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/* @(#)osh.c 19.1 (ES0-DMD) 02/25/03 13:56:12 */
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/*===========================================================================
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Copyright (C) 1995 European Southern Observatory (ESO)
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public
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License along with this program; if not, write to the Free
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Software Foundation, Inc., 675 Massachusetss Ave, Cambridge,
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Corresponding concerning ESO-MIDAS should be addressed as follows:
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Internet e-mail: midas@eso.org
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Postal address: European Southern Observatory
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Data Management Division
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Karl-Schwarzschild-Strasse 2
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D 85748 Garching bei Muenchen
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===========================================================================*/
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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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.AUTHOR IPG-ESO Garching
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.CATEGORY Host operating system interfaces. Host services.
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.ENVIRONMENT VAX/VMS Version
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Provide miscellaneous host services.
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The routines return time and date stamps,
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return cpu time used by the current process,
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translate logicals (environment)
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executes host commands.
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Time resolution is host dependent parameter.
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The routines return always
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a non-negative integer number on successful return.
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Otherwise, a value of -1 is set to indicate an error
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condition and the variable ``oserror'' contains the
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.VERSION 0.0 25-Aug-1986 Definition. J. D. Ponz
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.VERSION 1.8 10-Feb-1988 VMS Version. F. ochsenbein.
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Difference oshgmt / oshtime
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.VERSION 1.9 05-Sep-1989 Changed some `unclever' macros...
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.VERSION 2.0 08-Aug-1990 Added oshtm / oshtl (time conversions)
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------------------------------------------------------------*/
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MID_EXTERN int oserror;
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MID_EXTERN int vmserror;
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#include <time.h> /* System */
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#include <errno.h> /* System */
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#include <ssdef.h> /* System */
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#include <descrip.h> /* System */
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#include <lnmdef.h> /* System */
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#define TR_MAX LNM$C_NAMLENGTH /* Maximal length translation */
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#define len dsc$w_length
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#define s dsc$a_pointer
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typedef struct dsc$descriptor descript;
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#define void_string {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, NULL_PTR(char)}
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#define InitDescript(text) \
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{sizeof(text)-1, DSC$K_DTYPE_T, DSC$K_CLASS_S,text}
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#define SET_STRING(dsc,str) dsc.s = str, dsc.len = strlen(str) \
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/* Set address & length of a string */
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struct item { /* For TRNLNM system service */
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unsigned short int len;
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unsigned short int item_code;
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static long returned_len = 0;
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static char tr_buf[TR_MAX+1] = "";
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#define FINISH goto FIN
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#define RETURN(x) FIN: return (oserror ? -1 : x)
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/*==========================================================================
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* Logical Name Translations
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*==========================================================================*/
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/*==========================================================================*/
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int oshset(logname, translation)
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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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Inserts a logical name in the Environment.
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.RETURNS 0 (success) / -1 (failure)
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------------------------------------------------------------*/
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char *logname; /* IN : logical name */
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char *translation; /* IN : Equivalence String */
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static descript sdv_table = InitDescript("LNM$PROCESS_TABLE");
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static descript sdv_in = void_string;
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struct item Item; /* Equivalence string */
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{0, LNM$_STRING, 0, &returned_len},
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SET_STRING(sdv_in, logname);
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item_eq.Item.addr = translation, item_eq.Item.len = strlen(translation);
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vmserror = SYS$CRELNM(0,&sdv_table,&sdv_in,0,&item_eq);
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if ((vmserror&1) == 0) { oserror = ENXIO; FINISH;}
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return(oserror ? -1 : 0);
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/*==========================================================================*/
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char *oshenv(logname, table)
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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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Translate logical names into physical names., according to a table.
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.RETURNS Address of equivalence name / NULL when logname not found
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.REMARKS table is used only in VMS environment (default is LNM$FILE_DEV).
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Translation is not case-dependent on VMS. Use recursive translation.
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------------------------------------------------------------*/
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char *logname; /* IN : logical name */
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char *table; /* IN : name of the table to look for (VMS only) */
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static unsigned int lnmlength = 0;
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static unsigned int attr_case = LNM$M_CASE_BLIND;
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static unsigned int attr_list = 0;
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static descript sdv_table = void_string;
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static descript sdv_in = void_string;
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static descript sdv_out = InitDescript(tr_buf);
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struct item Item; /* Equivalence string */
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{TR_MAX, LNM$_STRING, tr_buf, &sdv_out},
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struct item Item; /* Attributes of logical */
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{sizeof(attr_list), LNM$_ATTRIBUTES, &attr_list, &lnmlength},
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SET_STRING(sdv_in, logname);
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p = (table ? table : "LNM$FILE_DEV");
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p = (*p ? p : "LNM$FILE_DEV"); /* In case of void string */
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SET_STRING(sdv_table, p); /* Write info as descriptors */
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vmserror = SYS$TRNLNM(&attr_case,&sdv_table,&sdv_in,0,&item_attr);
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if (vmserror != SS$_NORMAL) { oserror = ENXIO; FINISH;}
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/* Continue Translations while a translation exists */
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while (attr_list & (LNM$M_EXISTS))
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{ SYS$TRNLNM(&attr_case,&sdv_table,&sdv_in,0,&item_eq);
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tr_buf[sdv_out.len] = EOS; /* Append the EOS character */
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if (*p == 033) p += 4; /* Terminal translation */
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if (tr_buf[--(sdv_out.len)] != ':') (sdv_out.len)++;
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sdv_in.s = sdv_out.s; sdv_in.len = sdv_out.len;
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if (SYS$TRNLNM(&attr_case,&sdv_table,&sdv_in,0,&item_attr)
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!= SS$_NORMAL) FINISH;
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if (attr_list & (LNM$M_CONCEALED | LNM$M_TERMINAL)) FINISH;
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return(oserror ? NULL_PTR(char) : p);
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/*==========================================================================*/
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int oshtr(logname, phname, size)
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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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Translate logical names into physical names. i.e. $KEYS ==> myfile.key
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.RETURNS Value 0 on normal return, -1 when logname not found (phname then
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contains an empty string)
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.REMARKS Simply use oshenv.
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------------------------------------------------------------*/
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char *logname; /* IN : logical name */
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char *phname; /* OUT : logical physical name */
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int size; /* IN : size of phname */
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register char *p, *q;
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if (size < 2) { oserror = EINVAL; FINISH; } /* Output too small */
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p = oshenv(logname, NULL_PTR(char));
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if (!p) FINISH; /* No translation... */
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if (strlen(p) >= (size-1)) /* Translation is too long */
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{ oserror = ERANGE; FINISH;}
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for (q=phname; *p; p++, q++) *q = *p;
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return (oserror ? -1 : 0);
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/*==========================================================================
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* Date / Time Services
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*==========================================================================*/
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/*======================================================================*/
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static long vmstime(q)
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.PURPOSE Converts the VAX time to standard
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.RETURNS Time as seconds elapsed since Jan. 1, 1970
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.REMARKS The VAX time is 64 bits; origin = Nov. 17, 1858; units = 100ns.
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(40587 days before Jan 1, 1970)
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unsigned long *q; /* IN: VAX time */
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tt = q[1] * 4294967296e0;
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tt = tt / 1.e7 - (40587.e0 * 86400.e0);
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/*==========================================================================*/
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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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.PURPOSE Retrieves current (local!) time in seconds elapsed since Jan. 1, 1970, 0h.
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.RETURNS The time in seconds.
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------------------------------------------------------------*/
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static long qtime[2];
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return(vmstime(qtime));
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#define Jan1_1970 135140L /* Date in 400-yr cycle */
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#define Jan1_1980 138792L /* Date in 400-yr cycle */
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#define Jan1_2000 0L /* Date in 400-yr cycle */
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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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.PURPOSE Convert time structure into seconds since Jan. 1, 1970
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.RETURNS The time in seconds.
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.REMARKS Computation is done here, system call seems to be non-existent...
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------------------------------------------------------------*/
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struct tm *T; /* IN: Time structure to convert */
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register long int j, y, t;
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/* Compute Day of 400 yr cycle */
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if (y < 1000) y += 1900;
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y += 400; /* To be sure j is positive */
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j = y - (11 - T->tm_mon)/10;
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t = ((1461L*j)/4 + (306L * ((T->tm_mon+10)%12) + 5)/10
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- (3* ((j + 100L)/100L))/4 + T->tm_mday + 59L) % 146097L;
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/* Compute Week day */
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T->tm_wday = (t+6L)%7L;
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t -= Jan1_1970; /* Origin = Jan 1, 1970 */
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if (t < -24855) t += 146097L;
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if (t > 24855) t -= 146097L;
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/* Transform Day into seconds */
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if (t < -24855) t = -24855;
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if (t > 24855) t = 24855;
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t = t * 86400L + T->tm_hour * 3600L + T->tm_min * 60L + T->tm_sec;
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struct tm *oshtm(clock)
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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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.PURPOSE Convert time (long) as time structure
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.RETURNS Equivalent structure with filled items
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.REMARKS VMS localtime is completely wrong for dates < Jan 1, 1970 !!!
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------------------------------------------------------------*/
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long clock; /* IN: Time as seconds since Jan. 1, 1970 */
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static unsigned char month[12]={31,28,31,30,31,30,31,31,30,31,30,31};
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days += (t/86400L); t %= 86400L;
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T.tm_sec = t%60; t /= 60;
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/* Compute Week day */
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T.tm_wday = (days+Jan1_1970+6L)%7L;
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days += (70L*365L + 18L); /* Offset 1900 */
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T.tm_yday = days - 365L*y - (y+3)/4;
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/* Compute mon + mday from yday */
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month[1] = (y&3 ? 28 : 29);
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for (y=T.tm_yday, t=0; y>=month[t]; y -= month[t], t++) ;
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/*==========================================================================*/
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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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.PURPOSE Retrieves GMT time in seconds elapsed since Jan. 1, 1970, 0h.
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.RETURNS The time in seconds.
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------------------------------------------------------------*/
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static long qtime[2] ;
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p = oshenv("TIMEZONE", NULL_PTR(char));
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if (p) TU = atoi(p); /* Get GMT difference */
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return(vmstime(qtime) - TU*60);
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/*==========================================================================*/
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long oshcpu(op, ftime)
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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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.PURPOSE Gets CPU time. Precision is : hundreds of seconds.
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Cpu time returned is the sum of the time spend for both system
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tasks and process itself needed for the completion of the task.
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.RETURNS Elapsed CPU time in `clock-ticks' (1/100 s) for VMS
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-1 if the operation to do is unknown or if
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the get operation was not preceded by an initialization.
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.REMARKS On MS-DOS, cpu time is equated to elapsed time...
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------------------------------------------------------------*/
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int op; /* IN : operation to execute : INIT_CLOCK / GET_CLOCK */
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float *ftime; /* OUT: CPU time in seconds */
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static long firstime = 0;
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static int param = 2;
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if (ftime) *ftime = 0.e0;
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{ case INIT_CLOCK : /**** Initialize timer */
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vmserror = LIB$INIT_TIMER();
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if (!(vmserror&1)) oserror = EINTR;
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case GET_CLOCK : /**** get time */
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vmserror = LIB$STAT_TIMER(¶m,&lastime);
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if (ftime) *ftime = lastime, *ftime /= 1.e2;
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if (!(vmserror&1)) oserror = EINTR;
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default : /**** Operation code error */
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return (oserror ? -1 : lastime);
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/*==========================================================================*/
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long oshela(op, ftime)
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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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.PURPOSE Gets ELAPSED time. Precision is : 1 seconds.
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.RETURNS Elapsed time (s) on normal return.
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Value -1 if the operation to do is unknown or if
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the get operation was not preceded by an initialization.
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------------------------------------------------------------*/
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int op; /* IN: operation INIT_CLOCK / GET_CLOCK */
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long *ftime; /* OUT: Elapsed time in seconds */
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static long firstime = 0;
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register long lastime;
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if (ftime) *ftime = 0;
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{ case INIT_CLOCK : /**** Initialize timer */
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firstime = oshtime();
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case GET_CLOCK : /**** get time */
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lastime = oshtime() - firstime;
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if (ftime) *ftime = lastime;
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default : /**** Operation code error */
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return (oserror ? -1 : lastime);
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/*==========================================================================*/
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int oshcmd(command, input, output, error)
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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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.PURPOSE Executes system command(maybe with arguments).
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The routine defines also
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the pathnames for standard input, output and error units.
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Enviroment variable SHELL must be defined.
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.RETURNS Value 0 on normal return / -1 if error.
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.REMARKS error parameter ignored for VMS.
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------------------------------------------------------------*/
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char *command; /* IN : system command */
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char *input; /* IN : standard input stream */
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char *output; /* IN : standard output stream */
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char *error; /* IN : error output stream */
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static unsigned int attr_list = 0;
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static descript sdv_com = void_string;
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static descript sdv_in = void_string;
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static descript sdv_out = InitDescript(tr_buf);
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SET_STRING(sdv_com, command);
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in = (input ? &sdv_in : 0);
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out = (output ? &sdv_out: 0);
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if (in) SET_STRING(sdv_in, input);
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if (out) SET_STRING(sdv_out, output);
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vmserror = LIB$SPAWN(&sdv_com, in, out);
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if (!(vmserror&1)) oserror = EINTR;
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return (oserror ? -1 : 0);
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/*==========================================================================*/
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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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.PURPOSE Executes system command(maybe with arguments).
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.RETURNS Value 0 on normal return / -1 if error.
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.REMARKS Stops the program !
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------------------------------------------------------------*/
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char *command; /* IN : system command */
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static descript sdv_com = void_string;
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SET_STRING(sdv_com, command);
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vmserror = LIB$DO_COMMAND(&sdv_com);
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if (!(vmserror&1)) oserror = EINTR;
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return (oserror ? -1 : 0);
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char * oshmcpy(s1, s2, n)
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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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.PURPOSE copies n characters from memory area s2 to s1.
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.RETURNS It returns s1.
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.REMARKS System dependencies: none.
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------------------------------------------------------------*/
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register char *s1, *s2;
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register char *os1 = s1;
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int oshdate(date_string, date_struct)
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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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.PURPOSE Gets date and time stamp. No special structure adopted.
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.RETURNS A pointer to the time structure is defined in <time.h> (system)
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{\begin{TeX} \begin{itemize} \item int tm_year number
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\item int tm_mon number [0-11] \item int tm_mday [1-31]
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\item int tm_yday [0-355] \item int tm_wday [0-6] (Sunday = 0)
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\item int tm_hour [0-23] \item int tm_min [0-59]
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\item int tm_sec [0-59]. \item int tm_saving
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\end{itemize} \end{TeX}}
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.REMARKS System dependencies:
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--Not implemented for VMS
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------------------------------------------------------------*/
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char date_string[28]; /* OUT : date-time stamp */
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struct tm *date_struct; /* OUT : date-time structure (see description) */
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/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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.PURPOSE Change current working directory.
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.RETURNS Value 0 on normal return. -1 on failure and oserror set.
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.REMARKS System dependencies:
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------------------------------------------------------------*/
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if (chdir(path) == -1) {
added
removed
libsrc/os/vms/osh.c
