forked from schacon/perl
/
vms.c
14209 lines (12669 loc) · 412 KB
/
vms.c
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/* vms.c
*
* VMS-specific routines for perl5
*
* Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
* 2002, 2003, 2004, 2005, 2006, 2007 by Charles Bailey and others.
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
* Please see Changes*.* or the Perl Repository Browser for revision history.
*/
/*
* Yet small as was their hunted band
* still fell and fearless was each hand,
* and strong deeds they wrought yet oft,
* and loved the woods, whose ways more soft
* them seemed than thralls of that black throne
* to live and languish in halls of stone.
* "The Lay of Leithian", Canto II, lines 135-40
*
* [p.162 of _The Lays of Beleriand_]
*/
#include <acedef.h>
#include <acldef.h>
#include <armdef.h>
#if __CRTL_VER < 70300000
/* needed for home-rolled utime() */
#include <atrdef.h>
#include <fibdef.h>
#endif
#include <chpdef.h>
#include <clidef.h>
#include <climsgdef.h>
#include <dcdef.h>
#include <descrip.h>
#include <devdef.h>
#include <dvidef.h>
#include <float.h>
#include <fscndef.h>
#include <iodef.h>
#include <jpidef.h>
#include <kgbdef.h>
#include <libclidef.h>
#include <libdef.h>
#include <lib$routines.h>
#include <lnmdef.h>
#include <ossdef.h>
#if __CRTL_VER >= 70301000 && !defined(__VAX)
#include <ppropdef.h>
#endif
#include <prvdef.h>
#include <psldef.h>
#include <rms.h>
#include <shrdef.h>
#include <ssdef.h>
#include <starlet.h>
#include <strdef.h>
#include <str$routines.h>
#include <syidef.h>
#include <uaidef.h>
#include <uicdef.h>
#include <stsdef.h>
#include <efndef.h>
#define NO_EFN EFN$C_ENF
#if __CRTL_VER < 70301000 && __CRTL_VER >= 70300000
int decc$feature_get_index(const char *name);
char* decc$feature_get_name(int index);
int decc$feature_get_value(int index, int mode);
int decc$feature_set_value(int index, int mode, int value);
#else
#include <unixlib.h>
#endif
#pragma member_alignment save
#pragma nomember_alignment longword
struct item_list_3 {
unsigned short len;
unsigned short code;
void * bufadr;
unsigned short * retadr;
};
#pragma member_alignment restore
#if __CRTL_VER >= 70300000 && !defined(__VAX)
static int set_feature_default(const char *name, int value)
{
int status;
int index;
index = decc$feature_get_index(name);
status = decc$feature_set_value(index, 1, value);
if (index == -1 || (status == -1)) {
return -1;
}
status = decc$feature_get_value(index, 1);
if (status != value) {
return -1;
}
return 0;
}
#endif
/* Older versions of ssdef.h don't have these */
#ifndef SS$_INVFILFOROP
# define SS$_INVFILFOROP 3930
#endif
#ifndef SS$_NOSUCHOBJECT
# define SS$_NOSUCHOBJECT 2696
#endif
/* We implement I/O here, so we will be mixing PerlIO and stdio calls. */
#define PERLIO_NOT_STDIO 0
/* Don't replace system definitions of vfork, getenv, lstat, and stat,
* code below needs to get to the underlying CRTL routines. */
#define DONT_MASK_RTL_CALLS
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
/* Anticipating future expansion in lexical warnings . . . */
#ifndef WARN_INTERNAL
# define WARN_INTERNAL WARN_MISC
#endif
#ifdef VMS_LONGNAME_SUPPORT
#include <libfildef.h>
#endif
#if !defined(__VAX) && __CRTL_VER >= 80200000
#ifdef lstat
#undef lstat
#endif
#else
#ifdef lstat
#undef lstat
#endif
#define lstat(_x, _y) stat(_x, _y)
#endif
/* Routine to create a decterm for use with the Perl debugger */
/* No headers, this information was found in the Programming Concepts Manual */
static int (*decw_term_port)
(const struct dsc$descriptor_s * display,
const struct dsc$descriptor_s * setup_file,
const struct dsc$descriptor_s * customization,
struct dsc$descriptor_s * result_device_name,
unsigned short * result_device_name_length,
void * controller,
void * char_buffer,
void * char_change_buffer) = 0;
/* gcc's header files don't #define direct access macros
* corresponding to VAXC's variant structs */
#ifdef __GNUC__
# define uic$v_format uic$r_uic_form.uic$v_format
# define uic$v_group uic$r_uic_form.uic$v_group
# define uic$v_member uic$r_uic_form.uic$v_member
# define prv$v_bypass prv$r_prvdef_bits0.prv$v_bypass
# define prv$v_grpprv prv$r_prvdef_bits0.prv$v_grpprv
# define prv$v_readall prv$r_prvdef_bits0.prv$v_readall
# define prv$v_sysprv prv$r_prvdef_bits0.prv$v_sysprv
#endif
#if defined(NEED_AN_H_ERRNO)
dEXT int h_errno;
#endif
#if defined(__DECC) || defined(__DECCXX)
#pragma member_alignment save
#pragma nomember_alignment longword
#pragma message save
#pragma message disable misalgndmem
#endif
struct itmlst_3 {
unsigned short int buflen;
unsigned short int itmcode;
void *bufadr;
unsigned short int *retlen;
};
struct filescan_itmlst_2 {
unsigned short length;
unsigned short itmcode;
char * component;
};
struct vs_str_st {
unsigned short length;
char str[VMS_MAXRSS];
unsigned short pad; /* for longword struct alignment */
};
#if defined(__DECC) || defined(__DECCXX)
#pragma message restore
#pragma member_alignment restore
#endif
#define do_fileify_dirspec(a,b,c,d) mp_do_fileify_dirspec(aTHX_ a,b,c,d)
#define do_pathify_dirspec(a,b,c,d) mp_do_pathify_dirspec(aTHX_ a,b,c,d)
#define do_tovmsspec(a,b,c,d) mp_do_tovmsspec(aTHX_ a,b,c,0,d)
#define do_tovmspath(a,b,c,d) mp_do_tovmspath(aTHX_ a,b,c,d)
#define do_rmsexpand(a,b,c,d,e,f,g) mp_do_rmsexpand(aTHX_ a,b,c,d,e,f,g)
#define do_vms_realpath(a,b,c) mp_do_vms_realpath(aTHX_ a,b,c)
#define do_vms_realname(a,b,c) mp_do_vms_realname(aTHX_ a,b,c)
#define do_tounixspec(a,b,c,d) mp_do_tounixspec(aTHX_ a,b,c,d)
#define do_tounixpath(a,b,c,d) mp_do_tounixpath(aTHX_ a,b,c,d)
#define do_vms_case_tolerant(a) mp_do_vms_case_tolerant(a)
#define expand_wild_cards(a,b,c,d) mp_expand_wild_cards(aTHX_ a,b,c,d)
#define getredirection(a,b) mp_getredirection(aTHX_ a,b)
static char *mp_do_tovmspath(pTHX_ const char *path, char *buf, int ts, int *);
static char *mp_do_tounixpath(pTHX_ const char *path, char *buf, int ts, int *);
static char *mp_do_tounixspec(pTHX_ const char *, char *, int, int *);
static char *mp_do_pathify_dirspec(pTHX_ const char *dir,char *buf, int ts, int *);
static char * int_rmsexpand_vms(
const char * filespec, char * outbuf, unsigned opts);
static char * int_rmsexpand_tovms(
const char * filespec, char * outbuf, unsigned opts);
static char *int_tovmsspec
(const char *path, char *buf, int dir_flag, int * utf8_flag);
static char * int_fileify_dirspec(const char *dir, char *buf, int *utf8_fl);
static char * int_tounixspec(const char *spec, char *buf, int * utf8_fl);
static char * int_tovmspath(const char *path, char *buf, int * utf8_fl);
/* see system service docs for $TRNLNM -- NOT the same as LNM$_MAX_INDEX */
#define PERL_LNM_MAX_ALLOWED_INDEX 127
/* OpenVMS User's Guide says at least 9 iterative translations will be performed,
* depending on the facility. SHOW LOGICAL does 10, so we'll imitate that for
* the Perl facility.
*/
#define PERL_LNM_MAX_ITER 10
/* New values with 7.3-2*/ /* why does max DCL have 4 byte subtracted from it? */
#if __CRTL_VER >= 70302000 && !defined(__VAX)
#define MAX_DCL_SYMBOL (8192)
#define MAX_DCL_LINE_LENGTH (4096 - 4)
#else
#define MAX_DCL_SYMBOL (1024)
#define MAX_DCL_LINE_LENGTH (1024 - 4)
#endif
static char *__mystrtolower(char *str)
{
if (str) for (; *str; ++str) *str= tolower(*str);
return str;
}
static struct dsc$descriptor_s fildevdsc =
{ 12, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$FILE_DEV" };
static struct dsc$descriptor_s crtlenvdsc =
{ 8, DSC$K_DTYPE_T, DSC$K_CLASS_S, "CRTL_ENV" };
static struct dsc$descriptor_s *fildev[] = { &fildevdsc, NULL };
static struct dsc$descriptor_s *defenv[] = { &fildevdsc, &crtlenvdsc, NULL };
static struct dsc$descriptor_s **env_tables = defenv;
static bool will_taint = FALSE; /* tainting active, but no PL_curinterp yet */
/* True if we shouldn't treat barewords as logicals during directory */
/* munching */
static int no_translate_barewords;
/* DECC Features that may need to affect how Perl interprets
* displays filename information
*/
static int decc_disable_to_vms_logname_translation = 1;
static int decc_disable_posix_root = 1;
int decc_efs_case_preserve = 0;
static int decc_efs_charset = 0;
static int decc_efs_charset_index = -1;
static int decc_filename_unix_no_version = 0;
static int decc_filename_unix_only = 0;
int decc_filename_unix_report = 0;
int decc_posix_compliant_pathnames = 0;
int decc_readdir_dropdotnotype = 0;
static int vms_process_case_tolerant = 1;
int vms_vtf7_filenames = 0;
int gnv_unix_shell = 0;
static int vms_unlink_all_versions = 0;
static int vms_posix_exit = 0;
/* bug workarounds if needed */
int decc_bug_devnull = 1;
int decc_dir_barename = 0;
int vms_bug_stat_filename = 0;
static int vms_debug_on_exception = 0;
static int vms_debug_fileify = 0;
/* Simple logical name translation */
static int simple_trnlnm
(const char * logname,
char * value,
int value_len)
{
const $DESCRIPTOR(table_dsc, "LNM$FILE_DEV");
const unsigned long attr = LNM$M_CASE_BLIND;
struct dsc$descriptor_s name_dsc;
int status;
unsigned short result;
struct itmlst_3 itlst[2] = {{value_len, LNM$_STRING, value, &result},
{0, 0, 0, 0}};
name_dsc.dsc$w_length = strlen(logname);
name_dsc.dsc$a_pointer = (char *)logname;
name_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
name_dsc.dsc$b_class = DSC$K_CLASS_S;
status = sys$trnlnm(&attr, &table_dsc, &name_dsc, 0, itlst);
if ($VMS_STATUS_SUCCESS(status)) {
/* Null terminate and return the string */
/*--------------------------------------*/
value[result] = 0;
return result;
}
return 0;
}
/* Is this a UNIX file specification?
* No longer a simple check with EFS file specs
* For now, not a full check, but need to
* handle POSIX ^UP^ specifications
* Fixing to handle ^/ cases would require
* changes to many other conversion routines.
*/
static int is_unix_filespec(const char *path)
{
int ret_val;
const char * pch1;
ret_val = 0;
if (strncmp(path,"\"^UP^",5) != 0) {
pch1 = strchr(path, '/');
if (pch1 != NULL)
ret_val = 1;
else {
/* If the user wants UNIX files, "." needs to be treated as in UNIX */
if (decc_filename_unix_report || decc_filename_unix_only) {
if (strcmp(path,".") == 0)
ret_val = 1;
}
}
}
return ret_val;
}
/* This routine converts a UCS-2 character to be VTF-7 encoded.
*/
static void ucs2_to_vtf7
(char *outspec,
unsigned long ucs2_char,
int * output_cnt)
{
unsigned char * ucs_ptr;
int hex;
ucs_ptr = (unsigned char *)&ucs2_char;
outspec[0] = '^';
outspec[1] = 'U';
hex = (ucs_ptr[1] >> 4) & 0xf;
if (hex < 0xA)
outspec[2] = hex + '0';
else
outspec[2] = (hex - 9) + 'A';
hex = ucs_ptr[1] & 0xF;
if (hex < 0xA)
outspec[3] = hex + '0';
else {
outspec[3] = (hex - 9) + 'A';
}
hex = (ucs_ptr[0] >> 4) & 0xf;
if (hex < 0xA)
outspec[4] = hex + '0';
else
outspec[4] = (hex - 9) + 'A';
hex = ucs_ptr[1] & 0xF;
if (hex < 0xA)
outspec[5] = hex + '0';
else {
outspec[5] = (hex - 9) + 'A';
}
*output_cnt = 6;
}
/* This handles the conversion of a UNIX extended character set to a ^
* escaped VMS character.
* in a UNIX file specification.
*
* The output count variable contains the number of characters added
* to the output string.
*
* The return value is the number of characters read from the input string
*/
static int copy_expand_unix_filename_escape
(char *outspec, const char *inspec, int *output_cnt, const int * utf8_fl)
{
int count;
int utf8_flag;
utf8_flag = 0;
if (utf8_fl)
utf8_flag = *utf8_fl;
count = 0;
*output_cnt = 0;
if (*inspec >= 0x80) {
if (utf8_fl && vms_vtf7_filenames) {
unsigned long ucs_char;
ucs_char = 0;
if ((*inspec & 0xE0) == 0xC0) {
/* 2 byte Unicode */
ucs_char = ((inspec[0] & 0x1F) << 6) + (inspec[1] & 0x3f);
if (ucs_char >= 0x80) {
ucs2_to_vtf7(outspec, ucs_char, output_cnt);
return 2;
}
} else if ((*inspec & 0xF0) == 0xE0) {
/* 3 byte Unicode */
ucs_char = ((inspec[0] & 0xF) << 12) +
((inspec[1] & 0x3f) << 6) +
(inspec[2] & 0x3f);
if (ucs_char >= 0x800) {
ucs2_to_vtf7(outspec, ucs_char, output_cnt);
return 3;
}
#if 0 /* I do not see longer sequences supported by OpenVMS */
/* Maybe some one can fix this later */
} else if ((*inspec & 0xF8) == 0xF0) {
/* 4 byte Unicode */
/* UCS-4 to UCS-2 */
} else if ((*inspec & 0xFC) == 0xF8) {
/* 5 byte Unicode */
/* UCS-4 to UCS-2 */
} else if ((*inspec & 0xFE) == 0xFC) {
/* 6 byte Unicode */
/* UCS-4 to UCS-2 */
#endif
}
}
/* High bit set, but not a Unicode character! */
/* Non printing DECMCS or ISO Latin-1 character? */
if ((unsigned char)*inspec <= 0x9F) {
int hex;
outspec[0] = '^';
outspec++;
hex = (*inspec >> 4) & 0xF;
if (hex < 0xA)
outspec[1] = hex + '0';
else {
outspec[1] = (hex - 9) + 'A';
}
hex = *inspec & 0xF;
if (hex < 0xA)
outspec[2] = hex + '0';
else {
outspec[2] = (hex - 9) + 'A';
}
*output_cnt = 3;
return 1;
} else if ((unsigned char)*inspec == 0xA0) {
outspec[0] = '^';
outspec[1] = 'A';
outspec[2] = '0';
*output_cnt = 3;
return 1;
} else if ((unsigned char)*inspec == 0xFF) {
outspec[0] = '^';
outspec[1] = 'F';
outspec[2] = 'F';
*output_cnt = 3;
return 1;
}
*outspec = *inspec;
*output_cnt = 1;
return 1;
}
/* Is this a macro that needs to be passed through?
* Macros start with $( and an alpha character, followed
* by a string of alpha numeric characters ending with a )
* If this does not match, then encode it as ODS-5.
*/
if ((inspec[0] == '$') && (inspec[1] == '(')) {
int tcnt;
if (isalnum(inspec[2]) || (inspec[2] == '.') || (inspec[2] == '_')) {
tcnt = 3;
outspec[0] = inspec[0];
outspec[1] = inspec[1];
outspec[2] = inspec[2];
while(isalnum(inspec[tcnt]) ||
(inspec[2] == '.') || (inspec[2] == '_')) {
outspec[tcnt] = inspec[tcnt];
tcnt++;
}
if (inspec[tcnt] == ')') {
outspec[tcnt] = inspec[tcnt];
tcnt++;
*output_cnt = tcnt;
return tcnt;
}
}
}
switch (*inspec) {
case 0x7f:
outspec[0] = '^';
outspec[1] = '7';
outspec[2] = 'F';
*output_cnt = 3;
return 1;
break;
case '?':
if (decc_efs_charset == 0)
outspec[0] = '%';
else
outspec[0] = '?';
*output_cnt = 1;
return 1;
break;
case '.':
case '~':
case '!':
case '#':
case '&':
case '\'':
case '`':
case '(':
case ')':
case '+':
case '@':
case '{':
case '}':
case ',':
case ';':
case '[':
case ']':
case '%':
case '^':
case '\\':
/* Don't escape again if following character is
* already something we escape.
*/
if (strchr(".~!#&\'`()+@{},;[]%^=_\\", *(inspec+1))) {
*outspec = *inspec;
*output_cnt = 1;
return 1;
break;
}
/* But otherwise fall through and escape it. */
case '=':
/* Assume that this is to be escaped */
outspec[0] = '^';
outspec[1] = *inspec;
*output_cnt = 2;
return 1;
break;
case ' ': /* space */
/* Assume that this is to be escaped */
outspec[0] = '^';
outspec[1] = '_';
*output_cnt = 2;
return 1;
break;
default:
*outspec = *inspec;
*output_cnt = 1;
return 1;
break;
}
return 0;
}
/* This handles the expansion of a '^' prefix to the proper character
* in a UNIX file specification.
*
* The output count variable contains the number of characters added
* to the output string.
*
* The return value is the number of characters read from the input
* string
*/
static int copy_expand_vms_filename_escape
(char *outspec, const char *inspec, int *output_cnt)
{
int count;
int scnt;
count = 0;
*output_cnt = 0;
if (*inspec == '^') {
inspec++;
switch (*inspec) {
/* Spaces and non-trailing dots should just be passed through,
* but eat the escape character.
*/
case '.':
*outspec = *inspec;
count += 2;
(*output_cnt)++;
break;
case '_': /* space */
*outspec = ' ';
count += 2;
(*output_cnt)++;
break;
case '^':
/* Hmm. Better leave the escape escaped. */
outspec[0] = '^';
outspec[1] = '^';
count += 2;
(*output_cnt) += 2;
break;
case 'U': /* Unicode - FIX-ME this is wrong. */
inspec++;
count++;
scnt = strspn(inspec, "0123456789ABCDEFabcdef");
if (scnt == 4) {
unsigned int c1, c2;
scnt = sscanf(inspec, "%2x%2x", &c1, &c2);
outspec[0] = c1 & 0xff;
outspec[1] = c2 & 0xff;
if (scnt > 1) {
(*output_cnt) += 2;
count += 4;
}
}
else {
/* Error - do best we can to continue */
*outspec = 'U';
outspec++;
(*output_cnt++);
*outspec = *inspec;
count++;
(*output_cnt++);
}
break;
default:
scnt = strspn(inspec, "0123456789ABCDEFabcdef");
if (scnt == 2) {
/* Hex encoded */
unsigned int c1;
scnt = sscanf(inspec, "%2x", &c1);
outspec[0] = c1 & 0xff;
if (scnt > 0) {
(*output_cnt++);
count += 2;
}
}
else {
*outspec = *inspec;
count++;
(*output_cnt++);
}
}
}
else {
*outspec = *inspec;
count++;
(*output_cnt)++;
}
return count;
}
/* vms_split_path - Verify that the input file specification is a
* VMS format file specification, and provide pointers to the components of
* it. With EFS format filenames, this is virtually the only way to
* parse a VMS path specification into components.
*
* If the sum of the components do not add up to the length of the
* string, then the passed file specification is probably a UNIX style
* path.
*/
static int vms_split_path
(const char * path,
char * * volume,
int * vol_len,
char * * root,
int * root_len,
char * * dir,
int * dir_len,
char * * name,
int * name_len,
char * * ext,
int * ext_len,
char * * version,
int * ver_len)
{
struct dsc$descriptor path_desc;
int status;
unsigned long flags;
int ret_stat;
struct filescan_itmlst_2 item_list[9];
const int filespec = 0;
const int nodespec = 1;
const int devspec = 2;
const int rootspec = 3;
const int dirspec = 4;
const int namespec = 5;
const int typespec = 6;
const int verspec = 7;
/* Assume the worst for an easy exit */
ret_stat = -1;
*volume = NULL;
*vol_len = 0;
*root = NULL;
*root_len = 0;
*dir = NULL;
*name = NULL;
*name_len = 0;
*ext = NULL;
*ext_len = 0;
*version = NULL;
*ver_len = 0;
path_desc.dsc$a_pointer = (char *)path; /* cast ok */
path_desc.dsc$w_length = strlen(path);
path_desc.dsc$b_dtype = DSC$K_DTYPE_T;
path_desc.dsc$b_class = DSC$K_CLASS_S;
/* Get the total length, if it is shorter than the string passed
* then this was probably not a VMS formatted file specification
*/
item_list[filespec].itmcode = FSCN$_FILESPEC;
item_list[filespec].length = 0;
item_list[filespec].component = NULL;
/* If the node is present, then it gets considered as part of the
* volume name to hopefully make things simple.
*/
item_list[nodespec].itmcode = FSCN$_NODE;
item_list[nodespec].length = 0;
item_list[nodespec].component = NULL;
item_list[devspec].itmcode = FSCN$_DEVICE;
item_list[devspec].length = 0;
item_list[devspec].component = NULL;
/* root is a special case, adding it to either the directory or
* the device components will probably complicate things for the
* callers of this routine, so leave it separate.
*/
item_list[rootspec].itmcode = FSCN$_ROOT;
item_list[rootspec].length = 0;
item_list[rootspec].component = NULL;
item_list[dirspec].itmcode = FSCN$_DIRECTORY;
item_list[dirspec].length = 0;
item_list[dirspec].component = NULL;
item_list[namespec].itmcode = FSCN$_NAME;
item_list[namespec].length = 0;
item_list[namespec].component = NULL;
item_list[typespec].itmcode = FSCN$_TYPE;
item_list[typespec].length = 0;
item_list[typespec].component = NULL;
item_list[verspec].itmcode = FSCN$_VERSION;
item_list[verspec].length = 0;
item_list[verspec].component = NULL;
item_list[8].itmcode = 0;
item_list[8].length = 0;
item_list[8].component = NULL;
status = sys$filescan
((const struct dsc$descriptor_s *)&path_desc, item_list,
&flags, NULL, NULL);
_ckvmssts_noperl(status); /* All failure status values indicate a coding error */
/* If we parsed it successfully these two lengths should be the same */
if (path_desc.dsc$w_length != item_list[filespec].length)
return ret_stat;
/* If we got here, then it is a VMS file specification */
ret_stat = 0;
/* set the volume name */
if (item_list[nodespec].length > 0) {
*volume = item_list[nodespec].component;
*vol_len = item_list[nodespec].length + item_list[devspec].length;
}
else {
*volume = item_list[devspec].component;
*vol_len = item_list[devspec].length;
}
*root = item_list[rootspec].component;
*root_len = item_list[rootspec].length;
*dir = item_list[dirspec].component;
*dir_len = item_list[dirspec].length;
/* Now fun with versions and EFS file specifications
* The parser can not tell the difference when a "." is a version
* delimiter or a part of the file specification.
*/
if ((decc_efs_charset) &&
(item_list[verspec].length > 0) &&
(item_list[verspec].component[0] == '.')) {
*name = item_list[namespec].component;
*name_len = item_list[namespec].length + item_list[typespec].length;
*ext = item_list[verspec].component;
*ext_len = item_list[verspec].length;
*version = NULL;
*ver_len = 0;
}
else {
*name = item_list[namespec].component;
*name_len = item_list[namespec].length;
*ext = item_list[typespec].component;
*ext_len = item_list[typespec].length;
*version = item_list[verspec].component;
*ver_len = item_list[verspec].length;
}
return ret_stat;
}
/* Routine to determine if the file specification ends with .dir */
static int is_dir_ext(char * e_spec, int e_len, char * vs_spec, int vs_len) {
/* e_len must be 4, and version must be <= 2 characters */
if (e_len != 4 || vs_len > 2)
return 0;
/* If a version number is present, it needs to be one */
if ((vs_len == 2) && (vs_spec[1] != '1'))
return 0;
/* Look for the DIR on the extension */
if (vms_process_case_tolerant) {
if ((toupper(e_spec[1]) == 'D') &&
(toupper(e_spec[2]) == 'I') &&
(toupper(e_spec[3]) == 'R')) {
return 1;
}
} else {
/* Directory extensions are supposed to be in upper case only */
/* I would not be surprised if this rule can not be enforced */
/* if and when someone fully debugs the case sensitive mode */
if ((e_spec[1] == 'D') &&
(e_spec[2] == 'I') &&
(e_spec[3] == 'R')) {
return 1;
}
}
return 0;
}
/* my_maxidx
* Routine to retrieve the maximum equivalence index for an input
* logical name. Some calls to this routine have no knowledge if
* the variable is a logical or not. So on error we return a max
* index of zero.
*/
/*{{{int my_maxidx(const char *lnm) */
static int
my_maxidx(const char *lnm)
{
int status;
int midx;
int attr = LNM$M_CASE_BLIND;
struct dsc$descriptor lnmdsc;
struct itmlst_3 itlst[2] = {{sizeof(midx), LNM$_MAX_INDEX, &midx, 0},
{0, 0, 0, 0}};
lnmdsc.dsc$w_length = strlen(lnm);
lnmdsc.dsc$b_dtype = DSC$K_DTYPE_T;
lnmdsc.dsc$b_class = DSC$K_CLASS_S;
lnmdsc.dsc$a_pointer = (char *) lnm; /* Cast ok for read only parameter */
status = sys$trnlnm(&attr, &fildevdsc, &lnmdsc, 0, itlst);
if ((status & 1) == 0)
midx = 0;
return (midx);
}
/*}}}*/
/*{{{int vmstrnenv(const char *lnm, char *eqv, unsigned long int idx, struct dsc$descriptor_s **tabvec, unsigned long int flags) */
int
Perl_vmstrnenv(const char *lnm, char *eqv, unsigned long int idx,
struct dsc$descriptor_s **tabvec, unsigned long int flags)
{
const char *cp1;
char uplnm[LNM$C_NAMLENGTH+1], *cp2;
unsigned short int eqvlen, curtab, ivlnm = 0, ivsym = 0, ivenv = 0, secure;
unsigned long int retsts, attr = LNM$M_CASE_BLIND;
int midx;
unsigned char acmode;
struct dsc$descriptor_s lnmdsc = {0,DSC$K_DTYPE_T,DSC$K_CLASS_S,0},
tmpdsc = {6,DSC$K_DTYPE_T,DSC$K_CLASS_S,0};
struct itmlst_3 lnmlst[3] = {{sizeof idx, LNM$_INDEX, &idx, 0},
{LNM$C_NAMLENGTH, LNM$_STRING, eqv, &eqvlen},
{0, 0, 0, 0}};
$DESCRIPTOR(crtlenv,"CRTL_ENV"); $DESCRIPTOR(clisym,"CLISYM");
#if defined(PERL_IMPLICIT_CONTEXT)
pTHX = NULL;
if (PL_curinterp) {
aTHX = PERL_GET_INTERP;
} else {
aTHX = NULL;
}
#endif
if (!lnm || !eqv || ((idx != 0) && ((idx-1) > PERL_LNM_MAX_ALLOWED_INDEX))) {
set_errno(EINVAL); set_vaxc_errno(SS$_BADPARAM); return 0;
}
for (cp1 = lnm, cp2 = uplnm; *cp1; cp1++, cp2++) {
*cp2 = _toupper(*cp1);
if (cp1 - lnm > LNM$C_NAMLENGTH) {
set_errno(EINVAL); set_vaxc_errno(SS$_IVLOGNAM);
return 0;
}
}
lnmdsc.dsc$w_length = cp1 - lnm;
lnmdsc.dsc$a_pointer = uplnm;
uplnm[lnmdsc.dsc$w_length] = '\0';
secure = flags & PERL__TRNENV_SECURE;
acmode = secure ? PSL$C_EXEC : PSL$C_USER;
if (!tabvec || !*tabvec) tabvec = env_tables;
for (curtab = 0; tabvec[curtab]; curtab++) {
if (!str$case_blind_compare(tabvec[curtab],&crtlenv)) {
if (!ivenv && !secure) {
char *eq;
int i;
if (!environ) {
ivenv = 1;
#if defined(PERL_IMPLICIT_CONTEXT)
if (aTHX == NULL) {
fprintf(stderr,
"Can't read CRTL environ\n");
} else
#endif
Perl_warn(aTHX_ "Can't read CRTL environ\n");
continue;
}
retsts = SS$_NOLOGNAM;
for (i = 0; environ[i]; i++) {
if ((eq = strchr(environ[i],'=')) &&
lnmdsc.dsc$w_length == (eq - environ[i]) &&
!strncmp(environ[i],uplnm,eq - environ[i])) {
eq++;
for (eqvlen = 0; eq[eqvlen]; eqvlen++) eqv[eqvlen] = eq[eqvlen];
if (!eqvlen) continue;
retsts = SS$_NORMAL;
break;
}
}
if (retsts != SS$_NOLOGNAM) break;
}
}
else if ((tmpdsc.dsc$a_pointer = tabvec[curtab]->dsc$a_pointer) &&
!str$case_blind_compare(&tmpdsc,&clisym)) {
if (!ivsym && !secure) {
unsigned short int deflen = LNM$C_NAMLENGTH;
struct dsc$descriptor_d eqvdsc = {0,DSC$K_DTYPE_T,DSC$K_CLASS_D,0};
/* dynamic dsc to accommodate possible long value */
_ckvmssts_noperl(lib$sget1_dd(&deflen,&eqvdsc));
retsts = lib$get_symbol(&lnmdsc,&eqvdsc,&eqvlen,0);
if (retsts & 1) {
if (eqvlen > MAX_DCL_SYMBOL) {
set_errno(EVMSERR); set_vaxc_errno(LIB$_STRTRU);
eqvlen = MAX_DCL_SYMBOL;
/* Special hack--we might be called before the interpreter's */
/* fully initialized, in which case either thr or PL_curcop */
/* might be bogus. We have to check, since ckWARN needs them */
/* both to be valid if running threaded */
#if defined(PERL_IMPLICIT_CONTEXT)
if (aTHX == NULL) {
fprintf(stderr,