o5r/plan9port
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

no anon union

Browse source
This commit is contained in:
rsc 2006-03-31 14:37:04 +00:00
parent 6019a96c78
commit 613093289d
1 changed files with 29 additions and 28 deletions
Download patch file Download diff file Expand all files Collapse all files

57
src/cmd/tar.c
View file

@ -78,31 +78,30 @@ enum {
#define isreallink(lf) ((lf) == LF_LINK)
#define issymlink(lf) ((lf) == LF_SYMLINK1 || (lf) == LF_SYMLINK2)
typedef union {
uchar data[Tblock];
struct {
char name[Namsiz];
char mode[8];
char uid[8];
char gid[8];
char size[12];
char mtime[12];
char chksum[8];
char linkflag;
char linkname[Namsiz];
typedef struct Hdr {
char name[Namsiz];
char mode[8];
char uid[8];
char gid[8];
char size[12];
char mtime[12];
char chksum[8];
char linkflag;
char linkname[Namsiz];
/* rest are defined by POSIX's ustar format; see p1003.2b */
char magic[6]; /* "ustar" */
char version[2];
char uname[32];
char gname[32];
char devmajor[8];
char devminor[8];
char prefix[Maxpfx]; /* if non-null, path= prefix "/" name */
};
/* rest are defined by POSIX's ustar format; see p1003.2b */
char magic[6]; /* "ustar" */
char version[2];
char uname[32];
char gname[32];
char devmajor[8];
char devminor[8];
char prefix[Maxpfx]; /* if non-null, path= prefix "/" name */
char pad[12];
} Hdr;
typedef struct {
typedef struct Compress {
char *comp;
char *decomp;
char *sfx[4];
@ -115,7 +114,7 @@ static Compress comps[] = {
".tar.bz2",".tbz2" },
};
typedef struct {
typedef struct Pushstate {
int kid;
int fd; /* original fd */
int rfd; /* replacement fd */
@ -327,7 +326,7 @@ getblkz(int ar)
Hdr *hp = getblke(ar);
if (hp != nil)
memset(hp->data, 0, Tblock);
memset(hp, 0, Tblock);
return hp;
}
@ -400,7 +399,7 @@ chksum(Hdr *hp)
{
int n = Tblock;
long i = 0;
uchar *cp = hp->data;
uchar *cp = (uchar*)hp;
char oldsum[sizeof hp->chksum];
memmove(oldsum, hp->chksum, sizeof oldsum);
@ -736,7 +735,7 @@ addtoar(int ar, char *file, char *shortf)
hbp = getblke(ar);
blksread = gothowmany(blksleft);
bytes = blksread * Tblock;
n = readn(fd, hbp->data, bytes);
n = readn(fd, hbp, bytes);
if (n < 0)
sysfatal("error reading %s: %r", file);
/*
@ -744,7 +743,7 @@ addtoar(int ar, char *file, char *shortf)
* compression and emergency recovery of data.
*/
if (n < Tblock)
memset(hbp->data + n, 0, bytes - n);
memset((uchar*)hbp + n, 0, bytes - n);
putblkmany(ar, blksread);
}
close(fd);
@ -1008,7 +1007,7 @@ extract1(int ar, Hdr *hp, char *fname)
wrbytes = Tblock*blksread;
if(wrbytes > bytes)
wrbytes = bytes;
if (fd >= 0 && write(fd, hbp->data, wrbytes) != wrbytes)
if (fd >= 0 && write(fd, hbp, wrbytes) != wrbytes)
sysfatal("write error on %s: %r", fname);
putreadblks(ar, blksread);
bytes -= wrbytes;
@ -1097,6 +1096,8 @@ main(int argc, char *argv[])
fmtinstall('M', dirmodefmt);
if(sizeof(Hdr) != Tblock)
sysfatal("padding in hdr should be %d", Tblock-sizeof(Hdr)+sizeof(curblk->pad));
TARGBEGIN {
case 'c':
docreate++;