systemd-verify: check man pages

[elogind.git] / src / shared / pager.c

diff --git a/src/shared/pager.c b/src/shared/pager.c
index 002e3aa37356c7b0f556dd635bcacade31c7d502..54790947ba7d82eb678e73b1d99fd888bbe6094b 100644 (file)
--- a/src/shared/pager.c
+++ b/src/shared/pager.c
@@ -150,3 +150,56 @@ void pager_close(void) {
 bool pager_have(void) {
         return pager_pid > 0;
 }
+
+int show_man_page(const char *desc, bool null_stdio) {
+        const char *args[4] = { "man", NULL, NULL, NULL };
+        char *e = NULL;
+        pid_t pid;
+        size_t k;
+        int r;
+        siginfo_t status;
+
+        k = strlen(desc);
+
+        if (desc[k-1] == ')')
+                e = strrchr(desc, '(');
+
+        if (e) {
+                char *page = NULL, *section = NULL;
+
+                page = strndupa(desc, e - desc);
+                section = strndupa(e + 1, desc + k - e - 2);
+
+                args[1] = section;
+                args[2] = page;
+        } else
+                args[1] = desc;
+
+        pid = fork();
+        if (pid < 0) {
+                log_error("Failed to fork: %m");
+                return -errno;
+        }
+
+        if (pid == 0) {
+                /* Child */
+                if (null_stdio) {
+                        r = make_null_stdio();
+                        if (r < 0) {
+                                log_error("Failed to kill stdio: %s", strerror(-r));
+                                _exit(EXIT_FAILURE);
+                        }
+                }
+
+                execvp(args[0], (char**) args);
+                log_error("Failed to execute man: %m");
+                _exit(EXIT_FAILURE);
+        }
+
+        r = wait_for_terminate(pid, &status);
+        if (r < 0)
+                return r;
+
+        log_debug("Exit code %i status %i", status.si_code, status.si_status);
+        return status.si_status;
+}