINVAL;
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}
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if (l < 0000 || l > 0777) {
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log_error("[%s:%u] umask value out of range: %s", filename, line, rvalue);
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return -ERANGE;
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}
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*m = (mode_t) l;
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return 0;
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}
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static int config_parse_exec(
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const char *filename,
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unsigned line,
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const char *section,
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const char *lvalue,
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const char *rvalue,
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void *data,
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void *userdata) {
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ExecCommand **e = data, *ee, *nce = NULL;
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char **n;
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char *w;
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unsigned k;
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size_t l;
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char *state;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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k = 0;
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FOREACH_WORD_QUOTED(w, l, rvalue, state)
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k++;
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if (!(n = new(char*, k+1)))
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return -ENOMEM;
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k = 0;
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FOREACH_WORD_QUOTED(w, l, rvalue, state)
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if (!(n[k++] = strndup(w, l)))
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goto fail;
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n[k] = NULL;
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if (!n[0] || !path_is_absolute(n[0])) {
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log_error("[%s:%u] Invalid executable path in command line: %s", filename, line, rvalue);
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strv_free(n);
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return -EINVAL;
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}
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if (!(nce = new0(ExecCommand, 1)))
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goto fail;
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nce->argv = n;
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if (!(nce->path = strdup(n[0])))
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goto fail;
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if (*e) {
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/* It's kinda important that we keep the order here */
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LIST_FIND_TAIL(ExecCommand, command, *e, ee);
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LIST_INSERT_AFTER(ExecCommand, command, *e, ee, nce);
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} else
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*e = nce;
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return 0;
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fail:
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for (; k > 0; k--)
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free(n[k-1]);
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free(n);
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free(nce);
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return -ENOMEM;
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}
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static int config_parse_usec(
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const char *filename,
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unsigned line,
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const char *section,
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const char *lvalue,
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const char *rvalue,
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void *data,
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void *userdata) {
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usec_t *usec = data;
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unsigned long long u;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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if ((r = safe_atollu(rvalue, &u)) < 0) {
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log_error("[%s:%u] Failed to parse time value: %s", filename, line, rvalue);
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return r;
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}
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/* We actually assume the user configures seconds. Later on we
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* might choose to support suffixes for time values, to
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* configure bigger or smaller units */
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*usec = u * USEC_PER_SEC;
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return 0;
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}
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static int config_parse_service_type(
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const char *filename,
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unsigned line,
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const char *section,
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const char *lvalue,
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const char *rvalue,
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void *data,
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void *userdata) {
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Service *s = data;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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if (streq(rvalue, "forking"))
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s->type = SERVICE_FORKING;
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else if (streq(rvalue, "simple"))
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s->type = SERVICE_SIMPLE;
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else {
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log_error("[%s:%u] Failed to parse service type: %s", filename, line, rvalue);
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return -EBADMSG;
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}
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return 0;
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}
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static int config_parse_service_restart(
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const char *filename,
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unsigned line,
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const char *section,
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const char *lvalue,
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const char *rvalue,
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void *data,
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void *userdata) {
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Service *s = data;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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if (streq(rvalue, "once"))
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s->restart = SERVICE_ONCE;
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else if (streq(rvalue, "on-success"))
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s->type = SERVICE_RESTART_ON_SUCCESS;
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else if (streq(rvalue, "always"))
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s->type = SERVICE_RESTART_ALWAYS;
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else {
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log_error("[%s:%u] Failed to parse service type: %s", filename, line, rvalue);
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return -EBADMSG;
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}
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return 0;
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}
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#define FOLLOW_MAX 8
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static char *build_path(const char *path, const char *filename) {
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char *e, *r;
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size_t k;
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assert(path);
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assert(filename);
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/* This removes the last component of path and appends
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* filename, unless the latter is absolute anyway or the
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* former isn't */
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if (path_is_absolute(filename))
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return strdup(filename);
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if (!(e = strrchr(path, '/')))
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return strdup(filename);
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k = strlen(filename);
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if (!(r = new(char, e-path+1+k+1)))
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return NULL;
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memcpy(r, path, e-path+1);
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memcpy(r+(e-path)+1, filename, k+1);
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return r;
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}
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static int open_follow(char **filename, FILE **_f, Set *names, char **_id) {
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unsigned c = 0;
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int fd, r;
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FILE *f;
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char *id = NULL;
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assert(filename);
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assert(*filename);
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assert(_f);
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assert(names);
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/* This will update the filename pointer if the loaded file is
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* reached by a symlink. The old string will be freed. */
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for (;;) {
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char *target, *k, *name;
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if (c++ >= FOLLOW_MAX)
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return -ELOOP;
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/* Add the file name we are currently looking at to
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* the names of this unit */
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name = file_name_from_path(*filename);
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if (!(id = set_get(names, name))) {
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if (!(id = strdup(name)))
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return -ENOMEM;
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if ((r = set_put(names, id)) < 0) {
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free(id);
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return r;
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}
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}
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/* Try to open the file name, but don't if its a symlink */
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if ((fd = open(*filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW)) >= 0)
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break;
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if (errno != ELOOP)
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return -errno;
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/* Hmm, so this is a symlink. Let's read the name, and follow it manually */
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if ((r = readlink_malloc(*filename, &target)) < 0)
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return r;
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k = build_path(*filename, target);
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free(target);
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if (!k)
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return -ENOMEM;
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free(*filename);
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*filename = k;
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}
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if (!(f = fdopen(fd, "r"))) {
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r = -errno;
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assert(close_nointr(fd) == 0);
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return r;
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}
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*_f = f;
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*_id = id;
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return 0;
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}
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static int load_from_path(Unit *u, const char *path) {
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static const char* const section_table[_UNIT_TYPE_MAX] = {
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[UNIT_SERVICE] = "Service",
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[UNIT_TIMER] = "Timer",
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[UNIT_SOCKET] = "Socket",
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[UNIT_TARGET] = "Target",
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[UNIT_DEVICE] = "Device",
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[UNIT_MOUNT] = "Mount",
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[UNIT_AUTOMOUNT] = "Automount",
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[UNIT_SNAPSHOT] = "Snapshot"
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};
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#define EXEC_CONTEXT_CONFIG_ITEMS(context, section) \
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{ "Directory", config_parse_path, &(context).directory, section }, \
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{ "User", config_parse_string, &(context).user, section }, \
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{ "Group", config_parse_string, &(context).group, section }, \
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{ "SupplementaryGroups", config_parse_strv, &(context).supplementary_groups, section }, \
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{ "Nice", config_parse_nice, &(context).nice, section }, \
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{ "OOMAdjust", config_parse_oom_adjust, &(context).oom_adjust, section }, \
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{ "UMask", config_parse_umask, &(context).umask, section }, \
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{ "Environment", config_parse_strv, &(context).environment, section }
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const ConfigItem items[] = {
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{ "Names", config_parse_names, u, "Meta" },
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{ "Description", config_parse_string, &u->meta.description, "Meta" },
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{ "Requires", config_parse_deps, UINT_TO_PTR(UNIT_REQUIRES), "Meta" },
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{ "SoftRequires", config_parse_deps, UINT_TO_PTR(UNIT_SOFT_REQUIRES), "Meta" },
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{ "Wants", config_parse_deps, UINT_TO_PTR(UNIT_WANTS), "Meta" },
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{ "Requisite", config_parse_deps, UINT_TO_PTR(UNIT_REQUISITE), "Meta" },
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{ "SoftRequisite", config_parse_deps, UINT_TO_PTR(UNIT_SOFT_REQUISITE), "Meta" },
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{ "Conflicts", config_parse_deps, UINT_TO_PTR(UNIT_CONFLICTS), "Meta" },
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{ "Before", config_parse_deps, UINT_TO_PTR(UNIT_BEFORE), "Meta" },
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{ "After", config_parse_deps, UINT_TO_PTR(UNIT_AFTER), "Meta" },
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{ "PIDFile", config_parse_path, &u->service.pid_file, "Service" },
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{ "ExecStartPre", config_parse_exec, &u->service.exec_command[SERVICE_EXEC_START_PRE], "Service" },
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{ "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, "Service" },
|
|
{ "Restart", config_parse_service_restart, &u->service, "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" },
|
|
{ "ExecStartPre", config_parse_exec, &u->service.exec_command[SOCKET_EXEC_START_PRE], "Socket" },
|
|
{ "ExecStartPost", config_parse_exec, &u->service.exec_command[SOCKET_EXEC_START_POST], "Socket" },
|
|
{ "ExecStopPre", config_parse_exec, &u->service.exec_command[SOCKET_EXEC_STOP_PRE], "Socket" },
|
|
{ "ExecStopPost", config_parse_exec, &u->service.exec_command[SOCKET_EXEC_STOP_POST], "Socket" },
|
|
EXEC_CONTEXT_CONFIG_ITEMS(u->socket.exec_context, "Socket"),
|
|
|
|
EXEC_CONTEXT_CONFIG_ITEMS(u->automount.exec_context, "Automount"),
|
|
|
|
{ NULL, NULL, NULL, NULL }
|
|
};
|
|
|
|
#undef EXEC_CONTEXT_CONFIG_ITEMS
|
|
|
|
const char *sections[3];
|
|
char *k;
|
|
int r;
|
|
Set *symlink_names;
|
|
FILE *f;
|
|
char *filename, *id;
|
|
|
|
sections[0] = "Meta";
|
|
sections[1] = section_table[u->meta.type];
|
|
sections[2] = NULL;
|
|
|
|
if (!(symlink_names = set_new(string_hash_func, string_compare_func)))
|
|
return -ENOMEM;
|
|
|
|
/* 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, unit_path()))) {
|
|
r = -ENOMEM;
|
|
goto finish;
|
|
}
|
|
|
|
if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
|
|
if (r == -ENOENT)
|
|
r = 0; /* returning 0 means: no suitable config file found */
|
|
|
|
goto finish;
|
|
}
|
|
|
|
/* Now, parse the file contents */
|
|
r = config_parse(filename, f, sections, items, u);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
/* Let's try to add in all symlink names we found */
|
|
while ((k = set_steal_first(symlink_names))) {
|
|
if ((r = unit_add_name(u, k)) < 0)
|
|
goto finish;
|
|
|
|
if (id == k)
|
|
assert_se(u->meta.id = set_get(u->meta.names, k));
|
|
|
|
free(k);
|
|
}
|
|
|
|
free(u->meta.load_path);
|
|
u->meta.load_path = filename;
|
|
filename = NULL;
|
|
|
|
r = 1; /* returning 1 means: suitable config file found and loaded */
|
|
|
|
finish:
|
|
while ((k = set_steal_first(symlink_names)))
|
|
free(k);
|
|
set_free(symlink_names);
|
|
free(filename);
|
|
|
|
return r;
|
|
}
|
|
|
|
int unit_load_fragment(Unit *u) {
|
|
int r = -ENOENT;
|
|
|
|
assert(u);
|
|
assert(u->meta.load_state == UNIT_STUB);
|
|
|
|
if (u->meta.load_path)
|
|
r = load_from_path(u, u->meta.load_path);
|
|
else {
|
|
Iterator i;
|
|
char *t;
|
|
|
|
/* Try to find a name we can load this with */
|
|
SET_FOREACH(t, u->meta.names, i)
|
|
if ((r = load_from_path(u, t)) != 0)
|
|
return r;
|
|
}
|
|
|
|
return r;
|
|
}
|