X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fshared%2Futil.c;h=97f766c33c5b043559472d3b6817d442626c4bc1;hp=69c9437db83a826826435bcddbb04603cab02100;hb=e98055de981b568c31f18f470181ae166b56f172;hpb=57f3067825d9361d7487f272bfaff3b36c684c62

diff --git a/src/shared/util.c b/src/shared/util.c
index 69c9437db..97f766c33 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -1184,8 +1184,11 @@ char *strnappend(const char *s, const char *suffix, size_t b) {
         assert(suffix);
 
         a = strlen(s);
+        if (b > ((size_t) -1) - a)
+                return NULL;
 
-        if (!(r = new(char, a+b+1)))
+        r = new(char, a+b+1);
+        if (!r)
                 return NULL;
 
         memcpy(r, s, a);
@@ -2956,9 +2959,10 @@ int dir_is_empty(const char *path) {
                 return -errno;
 
         for (;;) {
-                struct dirent buf, *de;
+                struct dirent *de;
+                union dirent_storage buf;
 
-                r = readdir_r(d, &buf, &de);
+                r = readdir_r(d, &buf.de, &de);
                 if (r > 0)
                         return -r;
 
@@ -3260,12 +3264,13 @@ int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct
         }
 
         for (;;) {
-                struct dirent buf, *de;
+                struct dirent *de;
+                union dirent_storage buf;
                 bool is_dir, keep_around;
                 struct stat st;
                 int r;
 
-                r = readdir_r(d, &buf, &de);
+                r = readdir_r(d, &buf.de, &de);
                 if (r != 0 && ret == 0) {
                         ret = -r;
                         break;
@@ -4942,10 +4947,11 @@ int get_files_in_directory(const char *path, char ***list) {
                 return -errno;
 
         for (;;) {
-                struct dirent buffer, *de;
+                struct dirent *de;
+                union dirent_storage buf;
                 int k;
 
-                k = readdir_r(d, &buffer, &de);
+                k = readdir_r(d, &buf.de, &de);
                 if (k != 0) {
                         r = -k;
                         goto finish;
@@ -5011,12 +5017,19 @@ char *strjoin(const char *x, ...) {
 
                 for (;;) {
                         const char *t;
+                        size_t n;
 
                         t = va_arg(ap, const char *);
                         if (!t)
                                 break;
 
-                        l += strlen(t);
+                        n = strlen(t);
+                        if (n > ((size_t) -1) - l) {
+                                va_end(ap);
+                                return NULL;
+                        }
+
+                        l += n;
                 }
         } else
                 l = 0;
@@ -5288,7 +5301,7 @@ int signal_from_string(const char *s) {
         int offset = 0;
         unsigned u;
 
-        signo =__signal_from_string(s);
+        signo = __signal_from_string(s);
         if (signo > 0)
                 return signo;
 
@@ -5680,7 +5693,7 @@ void warn_melody(void) {
         if (fd < 0)
                 return;
 
-        /* Yeah, this is synchronous. Kinda sucks. Bute well... */
+        /* Yeah, this is synchronous. Kinda sucks. But well... */
 
         ioctl(fd, KIOCSOUND, (int)(1193180/440));
         usleep(125*USEC_PER_MSEC);