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author | Freya Murphy <freya@freyacat.org> | 2025-03-27 14:35:29 -0400 |
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committer | Freya Murphy <freya@freyacat.org> | 2025-03-27 14:38:43 -0400 |
commit | 6ece4e20acd943b49b05a36f14594ad7413c1897 (patch) | |
tree | 44ccdad86bdc4f1dabd5670f5c096046581c38b7 /util/mkblob.c | |
parent | move user to 0x30000, update kernel.ld (diff) | |
download | comus-6ece4e20acd943b49b05a36f14594ad7413c1897.tar.gz comus-6ece4e20acd943b49b05a36f14594ad7413c1897.tar.bz2 comus-6ece4e20acd943b49b05a36f14594ad7413c1897.zip |
remove trailing whitespace
Diffstat (limited to 'util/mkblob.c')
-rw-r--r-- | util/mkblob.c | 24 |
1 files changed, 9 insertions, 15 deletions
diff --git a/util/mkblob.c b/util/mkblob.c index db7bfc4..fdf0680 100644 --- a/util/mkblob.c +++ b/util/mkblob.c @@ -5,6 +5,7 @@ ** ** Create a binary blob from a collection of ELF files. */ + #define _DEFAULT_SOURCE #include <elf.h> @@ -38,11 +39,11 @@ ** size Size of this ELF file, in bytes ** flags Flags related to this file */ - // blob header typedef struct header_s { char magic[4]; uint32_t num; + } header_t; // length of the file name field @@ -67,8 +68,8 @@ typedef struct node_s { prog_t *data; char *fullname; struct node_s *next; -} node_t; +} node_t; node_t *progs, *last_prog; // list pointers uint32_t n_progs; // number of files being copied uint32_t offset; // current file area offset @@ -114,12 +115,10 @@ void process(const char *name) Elf32_Ehdr hdr; int n = read(fd, &hdr, sizeof(Elf32_Ehdr)); close(fd); - if (n != sizeof(Elf32_Ehdr)) { fprintf(stderr, "%s: header read was short - only %d\n", name, n); return; } - if (hdr.e_ident[EI_MAG0] != ELFMAG0 || hdr.e_ident[EI_MAG1] != ELFMAG1 || hdr.e_ident[EI_MAG2] != ELFMAG2 || hdr.e_ident[EI_MAG3] != ELFMAG3) { fprintf(stderr, "%s: bad ELF magic number\n", name); @@ -132,14 +131,12 @@ void process(const char *name) fprintf(stderr, "%s: calloc prog returned NULL\n", name); return; } - node_t *node = calloc(1, sizeof(node_t)); if (node == NULL) { free(new); fprintf(stderr, "%s: calloc node returned NULL\n", name); return; } - node->data = new; node->fullname = strdup(name); @@ -150,11 +147,11 @@ void process(const char *name) if (slash == NULL) { // only the file name slash = name; + } else { // skip the slash ++slash; } - strncpy(new->name, slash, sizeof(new->name) - 1); new->offset = offset; new->size = info.st_size; @@ -167,6 +164,7 @@ void process(const char *name) if ((info.st_size & FSIZE_MASK) != 0) { // nope, so we must round it up when we write it out new->flags |= FL_ROUNDUP; + // increases the offset to the next file offset += 8 - (info.st_size & FSIZE_MASK); } @@ -175,6 +173,7 @@ void process(const char *name) if (progs == NULL) { // first entry progs = node; + } else { // add to the end if (last_prog == NULL) { @@ -207,23 +206,24 @@ void copy(FILE *ofd, node_t *node) perror(node->fullname); return; } - uint8_t buf[512]; // copy it block-by-block do { int n = read(fd, buf, 512); + // no bytes --> we're done if (n < 1) { break; } + // copy it, and verify the copy count int k = fwrite(buf, 1, n, ofd); if (k != n) { fprintf(stderr, "%s: write of %d returned %d\n", prog->name, n, k); } - } while (1); + } while (1); printf("%s: copied %d", prog->name, prog->size); // do we need to round up? @@ -249,14 +249,12 @@ void copy(FILE *ofd, node_t *node) // all done! close(fd); } - int main(int argc, char *argv[]) { // construct program list for (int i = 1; i < argc; ++i) { process(argv[i]); } - if (n_progs < 1) { fputs("Nothing to do... exiting.", stderr); exit(0); @@ -269,14 +267,12 @@ int main(int argc, char *argv[]) perror("user.img"); exit(1); } - printf("Processing %d ELF files\n", n_progs); // we need to adjust the offset values so they are relative to the // start of the blob, not relative to the start of the file area. // do this by adding the sum of the file header and program entries // to each offset field. - uint32_t hlen = sizeof(header_t) + n_progs * sizeof(prog_t); node_t *curr = progs; while (curr != NULL) { @@ -314,8 +310,6 @@ int main(int argc, char *argv[]) free(tmp->fullname); free(tmp); } - fclose(ofd); - return 0; } |