diff options
Diffstat (limited to 'coreutils')
| -rw-r--r-- | coreutils/dd.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/coreutils/dd.c b/coreutils/dd.c index 818ab777e..09e6cccc7 100644 --- a/coreutils/dd.c +++ b/coreutils/dd.c @@ -22,6 +22,7 @@ */ #include <sys/types.h> +#include <sys/stat.h> #include <stdlib.h> #include <stdio.h> #include <unistd.h> @@ -106,8 +107,13 @@ int dd_main(int argc, char **argv) perror_msg_and_die("%s", outfile); if (seek && trunc) { - if (ftruncate(ofd, seek * bs) < 0) - perror_msg_and_die("%s", outfile); + if (ftruncate(ofd, seek * bs) < 0) { + struct stat st; + + if (fstat (ofd, &st) < 0 || S_ISREG (st.st_mode) || + S_ISDIR (st.st_mode)) + perror_msg_and_die("%s", outfile); + } } } else { ofd = STDOUT_FILENO; |