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Allow checksumming multiple files, and print filenames with the checksums.

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This commit is contained in:
Stephen Heumann 2017-11-19 23:41:05 -06:00
parent 0475dbf132
commit e288a7bc83
1 changed files with 29 additions and 27 deletions
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52
cksumcommon.h
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@ -34,43 +34,45 @@ int main(int argc, char **argv) {
struct concat(HASH_FUNCTION,_context) ctx;
FILE *file;
size_t count;
int i;
int i, n;
srand(time(NULL));
if (argc != 2) {
fprintf(stderr, "Usage: %s filename\n", argv[0]);
if (argc < 2) {
fprintf(stderr, "Usage: %s filename ...\n", argv[0]);
return EXIT_FAILURE;
}
file = fopen(argv[1], "rb");
if (file == NULL) {
perror(argv[1]);
return EXIT_FAILURE;
}
for (n = 1; n < argc; n++) {
file = fopen(argv[n], "rb");
if (file == NULL) {
perror(argv[n]);
return EXIT_FAILURE;
}
concat(HASH_FUNCTION,_init)(&ctx);
do {
concat(HASH_FUNCTION,_init)(&ctx);
do {
#ifdef RANDOMIZE_READ_SIZE
count = (rand() & 0x7FFF) + 1;
count = (rand() & 0x7FFF) + 1;
#else
count = 0x8000ul;
count = 0x8000ul;
#endif
count = fread(buf, 1, count, file);
concat(HASH_FUNCTION,_update)(&ctx, buf, count);
} while (count != 0);
count = fread(buf, 1, count, file);
concat(HASH_FUNCTION,_update)(&ctx, buf, count);
} while (count != 0);
if (ferror(file)) {
fprintf(stderr, "Error reading file\n");
if (ferror(file)) {
fprintf(stderr, "Error reading file\n");
}
fclose(file);
concat(HASH_FUNCTION,_finalize)(&ctx);
for (i = 0; i < sizeof(ctx.hash); i++) {
printf("%02x", ctx.hash[i]);
}
printf(" %s\n", argv[n]);
}
fclose(file);
concat(HASH_FUNCTION,_finalize)(&ctx);
for (i = 0; i < sizeof(ctx.hash); i++) {
printf("%02x", ctx.hash[i]);
}
printf("\n");
return 0;
}