ar.c
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#undef JBJ_WRITEPAD
#include "system.h"
#include <rpmio_internal.h> /* XXX fdGetCpioPos writing AR_MAGIC */
#include <rpmmacro.h>
#include <ugid.h>
#include <ar.h>
#define _IOSM_INTERNAL
#include <iosm.h>
#include "debug.h"
/*@access IOSM_t @*/
/*@unchecked@*/
int _ar_debug = 0;
static int strntoul(const char *str, /*@null@*/ /*@out@*/char **endptr,
int base, size_t num)
/*@modifies *endptr @*/
{
char * buf, * end;
unsigned long ret;
buf = alloca(num + 1);
strncpy(buf, str, num);
buf[num] = '\0';
ret = strtoul(buf, &end, base);
if (endptr != NULL) {
if (*end != '\0')
*endptr = ((char *)str) + (end - buf); /* XXX discards const */
else
*endptr = ((char *)str) + strlen(buf);
}
return ret;
}
/* Translate archive read/write ssize_t return for iosmStage(). */
#define _IOSMRC(_rc) \
if ((_rc) <= 0) return ((_rc) ? (int) -rc : IOSMERR_HDR_TRAILER)
static ssize_t arRead(void * _iosm, void * buf, size_t count)
/*@globals fileSystem @*/
/*@modifies _iosm, *buf, fileSystem @*/
{
IOSM_t iosm = _iosm;
char * t = buf;
size_t nb = 0;
size_t rc;
if (_ar_debug)
fprintf(stderr, "\t arRead(%p, %p[%u])\n", iosm, buf, (unsigned)count);
while (count > 0) {
/* Read next ar block. */
iosm->wrlen = count;
rc = _iosmNext(iosm, IOSM_DREAD);
if (!rc && iosm->rdnb != iosm->wrlen) {
if (iosm->rdnb == 0) return -IOSMERR_HDR_TRAILER; /* EOF */
rc = IOSMERR_READ_FAILED;
}
if (rc) return -rc;
/* Append to buffer. */
rc = (count > iosm->rdnb ? iosm->rdnb : count);
if (buf != iosm->wrbuf)
memcpy(t + nb, iosm->wrbuf, rc);
nb += rc;
count -= rc;
}
return nb;
}
int arHeaderRead(void * _iosm, struct stat * st)
/*@modifies _iosm, *st @*/
{
IOSM_t iosm = _iosm;
arHeader hdr = (arHeader) iosm->wrbuf;
ssize_t rc = 0;
if (_ar_debug)
fprintf(stderr, " arHeaderRead(%p, %p)\n", iosm, st);
/* XXX Read AR_MAGIC to beginning of ar(1) archive. */
if (fdGetCpioPos(iosm->cfd) == 0) {
rc = arRead(iosm, iosm->wrbuf, sizeof(AR_MAGIC)-1);
_IOSMRC(rc);
/* Verify archive magic. */
if (strncmp(iosm->wrbuf, AR_MAGIC, sizeof(AR_MAGIC)-1))
return IOSMERR_BAD_MAGIC;
}
top:
/* Make sure block aligned. */
rc = _iosmNext(iosm, IOSM_POS);
if (rc) return (int) rc;
rc = arRead(iosm, hdr, sizeof(*hdr));
_IOSMRC(rc);
if (_ar_debug)
fprintf(stderr, "==> %p[%u] \"%.*s\"\n", hdr, (unsigned)rc, (int)sizeof(*hdr)-2, (char *)hdr);
/* Verify header marker. */
if (strncmp(hdr->marker, AR_MARKER, sizeof(AR_MARKER)-1))
return IOSMERR_BAD_MAGIC;
st->st_size = strntoul(hdr->filesize, NULL, 10, sizeof(hdr->filesize));
/* Special ar(1) archive members. */
if (hdr->name[0] == '/') {
/* GNU: on "//": Read long member name string table. */
if (hdr->name[1] == '/' && hdr->name[2] == ' ') {
char * t;
size_t i;
rc = arRead(iosm, iosm->wrbuf, st->st_size);
_IOSMRC(rc);
iosm->wrbuf[rc] = '\0';
iosm->lmtab = t = xstrdup(iosm->wrbuf);
iosm->lmtablen = rc;
iosm->lmtaboff = 0;
for (i = 1; i < iosm->lmtablen; i++) {
t++;
if (t[0] != '\n') continue;
t[0] = '\0';
/* GNU: trailing '/' to permit file names with trailing ' '. */
if (t[-1] == '/') t[-1] = '\0';
}
goto top;
}
/* GNU: on "/": Skip symbol table. */
if (hdr->name[1] == ' ') {
rc = arRead(iosm, iosm->wrbuf, st->st_size);
_IOSMRC(rc);
goto top;
}
/* GNU: on "/123": Read "123" offset to substitute long member name. */
if (xisdigit((int)hdr->name[1])) {
char * te = NULL;
int i = strntoul(&hdr->name[1], &te, 10, sizeof(hdr->name)-2);
if (*te == ' ' && iosm->lmtab != NULL && i < (int)iosm->lmtablen)
iosm->path = xstrdup(iosm->lmtab + i);
}
} else
if (hdr->name[0] != ' ') { /* Short member name. */
size_t nb = sizeof(hdr->name);
char t[sizeof(hdr->name)+1];
memcpy(t, hdr->name, nb);
t[nb] = '\0';
while (nb > 0 && t[nb-1] == ' ')
t[--nb] = '\0';
/* GNU: trailing '/' to permit file names with trailing ' '. */
if (nb > 0 && t[nb - 1] == '/')
t[--nb] = '\0';
iosm->path = xstrdup(t);
}
st->st_mtime = strntoul(hdr->mtime, NULL, 10, sizeof(hdr->mtime));
st->st_ctime = st->st_atime = st->st_mtime;
st->st_uid = strntoul(hdr->uid, NULL, 10, sizeof(hdr->uid));
st->st_gid = strntoul(hdr->gid, NULL, 10, sizeof(hdr->gid));
st->st_mode = strntoul(hdr->mode, NULL, 8, sizeof(hdr->mode));
st->st_nlink = 1;
rc = 0;
if (_ar_debug)
fprintf(stderr, "\t %06o%3d (%4d,%4d)%12lu %s\n",
(unsigned)st->st_mode, (int)st->st_nlink,
(int)st->st_uid, (int)st->st_gid, (unsigned long)st->st_size,
(iosm->path ? iosm->path : ""));
return (int) rc;
}
static ssize_t arWrite(void * _iosm, const void *buf, size_t count)
/*@globals fileSystem @*/
/*@modifies _iosm, fileSystem @*/
{
IOSM_t iosm = _iosm;
const char * s = buf;
size_t nb = 0;
size_t rc;
if (_ar_debug)
fprintf(stderr, "\tarWrite(%p, %p[%u])\n", iosm, buf, (unsigned)count);
while (count > 0) {
/* XXX DWRITE uses rdnb for I/O length. */
iosm->rdnb = count;
if (s != iosm->rdbuf)
memmove(iosm->rdbuf, s + nb, iosm->rdnb);
rc = _iosmNext(iosm, IOSM_DWRITE);
if (!rc && iosm->rdnb != iosm->wrnb)
rc = IOSMERR_WRITE_FAILED;
if (rc) return -rc;
nb += iosm->rdnb;
count -= iosm->rdnb;
}
#if defined(JBJ_WRITEPAD)
/* Pad to next block boundary. */
if ((rc = _iosmNext(iosm, IOSM_PAD)) != 0) return -rc;
#endif
return nb;
}
int arHeaderWrite(void * _iosm, struct stat * st)
{
IOSM_t iosm = _iosm;
arHeader hdr = (arHeader) iosm->rdbuf;
size_t nb;
ssize_t rc = 0;
if (_ar_debug)
fprintf(stderr, " arHeaderWrite(%p, %p)\n", iosm, st);
/* At beginning of ar(1) archive, write magic and long member table. */
if (fdGetCpioPos(iosm->cfd) == 0) {
/* Write ar(1) magic. */
rc = arWrite(iosm, AR_MAGIC, sizeof(AR_MAGIC)-1);
_IOSMRC(rc);
/* GNU: on "//": Write long member name string table. */
if (iosm->lmtab != NULL) {
memset(hdr, (int) ' ', sizeof(*hdr));
hdr->name[0] = '/';
hdr->name[1] = '/';
sprintf(hdr->filesize, "%-10d", (unsigned) (iosm->lmtablen & 037777777777));
strncpy(hdr->marker, AR_MARKER, sizeof(AR_MARKER)-1);
rc = arWrite(iosm, hdr, sizeof(*hdr));
_IOSMRC(rc);
rc = arWrite(iosm, iosm->lmtab, iosm->lmtablen);
_IOSMRC(rc);
#if !defined(JBJ_WRITEPAD)
rc = _iosmNext(iosm, IOSM_PAD);
if (rc) return (int)rc;
#endif
}
}
memset(hdr, (int)' ', sizeof(*hdr));
nb = strlen(iosm->path);
if (nb >= sizeof(hdr->name)) {
const char * t;
const char * te;
assert(iosm->lmtab != NULL);
t = iosm->lmtab + iosm->lmtaboff;
te = strchr(t, '\n');
/* GNU: on "/123": Write "/123" offset for long member name. */
nb = snprintf(hdr->name, sizeof(hdr->name)-1, "/%u", (unsigned)iosm->lmtaboff);
hdr->name[nb] = ' ';
if (te != NULL)
iosm->lmtaboff += (te - t) + 1;
} else {
strncpy(hdr->name, iosm->path, nb);
hdr->name[nb] = '/';
}
sprintf(hdr->mtime, "%-12u", (unsigned) (st->st_mtime & 037777777777));
sprintf(hdr->uid, "%-6u", (unsigned int)(st->st_uid & 07777777));
sprintf(hdr->gid, "%-6u", (unsigned int)(st->st_gid & 07777777));
sprintf(hdr->mode, "%-8o", (unsigned int)(st->st_mode & 07777777));
sprintf(hdr->filesize, "%-10u", (unsigned) (st->st_size & 037777777777));
strncpy(hdr->marker, AR_MARKER, sizeof(AR_MARKER)-1);
rc = (int) sizeof(*hdr);
if (_ar_debug)
fprintf(stderr, "==> %p[%u] \"%.*s\"\n", hdr, (unsigned)rc, (int)sizeof(*hdr), (char *)hdr);
rc = arWrite(iosm, hdr, sizeof(*hdr));
_IOSMRC(rc);
rc = 0;
return (int) rc;
}
int arTrailerWrite(void * _iosm)
{
IOSM_t iosm = _iosm;
size_t rc = 0;
if (_ar_debug)
fprintf(stderr, " arTrailerWrite(%p)\n", iosm);
#if defined(JBJ_WRITEPAD)
rc = arWrite(iosm, NULL, 0); /* XXX _iosmNext(iosm, IOSM_PAD) */
_IOSMRC(rc);
#else
rc = _iosmNext(iosm, IOSM_PAD); /* XXX likely unnecessary. */
#endif
return (int) rc;
}