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mkenvimage: Read/Write from/to stdin/out by default or if the filename is "-"

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Signed-off-by: David Wagner <david.wagner@free-electrons.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
David Wagner 2012-01-13 13:27:37 +00:00 committed by Anatolij Gustschin
parent 3d0f9bd034
commit 48995b5a96
1 changed files with 13 additions and 13 deletions
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26
tools/mkenvimage.c
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@ -171,15 +171,9 @@ int main(int argc, char **argv)
memset(envptr, padbyte, envsize); memset(envptr, padbyte, envsize);
/* Open the input file ... */ /* Open the input file ... */
if (optind >= argc) { if (optind >= argc || strcmp(argv[optind], "-") == 0) {
fprintf(stderr, "Please specify an input filename\n");
return EXIT_FAILURE;
}
txt_filename = argv[optind];
if (strcmp(txt_filename, "-") == 0) {
int readbytes = 0; int readbytes = 0;
int readlen = sizeof(*envptr) * 2048; int readlen = sizeof(*envptr) * 4096;
txt_fd = STDIN_FILENO; txt_fd = STDIN_FILENO;
do { do {
@ -198,6 +192,7 @@ int main(int argc, char **argv)
} while (readbytes == readlen); } while (readbytes == readlen);
} else { } else {
txt_filename = argv[optind];
txt_fd = open(txt_filename, O_RDONLY); txt_fd = open(txt_filename, O_RDONLY);
if (txt_fd == -1) { if (txt_fd == -1) {
fprintf(stderr, "Can't open \"%s\": %s\n", 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)); memcpy(dataptr, &targetendian_crc, sizeof(uint32_t));
bin_fd = creat(bin_filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); if (!bin_filename || strcmp(bin_filename, "-") == 0) {
if (bin_fd == -1) { bin_fd = STDOUT_FILENO;
fprintf(stderr, "Can't open output file \"%s\": %s\n", } else {
bin_filename, strerror(errno)); bin_fd = creat(bin_filename, S_IRUSR | S_IWUSR | S_IRGRP |
return EXIT_FAILURE; 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) != if (write(bin_fd, dataptr, sizeof(*dataptr) * datasize) !=