From: François Pinard Date: Wed, 16 Nov 1994 02:45:20 +0000 (+0000) Subject: Initial revision X-Git-Url: https://git.brokenzipper.com/gitweb?a=commitdiff_plain;h=42d9112d1e64a930a3a2bd184414cba4df80ef7a;p=chaz%2Ftar Initial revision --- diff --git a/src/rmt.c b/src/rmt.c new file mode 100644 index 0000000..b44a8d3 --- /dev/null +++ b/src/rmt.c @@ -0,0 +1,254 @@ +/* + * Copyright (c) 1983 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by the University of California, Berkeley. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +#ifndef lint +char copyright[] = +"@(#) Copyright (c) 1983 Regents of the University of California.\n\ + All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)rmt.c 5.4 (Berkeley) 6/29/88"; +#endif /* not lint */ + +/* JF added #ifdef about SO_RCVBUF in attempt to make this run on more + machines. Maybe it'll work */ +/* + * rmt + */ +#include +#include +#include +#include +#include +#include + +#if defined (i386) && defined (AIX) +#include +#endif + +int tape = -1; + +char *record; +int maxrecsize = -1; +char *checkbuf(); + +#define SSIZE 64 +char device[SSIZE]; +char count[SSIZE], mode[SSIZE], pos[SSIZE], op[SSIZE]; + +extern errno; +extern char *sys_errlist[]; +char resp[BUFSIZ]; + +long lseek(); + +FILE *debug; +#define DEBUG(f) if (debug) fprintf(debug, f) +#define DEBUG1(f,a) if (debug) fprintf(debug, f, a) +#define DEBUG2(f,a1,a2) if (debug) fprintf(debug, f, a1, a2) + +main(argc, argv) + int argc; + char **argv; +{ + int rval; + char c; + int n, i, cc; + + argc--, argv++; + if (argc > 0) { + debug = fopen(*argv, "w"); + if (debug == 0) + exit(1); + (void) setbuf(debug, (char *)0); + } +top: + errno = 0; + rval = 0; + if (read(0, &c, 1) != 1) + exit(0); + switch (c) { + + case 'O': + if (tape >= 0) + (void) close(tape); + getstring(device); getstring(mode); + DEBUG2("rmtd: O %s %s\n", device, mode); +#if defined (i386) && defined (AIX) + /* This is alleged to fix a byte ordering problem. */ + /* I'm quite suspicious if it's right. -- mib */ + { + int oflag = atoi (mode); + int nflag = 0; + if ((oflag & 3) == 0) + nflag |= O_RDONLY; + if (oflag & 1) + nflag |= O_WRONLY; + if (oflag & 2) + nflag |= O_RDWR; + if (oflag & 0x0008) + nflag |= O_APPEND; + if (oflag & 0x0200) + nflag |= O_CREAT; + if (oflag & 0x0400) + nflag |= O_TRUNC; + if (oflag & 0x0800) + nflag |= O_EXCL; + tape = open (device, nflag, 0666); + } +#else + tape = open(device, atoi(mode),0666); +#endif + if (tape < 0) + goto ioerror; + goto respond; + + case 'C': + DEBUG("rmtd: C\n"); + getstring(device); /* discard */ + if (close(tape) < 0) + goto ioerror; + tape = -1; + goto respond; + + case 'L': + getstring(count); getstring(pos); + DEBUG2("rmtd: L %s %s\n", count, pos); + rval = lseek(tape, (long) atoi(count), atoi(pos)); + if (rval < 0) + goto ioerror; + goto respond; + + case 'W': + getstring(count); + n = atoi(count); + DEBUG1("rmtd: W %s\n", count); + record = checkbuf(record, n); + for (i = 0; i < n; i += cc) { + cc = read(0, &record[i], n - i); + if (cc <= 0) { + DEBUG("rmtd: premature eof\n"); + exit(2); + } + } + rval = write(tape, record, n); + if (rval < 0) + goto ioerror; + goto respond; + + case 'R': + getstring(count); + DEBUG1("rmtd: R %s\n", count); + n = atoi(count); + record = checkbuf(record, n); + rval = read(tape, record, n); + if (rval < 0) + goto ioerror; + (void) sprintf(resp, "A%d\n", rval); + (void) write(1, resp, strlen(resp)); + (void) write(1, record, rval); + goto top; + + case 'I': + getstring(op); getstring(count); + DEBUG2("rmtd: I %s %s\n", op, count); + { struct mtop mtop; + mtop.mt_op = atoi(op); + mtop.mt_count = atoi(count); + if (ioctl(tape, MTIOCTOP, (char *)&mtop) < 0) + goto ioerror; + rval = mtop.mt_count; + } + goto respond; + + case 'S': /* status */ + DEBUG("rmtd: S\n"); + { struct mtget mtget; + if (ioctl(tape, MTIOCGET, (char *)&mtget) < 0) + goto ioerror; + rval = sizeof (mtget); + (void) sprintf(resp, "A%d\n", rval); + (void) write(1, resp, strlen(resp)); + (void) write(1, (char *)&mtget, sizeof (mtget)); + goto top; + } + + default: + DEBUG1("rmtd: garbage command %c\n", c); + exit(3); + } +respond: + DEBUG1("rmtd: A %d\n", rval); + (void) sprintf(resp, "A%d\n", rval); + (void) write(1, resp, strlen(resp)); + goto top; +ioerror: + error(errno); + goto top; +} + +getstring(bp) + char *bp; +{ + int i; + char *cp = bp; + + for (i = 0; i < SSIZE; i++) { + if (read(0, cp+i, 1) != 1) + exit(0); + if (cp[i] == '\n') + break; + } + cp[i] = '\0'; +} + +char * +checkbuf(record, size) + char *record; + int size; +{ + extern char *malloc(); + + if (size <= maxrecsize) + return (record); + if (record != 0) + free(record); + record = malloc(size); + if (record == 0) { + DEBUG("rmtd: cannot allocate buffer space\n"); + exit(4); + } + maxrecsize = size; +#ifdef SO_RCVBUF + while (size > 1024 && + setsockopt(0, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)) < 0) + size -= 1024; +#else + size= 1+((size-1)%1024); +#endif + return (record); +} + +error(num) + int num; +{ + + DEBUG2("rmtd: E %d (%s)\n", num, sys_errlist[num]); + (void) sprintf(resp, "E%d\n%s\n", num, sys_errlist[num]); + (void) write(1, resp, strlen (resp)); +}