diff options
Diffstat (limited to 'toys')
| -rw-r--r-- | toys/pending/tar.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/toys/pending/tar.c b/toys/pending/tar.c index bff8b540..f7559b60 100644 --- a/toys/pending/tar.c +++ b/toys/pending/tar.c @@ -77,7 +77,7 @@ struct tar_hdr { prefix[155], padd[12]; }; -// convert to int to octal (or base-256) +// convert from int to octal (or base-256) static void itoo(char *str, int len, unsigned long long val) { // Do we need binary encoding? @@ -103,6 +103,7 @@ static unsigned long long otoi(char *str, unsigned len) return val; } +#define OTOI(x) otoi(x, sizeof(x)) // Calculate packet checksum, with cksum field treated as 8 spaces static unsigned cksum(void *data) @@ -172,6 +173,7 @@ static void alloread(void *buf, int len) b[len] = 0; } +// callback from dirtree to create archive static int add_to_tar(struct dirtree *node) { struct stat *st = &(node->st); @@ -195,7 +197,7 @@ static int add_to_tar(struct dirtree *node) if ((p == name || p[-1] == '/') && *p != '/' && filter(TT.excl, p)) goto done; - // The 1 extra byte from dirtree_path() + // Consume the 1 extra byte alocated in dirtree_path() if (S_ISDIR(st->st_mode) && name[i-1] != '/') strcat(name, "/"); // remove leading / and any .. entries from saved name @@ -282,6 +284,7 @@ static int add_to_tar(struct dirtree *node) } if (strlen(hname) > sizeof(hdr.name)) write_longname(hname, 'L'); + if (!FLAG(numeric_owner)) { if (TT.owner || (pw = bufgetpwuid(st->st_uid))) strncpy(hdr.uname, TT.owner ? TT.owner : pw->pw_name, sizeof(hdr.uname)); @@ -501,9 +504,8 @@ static void unpack_tar(void) // Is this a valid Unix Standard TAR header? if (memcmp(tar.magic, "ustar", 5)) error_exit("bad header"); - if (cksum(&tar) != otoi(tar.chksum, sizeof(tar.chksum))) - error_exit("bad cksum"); - TT.hdr.size = otoi(tar.size, sizeof(tar.size)); + if (cksum(&tar) != OTOI(tar.chksum)) error_exit("bad cksum"); + TT.hdr.size = OTOI(tar.size); // If this header isn't writing something to the filesystem if (tar.type<'0' || tar.type>'7') { @@ -538,13 +540,13 @@ static void unpack_tar(void) } // At this point, we have something to output. Convert metadata. - TT.hdr.mode = otoi(tar.mode, sizeof(tar.mode)); + TT.hdr.mode = OTOI(tar.mode); TT.hdr.mode |= (char []){8,8,10,2,6,4,1,8}[tar.type-'0']<<12; - TT.hdr.uid = otoi(tar.uid, sizeof(tar.uid)); - TT.hdr.gid = otoi(tar.gid, sizeof(tar.gid)); - TT.hdr.mtime = otoi(tar.mtime, sizeof(tar.mtime)); - maj = otoi(tar.major, sizeof(tar.major)); - min = otoi(tar.minor, sizeof(tar.minor)); + TT.hdr.uid = OTOI(tar.uid); + TT.hdr.gid = OTOI(tar.gid); + TT.hdr.mtime = OTOI(tar.mtime); + maj = OTOI(tar.major); + min = OTOI(tar.minor); TT.hdr.device = dev_makedev(maj, min); TT.hdr.uname = xstrndup(TT.owner ? TT.owner : tar.uname, sizeof(tar.uname)); |