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execute: load environment files at time of execution, not when we load the service configuration 

https://bugzilla.redhat.com/show_bug.cgi?id=661282
This commit is contained in:
Lennart Poettering 2011-03-04 03:44:43 +01:00
parent 0595f9a1c1
commit 8c7be95e5a
9 changed files with 269 additions and 116 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
TODO
View File

@ -8,15 +8,14 @@ F15:
* finish syslog socket stuff
* load EnvironmentFile= when starting services, not when reloading configuration
https://bugzilla.redhat.com/show_bug.cgi?id=661282
* NFS, networkmanager ordering issue
* add fstab fields to add wait timeouts, change Wants to Requires by local-fs.target
* hook emergency.target into local-fs.target in some way as OnFailure with isolate
* s/seperate/separate/
Features:
* introduce "x-systemd-automount" as alternative to the "comment=systemd.automount" mount option

33
src/dbus-execute.c
View File

@ -33,6 +33,39 @@ DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_execute_append_kill_mode, kill_mode, KillMod
DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_execute_append_input, exec_input, ExecInput);
DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_execute_append_output, exec_output, ExecOutput);
int bus_execute_append_env_files(Manager *m, DBusMessageIter *i, const char *property, void *data) {
char **env_files = data, **j;
DBusMessageIter sub, sub2;
assert(m);
assert(i);
assert(property);
if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(sb)", &sub))
return -ENOMEM;
STRV_FOREACH(j, env_files) {
dbus_bool_t b = false;
char *fn = *j;
if (fn[0] == '-') {
b = true;
fn++;
}
if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &fn) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_BOOLEAN, &b) ||
!dbus_message_iter_close_container(&sub, &sub2))
return -ENOMEM;
}
if (!dbus_message_iter_close_container(i, &sub))
return -ENOMEM;
return 0;
}
int bus_execute_append_oom_score_adjust(Manager *m, DBusMessageIter *i, const char *property, void *data) {
ExecContext *c = data;
int32_t n;

2
src/dbus-execute.h
View File

@ -93,6 +93,7 @@
#define BUS_EXEC_CONTEXT_PROPERTIES(interface, context) \
{ interface, "Environment", bus_property_append_strv, "as", (context).environment }, \
{ interface, "EnvironmentFiles", bus_execute_append_env_files, "a(sb)", (context).environment_files }, \
{ interface, "UMask", bus_property_append_mode, "u", &(context).umask }, \
{ interface, "LimitCPU", bus_execute_append_rlimits, "t", &(context) }, \
{ interface, "LimitFSIZE", bus_execute_append_rlimits, "t", &(context) }, \
@ -169,5 +170,6 @@ int bus_execute_append_capabilities(Manager *m, DBusMessageIter *i, const char *
int bus_execute_append_rlimits(Manager *m, DBusMessageIter *i, const char *property, void *data);
int bus_execute_append_command(Manager *m, DBusMessageIter *u, const char *property, void *data);
int bus_execute_append_kill_mode(Manager *m, DBusMessageIter *i, const char *property, void *data);
int bus_execute_append_env_files(Manager *m, DBusMessageIter *i, const char *property, void *data);
#endif

184
src/execute.c
View File

@ -919,6 +919,7 @@ int exec_spawn(ExecCommand *command,
int r;
char *line;
int socket_fd;
char **files_env = NULL;
assert(command);
assert(context);
@ -939,21 +940,30 @@ int exec_spawn(ExecCommand *command,
} else
socket_fd = -1;
if ((r = exec_context_load_environment(context, &files_env)) < 0) {
log_error("Failed to load environment files: %s", strerror(-r));
return r;
}
if (!argv)
argv = command->argv;
if (!(line = exec_command_line(argv)))
return -ENOMEM;
if (!(line = exec_command_line(argv))) {
r = -ENOMEM;
goto fail_parent;
}
log_debug("About to execute: %s", line);
free(line);
if (cgroup_bondings)
if ((r = cgroup_bonding_realize_list(cgroup_bondings)))
return r;
goto fail_parent;
if ((pid = fork()) < 0)
return -errno;
if ((pid = fork()) < 0) {
r = -errno;
goto fail_parent;
}
if (pid == 0) {
int i;
@ -983,7 +993,7 @@ int exec_spawn(ExecCommand *command,
if (sigemptyset(&ss) < 0 ||
sigprocmask(SIG_SETMASK, &ss, NULL) < 0) {
r = EXIT_SIGNAL_MASK;
goto fail;
goto fail_child;
}
/* Close sockets very early to make sure we don't
@ -992,26 +1002,26 @@ int exec_spawn(ExecCommand *command,
if (close_all_fds(socket_fd >= 0 ? &socket_fd : fds,
socket_fd >= 0 ? 1 : n_fds) < 0) {
r = EXIT_FDS;
goto fail;
goto fail_child;
}
if (!context->same_pgrp)
if (setsid() < 0) {
r = EXIT_SETSID;
goto fail;
goto fail_child;
}
if (context->tcpwrap_name) {
if (socket_fd >= 0)
if (!socket_tcpwrap(socket_fd, context->tcpwrap_name)) {
r = EXIT_TCPWRAP;
goto fail;
goto fail_child;
}
for (i = 0; i < (int) n_fds; i++) {
if (!socket_tcpwrap(fds[i], context->tcpwrap_name)) {
r = EXIT_TCPWRAP;
goto fail;
goto fail_child;
}
}
}
@ -1024,12 +1034,12 @@ int exec_spawn(ExecCommand *command,
/* Set up terminal for the question */
if ((r = setup_confirm_stdio(context,
&saved_stdin, &saved_stdout)))
goto fail;
goto fail_child;
/* Now ask the question. */
if (!(line = exec_command_line(argv))) {
r = EXIT_MEMORY;
goto fail;
goto fail_child;
}
r = ask(&response, "yns", "Execute %s? [Yes, No, Skip] ", line);
@ -1037,17 +1047,17 @@ int exec_spawn(ExecCommand *command,
if (r < 0 || response == 'n') {
r = EXIT_CONFIRM;
goto fail;
goto fail_child;
} else if (response == 's') {
r = 0;
goto fail;
goto fail_child;
}
/* Release terminal for the question */
if ((r = restore_confirm_stdio(context,
&saved_stdin, &saved_stdout,
&keep_stdin, &keep_stdout)))
goto fail;
goto fail_child;
}
/* If a socket is connected to STDIN/STDOUT/STDERR, we
@ -1058,24 +1068,24 @@ int exec_spawn(ExecCommand *command,
if (!keep_stdin)
if (setup_input(context, socket_fd, apply_tty_stdin) < 0) {
r = EXIT_STDIN;
goto fail;
goto fail_child;
}
if (!keep_stdout)
if (setup_output(context, socket_fd, file_name_from_path(command->path), apply_tty_stdin) < 0) {
r = EXIT_STDOUT;
goto fail;
goto fail_child;
}
if (setup_error(context, socket_fd, file_name_from_path(command->path), apply_tty_stdin) < 0) {
r = EXIT_STDERR;
goto fail;
goto fail_child;
}
if (cgroup_bondings)
if (cgroup_bonding_install_list(cgroup_bondings, 0) < 0) {
r = EXIT_CGROUP;
goto fail;
goto fail_child;
}
if (context->oom_score_adjust_set) {
@ -1097,7 +1107,7 @@ int exec_spawn(ExecCommand *command,
if (write_one_line_file("/proc/self/oom_adj", t) < 0) {
r = EXIT_OOM_ADJUST;
goto fail;
goto fail_child;
}
}
}
@ -1105,7 +1115,7 @@ int exec_spawn(ExecCommand *command,
if (context->nice_set)
if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) {
r = EXIT_NICE;
goto fail;
goto fail_child;
}
if (context->cpu_sched_set) {
@ -1117,26 +1127,26 @@ int exec_spawn(ExecCommand *command,
if (sched_setscheduler(0, context->cpu_sched_policy |
(context->cpu_sched_reset_on_fork ? SCHED_RESET_ON_FORK : 0), &param) < 0) {
r = EXIT_SETSCHEDULER;
goto fail;
goto fail_child;
}
}
if (context->cpuset)
if (sched_setaffinity(0, CPU_ALLOC_SIZE(context->cpuset_ncpus), context->cpuset) < 0) {
r = EXIT_CPUAFFINITY;
goto fail;
goto fail_child;
}
if (context->ioprio_set)
if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) {
r = EXIT_IOPRIO;
goto fail;
goto fail_child;
}
if (context->timer_slack_nsec_set)
if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) {
r = EXIT_TIMERSLACK;
goto fail;
goto fail_child;
}
if (context->utmp_id)
@ -1146,13 +1156,13 @@ int exec_spawn(ExecCommand *command,
username = context->user;
if (get_user_creds(&username, &uid, &gid, &home) < 0) {
r = EXIT_USER;
goto fail;
goto fail_child;
}
if (is_terminal_input(context->std_input))
if (chown_terminal(STDIN_FILENO, uid) < 0) {
r = EXIT_STDIN;
goto fail;
goto fail_child;
}
}
@ -1160,7 +1170,7 @@ int exec_spawn(ExecCommand *command,
if (context->pam_name && username) {
if (setup_pam(context->pam_name, username, context->tty_path, &pam_env, fds, n_fds) < 0) {
r = EXIT_PAM;
goto fail;
goto fail_child;
}
}
#endif
@ -1168,7 +1178,7 @@ int exec_spawn(ExecCommand *command,
if (apply_permissions)
if (enforce_groups(context, username, uid) < 0) {
r = EXIT_GROUP;
goto fail;
goto fail_child;
}
umask(context->umask);
@ -1184,18 +1194,18 @@ int exec_spawn(ExecCommand *command,
context->inaccessible_dirs,
context->private_tmp,
context->mount_flags)) < 0)
goto fail;
goto fail_child;
if (apply_chroot) {
if (context->root_directory)
if (chroot(context->root_directory) < 0) {
r = EXIT_CHROOT;
goto fail;
goto fail_child;
}
if (chdir(context->working_directory ? context->working_directory : "/") < 0) {
r = EXIT_CHDIR;
goto fail;
goto fail_child;
}
} else {
@ -1205,13 +1215,13 @@ int exec_spawn(ExecCommand *command,
context->root_directory ? context->root_directory : "",
context->working_directory ? context->working_directory : "") < 0) {
r = EXIT_MEMORY;
goto fail;
goto fail_child;
}
if (chdir(d) < 0) {
free(d);
r = EXIT_CHDIR;
goto fail;
goto fail_child;
}
free(d);
@ -1223,7 +1233,7 @@ int exec_spawn(ExecCommand *command,
shift_fds(fds, n_fds) < 0 ||
flags_fds(fds, n_fds, context->non_blocking) < 0) {
r = EXIT_FDS;
goto fail;
goto fail_child;
}
if (apply_permissions) {
@ -1234,14 +1244,14 @@ int exec_spawn(ExecCommand *command,
if (setrlimit(i, context->rlimit[i]) < 0) {
r = EXIT_LIMITS;
goto fail;
goto fail_child;
}
}
if (context->user)
if (enforce_user(context, uid) < 0) {
r = EXIT_USER;
goto fail;
goto fail_child;
}
/* PR_GET_SECUREBITS is not privileged, while
@ -1251,39 +1261,39 @@ int exec_spawn(ExecCommand *command,
if (prctl(PR_GET_SECUREBITS) != context->secure_bits)
if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) {
r = EXIT_SECUREBITS;
goto fail;
goto fail_child;
}
if (context->capabilities)
if (cap_set_proc(context->capabilities) < 0) {
r = EXIT_CAPABILITIES;
goto fail;
goto fail_child;
}
}
if (!(our_env = new0(char*, 7))) {
r = EXIT_MEMORY;
goto fail;
goto fail_child;
}
if (n_fds > 0)
if (asprintf(our_env + n_env++, "LISTEN_PID=%lu", (unsigned long) getpid()) < 0 ||
asprintf(our_env + n_env++, "LISTEN_FDS=%u", n_fds) < 0) {
r = EXIT_MEMORY;
goto fail;
goto fail_child;
}
if (home)
if (asprintf(our_env + n_env++, "HOME=%s", home) < 0) {
r = EXIT_MEMORY;
goto fail;
goto fail_child;
}
if (username)
if (asprintf(our_env + n_env++, "LOGNAME=%s", username) < 0 ||
asprintf(our_env + n_env++, "USER=%s", username) < 0) {
r = EXIT_MEMORY;
goto fail;
goto fail_child;
}
if (is_terminal_input(context->std_input) ||
@ -1291,25 +1301,26 @@ int exec_spawn(ExecCommand *command,
context->std_error == EXEC_OUTPUT_TTY)
if (!(our_env[n_env++] = strdup(default_term_for_tty(tty_path(context))))) {
r = EXIT_MEMORY;
goto fail;
goto fail_child;
}
assert(n_env <= 7);
if (!(final_env = strv_env_merge(
4,
5,
environment,
our_env,
context->environment,
files_env,
pam_env,
NULL))) {
r = EXIT_MEMORY;
goto fail;
goto fail_child;
}
if (!(final_argv = replace_env_argv(argv, final_env))) {
r = EXIT_MEMORY;
goto fail;
goto fail_child;
}
final_env = strv_env_clean(final_env);
@ -1317,10 +1328,11 @@ int exec_spawn(ExecCommand *command,
execve(command->path, final_argv, final_env);
r = EXIT_EXEC;
fail:
fail_child:
strv_free(our_env);
strv_free(final_env);
strv_free(pam_env);
strv_free(files_env);
strv_free(final_argv);
if (saved_stdin >= 0)
@ -1332,6 +1344,8 @@ int exec_spawn(ExecCommand *command,
_exit(r);
}
strv_free(files_env);
/* We add the new process to the cgroup both in the child (so
* that we can be sure that no user code is ever executed
* outside of the cgroup) and in the parent (so that we can be
@ -1346,6 +1360,11 @@ int exec_spawn(ExecCommand *command,
*ret = pid;
return 0;
fail_parent:
strv_free(files_env);
return r;
}
void exec_context_init(ExecContext *c) {
@ -1369,6 +1388,9 @@ void exec_context_done(ExecContext *c) {
strv_free(c->environment);
c->environment = NULL;
strv_free(c->environment_files);
c->environment_files = NULL;
for (l = 0; l < ELEMENTSOF(c->rlimit); l++) {
free(c->rlimit[l]);
c->rlimit[l] = NULL;
@ -1457,6 +1479,64 @@ void exec_command_free_array(ExecCommand **c, unsigned n) {
}
}
int exec_context_load_environment(const ExecContext *c, char ***l) {
char **i, **r = NULL;
assert(c);
assert(l);
STRV_FOREACH(i, c->environment_files) {
char *fn;
int k;
bool ignore = false;
char **p;
fn = *i;
if (fn[0] == '-') {
ignore = true;
fn ++;
}
if (!path_is_absolute(fn)) {
if (ignore)
continue;
strv_free(r);
return -EINVAL;
}
if ((k = load_env_file(fn, &p)) < 0) {
if (ignore)
continue;
strv_free(r);
return k;
}
if (r == NULL)
r = p;
else {
char **m;
m = strv_env_merge(2, r, p);
strv_free(r);
strv_free(p);
if (!m)
return -ENOMEM;
r = m;
}
}
*l = r;
return 0;
}
static void strv_fprintf(FILE *f, char **l) {
char **g;
@ -1488,9 +1568,11 @@ void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
prefix, yes_no(c->non_blocking),
prefix, yes_no(c->private_tmp));
if (c->environment)
for (e = c->environment; *e; e++)
fprintf(f, "%sEnvironment: %s\n", prefix, *e);
STRV_FOREACH(e, c->environment)
fprintf(f, "%sEnvironment: %s\n", prefix, *e);
STRV_FOREACH(e, c->environment_files)
fprintf(f, "%sEnvironmentFile: %s\n", prefix, *e);
if (c->tcpwrap_name)
fprintf(f,

4
src/execute.h
View File

@ -104,6 +104,8 @@ struct ExecCommand {
struct ExecContext {
char **environment;
char **environment_files;
struct rlimit *rlimit[RLIMIT_NLIMITS];
char *working_directory, *root_directory;
@ -203,6 +205,8 @@ void exec_context_init(ExecContext *c);
void exec_context_done(ExecContext *c);
void exec_context_dump(ExecContext *c, FILE* f, const char *prefix);
int exec_context_load_environment(const ExecContext *c, char ***l);
void exec_status_start(ExecStatus *s, pid_t pid);
void exec_status_exit(ExecStatus *s, pid_t pid, int code, int status, const char *utmp_id);
void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix);

70
src/load-fragment.c
View File

@ -1340,79 +1340,25 @@ static int config_parse_env_file(
void *data,
void *userdata) {
FILE *f;
int r;
char ***env = data;
bool ignore = false;
char ***env = data, **k;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
if (rvalue[0] == '-') {
ignore = true;
rvalue++;
}
if (!path_is_absolute(rvalue)) {
if (!path_is_absolute(rvalue[0] == '-' ? rvalue + 1 : rvalue)) {
log_error("[%s:%u] Path '%s' is not absolute, ignoring.", filename, line, rvalue);
return 0;
}
if (!(f = fopen(rvalue, "re"))) {
if (!ignore)
log_error("[%s:%u] Failed to open environment file '%s', ignoring: %m", filename, line, rvalue);
return 0;
}
if (!(k = strv_append(*env, rvalue)))
return -ENOMEM;
while (!feof(f)) {
char l[LINE_MAX], *p, *u;
char **t;
strv_free(*env);
*env = k;
if (!fgets(l, sizeof(l), f)) {
if (feof(f))
break;
log_error("[%s:%u] Failed to read environment file '%s', ignoring: %m", filename, line, rvalue);
r = 0;
goto finish;
}
p = strstrip(l);
if (!*p)
continue;
if (strchr(COMMENTS, *p))
continue;
if (!(u = normalize_env_assignment(p))) {
log_error("Out of memory");
r = -ENOMEM;
goto finish;
}
t = strv_append(*env, u);
free(u);
if (!t) {
log_error("Out of memory");
r = -ENOMEM;
goto finish;
}
strv_free(*env);
*env = t;
}
r = 0;
finish:
if (f)
fclose(f);
return r;
return 0;
}
static int config_parse_ip_tos(
@ -1803,7 +1749,7 @@ static int load_from_path(Unit *u, const char *path) {
{ "CPUAffinity", config_parse_cpu_affinity, &(context), section }, \
{ "UMask", config_parse_mode, &(context).umask, section }, \
{ "Environment", config_parse_strv, &(context).environment, section }, \
{ "EnvironmentFile", config_parse_env_file, &(context).environment, section }, \
{ "EnvironmentFile", config_parse_env_file, &(context).environment_files, 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 }, \

19
src/systemctl.c
View File

@ -2370,6 +2370,25 @@ static int print_property(const char *name, DBusMessageIter *iter) {
return 0;
} else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "EnvironmentFiles")) {
DBusMessageIter sub, sub2;
dbus_message_iter_recurse(iter, &sub);
while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
const char *path;
dbus_bool_t ignore;
dbus_message_iter_recurse(&sub, &sub2);
if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) >= 0 &&
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, false) >= 0)
printf("EnvironmentFile=%s (ignore=%s)\n", path, yes_no(ignore));
dbus_message_iter_next(&sub);
}
return 0;
} else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) {
DBusMessageIter sub, sub2;

67
src/util.c
View File

@ -683,6 +683,73 @@ fail:
return r;
}
int load_env_file(
const char *fname,
char ***rl) {
FILE *f;
char **m = 0;
int r;
assert(fname);
assert(rl);
if (!(f = fopen(fname, "re")))
return -errno;
while (!feof(f)) {
char l[LINE_MAX], *p, *u;
char **t;
if (!fgets(l, sizeof(l), f)) {
if (feof(f))
break;
r = -errno;
goto finish;
}
p = strstrip(l);
if (!*p)
continue;
if (strchr(COMMENTS, *p))
continue;
if (!(u = normalize_env_assignment(p))) {
log_error("Out of memory");
r = -ENOMEM;
goto finish;
}
t = strv_append(m, u);
free(u);
if (!t) {
log_error("Out of memory");
r = -ENOMEM;
goto finish;
}
strv_free(m);
m = t;
}
r = 0;
*rl = m;
m = NULL;
finish:
if (f)
fclose(f);
strv_free(m);
return r;
}
char *truncate_nl(char *s) {
assert(s);

1
src/util.h
View File

@ -195,6 +195,7 @@ int read_one_line_file(const char *fn, char **line);
int read_full_file(const char *fn, char **contents);
int parse_env_file(const char *fname, const char *separator, ...) _sentinel_;
int load_env_file(const char *fname, char ***l);
char *strappend(const char *s, const char *suffix);
char *strnappend(const char *s, const char *suffix, size_t length);