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Diffstat (limited to 'execute.c')
-rw-r--r--execute.c218
1 files changed, 194 insertions, 24 deletions
diff --git a/execute.c b/execute.c
index f2f2be74cf..6f12c276fa 100644
--- a/execute.c
+++ b/execute.c
@@ -9,6 +9,8 @@
#include <signal.h>
#include <sys/socket.h>
#include <sys/un.h>
+#include <sys/prctl.h>
+#include <sched.h>
#include "execute.h"
#include "strv.h"
@@ -16,6 +18,7 @@
#include "util.h"
#include "log.h"
#include "ioprio.h"
+#include "securebits.h"
static int close_fds(int except[], unsigned n_except) {
DIR *d;
@@ -166,20 +169,19 @@ static int setup_output(const ExecContext *context, const char *ident) {
switch (context->output) {
- case EXEC_CONSOLE:
+ case EXEC_OUTPUT_CONSOLE:
return 0;
- case EXEC_NULL:
+ case EXEC_OUTPUT_NULL:
- if ((r = replace_null_fd(STDIN_FILENO, O_RDONLY)) < 0 ||
- (r = replace_null_fd(STDOUT_FILENO, O_WRONLY)) < 0 ||
+ if ((r = replace_null_fd(STDOUT_FILENO, O_WRONLY)) < 0 ||
(r = replace_null_fd(STDERR_FILENO, O_WRONLY)) < 0)
return r;
return 0;
- case EXEC_KERNEL:
- case EXEC_SYSLOG: {
+ case EXEC_OUTPUT_KERNEL:
+ case EXEC_OUTPUT_SYSLOG: {
int fd;
union {
@@ -187,9 +189,6 @@ static int setup_output(const ExecContext *context, const char *ident) {
struct sockaddr_un un;
} sa;
- if ((r = replace_null_fd(STDIN_FILENO, O_RDONLY)) < 0)
- return r;
-
close_nointr(STDOUT_FILENO);
close_nointr(STDERR_FILENO);
@@ -237,15 +236,37 @@ static int setup_output(const ExecContext *context, const char *ident) {
"%s\n"
"%i\n"
"%s\n",
- context->output == EXEC_KERNEL ? "kmsg" : "syslog",
+ context->output == EXEC_OUTPUT_KERNEL ? "kmsg" : "syslog",
context->syslog_priority,
context->syslog_identifier ? context->syslog_identifier : ident);
return 0;
}
+
+ default:
+ assert_not_reached("Unknown output type");
}
+}
+
+int setup_input(const ExecContext *context) {
+ int r;
+
+ assert(context);
- assert_not_reached("Unknown logging type");
+ switch (context->input) {
+
+ case EXEC_INPUT_CONSOLE:
+ return 0;
+
+ case EXEC_INPUT_NULL:
+ if ((r = replace_null_fd(STDIN_FILENO, O_RDONLY)) < 0)
+ return r;
+
+ return 0;
+
+ default:
+ assert_not_reached("Unknown input type");
+ }
}
int exec_spawn(const ExecCommand *command, const ExecContext *context, int *fds, unsigned n_fds, pid_t *ret) {
@@ -281,6 +302,11 @@ int exec_spawn(const ExecCommand *command, const ExecContext *context, int *fds,
umask(context->umask);
+ if (setup_input(context) < 0) {
+ r = EXIT_INPUT;
+ goto fail;
+ }
+
if (setup_output(context, file_name_from_path(command->path)) < 0) {
r = EXIT_OUTPUT;
goto fail;
@@ -315,12 +341,36 @@ int exec_spawn(const ExecCommand *command, const ExecContext *context, int *fds,
goto fail;
}
+ if (context->cpu_sched_set) {
+ struct sched_param param;
+
+ zero(param);
+ param.sched_priority = context->cpu_sched_priority;
+
+ if (sched_setscheduler(0, context->cpu_sched_policy, &param) < 0) {
+ r = EXIT_SETSCHEDULER;
+ goto fail;
+ }
+ }
+
+ if (context->cpu_affinity_set)
+ if (sched_setaffinity(0, sizeof(context->cpu_affinity), &context->cpu_affinity) < 0) {
+ r = EXIT_CPUAFFINITY;
+ goto fail;
+ }
+
if (context->ioprio_set)
if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) {
r = EXIT_IOPRIO;
goto fail;
}
+ if (context->timer_slack_ns_set)
+ if (prctl(PR_SET_TIMERSLACK, context->timer_slack_ns_set) < 0) {
+ r = EXIT_TIMERSLACK;
+ goto fail;
+ }
+
if (close_fds(fds, n_fds) < 0 ||
shift_fds(fds, n_fds) < 0 ||
flags_fds(fds, n_fds) < 0) {
@@ -338,6 +388,13 @@ int exec_spawn(const ExecCommand *command, const ExecContext *context, int *fds,
}
}
+ if (context->secure_bits) {
+ if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) {
+ r = EXIT_SECUREBITS;
+ goto fail;
+ }
+ }
+
if (n_fds > 0) {
char a[64], b[64];
char *listen_env[3] = {
@@ -383,17 +440,24 @@ void exec_context_init(ExecContext *c) {
assert(c);
c->umask = 0002;
- cap_clear(c->capabilities);
- c->capabilities_set = false;
c->oom_adjust = 0;
c->oom_adjust_set = false;
c->nice = 0;
c->nice_set = false;
c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0);
c->ioprio_set = false;
+ c->cpu_sched_policy = SCHED_OTHER;
+ c->cpu_sched_priority = 0;
+ c->cpu_sched_set = false;
+ CPU_ZERO(&c->cpu_affinity);
+ c->cpu_affinity_set = false;
+ c->input = 0;
c->output = 0;
c->syslog_priority = LOG_DAEMON|LOG_INFO;
+
+ c->secure_bits = 0;
+ c->capability_bounding_set_drop = 0;
}
void exec_context_done(ExecContext *c) {
@@ -425,6 +489,11 @@ void exec_context_done(ExecContext *c) {
strv_free(c->supplementary_groups);
c->supplementary_groups = NULL;
+
+ if (c->capabilities) {
+ cap_free(c->capabilities);
+ c->capabilities = NULL;
+ }
}
void exec_command_free_list(ExecCommand *c) {
@@ -449,13 +518,8 @@ void exec_command_free_array(ExecCommand **c, unsigned n) {
}
void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
-
- static const char * const table[] = {
- [IOPRIO_CLASS_NONE] = "none",
- [IOPRIO_CLASS_RT] = "realtime",
- [IOPRIO_CLASS_BE] = "best-effort",
- [IOPRIO_CLASS_IDLE] = "idle"
- };
+ char ** e;
+ unsigned i;
assert(c);
assert(f);
@@ -464,13 +528,17 @@ void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
prefix = "";
fprintf(f,
- "%sUmask: %04o\n"
- "%sWorking Directory: %s\n"
- "%sRoot Directory: %s\n",
+ "%sUMask: %04o\n"
+ "%sWorkingDirectory: %s\n"
+ "%sRootDirectory: %s\n",
prefix, c->umask,
prefix, c->working_directory ? c->working_directory : "/",
prefix, c->root_directory ? c->root_directory : "/");
+ if (c->environment)
+ for (e = c->environment; *e; e++)
+ fprintf(f, "%sEnvironment: %s\n", prefix, *e);
+
if (c->nice_set)
fprintf(f,
"%sNice: %i\n",
@@ -481,12 +549,98 @@ void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
"%sOOMAdjust: %i\n",
prefix, c->oom_adjust);
+ for (i = 0; i < RLIM_NLIMITS; i++)
+ if (c->rlimit[i])
+ fprintf(f, "%s: %llu\n", rlimit_to_string(i), (unsigned long long) c->rlimit[i]->rlim_max);
+
if (c->ioprio_set)
fprintf(f,
"%sIOSchedulingClass: %s\n"
"%sIOPriority: %i\n",
- prefix, table[IOPRIO_PRIO_CLASS(c->ioprio)],
+ prefix, ioprio_class_to_string(IOPRIO_PRIO_CLASS(c->ioprio)),
prefix, (int) IOPRIO_PRIO_DATA(c->ioprio));
+
+ if (c->cpu_sched_set)
+ fprintf(f,
+ "%sCPUSchedulingPolicy: %s\n"
+ "%sCPUSchedulingPriority: %i\n",
+ prefix, sched_policy_to_string(c->cpu_sched_policy),
+ prefix, c->cpu_sched_priority);
+
+ if (c->cpu_affinity_set) {
+ fprintf(f, "%sCPUAffinity:", prefix);
+ for (i = 0; i < CPU_SETSIZE; i++)
+ if (CPU_ISSET(i, &c->cpu_affinity))
+ fprintf(f, " %i", i);
+ fputs("\n", f);
+ }
+
+ if (c->timer_slack_ns_set)
+ fprintf(f, "%sTimerSlackNS: %lu\n", prefix, c->timer_slack_ns);
+
+ fprintf(f,
+ "%sInput: %s\n"
+ "%sOutput: %s\n",
+ prefix, exec_input_to_string(c->input),
+ prefix, exec_output_to_string(c->output));
+
+ if (c->output == EXEC_OUTPUT_SYSLOG || c->output == EXEC_OUTPUT_KERNEL)
+ fprintf(f,
+ "%sSyslogFacility: %s\n"
+ "%sSyslogLevel: %s\n",
+ prefix, log_facility_to_string(LOG_FAC(c->syslog_priority)),
+ prefix, log_level_to_string(LOG_PRI(c->syslog_priority)));
+
+ if (c->capabilities) {
+ char *t;
+ if ((t = cap_to_text(c->capabilities, NULL))) {
+ fprintf(f, "%sCapabilities: %s\n",
+ prefix, t);
+ cap_free(t);
+ }
+ }
+
+ if (c->secure_bits)
+ fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n",
+ prefix,
+ (c->secure_bits & SECURE_KEEP_CAPS) ? " keep-caps" : "",
+ (c->secure_bits & SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "",
+ (c->secure_bits & SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "",
+ (c->secure_bits & SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "",
+ (c->secure_bits & SECURE_NOROOT) ? " noroot" : "",
+ (c->secure_bits & SECURE_NOROOT_LOCKED) ? "noroot-locked" : "");
+
+ if (c->capability_bounding_set_drop) {
+ fprintf(f, "%sCapabilityBoundingSetDrop:", prefix);
+
+ for (i = 0; i <= CAP_LAST_CAP; i++)
+ if (c->capability_bounding_set_drop & (1 << i)) {
+ char *t;
+
+ if ((t = cap_to_name(i))) {
+ fprintf(f, " %s", t);
+ free(t);
+ }
+ }
+
+ fputs("\n", f);
+ }
+
+ if (c->user)
+ fprintf(f, "%sUser: %s", prefix, c->user);
+ if (c->group)
+ fprintf(f, "%sGroup: %s", prefix, c->group);
+
+ if (c->supplementary_groups) {
+ char **g;
+
+ fprintf(f, "%sSupplementaryGroups:", prefix);
+
+ STRV_FOREACH(g, c->supplementary_groups)
+ fprintf(f, " %s", *g);
+
+ fputs("\n", f);
+ }
}
void exec_status_fill(ExecStatus *s, pid_t pid, int code, int status) {
@@ -565,3 +719,19 @@ void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) {
LIST_FOREACH(command, c, c)
exec_command_dump(c, f, prefix);
}
+
+static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = {
+ [EXEC_OUTPUT_CONSOLE] = "console",
+ [EXEC_OUTPUT_NULL] = "null",
+ [EXEC_OUTPUT_SYSLOG] = "syslog",
+ [EXEC_OUTPUT_KERNEL] = "kernel"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput);
+
+static const char* const exec_input_table[_EXEC_INPUT_MAX] = {
+ [EXEC_INPUT_NULL] = "null",
+ [EXEC_INPUT_CONSOLE] = "console"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-12 23:49:08 +0000