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Annotation of 43BSD/contrib/news/src/batch.c, revision 1.1

1.1     ! root        1: 
        !             2: /*
        !             3:  * This software is Copyright (c) 1985 by Rick Adams.
        !             4:  *
        !             5:  * Permission is hereby granted to copy, reproduce, redistribute or
        !             6:  * otherwise use this software as long as: there is no monetary
        !             7:  * profit gained specifically from the use or reproduction or this
        !             8:  * software, it is not sold, rented, traded or otherwise marketed, and
        !             9:  * this copyright notice is included prominently in any copy
        !            10:  * made.
        !            11:  *
        !            12:  * The author make no claims as to the fitness or correctness of
        !            13:  * this software for any use whatsoever, and it is provided as is. 
        !            14:  * Any use of this software is at the user's own risk.
        !            15:  *
        !            16:  * Batch: program to batch a list of news articles into an unbatch script.
        !            17:  * Usage: /usr/lib/news/batch listfile [bytecount]
        !            18:  *  where listfile is a file containing a list, one per line, of full
        !            19:  *  path names of files containing articles, e.g. as produced by the F
        !            20:  *  transmission option in the sys file.
        !            21:  *  bytecount is the maximum number of bytes to output before exiting
        !            22:  * Output is placed on standard output.
        !            23:  *
        !            24:  * Intended usage:
        !            25:  *
        !            26:  *     With the shellfile "sendbatch", with machine names as arguments:
        !            27:  *             e.g
        !            28:  *             sendbatch rlgvax seismo
        !            29:  *
        !            30:  * This would be invoked every hour or two from crontab.
        !            31:  *
        !            32:  */
        !            33: 
        !            34: #ifdef SCCSID
        !            35: static char    *SccsId = "@(#)batch.c  1.15    1/17/86";
        !            36: #endif /* SCCSID */
        !            37: 
        !            38: #include <stdio.h>
        !            39: #include <sys/types.h>
        !            40: #include <sys/stat.h>
        !            41: #include <errno.h>
        !            42: #include "defs.h"
        !            43: 
        !            44: #if defined(USG) || defined(BSD4_2) || defined(BSD4_1C)
        !            45: #include <fcntl.h>
        !            46: #endif
        !            47: 
        !            48: struct stat sbuf;
        !            49: 
        !            50: extern int errno;
        !            51: extern char *sys_errlist[];
        !            52: 
        !            53: main(argc,argv)
        !            54: char **argv;
        !            55: {
        !            56:        register FILE *fd, *nfd;
        !            57:        register int c;
        !            58:        register long n;
        !            59:        register char *cp;
        !            60:        char *fdstatus;
        !            61:        long maxbytes, nbytes;
        !            62:        long atol();
        !            63:        char fname[512];
        !            64:        char workfile[512];
        !            65:        char *index(), *fgets();
        !            66: 
        !            67:        if (argc < 2) {
        !            68:                fprintf(stderr, "Usage: batch listfile [bytecount]\n");
        !            69:                exit(1);
        !            70:        }
        !            71: 
        !            72:        /*
        !            73:         * Rename real file to a work name to avoid race conditions.
        !            74:         * If workfile exists skip the rename in order
        !            75:         * to recover from a crash w/o losing anything.
        !            76:         */
        !            77:        (void) strcpy(workfile, argv[1]);
        !            78:        (void) strcat(workfile, ".work");
        !            79:        if (access(workfile, 0) < 0) {
        !            80:                if (access(argv[1], 0) < 0 && errno == ENOENT)
        !            81:                        exit(0);        /* no news */
        !            82:                if (rename(argv[1], workfile) < 0) {
        !            83:                        logerror("rename(%s,%s) %s", argv[1], workfile,
        !            84:                                sys_errlist[errno]);
        !            85:                        exit(1);
        !            86:                }
        !            87:        }
        !            88:        fd = fopen(workfile, "r");
        !            89:        if (fd == NULL) {
        !            90:                logerror("fopen(%s,r) %s", workfile, sys_errlist[errno]);
        !            91:                exit(1);
        !            92:        }
        !            93: 
        !            94:        if (argc > 2)
        !            95:                maxbytes = atol(argv[2]);
        !            96:        else
        !            97:                maxbytes = 100000000L; /* backwards compatible */
        !            98:        nbytes = 0;
        !            99:        while ((fdstatus = fgets(fname, sizeof fname, fd)) != NULL) {
        !           100:                cp = index(fname, '\n');
        !           101:                if (cp)
        !           102:                        *cp = '\0';
        !           103:                nfd = fopen(fname, "r");
        !           104:                if (nfd == NULL) {
        !           105:                        perror(fname);
        !           106:                        continue;
        !           107:                }
        !           108:                (void) fstat(fileno(nfd), &sbuf);
        !           109:                if (cp)
        !           110:                        *cp = '\n';
        !           111:                nbytes += sbuf.st_size;
        !           112:                if (nbytes > maxbytes && nbytes != sbuf.st_size)
        !           113:                        break;
        !           114:                printf("#! rnews %ld\n", (long)sbuf.st_size);
        !           115:                /* guess length of #! rnews string */
        !           116:                nbytes += 13;
        !           117:                n = 0;
        !           118:                while ((c = getc(nfd)) != EOF) {
        !           119:                        putchar(c);
        !           120:                        n++;
        !           121:                }
        !           122:                (void) fclose(nfd);
        !           123:                if (ferror(stdout)){
        !           124:                        logerror("stdout write %s", sys_errlist[errno]);
        !           125:                        exit(1);
        !           126:                }
        !           127:                if (n != sbuf.st_size) { /* paranoia */
        !           128:                        logerror("%s, expected %ld bytes, got %ld", fname,
        !           129:                                n, sbuf.st_size);
        !           130:                        /* breaking out of this early will end up resyncing
        !           131:                           the batch files (isn't serendipity wonderful?) */
        !           132:                        break;
        !           133:                }
        !           134:        }
        !           135:        if (fdstatus != NULL) {         /* exceeded maxbytes */
        !           136:                char tmpfile[512];
        !           137: 
        !           138:                (void) umask(2);
        !           139:                (void) strcpy(tmpfile, argv[1]);
        !           140:                (void) strcat(tmpfile, ".tmp");
        !           141:                nfd = fopen(tmpfile, "w");
        !           142:                if (nfd == NULL) {
        !           143:                        logerror("fopen(%s,w) %s", tmpfile, sys_errlist[errno]);
        !           144:                        exit(1);
        !           145:                }
        !           146:                do {
        !           147:                        fputs(fname, nfd);
        !           148:                } while (fgets(fname, sizeof fname, fd) != NULL);
        !           149:                if (ferror(nfd)) {
        !           150:                        logerror("write(%s) %s", tmpfile, sys_errlist[errno]);
        !           151:                        exit(1);
        !           152:                }
        !           153:                (void) fclose(nfd);
        !           154:                (void) fclose(fd);
        !           155:                /* will pick it up next time thru */
        !           156:                if (rename(tmpfile, workfile) < 0) {
        !           157:                        logerror("rename(%s,%s) %s", tmpfile, workfile,
        !           158:                                sys_errlist[errno]);
        !           159:                        exit(1);
        !           160:                }
        !           161:        }               
        !           162:        else
        !           163:                (void) unlink(workfile);
        !           164:        exit(0);
        !           165: }
        !           166: 
        !           167: /*
        !           168:  * Log the given message, with printf strings and parameters allowed,
        !           169:  * on the log file, if it can be written.
        !           170:  */
        !           171: /* VARARGS1 */
        !           172: logerror(fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9)
        !           173: char *fmt;
        !           174: {
        !           175:        FILE *logfile;
        !           176:        char lfname[BUFLEN];            /* the log file */
        !           177:        char bfr[BUFLEN];
        !           178:        char *logtime, *ctime(); 
        !           179:        time_t t;
        !           180: 
        !           181:        (void) time(&t);
        !           182:        logtime = ctime(&t);
        !           183:        logtime[16] = 0;
        !           184:        logtime += 4;
        !           185: 
        !           186: #ifdef IHCC
        !           187:        (void) sprintf(lfname, "%s/%s/errlog", logdir(HOME), LIBDIR);
        !           188: #else
        !           189:        (void) sprintf(lfname, "%s/errlog", LIBDIR);
        !           190: #endif
        !           191: 
        !           192:        (void) sprintf(bfr, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9);
        !           193:        fprintf(stderr, bfr);
        !           194:        if (access(lfname, 0) == 0 && (logfile = fopen(lfname, "a")) != NULL) {
        !           195: #if defined(USG) || defined(BSD4_2) || defined(BSD4_1C)
        !           196:                int flags;
        !           197:                flags = fcntl(fileno(logfile), F_GETFL, 0);
        !           198:                (void) fcntl(fileno(logfile), F_SETFL, flags|O_APPEND);
        !           199: #else /* v7 */
        !           200:                (void) lseek(fileno(logfile), 0L, 2);
        !           201: #endif /* v7 */
        !           202:                fprintf(logfile, "%s\tbatch\t%s\n", logtime, bfr);
        !           203:                (void) fclose(logfile);
        !           204:        }
        !           205: }
        !           206: 
        !           207: #if !defined(BSD4_2) && !defined(BSD4_1C)
        !           208: rename(from, to)
        !           209: register char *from, *to;
        !           210: {
        !           211:        (void) unlink(to);
        !           212:        if (link(from, to) < 0)
        !           213:                return -1;
        !           214: 
        !           215:        (void) unlink(from);
        !           216:        return 0;
        !           217: }
        !           218: #endif /* !BSD4_2 && !BSD4_1C */

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