As long as Android's going to require fortify, fixup the warnings it generates.

3 files changed, 24 insertions, 11 deletions

diff --git a/toys/posix/cp.c b/toys/posix/cp.c
index 07a8f05b..9e83cb80 100644
--- a/toys/posix/cp.c
+++ b/toys/posix/cp.c
@@ -261,6 +261,7 @@ int cp_node(struct dirtree *try)
   if (fdout != -1) {
     if (flags & (FLAG_a|FLAG_p)) {
       struct timespec times[2];
+      int rc;
 
       // Inability to set these isn't fatal, some require root access.
 
@@ -268,13 +269,20 @@ int cp_node(struct dirtree *try)
       times[1] = try->st.st_mtim;
 
       // If we can't get a filehandle to the actual object, use racy functions
-      if (fdout == AT_FDCWD) {
-        fchownat(cfd, catch, try->st.st_uid, try->st.st_gid,
-                 AT_SYMLINK_NOFOLLOW);
-        utimensat(cfd, catch, times, AT_SYMLINK_NOFOLLOW);
-        // permission bits already correct for mknod, don't apply to symlink
-      } else {
-        fchown(fdout, try->st.st_uid, try->st.st_gid);
+      if (fdout == AT_FDCWD)
+        rc = fchownat(cfd, catch, try->st.st_uid, try->st.st_gid,
+                      AT_SYMLINK_NOFOLLOW);
+      else rc = fchown(fdout, try->st.st_uid, try->st.st_gid);
+      if (rc) {
+        char *pp;
+
+        perror_msg("chown '%s'", pp = dirtree_path(try, 0));
+        free(pp);
+      }
+
+      // permission bits already correct for mknod and don't apply to symlink
+      if (fdout == AT_FDCWD) utimensat(cfd, catch, times, AT_SYMLINK_NOFOLLOW);
+      else {
         futimens(fdout, times);
         fchmod(fdout, try->st.st_mode);
       }
diff --git a/toys/posix/cpio.c b/toys/posix/cpio.c
index 2a0f7d92..312bb939 100644
--- a/toys/posix/cpio.c
+++ b/toys/posix/cpio.c
@@ -256,7 +256,7 @@ void cpio_main(void)
           xwrite(afd, toybuf, nlen);
         }
         llen = st.st_size & 3;
-        if (llen) write(afd, &zero, 4-llen);
+        if (llen) xwrite(afd, &zero, 4-llen);
       }
       close(fd);
     }
diff --git a/toys/posix/find.c b/toys/posix/find.c
index caec80e9..370220e8 100644
--- a/toys/posix/find.c
+++ b/toys/posix/find.c
@@ -72,7 +72,7 @@ static int flush_exec(struct dirtree *new, struct exec_range *aa)
 {
   struct double_list **dl;
   char **newargs;
-  int rc;
+  int rc = 0;
 
   if (!aa->namecount) return 0;
 
@@ -82,8 +82,13 @@ static int flush_exec(struct dirtree *new, struct exec_range *aa)
 
   // switch to directory for -execdir, or back to top if we have an -execdir
   // _and_ a normal -exec, or are at top of tree in -execdir
-  if (aa->dir && new->parent) fchdir(new->parent->data);
-  else if (TT.topdir != -1) fchdir(TT.topdir);
+  if (aa->dir && new->parent) rc = fchdir(new->parent->data);
+  else if (TT.topdir != -1) rc = fchdir(TT.topdir);
+  if (rc) {
+    perror_msg("%s", new->name);
+
+    return rc;
+  }
 
   // execdir: accumulated execs in this directory's children.
   newargs = xmalloc(sizeof(char *)*(aa->arglen+aa->namecount+1));