/* Library function for scanning an archive file. Copyright (C) 1987,89,91,92,93,94,95,97 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" #ifdef HAVE_FCNTL_H #include #else #include #endif #ifndef NO_ARCHIVES #ifdef VMS #include #include #include #include #include #if __DECC #include #include #endif #define uppercasify(str) {char *str1; for (str1 = str; *str1; str1++) *str1 = _toupper(*str1);} static void *VMS_lib_idx; static char *VMS_saved_memname; static time_t VMS_member_date; static long int (*VMS_function) (); static int VMS_get_member_info (module, rfa) struct dsc$descriptor_s *module; unsigned long *rfa; { int status, i; long int fnval; time_t val; static struct dsc$descriptor_s bufdesc = { 0, DSC$K_DTYPE_T, DSC$K_CLASS_S, NULL }; struct mhddef *mhd; char filename[128]; bufdesc.dsc$a_pointer = filename; bufdesc.dsc$w_length = sizeof (filename); status = lbr$set_module (&VMS_lib_idx, rfa, &bufdesc, &bufdesc.dsc$w_length, 0); if (! status) { error ("lbr$set_module failed to extract module info, status = %d", status); lbr$close (&VMS_lib_idx); return 0; } mhd = (struct mhddef *) filename; val = decc$fix_time (&mhd->mhd$l_datim); for (i = 0; i < module->dsc$w_length; i++) filename[i] = _tolower (module->dsc$a_pointer[i]); filename[i] = '\0'; VMS_member_date = (time_t) -1; fnval = (*VMS_function) (-1, filename, 0, 0, 0, 0, val, 0, 0, 0, VMS_saved_memname); if (fnval) { VMS_member_date = fnval; return 0; } else return 1; } /* 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 name might be truncated flag, member header position in file, member data position in file, member data size, member date, member uid, member gid, member protection mode, ARG. NOTE: on VMS systems, only name, date, and arg are meaningful! 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; { char *p; static struct dsc$descriptor_s libdesc = { 0, DSC$K_DTYPE_T, DSC$K_CLASS_S, NULL }; unsigned long func = LBR$C_READ; unsigned long type = LBR$C_TYP_UNK; unsigned long index = 1; int status; status = lbr$ini_control (&VMS_lib_idx, &func, &type, 0); if (! status) { error ("lbr$ini_control failed with status = %d",status); return -2; } libdesc.dsc$a_pointer = archive; libdesc.dsc$w_length = strlen (archive); status = lbr$open (&VMS_lib_idx, &libdesc, 0, 0, 0, 0, 0); if (! status) { error ("unable to open library `%s' to lookup member `%s'", archive, (char *)arg); return -1; } VMS_saved_memname = (char *)arg; /* For comparison, delete .obj from arg name. */ p = rindex (VMS_saved_memname, '.'); if (p) *p = '\0'; VMS_function = function; lbr$get_index (&VMS_lib_idx, &index, VMS_get_member_info, 0); /* Undo the damage. */ if (p) *p = '.'; lbr$close (&VMS_lib_idx); return VMS_member_date > 0 ? VMS_member_date : 0; } #else /* !VMS */ /* SCO Unix's compiler defines both of these. */ #ifdef M_UNIX #undef M_XENIX #endif /* 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 (PORTAR) || PORTAR == 0) && (!defined (PORT5AR) || PORT5AR == 0) #undef PORTAR #ifdef M_XENIX /* According to Jim Sievert , for SCO XENIX defining PORTAR to 1 gets the wrong archive format, and defining it to 0 gets the right one. */ #define PORTAR 0 #else #define PORTAR 1 #endif #endif #include /* Cray's 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 name might be truncated flag, 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; #else int long_name = 0; #endif char *namemap = 0; 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, (char *) &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); if (member_offset == 0) { /* Empty archive. */ close (desc); return 0; } #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[256]; int name_len; long int dateval; int uidval, gidval; long int data_offset; #else char namebuf[sizeof member_header.ar_name + 1]; char *name; int is_namemap; /* Nonzero if this entry maps long names. */ #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, 0, member_offset, data_offset, eltsize, dateval, uidval, gidval, eltmode, arg); #else /* Not AIAMAG. */ 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; } name = namebuf; bcopy (member_header.ar_name, name, sizeof member_header.ar_name); { register char *p = name + sizeof member_header.ar_name; do *p = '\0'; while (p > name && *--p == ' '); #ifndef AIAMAG /* If the member name is "//" or "ARFILENAMES/" this may be a list of file name mappings. The maximum file name length supported by the standard archive format is 14 characters. This member will actually always be the first or second entry in the archive, but we don't check that. */ is_namemap = (!strcmp (name, "//") || !strcmp (name, "ARFILENAMES/")); #endif /* Not AIAMAG. */ /* On some systems, there is a slash after each member name. */ if (*p == '/') *p = '\0'; #ifndef AIAMAG /* If the member name starts with a space or a slash, this is an index into the file name mappings (used by GNU ar). Otherwise if the member name looks like #1/NUMBER the real member name appears in the element data (used by 4.4BSD). */ if (! is_namemap && (name[0] == ' ' || name[0] == '/') && namemap != 0) { name = namemap + atoi (name + 1); long_name = 1; } else if (name[0] == '#' && name[1] == '1' && name[2] == '/') { int namesize = atoi (name + 3); name = (char *) alloca (namesize + 1); nread = read (desc, name, namesize); if (nread != namesize) { close (desc); return -2; } name[namesize] = '\0'; long_name = 1; } #endif /* Not AIAMAG. */ } #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, ! long_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 /* AIAMAG. */ if (fnval) { (void) close (desc); return fnval; } #ifdef AIAMAG if (member_offset == last_member_offset) /* End of the chain. */ break; sscanf (member_header.ar_nxtmem, "%12ld", &member_offset); if (lseek (desc, member_offset, 0) != member_offset) { (void) close (desc); return -2; } #else /* If this member maps archive names, we must read it in. The name map will always precede any members whose names must be mapped. */ if (is_namemap) { char *clear; char *limit; namemap = (char *) alloca (eltsize); nread = read (desc, namemap, eltsize); if (nread != eltsize) { (void) close (desc); return -2; } /* The names are separated by newlines. Some formats have a trailing slash. Null terminate the strings for convenience. */ limit = namemap + eltsize; for (clear = namemap; clear < limit; clear++) { if (*clear == '\n') { *clear = '\0'; if (clear[-1] == '/') clear[-1] = '\0'; } } is_namemap = 0; } member_offset += AR_HDR_SIZE + eltsize; if (member_offset % 2 != 0) member_offset++; #endif } } close (desc); return 0; } #endif /* !VMS */ /* Return nonzero iff NAME matches MEM. If TRUNCATED is nonzero, MEM may be truncated to sizeof (struct ar_hdr.ar_name) - 1. */ int ar_name_equal (name, mem, truncated) char *name, *mem; int truncated; { char *p; p = rindex (name, '/'); if (p != 0) name = p + 1; /* We no longer use this kludge, since we now support long archive member names. */ #if 0 && !defined (AIAMAG) && !defined (APOLLO) { /* `reallylongname.o' matches `reallylongnam.o'. If member names have a trailing slash, that's `reallylongna.o'. */ struct ar_hdr h; unsigned int max = sizeof (h.ar_name); unsigned int namelen, memlen; if (strncmp (name, mem, max - 3)) return 0; namelen = strlen (name); memlen = strlen (mem); if (namelen > memlen && memlen >= max - 1 && name[namelen - 2] == '.' && name[namelen - 1] == 'o' && mem[memlen - 2] == '.' && mem[memlen - 1] == 'o') return 1; if (namelen != memlen) return 0; return (namelen < max - 3 || !strcmp (name + max - 3, mem + max - 3)); } #else /* AIX or APOLLO. */ #ifndef VMS if (truncated) { #ifdef AIAMAG /* TRUNCATED should never be set on this system. */ abort (); #else struct ar_hdr hdr; return !strncmp (name, mem, sizeof (hdr.ar_name) - #if !defined (__hpux) && !defined (cray) 1 #else 2 #endif /* !__hpux && !cray */ ); #endif } #endif /* !VMS */ return !strcmp (name, mem); #endif } #ifndef VMS /* ARGSUSED */ static long int ar_member_pos (desc, mem, truncated, hdrpos, datapos, size, date, uid, gid, mode, name) int desc; char *mem; int truncated; long int hdrpos, datapos, size, date; int uid, gid, mode; char *name; { if (!ar_name_equal (name, mem, truncated)) 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; 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. */ #ifdef EINTR while (fstat (fd, &statbuf) < 0 && errno == EINTR); #else fstat (fd, &statbuf); #endif #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; } #endif #ifdef TEST long int describe_member (desc, name, truncated, hdrpos, datapos, size, date, uid, gid, mode) int desc; char *name; int truncated; long int hdrpos, datapos, size, date; int uid, gid, mode; { extern char *ctime (); printf ("Member `%s'%s: %ld bytes at %ld (%ld).\n", name, truncated ? " (name might be truncated)" : "", 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. */