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125 lines
2.4 KiB
125 lines
2.4 KiB
#include <stdio.h>
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#include <time.h>
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#include <getopt.h>
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#include <file.h>
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#include <image.h>
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#include <macros.h>
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#include <option.h>
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#include <pack.h>
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enum {
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OPTION_HELP = 'h',
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OPTION_OUTPUT = 'o',
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};
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struct args {
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const char *input, *output;
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};
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static struct opt_desc opt_descs[] = {
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{ "-o", "--output", "the file to contain the image in ROTS format" },
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{ "-h", "--help", "display this help and exit" },
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{ NULL, NULL, NULL },
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};
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static int parse_args(struct args *args, int argc, char *argv[])
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{
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struct option options[] = {
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{ "help", no_argument, NULL, OPTION_HELP },
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{ "output", required_argument, 0, OPTION_OUTPUT },
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{ NULL, 0, 0, 0 },
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};
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int ret;
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while ((ret = getopt_long(argc, (char * const *)argv, "ho:", options,
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NULL)) >= 0) {
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switch (ret) {
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case OPTION_HELP: return -1;
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case OPTION_OUTPUT: args->output = optarg; break;
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default: return -1;
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}
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}
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if (!args->output)
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return -1;
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if (optind >= argc)
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return -1;
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++optind;
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if (optind >= argc)
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return -1;
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args->input = argv[optind];
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return 0;
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}
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void show_pack_usage(const char *prog_name, const char *cmd)
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{
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fprintf(stderr, "usage: %s %s [option]...\n\n"
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"pack the payload within an image\n\n", prog_name, cmd);
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format_options(opt_descs);
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}
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int do_pack(int argc, char *argv[])
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{
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char data[4096];
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struct rots_hdr hdr;
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struct args args;
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FILE *input, *output;
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size_t nbytes, size;
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if (parse_args(&args, argc, argv) < 0) {
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show_pack_usage(argv[0], argv[1]);
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return -1;
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}
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if (!(input = fopen(args.input, "rb"))) {
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fprintf(stderr, "unable to open '%s' for reading.\n", args.input);
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return -1;
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}
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if (!(output = fopen(args.output, "wb"))) {
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fprintf(stderr, "unable to open '%s' for writing.\n", args.output);
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goto err_close_input;
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}
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get_file_size(&size, args.input);
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hdr.timestamp = (uint64_t)time(NULL);
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hdr.size = size;
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printf("%zu\n", hdr.size);
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if (rots_write_hdr(output, &hdr) < 0)
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goto err_close_output;
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while (size) {
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nbytes = fread(data, sizeof *data, min(sizeof data, size), input);
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if (nbytes == 0) {
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fprintf(stderr, "unable to read the next chunk\n");
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goto err_close_output;
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}
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if (fwrite(data, sizeof *data, nbytes, output) < nbytes) {
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fprintf(stderr, "unable to write the current chunk\n");
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goto err_close_output;
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}
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size -= nbytes;
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}
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fclose(output);
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fclose(input);
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return 0;
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err_close_output:
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fclose(output);
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err_close_input:
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fclose(input);
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return -1;
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}
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