mirror of
https://salsa.debian.org/srivasta/make-dfsg.git
synced 2024-12-27 23:06:54 +00:00
432 lines
10 KiB
C
432 lines
10 KiB
C
/* Library function for scanning an archive file.
|
||
Copyright (C) 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2, or (at your option)
|
||
any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||
|
||
#include "make.h"
|
||
#if defined (USG) || defined (POSIX)
|
||
#include <fcntl.h>
|
||
#else
|
||
#include <sys/file.h>
|
||
#endif
|
||
|
||
#ifndef NO_ARCHIVES
|
||
|
||
/* On the sun386i and in System V rel 3, ar.h defines two different archive
|
||
formats depending upon whether you have defined PORTAR (normal) or PORT5AR
|
||
(System V Release 1). There is no default, one or the other must be defined
|
||
to have a nonzero value. */
|
||
|
||
#if (defined(sun386) || defined(USGr3) || defined(HPUX) \
|
||
&& !defined(PORTAR) && !defined(PORT5AR))
|
||
#define PORTAR 1
|
||
#endif
|
||
|
||
#include <ar.h>
|
||
|
||
#ifndef AIAMAG
|
||
#if (defined(APOLLO) || defined(HPUX) || defined(hpux) || \
|
||
(PORTAR == 1 && (defined(USGr3) || defined(u3b2) || defined(sun386))))
|
||
#define AR_NAMELEN 14
|
||
#define AR_TRAILING_SLASH /* Member names have a trailing slash. */
|
||
#else
|
||
#define AR_NAMELEN 15
|
||
#endif
|
||
#else /* AIX. */
|
||
#define AR_NAMELEN 255
|
||
#endif
|
||
|
||
/* Cray's <ar.h> apparently defines this. */
|
||
#ifndef AR_HDR_SIZE
|
||
#define AR_HDR_SIZE (sizeof (struct ar_hdr))
|
||
#endif
|
||
|
||
/* Takes three arguments ARCHIVE, FUNCTION and ARG.
|
||
|
||
Open the archive named ARCHIVE, find its members one by one,
|
||
and for each one call FUNCTION with the following arguments:
|
||
archive file descriptor for reading the data,
|
||
member name,
|
||
member header position in file,
|
||
member data position in file,
|
||
member data size,
|
||
member date,
|
||
member uid,
|
||
member gid,
|
||
member protection mode,
|
||
ARG.
|
||
|
||
The descriptor is poised to read the data of the member
|
||
when FUNCTION is called. It does not matter how much
|
||
data FUNCTION reads.
|
||
|
||
If FUNCTION returns nonzero, we immediately return
|
||
what FUNCTION returned.
|
||
|
||
Returns -1 if archive does not exist,
|
||
Returns -2 if archive has invalid format.
|
||
Returns 0 if have scanned successfully. */
|
||
|
||
long int
|
||
ar_scan (archive, function, arg)
|
||
char *archive;
|
||
long int (*function) ();
|
||
long int arg;
|
||
{
|
||
#ifdef AIAMAG
|
||
FL_HDR fl_header;
|
||
#endif
|
||
register int desc = open (archive, O_RDONLY, 0);
|
||
if (desc < 0)
|
||
return -1;
|
||
#ifdef SARMAG
|
||
{
|
||
char buf[SARMAG];
|
||
register int nread = read (desc, buf, SARMAG);
|
||
if (nread != SARMAG || bcmp (buf, ARMAG, SARMAG))
|
||
{
|
||
(void) close (desc);
|
||
return -2;
|
||
}
|
||
}
|
||
#else
|
||
#ifdef AIAMAG
|
||
{
|
||
register int nread = read (desc, &fl_header, FL_HSZ);
|
||
if (nread != FL_HSZ || bcmp (fl_header.fl_magic, AIAMAG, SAIAMAG))
|
||
{
|
||
(void) close (desc);
|
||
return -2;
|
||
}
|
||
}
|
||
#else
|
||
{
|
||
#ifndef M_XENIX
|
||
int buf;
|
||
#else
|
||
unsigned short int buf;
|
||
#endif
|
||
register int nread = read(desc, &buf, sizeof (buf));
|
||
if (nread != sizeof (buf) || buf != ARMAG)
|
||
{
|
||
(void) close (desc);
|
||
return -2;
|
||
}
|
||
}
|
||
#endif
|
||
#endif
|
||
|
||
/* Now find the members one by one. */
|
||
{
|
||
#ifdef SARMAG
|
||
register long int member_offset = SARMAG;
|
||
#else
|
||
#ifdef AIAMAG
|
||
long int member_offset;
|
||
long int last_member_offset;
|
||
|
||
sscanf (fl_header.fl_fstmoff, "%12ld", &member_offset);
|
||
sscanf (fl_header.fl_lstmoff, "%12ld", &last_member_offset);
|
||
#else
|
||
#ifndef M_XENIX
|
||
register long int member_offset = sizeof (int);
|
||
#else /* Xenix. */
|
||
register long int member_offset = sizeof (unsigned short int);
|
||
#endif /* Not Xenix. */
|
||
#endif
|
||
#endif
|
||
|
||
while (1)
|
||
{
|
||
register int nread;
|
||
struct ar_hdr member_header;
|
||
#ifdef AIAMAG
|
||
char name[AR_NAMELEN + 1];
|
||
int name_len;
|
||
long int dateval;
|
||
int uidval, gidval;
|
||
long int data_offset;
|
||
#else
|
||
char name[sizeof member_header.ar_name + 1];
|
||
#endif
|
||
long int eltsize;
|
||
int eltmode;
|
||
long int fnval;
|
||
|
||
if (lseek (desc, member_offset, 0) < 0)
|
||
{
|
||
(void) close (desc);
|
||
return -2;
|
||
}
|
||
|
||
#ifdef AIAMAG
|
||
#define AR_MEMHDR \
|
||
(AR_HDR_SIZE - sizeof (member_header._ar_name))
|
||
nread = read (desc, (char *) &member_header, AR_MEMHDR);
|
||
|
||
if (nread != AR_MEMHDR)
|
||
{
|
||
(void) close (desc);
|
||
return -2;
|
||
}
|
||
|
||
sscanf (member_header.ar_namlen, "%4d", &name_len);
|
||
nread = read (desc, name, name_len);
|
||
|
||
if (nread != name_len)
|
||
{
|
||
(void) close (desc);
|
||
return -2;
|
||
}
|
||
|
||
name[name_len] = 0;
|
||
|
||
sscanf (member_header.ar_date, "%12ld", &dateval);
|
||
sscanf (member_header.ar_uid, "%12d", &uidval);
|
||
sscanf (member_header.ar_gid, "%12d", &gidval);
|
||
sscanf (member_header.ar_mode, "%12o", &eltmode);
|
||
sscanf (member_header.ar_size, "%12ld", &eltsize);
|
||
|
||
if ((data_offset = member_offset + AR_MEMHDR + name_len + 2) % 2)
|
||
++data_offset;
|
||
|
||
fnval =
|
||
(*function) (desc, name, member_offset, data_offset, eltsize,
|
||
dateval, uidval, gidval,
|
||
eltmode, arg);
|
||
|
||
#else
|
||
nread = read (desc, (char *) &member_header, AR_HDR_SIZE);
|
||
if (nread == 0)
|
||
/* No data left means end of file; that is OK. */
|
||
break;
|
||
|
||
if (nread != AR_HDR_SIZE
|
||
#ifdef ARFMAG
|
||
|| bcmp (member_header.ar_fmag, ARFMAG, 2)
|
||
#endif
|
||
)
|
||
{
|
||
(void) close (desc);
|
||
return -2;
|
||
}
|
||
|
||
bcopy (member_header.ar_name, name, sizeof member_header.ar_name);
|
||
{
|
||
register char *p = name + sizeof member_header.ar_name;
|
||
while (p > name && *--p == ' ')
|
||
*p = '\0';
|
||
#ifdef AR_TRAILING_SLASH
|
||
if (*p == '/')
|
||
*p = '\0';
|
||
#endif
|
||
}
|
||
|
||
#ifndef M_XENIX
|
||
sscanf (member_header.ar_mode, "%o", &eltmode);
|
||
eltsize = atol (member_header.ar_size);
|
||
#else /* Xenix. */
|
||
eltmode = (unsigned short int) member_header.ar_mode;
|
||
eltsize = member_header.ar_size;
|
||
#endif /* Not Xenix. */
|
||
|
||
fnval =
|
||
(*function) (desc, name, member_offset,
|
||
member_offset + AR_HDR_SIZE, eltsize,
|
||
#ifndef M_XENIX
|
||
atol (member_header.ar_date),
|
||
atoi (member_header.ar_uid),
|
||
atoi (member_header.ar_gid),
|
||
#else /* Xenix. */
|
||
member_header.ar_date,
|
||
member_header.ar_uid,
|
||
member_header.ar_gid,
|
||
#endif /* Not Xenix. */
|
||
eltmode, arg);
|
||
|
||
#endif /* Not AIAMAG */
|
||
|
||
if (fnval)
|
||
{
|
||
(void) close (desc);
|
||
return fnval;
|
||
}
|
||
|
||
#ifdef AIAMAG
|
||
if (member_offset == last_member_offset) /* end of chain? */
|
||
break;
|
||
|
||
sscanf (member_header.ar_nxtmem, "%12ld", &member_offset);
|
||
|
||
if (lseek (desc, member_offset, 0) != member_offset)
|
||
{
|
||
(void) close (desc);
|
||
return -2;
|
||
}
|
||
#else
|
||
member_offset += AR_HDR_SIZE + eltsize;
|
||
if (member_offset & 1) member_offset++;
|
||
#endif
|
||
}
|
||
}
|
||
|
||
close (desc);
|
||
return 0;
|
||
}
|
||
|
||
/* Return nonzero iff NAME matches MEM. If NAME is longer than
|
||
sizeof (struct ar_hdr.ar_name), MEM may be the truncated version. */
|
||
|
||
int
|
||
ar_name_equal (name, mem)
|
||
char *name, *mem;
|
||
{
|
||
char *p;
|
||
|
||
p = rindex (name, '/');
|
||
if (p != 0)
|
||
name = p + 1;
|
||
|
||
#ifndef APOLLO
|
||
|
||
if (!strncmp (name, mem, AR_NAMELEN))
|
||
return 1;
|
||
|
||
if (!strncmp (name, mem, AR_NAMELEN - 2))
|
||
{
|
||
unsigned int namelen, memlen;
|
||
|
||
namelen = strlen (name);
|
||
memlen = strlen (mem);
|
||
|
||
if (memlen == AR_NAMELEN
|
||
&& mem[AR_NAMELEN - 2] == '.' && mem[AR_NAMELEN - 1] == 'o'
|
||
&& name[namelen - 2] == '.' && name[namelen -1] == 'o')
|
||
return 1;
|
||
}
|
||
return 0;
|
||
|
||
#else /* APOLLO. */
|
||
return !strcmp (name, mem);
|
||
#endif
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static long int
|
||
ar_member_pos (desc, mem, hdrpos, datapos, size, date, uid, gid, mode, name)
|
||
int desc;
|
||
char *mem;
|
||
long int hdrpos, datapos, size, date;
|
||
int uid, gid, mode;
|
||
char *name;
|
||
{
|
||
if (!ar_name_equal (name, mem))
|
||
return 0;
|
||
return hdrpos;
|
||
}
|
||
|
||
/* Set date of member MEMNAME in archive ARNAME to current time.
|
||
Returns 0 if successful,
|
||
-1 if file ARNAME does not exist,
|
||
-2 if not a valid archive,
|
||
-3 if other random system call error (including file read-only),
|
||
1 if valid but member MEMNAME does not exist. */
|
||
|
||
int
|
||
ar_member_touch (arname, memname)
|
||
char *arname, *memname;
|
||
{
|
||
register long int pos = ar_scan (arname, ar_member_pos, (long int) memname);
|
||
register int fd;
|
||
struct ar_hdr ar_hdr;
|
||
register int i;
|
||
extern int errno;
|
||
struct stat statbuf;
|
||
|
||
if (pos < 0)
|
||
return (int) pos;
|
||
if (!pos)
|
||
return 1;
|
||
|
||
fd = open (arname, O_RDWR, 0666);
|
||
if (fd < 0)
|
||
return -3;
|
||
/* Read in this member's header */
|
||
if (lseek (fd, pos, 0) < 0)
|
||
goto lose;
|
||
if (AR_HDR_SIZE != read (fd, (char *) &ar_hdr, AR_HDR_SIZE))
|
||
goto lose;
|
||
/* Write back the header, thus touching the archive file. */
|
||
if (lseek (fd, pos, 0) < 0)
|
||
goto lose;
|
||
if (AR_HDR_SIZE != write (fd, (char *) &ar_hdr, AR_HDR_SIZE))
|
||
goto lose;
|
||
/* The file's mtime is the time we we want. */
|
||
fstat (fd, &statbuf);
|
||
#if defined(ARFMAG) || defined(AIAMAG)
|
||
/* Advance member's time to that time */
|
||
for (i = 0; i < sizeof ar_hdr.ar_date; i++)
|
||
ar_hdr.ar_date[i] = ' ';
|
||
sprintf (ar_hdr.ar_date, "%ld", (long int) statbuf.st_mtime);
|
||
#ifdef AIAMAG
|
||
ar_hdr.ar_date[strlen(ar_hdr.ar_date)] = ' ';
|
||
#endif
|
||
#else
|
||
ar_hdr.ar_date = statbuf.st_mtime;
|
||
#endif
|
||
/* Write back this member's header */
|
||
if (lseek (fd, pos, 0) < 0)
|
||
goto lose;
|
||
if (AR_HDR_SIZE != write (fd, (char *) &ar_hdr, AR_HDR_SIZE))
|
||
goto lose;
|
||
close (fd);
|
||
return 0;
|
||
|
||
lose:
|
||
i = errno;
|
||
close (fd);
|
||
errno = i;
|
||
return -3;
|
||
}
|
||
|
||
#ifdef TEST
|
||
|
||
long int
|
||
describe_member (desc, name, hdrpos, datapos, size, date, uid, gid, mode)
|
||
int desc;
|
||
char *name;
|
||
long int hdrpos, datapos, size, date;
|
||
int uid, gid, mode;
|
||
{
|
||
extern char *ctime ();
|
||
|
||
printf ("Member %s: %ld bytes at %ld (%ld).\n", name, size, hdrpos, datapos);
|
||
printf (" Date %s", ctime (&date));
|
||
printf (" uid = %d, gid = %d, mode = 0%o.\n", uid, gid, mode);
|
||
|
||
return 0;
|
||
}
|
||
|
||
main (argc, argv)
|
||
int argc;
|
||
char **argv;
|
||
{
|
||
ar_scan (argv[1], describe_member);
|
||
return 0;
|
||
}
|
||
|
||
#endif /* TEST. */
|
||
|
||
#endif /* NO_ARCHIVES. */
|