execute: explain in a comment, why close_all_fds() is invoked the second time differently

[elogind.git] / src / core / execute.c

diff --git a/src/core/execute.c b/src/core/execute.c
index 78fb81f7262771d97002512bb3e5ea964bfa0c67..b5b22472d5a9f8ff954ad409484e4cef7aaedca8 100644 (file)
--- a/src/core/execute.c
+++ b/src/core/execute.c
@@ -333,7 +333,7 @@ static int setup_input(const ExecContext *context, int socket_fd, bool apply_tty
                                       i == EXEC_INPUT_TTY_FAIL,
                                       i == EXEC_INPUT_TTY_FORCE,
                                       false,
-                                      (usec_t) -1);
+                                      USEC_INFINITY);
                 if (fd < 0)
                         return fd;
 
@@ -561,7 +561,7 @@ static int restore_confirm_stdio(int *saved_stdin,
 
 static int ask_for_confirmation(char *response, char **argv) {
         int saved_stdout = -1, saved_stdin = -1, r;
-        char *line;
+        _cleanup_free_ char *line = NULL;
 
         r = setup_confirm_stdio(&saved_stdin, &saved_stdout);
         if (r < 0)
@@ -571,8 +571,7 @@ static int ask_for_confirmation(char *response, char **argv) {
         if (!line)
                 return -ENOMEM;
 
-        r = ask(response, "yns", "Execute %s? [Yes, No, Skip] ", line);
-        free(line);
+        r = ask_char(response, "yns", "Execute %s? [Yes, No, Skip] ", line);
 
         restore_confirm_stdio(&saved_stdin, &saved_stdout);
 
@@ -1465,7 +1464,7 @@ int exec_spawn(ExecCommand *command,
                                 goto fail_child;
                         }
 
-                if (context->timer_slack_nsec != (nsec_t) -1)
+                if (context->timer_slack_nsec != NSEC_INFINITY)
                         if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) {
                                 err = -errno;
                                 r = EXIT_TIMERSLACK;
@@ -1636,7 +1635,9 @@ int exec_spawn(ExecCommand *command,
                 }
 
                 /* We repeat the fd closing here, to make sure that
-                 * nothing is leaked from the PAM modules */
+                 * nothing is leaked from the PAM modules. Note that
+                 * we are more aggressive this time since socket_fd
+                 * and the netns fds we don#t need anymore. */
                 err = close_all_fds(fds, n_fds);
                 if (err >= 0)
                         err = shift_fds(fds, n_fds);
@@ -1834,7 +1835,7 @@ void exec_context_init(ExecContext *c) {
         c->syslog_priority = LOG_DAEMON|LOG_INFO;
         c->syslog_level_prefix = true;
         c->ignore_sigpipe = true;
-        c->timer_slack_nsec = (nsec_t) -1;
+        c->timer_slack_nsec = NSEC_INFINITY;
         c->personality = 0xffffffffUL;
         c->runtime_directory_mode = 0755;
 }
@@ -2024,7 +2025,7 @@ int exec_context_load_environment(const ExecContext *c, char ***l) {
                         return -EINVAL;
                 }
                 for (n = 0; n < count; n++) {
-                        k = load_env_file(pglob.gl_pathv[n], NULL, &p);
+                        k = load_env_file(NULL, pglob.gl_pathv[n], NULL, &p);
                         if (k < 0) {
                                 if (ignore)
                                         continue;
@@ -2058,8 +2059,8 @@ int exec_context_load_environment(const ExecContext *c, char ***l) {
 }
 
 static bool tty_may_match_dev_console(const char *tty) {
-        char *active = NULL, *console;
-        bool b;
+        _cleanup_free_ char *active = NULL;
+       char *console;
 
         if (startswith(tty, "/dev/"))
                 tty += 5;
@@ -2074,10 +2075,7 @@ static bool tty_may_match_dev_console(const char *tty) {
                 return true;
 
         /* "tty0" means the active VC, so it may be the same sometimes */
-        b = streq(console, tty) || (streq(console, "tty0") && tty_is_vc(tty));
-        free(active);
-
-        return b;
+        return streq(console, tty) || (streq(console, "tty0") && tty_is_vc(tty));
 }
 
 bool exec_context_may_touch_console(ExecContext *ec) {
@@ -2181,7 +2179,7 @@ void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
                 fputs("\n", f);
         }
 
-        if (c->timer_slack_nsec != (nsec_t) -1)
+        if (c->timer_slack_nsec != NSEC_INFINITY)
                 fprintf(f, "%sTimerSlackNSec: "NSEC_FMT "\n", prefix, c->timer_slack_nsec);
 
         fprintf(f,
@@ -2402,12 +2400,11 @@ void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) {
         assert(s);
         assert(f);
 
-        if (!prefix)
-                prefix = "";
-
         if (s->pid <= 0)
                 return;
 
+        prefix = strempty(prefix);
+
         fprintf(f,
                 "%sPID: "PID_FMT"\n",
                 prefix, s->pid);
@@ -2467,37 +2464,27 @@ char *exec_command_line(char **argv) {
 }
 
 void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) {
-        char *p2;
+        _cleanup_free_ char *cmd = NULL;
         const char *prefix2;
 
-        char *cmd;
-
         assert(c);
         assert(f);
 
-        if (!prefix)
-                prefix = "";
-        p2 = strappend(prefix, "\t");
-        prefix2 = p2 ? p2 : prefix;
+        prefix = strempty(prefix);
+        prefix2 = strappenda(prefix, "\t");
 
         cmd = exec_command_line(c->argv);
-
         fprintf(f,
                 "%sCommand Line: %s\n",
                 prefix, cmd ? cmd : strerror(ENOMEM));
 
-        free(cmd);
-
         exec_status_dump(&c->exec_status, f, prefix2);
-
-        free(p2);
 }
 
 void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) {
         assert(f);
 
-        if (!prefix)
-                prefix = "";
+        prefix = strempty(prefix);
 
         LIST_FOREACH(command, c, c)
                 exec_command_dump(c, f, prefix);