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This commit is contained in:
Rob Landley 2022-04-27 17:26:02 -05:00
parent 5bce20565a
commit e8324105d0
1 changed files with 3 additions and 0 deletions
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3
toys/posix/file.c
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@ -206,6 +206,7 @@ static void do_regular_file(int fd, char *name)
{
char *s = toybuf;
unsigned len, magic;
int ii;
// zero through elf shnum, just in case
memset(s, 0, 80);
@ -215,6 +216,8 @@ static void do_regular_file(int fd, char *name)
// 45 bytes: https://www.muppetlabs.com/~breadbox/software/tiny/teensy.html
else if (len>=45 && strstart(&s, "\177ELF")) do_elf_file(fd);
else if (strstart(&s, "!<arch>\n")) xputs("ar archive");
else if (*s=='%' && 2==sscanf(s, "%%PDF%d.%u", &ii, &magic))
xprintf("PDF document, version %d.%u\n", -ii, magic);
else if (len>28 && strstart(&s, "\x89PNG\x0d\x0a\x1a\x0a")) {
// PNG is big-endian: https://www.w3.org/TR/PNG/#7Integers-and-byte-order
int chunk_length = peek_be(s, 4);