fstab-generator: modernize style

1 files changed, 52 insertions, 123 deletions

diff --git a/src/fstab-generator/fstab-generator.c b/src/fstab-generator/fstab-generator.c
index a0173d821e..f3ecc24be6 100644
--- a/src/fstab-generator/fstab-generator.c
+++ b/src/fstab-generator/fstab-generator.c
@@ -79,8 +79,8 @@ static int mount_find_pri(struct mntent *me, int *ret) {
 }
 
 static int add_swap(const char *what, struct mntent *me) {
-        char *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL;
-        FILE *f = NULL;
+        char _cleanup_free_ *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL;
+        FILE _cleanup_fclose_ *f = NULL;
         bool noauto, nofail;
         int r, pri = -1;
 
@@ -97,25 +97,20 @@ static int add_swap(const char *what, struct mntent *me) {
         nofail = !!hasmntopt(me, "nofail");
 
         name = unit_name_from_path(what, ".swap");
-        if (!name) {
-                r = log_oom();
-                goto finish;
-        }
+        if (!name)
+                return log_oom();
 
         unit = strjoin(arg_dest, "/", name, NULL);
-        if (!unit) {
-                r = log_oom();
-                goto finish;
-        }
+        if (!unit)
+                return log_oom();
 
         f = fopen(unit, "wxe");
         if (!f) {
-                r = -errno;
                 if (errno == EEXIST)
                         log_error("Failed to create swap unit file %s, as it already exists. Duplicate entry in /etc/fstab?", unit);
                 else
                         log_error("Failed to create unit file %s: %m", unit);
-                goto finish;
+                return -errno;
         }
 
         fputs("# Automatically generated by systemd-fstab-generator\n\n"
@@ -142,56 +137,39 @@ static int add_swap(const char *what, struct mntent *me) {
         fflush(f);
         if (ferror(f)) {
                 log_error("Failed to write unit file %s: %m", unit);
-                r = -errno;
-                goto finish;
+                return -errno;
         }
 
         if (!noauto) {
                 lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET ".wants/", name, NULL);
-                if (!lnk) {
-                        r = log_oom();
-                        goto finish;
-                }
+                if (!lnk)
+                        return log_oom();
 
                 mkdir_parents_label(lnk, 0755);
                 if (symlink(unit, lnk) < 0) {
                         log_error("Failed to create symlink %s: %m", lnk);
-                        r = -errno;
-                        goto finish;
+                        return -errno;
                 }
 
                 r = device_name(what, &device);
                 if (r < 0)
-                        goto finish;
+                        return r;
 
                 if (r > 0) {
                         free(lnk);
                         lnk = strjoin(arg_dest, "/", device, ".wants/", name, NULL);
-                        if (!lnk) {
-                                r = log_oom();
-                                goto finish;
-                        }
+                        if (!lnk)
+                                return log_oom();
 
                         mkdir_parents_label(lnk, 0755);
                         if (symlink(unit, lnk) < 0) {
                                 log_error("Failed to create symlink %s: %m", lnk);
-                                r = -errno;
-                                goto finish;
+                                return -errno;
                         }
                 }
         }
 
-        r = 0;
-finish:
-        if (f)
-                fclose(f);
-
-        free(unit);
-        free(lnk);
-        free(name);
-        free(device);
-
-        return r;
+        return 0;
 }
 
 static bool mount_is_bind(struct mntent *me) {
@@ -213,8 +191,10 @@ static bool mount_is_network(struct mntent *me) {
 static int add_mount(const char *what, const char *where, const char *type, const char *opts,
                      int passno, bool wait, bool noauto, bool nofail, bool automount, bool isbind, bool isnetwork,
                      const char *source) {
-        char *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL, *automount_name = NULL, *automount_unit = NULL;
-        FILE *f = NULL;
+        char _cleanup_free_
+                *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL,
+                *automount_name = NULL, *automount_unit = NULL;
+        FILE _cleanup_fclose_ *f = NULL;
         int r;
         const char *post, *pre;
 
@@ -245,25 +225,20 @@ static int add_mount(const char *what, const char *where, const char *type, cons
         }
 
         name = unit_name_from_path(where, ".mount");
-        if (!name) {
-                r = log_oom();
-                goto finish;
-        }
+        if (!name)
+                return log_oom();
 
         unit = strjoin(arg_dest, "/", name, NULL);
-        if (!unit) {
-                r = log_oom();
-                goto finish;
-        }
+        if (!unit)
+                return log_oom();
 
         f = fopen(unit, "wxe");
         if (!f) {
-                r = -errno;
                 if (errno == EEXIST)
                         log_error("Failed to create mount unit file %s, as it already exists. Duplicate entry in /etc/fstab?", unit);
                 else
                         log_error("Failed to create unit file %s: %m", unit);
-                goto finish;
+                return -errno;
         }
 
         fprintf(f,
@@ -313,22 +288,18 @@ static int add_mount(const char *what, const char *where, const char *type, cons
         fflush(f);
         if (ferror(f)) {
                 log_error("Failed to write unit file %s: %m", unit);
-                r = -errno;
-                goto finish;
+                return -errno;
         }
 
         if (!noauto) {
                 lnk = strjoin(arg_dest, "/", post, nofail || automount ? ".wants/" : ".requires/", name, NULL);
-                if (!lnk) {
-                        r = log_oom();
-                        goto finish;
-                }
+                if (!lnk)
+                        return log_oom();
 
                 mkdir_parents_label(lnk, 0755);
                 if (symlink(unit, lnk) < 0) {
                         log_error("Failed to create symlink %s: %m", lnk);
-                        r = -errno;
-                        goto finish;
+                        return -errno;
                 }
 
                 if (!isbind &&
@@ -336,21 +307,18 @@ static int add_mount(const char *what, const char *where, const char *type, cons
 
                         r = device_name(what, &device);
                         if (r < 0)
-                                goto finish;
+                                return r;
 
                         if (r > 0) {
                                 free(lnk);
                                 lnk = strjoin(arg_dest, "/", device, ".wants/", name, NULL);
-                                if (!lnk) {
-                                        r = log_oom();
-                                        goto finish;
-                                }
+                                if (!lnk)
+                                        return log_oom();
 
                                 mkdir_parents_label(lnk, 0755);
                                 if (symlink(unit, lnk) < 0) {
                                         log_error("Failed to create symlink %s: %m", lnk);
-                                        r = -errno;
-                                        goto finish;
+                                        return -errno;
                                 }
                         }
                 }
@@ -358,23 +326,18 @@ static int add_mount(const char *what, const char *where, const char *type, cons
 
         if (automount && !path_equal(where, "/")) {
                 automount_name = unit_name_from_path(where, ".automount");
-                if (!name) {
-                        r = log_oom();
-                        goto finish;
-                }
+                if (!name)
+                        return log_oom();
 
                 automount_unit = strjoin(arg_dest, "/", automount_name, NULL);
-                if (!automount_unit) {
-                        r = log_oom();
-                        goto finish;
-                }
+                if (!automount_unit)
+                        return log_oom();
 
                 fclose(f);
                 f = fopen(automount_unit, "wxe");
                 if (!f) {
-                        r = -errno;
                         log_error("Failed to create unit file %s: %m", automount_unit);
-                        goto finish;
+                        return -errno;
                 }
 
                 fprintf(f,
@@ -393,38 +356,22 @@ static int add_mount(const char *what, const char *where, const char *type, cons
                 fflush(f);
                 if (ferror(f)) {
                         log_error("Failed to write unit file %s: %m", automount_unit);
-                        r = -errno;
-                        goto finish;
+                        return -errno;
                 }
 
                 free(lnk);
                 lnk = strjoin(arg_dest, "/", post, nofail ? ".wants/" : ".requires/", automount_name, NULL);
-                if (!lnk) {
-                        r = log_oom();
-                        goto finish;
-                }
+                if (!lnk)
+                        return log_oom();
 
                 mkdir_parents_label(lnk, 0755);
                 if (symlink(automount_unit, lnk) < 0) {
                         log_error("Failed to create symlink %s: %m", lnk);
-                        r = -errno;
-                        goto finish;
+                        return -errno;
                 }
         }
 
-        r = 0;
-finish:
-        if (f)
-                fclose(f);
-
-        free(unit);
-        free(lnk);
-        free(name);
-        free(device);
-        free(automount_name);
-        free(automount_unit);
-
-        return r;
+        return 0;
 }
 
 static int parse_fstab(void) {
@@ -443,19 +390,13 @@ static int parse_fstab(void) {
         }
 
         while ((me = getmntent(f))) {
-                char *where, *what;
+                char _cleanup_free_ *where = NULL, *what = NULL;
                 int k;
 
                 what = fstab_node_to_udev_node(me->mnt_fsname);
-                if (!what) {
-                        r = log_oom();
-                        goto finish;
-                }
-
                 where = strdup(me->mnt_dir);
-                if (!where) {
+                if (!what || !where) {
                         r = log_oom();
-                        free(what);
                         goto finish;
                 }
 
@@ -483,9 +424,6 @@ static int parse_fstab(void) {
                                      "/etc/fstab");
                 }
 
-                free(what);
-                free(where);
-
                 if (k < 0)
                         r = k;
         }
@@ -509,10 +447,8 @@ static int parse_new_root_from_proc_cmdline(void) {
         }
 
         opts = strdup("defaults");
-        if (!opts)
-                return log_oom();
         type = strdup("auto");
-        if (!type)
+        if (!opts || !type)
                 return log_oom();
 
 	/* root= and roofstype= may occur more than once, the last instance should take precedence.
@@ -571,7 +507,8 @@ static int parse_new_root_from_proc_cmdline(void) {
 }
 
 static int parse_proc_cmdline(void) {
-        char *line, *w, *state;
+        char _cleanup_free_ *line = NULL;
+        char *w, *state;
         int r;
         size_t l;
 
@@ -585,13 +522,11 @@ static int parse_proc_cmdline(void) {
         }
 
         FOREACH_WORD_QUOTED(w, l, line, state) {
-                char *word;
+                char _cleanup_free_ *word = NULL;
 
                 word = strndup(w, l);
-                if (!word) {
-                        r = log_oom();
-                        goto finish;
-                }
+                if (!word)
+                        return log_oom();
 
                 if (startswith(word, "fstab=")) {
                         r = parse_boolean(word + 6);
@@ -615,15 +550,9 @@ static int parse_proc_cmdline(void) {
 
                         log_warning("Unknown kernel switch %s. Ignoring.", word);
                 }
-
-                free(word);
         }
 
-        r = 0;
-
-finish:
-        free(line);
-        return r;
+        return 0;
 }
 
 int main(int argc, char *argv[]) {