don't make up buffer sizes, use standard LINE_MAX instead

src/dbus-manager.c

@@ -218,7 +218,7 @@ static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_exec_output, exec_outp
 
 static int bus_manager_append_tainted(Manager *m, DBusMessageIter *i, const char *property, void *data) {
         const char *t;
-        char buf[64] = "", *e = buf, *p = NULL;
+        char buf[LINE_MAX] = "", *e = buf, *p = NULL;
 
         assert(m);
         assert(i);

src/manager.c

@@ -2681,7 +2681,7 @@ int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {
         m->n_deserializing ++;
 
         for (;;) {
-                char line[1024], *l;
+                char line[LINE_MAX], *l;
 
                 if (!fgets(line, sizeof(line), f)) {
                         if (feof(f))

src/mount-setup.c

@@ -134,7 +134,7 @@ static int mount_one(const MountPoint *p) {
 static int mount_cgroup_controllers(void) {
         int r;
         FILE *f;
-        char buf [256];
+        char buf[LINE_MAX];
 
         /* Mount all available cgroup controllers that are built into the kernel. */
 

src/readahead-common.c

@@ -209,7 +209,6 @@ finish:
         return m;
 }
 
-
 #define BUMP_REQUEST_NR (16*1024)
 
 int bump_request_nr(const char *p) {

src/unit.c

@@ -2152,7 +2152,7 @@ int unit_deserialize(Unit *u, FILE *f, FDSet *fds) {
                 return 0;
 
         for (;;) {
-                char line[1024], *l, *v;
+                char line[LINE_MAX], *l, *v;
                 size_t k;
 
                 if (!fgets(line, sizeof(line), f)) {

src/util.c

@@ -452,7 +452,7 @@ char **split_path_and_make_absolute(const char *p) {
 int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
         int r;
         FILE *f;
-        char fn[132], line[256], *p;
+        char fn[PATH_MAX], line[LINE_MAX], *p;
         long unsigned ppid;
 
         assert(pid >= 0);
@@ -2063,7 +2063,7 @@ int chvt(int vt) {
 int read_one_char(FILE *f, char *ret, bool *need_nl) {
         struct termios old_termios, new_termios;
         char c;
-        char line[1024];
+        char line[LINE_MAX];
 
         assert(f);
         assert(ret);
@@ -2271,7 +2271,7 @@ int flush_fd(int fd) {
         pollfd.events = POLLIN;
 
         for (;;) {
-                char buf[1024];
+                char buf[LINE_MAX];
                 ssize_t l;
                 int r;
 
@@ -2897,7 +2897,7 @@ int getttyname_harder(int fd, char **r) {
 
 int get_ctty_devnr(dev_t *d) {
         int k;
-        char line[256], *p;
+        char line[LINE_MAX], *p;
         unsigned long ttynr;
         FILE *f;
 
@@ -2932,7 +2932,7 @@ int get_ctty_devnr(dev_t *d) {
 
 int get_ctty(char **r, dev_t *_devnr) {
         int k;
-        char fn[128], *s, *b, *p;
+        char fn[PATH_MAX], *s, *b, *p;
         dev_t devnr;
 
         assert(r);