fstab-generator: Do not try to fsck non-devices

[elogind.git] / src / fstab-generator / fstab-generator.c

diff --git a/src/fstab-generator/fstab-generator.c b/src/fstab-generator/fstab-generator.c
index 77247dee5e786bab7a68cd9cbfe264d926cb0d0b..5480e54b4ea87073d7b13f853e20dbc4056c22a8 100644 (file)
--- a/src/fstab-generator/fstab-generator.c
+++ b/src/fstab-generator/fstab-generator.c
@@ -32,7 +32,6 @@
 #include "mount-setup.h"
 #include "special.h"
 #include "mkdir.h"
-#include "virt.h"
 #include "fileio.h"
 
 static const char *arg_dest = "/tmp";
@@ -147,6 +146,57 @@ static bool mount_in_initrd(struct mntent *me) {
                 streq(me->mnt_dir, "/usr");
 }
 
+static int add_fsck(FILE *f, const char *what, const char *where, const char *type, int passno) {
+        assert(f);
+
+        if (passno == 0)
+                return 0;
+
+        if (!is_device_path(what)) {
+                log_warning("Checking was requested for \"%s\", but it is not a device.", what);
+                return 0;
+        }
+
+        if (type && !streq(type, "auto")) {
+                int r;
+                const char *checker;
+
+                checker = strappenda("/sbin/fsck.", type);
+                r = access(checker, X_OK);
+                if (r < 0) {
+                        log_warning("Checking was requested for %s, but %s cannot be used: %m", what, checker);
+
+                        /* treat missing check as essentially OK */
+                        return errno == ENOENT ? 0 : -errno;
+                }
+        }
+
+        if (streq(where, "/")) {
+                char *lnk;
+
+                lnk = strappenda(arg_dest, "/" SPECIAL_LOCAL_FS_TARGET ".wants/systemd-fsck-root.service");
+                mkdir_parents_label(lnk, 0755);
+                if (symlink("systemd-fsck-root.service", lnk) < 0) {
+                        log_error("Failed to create symlink %s: %m", lnk);
+                        return -errno;
+                }
+        } else {
+                _cleanup_free_ char *fsck = NULL;
+
+                fsck = unit_name_from_path_instance("systemd-fsck", what, ".service");
+                if (!fsck)
+                        return log_oom();
+
+                fprintf(f,
+                        "RequiresOverridable=%s\n"
+                        "After=%s\n",
+                        fsck,
+                        fsck);
+        }
+
+        return 0;
+}
+
 static int add_mount(
                 const char *what,
                 const char *where,
@@ -162,6 +212,7 @@ static int add_mount(
                 *name = NULL, *unit = NULL, *lnk = NULL,
                 *automount_name = NULL, *automount_unit = NULL;
         _cleanup_fclose_ FILE *f = NULL;
+        int r;
 
         assert(what);
         assert(where);
@@ -209,20 +260,9 @@ static int add_mount(
                         "Before=%s\n",
                         post);
 
-        if (passno > 0) {
-                _cleanup_free_ char *fsck = NULL;
-
-                fsck = unit_name_from_path_instance("systemd-fsck", what, ".service");
-                if (!fsck)
-                        return log_oom();
-
-                fprintf(f,
-                        "Requires=%s\n"
-                        "After=%s\n",
-                        fsck,
-                        fsck);
-        }
-
+        r = add_fsck(f, what, where, type, passno);
+        if (r < 0)
+                return r;
 
         fprintf(f,
                 "\n"
@@ -382,16 +422,16 @@ static int parse_fstab(const char *prefix, bool initrd) {
 
 static int parse_new_root_from_proc_cmdline(void) {
         _cleanup_free_ char *what = NULL, *type = NULL, *opts = NULL, *line = NULL;
+        bool noauto, nofail;
         char *w, *state;
-        int r;
         size_t l;
-        bool noauto, nofail;
+        int r;
 
-        r = read_one_line_file("/proc/cmdline", &line);
-        if (r < 0) {
-                log_error("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
+        r = proc_cmdline(&line);
+        if (r < 0)
+                log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
+        if (r <= 0)
                 return 0;
-        }
 
         opts = strdup("ro");
         type = strdup("auto");
@@ -464,17 +504,14 @@ static int parse_new_root_from_proc_cmdline(void) {
 static int parse_proc_cmdline(void) {
         _cleanup_free_ char *line = NULL;
         char *w, *state;
-        int r;
         size_t l;
+        int r;
 
-        if (detect_container(NULL) > 0)
-                return 0;
-
-        r = read_one_line_file("/proc/cmdline", &line);
-        if (r < 0) {
+        r = proc_cmdline(&line);
+        if (r < 0)
                 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
+        if (r <= 0)
                 return 0;
-        }
 
         FOREACH_WORD_QUOTED(w, l, line, state) {
                 _cleanup_free_ char *word = NULL;