/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2010 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <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 <sys/stat.h> #include <sys/time.h> #include <sys/resource.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" #include "bus-errors.h" #ifndef HAVE_SYSV_COMPAT int config_parse_warn_compat( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { log_debug("[%s:%u] Support for option %s= has been disabled at compile time and is ignored", filename, line, lvalue); return 0; } #endif int config_parse_unit_deps( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { UnitDependency d = ltype; Unit *u = userdata; char *w; size_t l; char *state; assert(filename); assert(lvalue); assert(rvalue); FOREACH_WORD_QUOTED(w, l, rvalue, state) { char *t, *k; int r; t = strndup(w, l); if (!t) 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); if (r < 0) log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", filename, line, k, strerror(-r)); free(k); } return 0; } int config_parse_unit_names( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, 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_QUOTED(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); if (r < 0) { log_error("Failed to add name %s, ignoring: %s", k, strerror(-r)); free(k); return 0; } free(k); } return 0; } int config_parse_unit_string_printf( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Unit *u = userdata; char **s = data; char *k; assert(filename); assert(lvalue); assert(rvalue); assert(s); assert(u); if (!(k = unit_full_printf(u, rvalue))) return -ENOMEM; free(*s); if (*k) *s = k; else { free(k); *s = NULL; } return 0; } int config_parse_unit_strv_printf( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Unit *u = userdata; char *k; int r; assert(filename); assert(lvalue); assert(rvalue); assert(u); k = unit_full_printf(u, rvalue); if (!k) return -ENOMEM; r = config_parse_strv(filename, line, section, lvalue, ltype, k, data, userdata); free(k); return r; } int config_parse_unit_path_printf( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Unit *u = userdata; char **s = data; char *k; assert(filename); assert(lvalue); assert(rvalue); assert(s); assert(u); if (!(k = unit_full_printf(u, rvalue))) return -ENOMEM; if (!path_is_absolute(k)) { log_error("[%s:%u] Not an absolute path: %s", filename, line, k); free(k); return -EINVAL; } path_kill_slashes(k); free(*s); *s = k; return 0; } int config_parse_socket_listen( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { SocketPort *p, *tail; 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 = unit_full_printf(UNIT(s), rvalue))) { free(p); return -ENOMEM; } path_kill_slashes(p->path); } else if (streq(lvalue, "ListenSpecial")) { p->type = SOCKET_SPECIAL; if (!(p->path = unit_full_printf(UNIT(s), rvalue))) { free(p); return -ENOMEM; } path_kill_slashes(p->path); } else if (streq(lvalue, "ListenMessageQueue")) { p->type = SOCKET_MQUEUE; if (!(p->path = unit_full_printf(UNIT(s), rvalue))) { free(p); return -ENOMEM; } path_kill_slashes(p->path); } else if (streq(lvalue, "ListenNetlink")) { char *k; int r; p->type = SOCKET_SOCKET; k = unit_full_printf(UNIT(s), rvalue); r = socket_address_parse_netlink(&p->address, k); free(k); if (r < 0) { log_error("[%s:%u] Failed to parse address value, ignoring: %s", filename, line, rvalue); free(p); return 0; } } else { char *k; int r; p->type = SOCKET_SOCKET; k = unit_full_printf(UNIT(s), rvalue); r = socket_address_parse(&p->address, k); free(k); if (r < 0) { log_error("[%s:%u] Failed to parse address value, ignoring: %s", filename, line, rvalue); free(p); return 0; } 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) { log_error("[%s:%u] Address family not supported, ignoring: %s", filename, line, rvalue); free(p); return 0; } } p->fd = -1; if (s->ports) { LIST_FIND_TAIL(SocketPort, port, s->ports, tail); LIST_INSERT_AFTER(SocketPort, port, s->ports, tail, p); } else LIST_PREPEND(SocketPort, port, s->ports, p); return 0; } int config_parse_socket_bind( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, 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, ignoring: %s", filename, line, rvalue); return 0; } s->bind_ipv6_only = r ? SOCKET_ADDRESS_IPV6_ONLY : SOCKET_ADDRESS_BOTH; } else s->bind_ipv6_only = b; return 0; } int config_parse_exec_nice( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { ExecContext *c = data; int priority; assert(filename); assert(lvalue); assert(rvalue); assert(data); if (safe_atoi(rvalue, &priority) < 0) { log_error("[%s:%u] Failed to parse nice priority, ignoring: %s. ", filename, line, rvalue); return 0; } if (priority < PRIO_MIN || priority >= PRIO_MAX) { log_error("[%s:%u] Nice priority out of range, ignoring: %s", filename, line, rvalue); return 0; } c->nice = priority; c->nice_set = true; return 0; } int config_parse_exec_oom_score_adjust( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { ExecContext *c = data; int oa; assert(filename); assert(lvalue); assert(rvalue); assert(data); if (safe_atoi(rvalue, &oa) < 0) { log_error("[%s:%u] Failed to parse the OOM score adjust value, ignoring: %s", filename, line, rvalue); return 0; } if (oa < OOM_SCORE_ADJ_MIN || oa > OOM_SCORE_ADJ_MAX) { log_error("[%s:%u] OOM score adjust value out of range, ignoring: %s", filename, line, rvalue); return 0; } c->oom_score_adjust = oa; c->oom_score_adjust_set = true; return 0; } int config_parse_exec( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { ExecCommand **e = data, *nce; char *path, **n; unsigned k; assert(filename); assert(lvalue); assert(rvalue); assert(e); /* We accept an absolute path as first argument, or * alternatively an absolute prefixed with @ to allow * overriding of argv[0]. */ e += ltype; for (;;) { char *w; size_t l; char *state; bool honour_argv0 = false, ignore = false; path = NULL; nce = NULL; n = NULL; rvalue += strspn(rvalue, WHITESPACE); if (rvalue[0] == 0) break; if (rvalue[0] == '-') { ignore = true; rvalue ++; } if (rvalue[0] == '@') { honour_argv0 = true; rvalue ++; } if (*rvalue != '/') { log_error("[%s:%u] Invalid executable path in command line, ignoring: %s", filename, line, rvalue); return 0; } k = 0; FOREACH_WORD_QUOTED(w, l, rvalue, state) { if (strncmp(w, ";", MAX(l, 1U)) == 0) break; k++; } if (!(n = new(char*, k + !honour_argv0))) return -ENOMEM; k = 0; FOREACH_WORD_QUOTED(w, l, rvalue, state) { if (strncmp(w, ";", MAX(l, 1U)) == 0) break; if (honour_argv0 && w == rvalue) { assert(!path); if (!(path = cunescape_length(w, l))) goto fail; } else { if (!(n[k++] = cunescape_length(w, l))) goto fail; } } n[k] = NULL; if (!n[0]) { log_error("[%s:%u] Invalid command line, ignoring: %s", filename, line, rvalue); strv_free(n); free(path); return 0; } 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; nce->ignore = ignore; path_kill_slashes(nce->path); exec_command_append_list(e, nce); rvalue = state; } return 0; fail: n[k] = NULL; strv_free(n); free(path); free(nce); return -ENOMEM; } 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"); int config_parse_socket_bindtodevice( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, 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"); int config_parse_facility( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { int *o = data, x; assert(filename); assert(lvalue); assert(rvalue); assert(data); if ((x = log_facility_unshifted_from_string(rvalue)) < 0) { log_error("[%s:%u] Failed to parse log facility, ignoring: %s", filename, line, rvalue); return 0; } *o = (x << 3) | LOG_PRI(*o); return 0; } int config_parse_level( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, 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, ignoring: %s", filename, line, rvalue); return 0; } *o = (*o & LOG_FACMASK) | x; return 0; } int config_parse_exec_io_class( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, 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, ignoring: %s", filename, line, rvalue); return 0; } c->ioprio = IOPRIO_PRIO_VALUE(x, IOPRIO_PRIO_DATA(c->ioprio)); c->ioprio_set = true; return 0; } int config_parse_exec_io_priority( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, 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, ignoring: %s", filename, line, rvalue); return 0; } c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_PRIO_CLASS(c->ioprio), i); c->ioprio_set = true; return 0; } int config_parse_exec_cpu_sched_policy( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, 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, ignoring: %s", filename, line, rvalue); return 0; } c->cpu_sched_policy = x; c->cpu_sched_set = true; return 0; } int config_parse_exec_cpu_sched_prio( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, 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, ignoring: %s", filename, line, rvalue); return 0; } c->cpu_sched_priority = i; c->cpu_sched_set = true; return 0; } int config_parse_exec_cpu_affinity( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, 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_QUOTED(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 (!(c->cpuset)) if (!(c->cpuset = cpu_set_malloc(&c->cpuset_ncpus))) return -ENOMEM; if (r < 0 || cpu >= c->cpuset_ncpus) { log_error("[%s:%u] Failed to parse CPU affinity, ignoring: %s", filename, line, rvalue); return 0; } CPU_SET_S(cpu, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset); } return 0; } int config_parse_exec_capabilities( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, 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, ignoring: %s", filename, line, rvalue); return 0; } if (c->capabilities) cap_free(c->capabilities); c->capabilities = cap; return 0; } int config_parse_exec_secure_bits( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, 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_QUOTED(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, ignoring: %s", filename, line, rvalue); return 0; } } return 0; } int config_parse_exec_bounding_set( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { ExecContext *c = data; char *w; size_t l; char *state; bool invert = false; uint64_t sum = 0; assert(filename); assert(lvalue); assert(rvalue); assert(data); if (rvalue[0] == '~') { invert = true; rvalue++; } /* Note that we store this inverted internally, since the * kernel wants it like this. But we actually expose it * non-inverted everywhere to have a fully normalized * interface. */ FOREACH_WORD_QUOTED(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, ignoring: %s", filename, line, rvalue); return 0; } sum |= ((uint64_t) 1ULL) << (uint64_t) cap; } if (invert) c->capability_bounding_set_drop |= sum; else c->capability_bounding_set_drop |= ~sum; return 0; } int config_parse_exec_timer_slack_nsec( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { ExecContext *c = data; unsigned long u; assert(filename); assert(lvalue); assert(rvalue); assert(data); if (safe_atolu(rvalue, &u) < 0) { log_error("[%s:%u] Failed to parse time slack value, ignoring: %s", filename, line, rvalue); return 0; } c->timer_slack_nsec = u; return 0; } int config_parse_limit( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { struct rlimit **rl = data; unsigned long long u; assert(filename); assert(lvalue); assert(rvalue); assert(data); rl += ltype; if (streq(rvalue, "infinity")) u = (unsigned long long) RLIM_INFINITY; else if (safe_atollu(rvalue, &u) < 0) { log_error("[%s:%u] Failed to parse resource value, ignoring: %s", filename, line, rvalue); return 0; } if (!*rl) if (!(*rl = new(struct rlimit, 1))) return -ENOMEM; (*rl)->rlim_cur = (*rl)->rlim_max = (rlim_t) u; return 0; } int config_parse_unit_cgroup( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Unit *u = userdata; char *w; size_t l; char *state; FOREACH_WORD_QUOTED(w, l, rvalue, state) { char *t, *k; int r; t = strndup(w, l); if (!t) return -ENOMEM; k = unit_full_printf(u, t); free(t); if (!k) return -ENOMEM; t = cunescape(k); free(k); if (!t) return -ENOMEM; r = unit_add_cgroup_from_text(u, t); free(t); if (r < 0) { log_error("[%s:%u] Failed to parse cgroup value, ignoring: %s", filename, line, rvalue); return 0; } } return 0; } #ifdef HAVE_SYSV_COMPAT int config_parse_sysv_priority( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { int *priority = data; int i; assert(filename); assert(lvalue); assert(rvalue); assert(data); if (safe_atoi(rvalue, &i) < 0 || i < 0) { log_error("[%s:%u] Failed to parse SysV start priority, ignoring: %s", filename, line, rvalue); return 0; } *priority = (int) i; return 0; } #endif int config_parse_fsck_passno( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { int *passno = data; int i; assert(filename); assert(lvalue); assert(rvalue); assert(data); if (safe_atoi(rvalue, &i) || i < 0) { log_error("[%s:%u] Failed to parse fsck pass number, ignoring: %s", filename, line, rvalue); return 0; } *passno = (int) i; return 0; } DEFINE_CONFIG_PARSE_ENUM(config_parse_kill_mode, kill_mode, KillMode, "Failed to parse kill mode"); int config_parse_kill_signal( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { int *sig = data; int r; assert(filename); assert(lvalue); assert(rvalue); assert(sig); if ((r = signal_from_string_try_harder(rvalue)) <= 0) { log_error("[%s:%u] Failed to parse kill signal, ignoring: %s", filename, line, rvalue); return 0; } *sig = r; return 0; } int config_parse_exec_mount_flags( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, 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_QUOTED(w, l, rvalue, state) { if (strncmp(w, "shared", MAX(l, 6U)) == 0) flags |= MS_SHARED; else if (strncmp(w, "slave", MAX(l, 5U)) == 0) flags |= MS_SLAVE; else if (strncmp(w, "private", MAX(l, 7U)) == 0) flags |= MS_PRIVATE; else { log_error("[%s:%u] Failed to parse mount flags, ignoring: %s", filename, line, rvalue); return 0; } } c->mount_flags = flags; return 0; } int config_parse_timer( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Timer *t = data; usec_t u; 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, ignoring: %s", filename, line, lvalue); return 0; } if (parse_usec(rvalue, &u) < 0) { log_error("[%s:%u] Failed to parse timer value, ignoring: %s", filename, line, rvalue); return 0; } if (!(v = new0(TimerValue, 1))) return -ENOMEM; v->base = b; v->value = u; LIST_PREPEND(TimerValue, value, t->values, v); return 0; } int config_parse_timer_unit( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Timer *t = data; int r; DBusError error; Unit *u; assert(filename); assert(lvalue); assert(rvalue); assert(data); dbus_error_init(&error); if (endswith(rvalue, ".timer")) { log_error("[%s:%u] Unit cannot be of type timer, ignoring: %s", filename, line, rvalue); return 0; } r = manager_load_unit(UNIT(t)->manager, rvalue, NULL, NULL, &u); if (r < 0) { log_error("[%s:%u] Failed to load unit %s, ignoring: %s", filename, line, rvalue, bus_error(&error, r)); dbus_error_free(&error); return 0; } unit_ref_set(&t->unit, u); return 0; } int config_parse_path_spec( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, 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, ignoring: %s", filename, line, lvalue); return 0; } if (!path_is_absolute(rvalue)) { log_error("[%s:%u] Path is not absolute, ignoring: %s", filename, line, rvalue); return 0; } 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; } int config_parse_path_unit( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Path *t = data; int r; DBusError error; Unit *u; assert(filename); assert(lvalue); assert(rvalue); assert(data); dbus_error_init(&error); if (endswith(rvalue, ".path")) { log_error("[%s:%u] Unit cannot be of type path, ignoring: %s", filename, line, rvalue); return 0; } if ((r = manager_load_unit(UNIT(t)->manager, rvalue, NULL, &error, &u)) < 0) { log_error("[%s:%u] Failed to load unit %s, ignoring: %s", filename, line, rvalue, bus_error(&error, r)); dbus_error_free(&error); return 0; } unit_ref_set(&t->unit, u); return 0; } int config_parse_socket_service( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Socket *s = data; int r; DBusError error; Unit *x; assert(filename); assert(lvalue); assert(rvalue); assert(data); dbus_error_init(&error); if (!endswith(rvalue, ".service")) { log_error("[%s:%u] Unit must be of type service, ignoring: %s", filename, line, rvalue); return 0; } r = manager_load_unit(UNIT(s)->manager, rvalue, NULL, &error, &x); if (r < 0) { log_error("[%s:%u] Failed to load unit %s, ignoring: %s", filename, line, rvalue, bus_error(&error, r)); dbus_error_free(&error); return 0; } unit_ref_set(&s->service, x); return 0; } int config_parse_service_sockets( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Service *s = data; int r; char *state, *w; size_t l; assert(filename); assert(lvalue); assert(rvalue); assert(data); FOREACH_WORD_QUOTED(w, l, rvalue, state) { char *t, *k; t = strndup(w, l); if (!t) return -ENOMEM; k = unit_name_printf(UNIT(s), t); free(t); if (!k) return -ENOMEM; if (!endswith(k, ".socket")) { log_error("[%s:%u] Unit must be of type socket, ignoring: %s", filename, line, rvalue); free(k); continue; } r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_WANTS, UNIT_AFTER, k, NULL, true); if (r < 0) log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", filename, line, k, strerror(-r)); r = unit_add_dependency_by_name(UNIT(s), UNIT_TRIGGERED_BY, k, NULL, true); if (r < 0) return r; free(k); } return 0; } int config_parse_unit_env_file( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { char ***env = data, **k; Unit *u = userdata; char *s; assert(filename); assert(lvalue); assert(rvalue); assert(data); s = unit_full_printf(u, rvalue); if (!s) return -ENOMEM; if (!path_is_absolute(s[0] == '-' ? s + 1 : s)) { log_error("[%s:%u] Path '%s' is not absolute, ignoring.", filename, line, s); free(s); return 0; } k = strv_append(*env, s); free(s); if (!k) return -ENOMEM; strv_free(*env); *env = k; return 0; } int config_parse_ip_tos( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { int *ip_tos = data, x; assert(filename); assert(lvalue); assert(rvalue); assert(data); if ((x = ip_tos_from_string(rvalue)) < 0) if (safe_atoi(rvalue, &x) < 0) { log_error("[%s:%u] Failed to parse IP TOS value, ignoring: %s", filename, line, rvalue); return 0; } *ip_tos = x; return 0; } int config_parse_unit_condition_path( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { ConditionType cond = ltype; Unit *u = data; bool trigger, negate; Condition *c; assert(filename); assert(lvalue); assert(rvalue); assert(data); trigger = rvalue[0] == '|'; if (trigger) rvalue++; negate = rvalue[0] == '!'; if (negate) rvalue++; if (!path_is_absolute(rvalue)) { log_error("[%s:%u] Path in condition not absolute, ignoring: %s", filename, line, rvalue); return 0; } c = condition_new(cond, rvalue, trigger, negate); if (!c) return -ENOMEM; LIST_PREPEND(Condition, conditions, u->conditions, c); return 0; } int config_parse_unit_condition_string( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { ConditionType cond = ltype; Unit *u = data; bool trigger, negate; Condition *c; assert(filename); assert(lvalue); assert(rvalue); assert(data); if ((trigger = rvalue[0] == '|')) rvalue++; if ((negate = rvalue[0] == '!')) rvalue++; if (!(c = condition_new(cond, rvalue, trigger, negate))) return -ENOMEM; LIST_PREPEND(Condition, conditions, u->conditions, c); return 0; } int config_parse_unit_condition_null( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Unit *u = data; Condition *c; bool trigger, negate; int b; assert(filename); assert(lvalue); assert(rvalue); assert(data); if ((trigger = rvalue[0] == '|')) rvalue++; if ((negate = rvalue[0] == '!')) rvalue++; if ((b = parse_boolean(rvalue)) < 0) { log_error("[%s:%u] Failed to parse boolean value in condition, ignoring: %s", filename, line, rvalue); return 0; } if (!b) negate = !negate; if (!(c = condition_new(CONDITION_NULL, NULL, trigger, negate))) return -ENOMEM; LIST_PREPEND(Condition, conditions, u->conditions, c); return 0; } DEFINE_CONFIG_PARSE_ENUM(config_parse_notify_access, notify_access, NotifyAccess, "Failed to parse notify access specifier"); int config_parse_unit_cgroup_attr( const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Unit *u = data; char **l; int r; assert(filename); assert(lvalue); assert(rvalue); assert(data); l = strv_split_quoted(rvalue); if (!l) return -ENOMEM; if (strv_length(l) != 2) { log_error("[%s:%u] Failed to parse cgroup attribute value, ignoring: %s", filename, line, rvalue); strv_free(l); return 0; } r = unit_add_cgroup_attribute(u, NULL, l[0], l[1], NULL); strv_free(l); if (r < 0) { log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue); return 0; } return 0; } int config_parse_unit_cpu_shares(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Unit *u = data; int r; unsigned long ul; char *t; assert(filename); assert(lvalue); assert(rvalue); assert(data); if (safe_atolu(rvalue, &ul) < 0 || ul < 1) { log_error("[%s:%u] Failed to parse CPU shares value, ignoring: %s", filename, line, rvalue); return 0; } if (asprintf(&t, "%lu", ul) < 0) return -ENOMEM; r = unit_add_cgroup_attribute(u, "cpu", "cpu.shares", t, NULL); free(t); if (r < 0) { log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue); return 0; } return 0; } int config_parse_unit_memory_limit(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Unit *u = data; int r; off_t sz; char *t; assert(filename); assert(lvalue); assert(rvalue); assert(data); if (parse_bytes(rvalue, &sz) < 0 || sz <= 0) { log_error("[%s:%u] Failed to parse memory limit value, ignoring: %s", filename, line, rvalue); return 0; } if (asprintf(&t, "%llu", (unsigned long long) sz) < 0) return -ENOMEM; r = unit_add_cgroup_attribute(u, "memory", streq(lvalue, "MemorySoftLimit") ? "memory.soft_limit_in_bytes" : "memory.limit_in_bytes", t, NULL); free(t); if (r < 0) { log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue); return 0; } return 0; } static int device_map(const char *controller, const char *name, const char *value, char **ret) { char **l; assert(controller); assert(name); assert(value); assert(ret); l = strv_split_quoted(value); if (!l) return -ENOMEM; assert(strv_length(l) >= 1); if (streq(l[0], "*")) { if (asprintf(ret, "a *:*%s%s", isempty(l[1]) ? "" : " ", strempty(l[1])) < 0) { strv_free(l); return -ENOMEM; } } else { struct stat st; if (stat(l[0], &st) < 0) { log_warning("Couldn't stat device %s", l[0]); strv_free(l); return -errno; } if (!S_ISCHR(st.st_mode) && !S_ISBLK(st.st_mode)) { log_warning("%s is not a device.", l[0]); strv_free(l); return -ENODEV; } if (asprintf(ret, "%c %u:%u%s%s", S_ISCHR(st.st_mode) ? 'c' : 'b', major(st.st_rdev), minor(st.st_rdev), isempty(l[1]) ? "" : " ", strempty(l[1])) < 0) { strv_free(l); return -ENOMEM; } } strv_free(l); return 0; } int config_parse_unit_device_allow(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Unit *u = data; char **l; int r; unsigned k; assert(filename); assert(lvalue); assert(rvalue); assert(data); l = strv_split_quoted(rvalue); if (!l) return -ENOMEM; k = strv_length(l); if (k < 1 || k > 2) { log_error("[%s:%u] Failed to parse device value, ignoring: %s", filename, line, rvalue); strv_free(l); return 0; } if (!streq(l[0], "*") && !path_startswith(l[0], "/dev")) { log_error("[%s:%u] Device node path not absolute, ignoring: %s", filename, line, rvalue); strv_free(l); return 0; } if (!isempty(l[1]) && !in_charset(l[1], "rwm")) { log_error("[%s:%u] Device access string invalid, ignoring: %s", filename, line, rvalue); strv_free(l); return 0; } strv_free(l); r = unit_add_cgroup_attribute(u, "devices", streq(lvalue, "DeviceAllow") ? "devices.allow" : "devices.deny", rvalue, device_map); if (r < 0) { log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue); return 0; } return 0; } static int blkio_map(const char *controller, const char *name, const char *value, char **ret) { struct stat st; char **l; dev_t d; assert(controller); assert(name); assert(value); assert(ret); l = strv_split_quoted(value); if (!l) return -ENOMEM; assert(strv_length(l) == 2); if (stat(l[0], &st) < 0) { log_warning("Couldn't stat device %s", l[0]); strv_free(l); return -errno; } if (S_ISBLK(st.st_mode)) d = st.st_rdev; else if (major(st.st_dev) != 0) { /* If this is not a device node then find the block * device this file is stored on */ d = st.st_dev; /* If this is a partition, try to get the originating * block device */ block_get_whole_disk(d, &d); } else { log_warning("%s is not a block device and file system block device cannot be determined or is not local.", l[0]); strv_free(l); return -ENODEV; } if (asprintf(ret, "%u:%u %s", major(d), minor(d), l[1]) < 0) { strv_free(l); return -ENOMEM; } strv_free(l); return 0; } int config_parse_unit_blkio_weight(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Unit *u = data; int r; unsigned long ul; const char *device = NULL, *weight; unsigned k; char *t, **l; assert(filename); assert(lvalue); assert(rvalue); assert(data); l = strv_split_quoted(rvalue); if (!l) return -ENOMEM; k = strv_length(l); if (k < 1 || k > 2) { log_error("[%s:%u] Failed to parse weight value, ignoring: %s", filename, line, rvalue); strv_free(l); return 0; } if (k == 1) weight = l[0]; else { device = l[0]; weight = l[1]; } if (device && !path_is_absolute(device)) { log_error("[%s:%u] Failed to parse block device node value, ignoring: %s", filename, line, rvalue); strv_free(l); return 0; } if (safe_atolu(weight, &ul) < 0 || ul < 10 || ul > 1000) { log_error("[%s:%u] Failed to parse block IO weight value, ignoring: %s", filename, line, rvalue); strv_free(l); return 0; } if (device) r = asprintf(&t, "%s %lu", device, ul); else r = asprintf(&t, "%lu", ul); strv_free(l); if (r < 0) return -ENOMEM; if (device) r = unit_add_cgroup_attribute(u, "blkio", "blkio.weight_device", t, blkio_map); else r = unit_add_cgroup_attribute(u, "blkio", "blkio.weight", t, NULL); free(t); if (r < 0) { log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue); return 0; } return 0; } int config_parse_unit_blkio_bandwidth(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { Unit *u = data; int r; off_t bytes; unsigned k; char *t, **l; assert(filename); assert(lvalue); assert(rvalue); assert(data); l = strv_split_quoted(rvalue); if (!l) return -ENOMEM; k = strv_length(l); if (k != 2) { log_error("[%s:%u] Failed to parse bandwidth value, ignoring: %s", filename, line, rvalue); strv_free(l); return 0; } if (!path_is_absolute(l[0])) { log_error("[%s:%u] Failed to parse block device node value, ignoring: %s", filename, line, rvalue); strv_free(l); return 0; } if (parse_bytes(l[1], &bytes) < 0 || bytes <= 0) { log_error("[%s:%u] Failed to parse block IO bandwith value, ignoring: %s", filename, line, rvalue); strv_free(l); return 0; } r = asprintf(&t, "%s %llu", l[0], (unsigned long long) bytes); strv_free(l); if (r < 0) return -ENOMEM; r = unit_add_cgroup_attribute(u, "blkio", streq(lvalue, "BlockIOReadBandwidth") ? "blkio.read_bps_device" : "blkio.write_bps_device", t, blkio_map); free(t); if (r < 0) { log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue); return 0; } 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, but only if it is a valid * unit name. */ name = file_name_from_path(*filename); if (unit_name_is_valid(name, true)) { id = set_get(names, name); if (!id) { id = strdup(name); if (!id) return -ENOMEM; r = set_put(names, id); if (r < 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, "re"))) { 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)->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 int load_from_path(Unit *u, const char *path) { int r; Set *symlink_names; FILE *f = NULL; char *filename = NULL, *id = NULL; Unit *merged; struct stat st; assert(u); assert(path); symlink_names = set_new(string_hash_func, string_compare_func); if (!symlink_names) 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->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 (u->manager->unit_path_cache && !set_get(u->manager->unit_path_cache, filename)) r = -ENOENT; else r = open_follow(&filename, &f, symlink_names, &id); if (r < 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) { /* Hmm, no suitable file found? */ r = 0; goto finish; } merged = u; if ((r = merge_by_names(&merged, symlink_names, id)) < 0) goto finish; if (merged != u) { u->load_state = UNIT_MERGED; r = 0; goto finish; } zero(st); if (fstat(fileno(f), &st) < 0) { r = -errno; goto finish; } if (null_or_empty(&st)) u->load_state = UNIT_MASKED; else { /* Now, parse the file contents */ r = config_parse(filename, f, UNIT_VTABLE(u)->sections, config_item_perf_lookup, (void*) load_fragment_gperf_lookup, false, u); if (r < 0) goto finish; u->load_state = UNIT_LOADED; } free(u->fragment_path); u->fragment_path = filename; filename = NULL; u->fragment_mtime = timespec_load(&st.st_mtim); r = 0; finish: set_free_free(symlink_names); free(filename); if (f) fclose(f); return r; } int unit_load_fragment(Unit *u) { int r; Iterator i; const char *t; assert(u); assert(u->load_state == UNIT_STUB); assert(u->id); /* First, try to find the unit under its id. We always look * for unit files in the default directories, to make it easy * to override things by placing things in /etc/systemd/system */ if ((r = load_from_path(u, u->id)) < 0) return r; /* Try to find an alias we can load this with */ if (u->load_state == UNIT_STUB) SET_FOREACH(t, u->names, i) { if (t == u->id) continue; if ((r = load_from_path(u, t)) < 0) return r; if (u->load_state != UNIT_STUB) break; } /* And now, try looking for it under the suggested (originally linked) path */ if (u->load_state == UNIT_STUB && u->fragment_path) { if ((r = load_from_path(u, u->fragment_path)) < 0) return r; if (u->load_state == UNIT_STUB) { /* Hmm, this didn't work? Then let's get rid * of the fragment path stored for us, so that * we don't point to an invalid location. */ free(u->fragment_path); u->fragment_path = NULL; } } /* Look for a template */ if (u->load_state == UNIT_STUB && u->instance) { char *k; if (!(k = unit_name_template(u->id))) return -ENOMEM; r = load_from_path(u, k); free(k); if (r < 0) return r; if (u->load_state == UNIT_STUB) SET_FOREACH(t, u->names, i) { if (t == u->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->load_state != UNIT_STUB) break; } } return 0; } void unit_dump_config_items(FILE *f) { static const struct { const 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_unit_path_printf, "PATH" }, { config_parse_strv, "STRING [...]" }, { config_parse_exec_nice, "NICE" }, { config_parse_exec_oom_score_adjust, "OOMSCOREADJUST" }, { config_parse_exec_io_class, "IOCLASS" }, { config_parse_exec_io_priority, "IOPRIORITY" }, { config_parse_exec_cpu_sched_policy, "CPUSCHEDPOLICY" }, { config_parse_exec_cpu_sched_prio, "CPUSCHEDPRIO" }, { config_parse_exec_cpu_affinity, "CPUAFFINITY" }, { config_parse_mode, "MODE" }, { config_parse_unit_env_file, "FILE" }, { config_parse_output, "OUTPUT" }, { config_parse_input, "INPUT" }, { config_parse_facility, "FACILITY" }, { config_parse_level, "LEVEL" }, { config_parse_exec_capabilities, "CAPABILITIES" }, { config_parse_exec_secure_bits, "SECUREBITS" }, { config_parse_exec_bounding_set, "BOUNDINGSET" }, { config_parse_exec_timer_slack_nsec, "TIMERSLACK" }, { config_parse_limit, "LIMIT" }, { config_parse_unit_cgroup, "CGROUP [...]" }, { config_parse_unit_deps, "UNIT [...]" }, { config_parse_unit_names, "UNIT [...]" }, { config_parse_exec, "PATH [ARGUMENT [...]]" }, { config_parse_service_type, "SERVICETYPE" }, { config_parse_service_restart, "SERVICERESTART" }, #ifdef HAVE_SYSV_COMPAT { config_parse_sysv_priority, "SYSVPRIORITY" }, #else { config_parse_warn_compat, "NOTSUPPORTED" }, #endif { config_parse_kill_mode, "KILLMODE" }, { config_parse_kill_signal, "SIGNAL" }, { config_parse_socket_listen, "SOCKET [...]" }, { config_parse_socket_bind, "SOCKETBIND" }, { config_parse_socket_bindtodevice, "NETWORKINTERFACE" }, { config_parse_usec, "SECONDS" }, { config_parse_path_strv, "PATH [...]" }, { config_parse_exec_mount_flags, "MOUNTFLAG [...]" }, { config_parse_unit_string_printf, "STRING" }, { config_parse_timer, "TIMER" }, { config_parse_timer_unit, "NAME" }, { config_parse_path_spec, "PATH" }, { config_parse_path_unit, "UNIT" }, { config_parse_notify_access, "ACCESS" }, { config_parse_ip_tos, "TOS" }, { config_parse_unit_condition_path, "CONDITION" }, { config_parse_unit_condition_string, "CONDITION" }, { config_parse_unit_condition_null, "CONDITION" }, }; const char *prev = NULL; const char *i; assert(f); NULSTR_FOREACH(i, load_fragment_gperf_nulstr) { const char *rvalue = "OTHER", *lvalue; unsigned j; size_t prefix_len; const char *dot; const ConfigPerfItem *p; assert_se(p = load_fragment_gperf_lookup(i, strlen(i))); dot = strchr(i, '.'); lvalue = dot ? dot + 1 : i; prefix_len = dot-i; if (dot) if (!prev || strncmp(prev, i, prefix_len+1) != 0) { if (prev) fputc('\n', f); fprintf(f, "[%.*s]\n", (int) prefix_len, i); } for (j = 0; j < ELEMENTSOF(table); j++) if (p->parse == table[j].callback) { rvalue = table[j].rvalue; break; } fprintf(f, "%s=%s\n", lvalue, rvalue); prev = i; } }