diff options
| -rw-r--r-- | toys/pending/file.c | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/toys/pending/file.c b/toys/pending/file.c index 2a62f789..85af0981 100644 --- a/toys/pending/file.c +++ b/toys/pending/file.c @@ -131,6 +131,7 @@ static void do_regular_file(int fd, char *name) { char *s; int len = read(fd, s = toybuf, sizeof(toybuf)-256); + int magic; if (len<0) perror_msg("%s", name); @@ -171,9 +172,32 @@ static void do_regular_file(int fd, char *name) xprintf("Java class file, version %d.%d\n", (int)peek_be(s+6, 2), (int)peek_be(s, 2)); - // TODO: cpio archive. - // TODO: tar archive. - // TODO: zip/jar/apk archive. + // https://people.freebsd.org/~kientzle/libarchive/man/cpio.5.txt + // the lengths for cpio are size of header + 9 bytes, since any valid + // cpio archive ends with a record for "TARGET!!!" + else if (len>85 && strstart(&s, "07070")) { + char *cpioformat = "unknown type"; + if (toybuf[5] == '7') cpioformat = "pre-SVR4 or odc"; + else if (toybuf[5] == '1') cpioformat = "SVR4 with no CRC"; + else if (toybuf[5] == '2') cpioformat = "SVR4 with CRC"; + xprintf("ASCII cpio archive (%s)\n", cpioformat); + } + else if (len>33 && (magic=peek(&s,2), magic==0143561 || magic==070707)) { + if (magic == 0143561) printf("byte-swapped "); + xprintf("cpio archive\n"); + } + // tar archive (ustar/pax or gnu) + else if (len>500 && !strncmp(s+257, "ustar", 5)) { + xprintf("POSIX tar archive%s\n", strncmp(s+262," ",2)?"":" (GNU)"); + } + // zip/jar/apk archive, ODF/OOXML document, or such + else if (len>5 && strstart(&s, "PK\03\04")) { + int ver = (int)(char)(toybuf[4]); + xprintf("Zip archive data"); + if (ver) + xprintf(", requires at least v%d.%d to extract", ver/10, ver%10); + xputc('\n'); + } else { char *what = 0; int i, bytes; |