/* $OpenBSD: rmt.c,v 1.10 2002/11/08 05:07:34 millert Exp $ */ /* * Copyright (c) 1983 Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #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[] = "from: @(#)rmt.c 5.6 (Berkeley) 6/1/90";*/ static char rcsid[] = "$Id: rmt.c,v 1.10 2002/11/08 05:07:34 millert Exp $"; #endif /* not lint */ /* * rmt */ #include #include #include #include #include #include #include #include #include #include #include int tape = -1; char *record; int maxrecsize = -1; #define STRSIZE 64 char device[STRSIZE]; char count[STRSIZE], mode[STRSIZE], pos[STRSIZE], op[STRSIZE]; char resp[BUFSIZ]; 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) char *checkbuf(char *, int); void getstring(char *, int); void error(int); int main(int argc, char *argv[]) { off_t orval; 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(STDIN_FILENO, &c, 1) != 1) exit(0); switch (c) { case 'O': if (tape >= 0) (void) close(tape); getstring(device, sizeof(device)); getstring(mode, sizeof(mode)); DEBUG2("rmtd: O %s %s\n", device, mode); tape = open(device, atoi(mode), S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH); if (tape == -1) goto ioerror; goto respond; case 'C': DEBUG("rmtd: C\n"); getstring(device, sizeof(device)); /* discard */ if (close(tape) == -1) goto ioerror; tape = -1; goto respond; case 'L': getstring(count, sizeof(count)); getstring(pos, sizeof(pos)); DEBUG2("rmtd: L %s %s\n", count, pos); orval = lseek(tape, strtoq(count, NULL, 0), atoi(pos)); if (orval == -1) goto ioerror; goto respond; case 'W': getstring(count, sizeof(count)); n = atoi(count); DEBUG1("rmtd: W %s\n", count); record = checkbuf(record, n); for (i = 0; i < n; i += cc) { cc = read(STDIN_FILENO, &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, sizeof(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) snprintf(resp, sizeof resp, "A%d\n", rval); (void) write(STDOUT_FILENO, resp, strlen(resp)); (void) write(STDOUT_FILENO, record, rval); goto top; case 'I': getstring(op, sizeof(op)); getstring(count, sizeof(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) == -1) goto ioerror; rval = mtop.mt_count; } goto respond; case 'S': /* status */ DEBUG("rmtd: S\n"); { struct mtget mtget; if (ioctl(tape, MTIOCGET, (char *)&mtget) == -1) goto ioerror; rval = sizeof (mtget); (void) snprintf(resp, sizeof resp, "A%d\n", rval); (void) write(STDOUT_FILENO, resp, strlen(resp)); (void) write(STDOUT_FILENO, (char *)&mtget, sizeof (mtget)); goto top; } default: DEBUG1("rmtd: garbage command %c\n", c); exit(3); } respond: DEBUG1("rmtd: A %d\n", rval); (void) snprintf(resp, sizeof resp, "A%d\n", rval); (void) write(STDOUT_FILENO, resp, strlen(resp)); goto top; ioerror: error(errno); goto top; } void getstring(char *bp, int size) { char *cp = bp; char *ep = bp + size - 1; do { if (read(STDIN_FILENO, cp, 1) != 1) exit(0); } while (*cp != '\n' && ++cp < ep); *cp = '\0'; } char * checkbuf(char *record, int size) { 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; while (size > 1024 && setsockopt(0, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)) == -1) size -= 1024; return (record); } void error(int num) { DEBUG2("rmtd: E %d (%s)\n", num, strerror(num)); (void) snprintf(resp, sizeof (resp), "E%d\n%s\n", num, strerror(num)); (void) write(STDOUT_FILENO, resp, strlen(resp)); }