diff options
| author | David Wagner <david.wagner@free-electrons.com> | 2012-01-13 13:27:37 +0000 |
|---|---|---|
| committer | Anatolij Gustschin <agust@denx.de> | 2012-03-27 10:05:05 +0200 |
| commit | 48995b5a96c99ba6243906ecab733e4269fbafe5 (patch) | |
| tree | 6234fa785e9483d9b2a1a1719e116557ca4d7b55 /tools/mkenvimage.c | |
| parent | 3d0f9bd0349712223d5be40aa69f4ca1a1965a3e (diff) | |
| download | u-boot-48995b5a96c99ba6243906ecab733e4269fbafe5.tar.gz | |
mkenvimage: Read/Write from/to stdin/out by default or if the filename is "-"
Signed-off-by: David Wagner <david.wagner@free-electrons.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'tools/mkenvimage.c')
| -rw-r--r-- | tools/mkenvimage.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/tools/mkenvimage.c b/tools/mkenvimage.c index b6879bcef7..032dc83652 100644 --- a/tools/mkenvimage.c +++ b/tools/mkenvimage.c @@ -171,15 +171,9 @@ int main(int argc, char **argv) memset(envptr, padbyte, envsize); /* Open the input file ... */ - if (optind >= argc) { - fprintf(stderr, "Please specify an input filename\n"); - return EXIT_FAILURE; - } - - txt_filename = argv[optind]; - if (strcmp(txt_filename, "-") == 0) { + if (optind >= argc || strcmp(argv[optind], "-") == 0) { int readbytes = 0; - int readlen = sizeof(*envptr) * 2048; + int readlen = sizeof(*envptr) * 4096; txt_fd = STDIN_FILENO; do { @@ -198,6 +192,7 @@ int main(int argc, char **argv) } while (readbytes == readlen); } else { + txt_filename = argv[optind]; txt_fd = open(txt_filename, O_RDONLY); if (txt_fd == -1) { fprintf(stderr, "Can't open \"%s\": %s\n", @@ -287,11 +282,16 @@ int main(int argc, char **argv) memcpy(dataptr, &targetendian_crc, sizeof(uint32_t)); - bin_fd = creat(bin_filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); - if (bin_fd == -1) { - fprintf(stderr, "Can't open output file \"%s\": %s\n", - bin_filename, strerror(errno)); - return EXIT_FAILURE; + if (!bin_filename || strcmp(bin_filename, "-") == 0) { + bin_fd = STDOUT_FILENO; + } else { + bin_fd = creat(bin_filename, S_IRUSR | S_IWUSR | S_IRGRP | + S_IWGRP); + if (bin_fd == -1) { + fprintf(stderr, "Can't open output file \"%s\": %s\n", + bin_filename, strerror(errno)); + return EXIT_FAILURE; + } } if (write(bin_fd, dataptr, sizeof(*dataptr) * datasize) != |