Make pager_open() return void

src/shared/format-table.c

@@ -2783,7 +2783,7 @@ int table_print_with_pager(
          * the table header and logs about any error. */
 
         if (json_format_flags & (JSON_FORMAT_OFF|JSON_FORMAT_PRETTY|JSON_FORMAT_PRETTY_AUTO))
-                (void) pager_open(pager_flags);
+                pager_open(pager_flags);
 
         saved_header = t->header;
         t->header = show_header;

src/shared/pager.c

@@ -83,23 +83,23 @@ static int no_quit_on_interrupt(int exe_name_fd, const char *less_opts) {
         return r;
 }
 
-int pager_open(PagerFlags flags) {
+void pager_open(PagerFlags flags) {
         _cleanup_close_pair_ int fd[2] = { -1, -1 }, exe_name_pipe[2] = { -1, -1 };
         _cleanup_strv_free_ char **pager_args = NULL;
         const char *pager, *less_opts;
         int r;
 
         if (flags & PAGER_DISABLE)
-                return 0;
+                return;
 
         if (pager_pid > 0)
-                return 1;
+                return;
 
         if (terminal_is_dumb())
-                return 0;
+                return;
 
         if (!is_main_thread())
-                return log_error_errno(SYNTHETIC_ERRNO(EPERM), "Pager invoked from wrong thread.");
+                return (void) log_error_errno(SYNTHETIC_ERRNO(EPERM), "Pager invoked from wrong thread.");
 
         pager = getenv("SYSTEMD_PAGER");
         if (!pager)
@@ -108,11 +108,11 @@ int pager_open(PagerFlags flags) {
         if (pager) {
                 pager_args = strv_split(pager, WHITESPACE);
                 if (!pager_args)
-                        return log_oom();
+                        return (void) log_oom();
 
                 /* If the pager is explicitly turned off, honour it */
                 if (strv_isempty(pager_args) || strv_equal(pager_args, STRV_MAKE("cat")))
-                        return 0;
+                        return;
         }
 
         /* Determine and cache number of columns/lines before we spawn the pager so that we get the value from the
@@ -121,11 +121,11 @@ int pager_open(PagerFlags flags) {
         (void) lines();
 
         if (pipe2(fd, O_CLOEXEC) < 0)
-                return log_error_errno(errno, "Failed to create pager pipe: %m");
+                return (void) log_error_errno(errno, "Failed to create pager pipe: %m");
 
         /* This is a pipe to feed the name of the executed pager binary into the parent */
         if (pipe2(exe_name_pipe, O_CLOEXEC) < 0)
-                return log_error_errno(errno, "Failed to create exe_name pipe: %m");
+                return (void) log_error_errno(errno, "Failed to create exe_name pipe: %m");
 
         /* Initialize a good set of less options */
         less_opts = getenv("SYSTEMD_LESS");
@@ -137,7 +137,7 @@ int pager_open(PagerFlags flags) {
         /* We set SIGINT as PR_DEATHSIG signal here, to match the "K" parameter we set in $LESS, which enables SIGINT behaviour. */
         r = safe_fork("(pager)", FORK_RESET_SIGNALS|FORK_DEATHSIG_SIGINT|FORK_RLIMIT_NOFILE_SAFE|FORK_LOG, &pager_pid);
         if (r < 0)
-                return r;
+                return;
         if (r == 0) {
                 const char *less_charset, *exe;
 
@@ -245,26 +245,22 @@ int pager_open(PagerFlags flags) {
         stored_stdout = fcntl(STDOUT_FILENO, F_DUPFD_CLOEXEC, 3);
         if (dup2(fd[1], STDOUT_FILENO) < 0) {
                 stored_stdout = safe_close(stored_stdout);
-                return log_error_errno(errno, "Failed to duplicate pager pipe: %m");
+                return (void) log_error_errno(errno, "Failed to duplicate pager pipe: %m");
         }
         stdout_redirected = true;
 
         stored_stderr = fcntl(STDERR_FILENO, F_DUPFD_CLOEXEC, 3);
         if (dup2(fd[1], STDERR_FILENO) < 0) {
                 stored_stderr = safe_close(stored_stderr);
-                return log_error_errno(errno, "Failed to duplicate pager pipe: %m");
+                return (void) log_error_errno(errno, "Failed to duplicate pager pipe: %m");
         }
         stderr_redirected = true;
 
         exe_name_pipe[1] = safe_close(exe_name_pipe[1]);
 
         r = no_quit_on_interrupt(TAKE_FD(exe_name_pipe[0]), less_opts);
-        if (r < 0)
-                return r;
         if (r > 0)
                 (void) ignore_signals(SIGINT);
-
-        return 1;
 }
 
 void pager_close(void) {

src/shared/pager.h

@@ -10,7 +10,7 @@ typedef enum PagerFlags {
         PAGER_JUMP_TO_END = 1 << 1,
 } PagerFlags;
 
-int pager_open(PagerFlags flags);
+void pager_open(PagerFlags flags);
 void pager_close(void);
 bool pager_have(void) _pure_;