Return to sysem.c CVS log

Up to [Research Unix] / researchv10dc / cmd / spitbol / ocint

Annotation of researchv10dc/cmd/spitbol/ocint/sysem.c, revision 1.1

1.1     ! root        1: /*
        !             2:  *     sysem
        !             3:  *
        !             4:  *     wa: error code number on input
        !             5:  *     xr: pointer to scblk with message text on output
        !             6:  */
        !             7: 
        !             8: #include "inter.h"
        !             9: #define MSGFILE "/usr/lib/vaxspitv35.err"
        !            10: #define MSGCHUNK 49
        !            11: 
        !            12: sysem()
        !            13: {
        !            14:        long msg;
        !            15:        static int fd = -1;
        !            16:        register char *p;
        !            17: 
        !            18:        msg = WA(long);
        !            19: 
        !            20:        /* any premature return gives a null result */
        !            21:        SET_XR(&tempstr);
        !            22:        tempstr.len = 0;
        !            23: 
        !            24:        /* we keep a file descriptor open after the first message */
        !            25:        if (fd < 0) {
        !            26:                fd = open (MSGFILE, 0);
        !            27:                if (fd < 0)
        !            28:                        return 0;
        !            29:        }
        !            30: 
        !            31:        /* calculate how far into the file to go and go there */
        !            32:        if (lseek (fd, (msg - 1) * MSGCHUNK, 0) < 0)
        !            33:                return 0;
        !            34: 
        !            35:        /* read the message, check for success */
        !            36:        if (read (fd, tempstr.s, MSGCHUNK - 1) != MSGCHUNK - 1)
        !            37:                return 0;
        !            38: 
        !            39:        /* cut trailing blanks */
        !            40:        p = tempstr.s + MSGCHUNK - 2;
        !            41:        while (*p == ' ' && p > tempstr.s)
        !            42:                p--;
        !            43: 
        !            44:        /* insert message length and return */
        !            45:        tempstr.len = p - tempstr.s + 1;
        !            46:        return 0;
        !            47: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.