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mkimg: Add support for offset if the source is an image

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This allow us to create image with the following format:
mkimg -v -o sdcard -s gpt -p efi:=esp_aarch64.img:1M -p freebsd-ufs::1G

Which will add a efi partition at a 1M offset on the image with its content
coming from the esp_aarch64.img file.

MFC after:	3 days
This commit is contained in:
Emmanuel Vadot 2021-02-25 18:10:19 +01:00
parent 655fa04406
commit 8f3c71c85e
1 changed files with 11 additions and 8 deletions
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19
usr.bin/mkimg/mkimg.c
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@ -174,8 +174,10 @@ usage(const char *why)
fprintf(stderr, "\t<t>[/<l>]::<size>[:[+]<offset>]\t- "
"empty partition of given size and\n\t\t\t\t\t"
" optional relative or absolute offset\n");
fprintf(stderr, "\t<t>[/<l>]:=<file>\t\t- partition content and size "
"are\n\t\t\t\t\t determined by the named file\n");
fprintf(stderr, "\t<t>[/<l>]:=<file>[:[+]offset]\t- partition "
"content and size are\n\t\t\t\t\t"
" determined by the named file and\n"
"\t\t\t\t\t optional relative or absolute offset\n");
fprintf(stderr, "\t<t>[/<l>]:-<cmd>\t\t- partition content and size "
"are taken\n\t\t\t\t\t from the output of the command to run\n");
fprintf(stderr, "\t-\t\t\t\t- unused partition entry\n");
@ -459,9 +461,11 @@ mkimg(void)
/* Look for an offset. Set size too if we can. */
switch (part->kind) {
case PART_KIND_SIZE:
case PART_KIND_FILE:
offset = part->contents;
size = strsep(&offset, ":");
if (expand_number(size, &bytesize) == -1)
if (part->kind == PART_KIND_SIZE &&
expand_number(size, &bytesize) == -1)
error = errno;
if (offset != NULL) {
if (*offset != '+')
@ -476,14 +480,13 @@ mkimg(void)
/* Work out exactly where the partition starts. */
blkoffset = (byteoffset + secsz - 1) / secsz;
if (abs_offset) {
part->block = scheme_metadata(SCHEME_META_PART_ABSOLUTE,
if (abs_offset)
block = scheme_metadata(SCHEME_META_PART_ABSOLUTE,
blkoffset);
} else {
else
block = scheme_metadata(SCHEME_META_PART_BEFORE,
block + blkoffset);
part->block = block;
}
part->block = block;
if (verbose)
fprintf(stderr, "partition %d: starting block %llu "