/* $OpenBSD: interactive.c,v 1.14 2002/02/16 21:27:37 millert Exp $ */ /* $NetBSD: interactive.c,v 1.10 1997/03/19 08:42:52 lukem Exp $ */ /* * Copyright (c) 1985, 1993 * The 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 #if 0 static char sccsid[] = "@(#)interactive.c 8.3 (Berkeley) 9/13/94"; #else static char rcsid[] = "$OpenBSD: interactive.c,v 1.14 2002/02/16 21:27:37 millert Exp $"; #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "restore.h" #include "extern.h" #define round(a, b) (((a) + (b) - 1) / (b) * (b)) /* * Things to handle interruptions. */ static int runshell; static jmp_buf reset; static char *nextarg = NULL; /* * Structure and routines associated with listing directories. */ struct afile { ino_t fnum; /* inode number of file */ char *fname; /* file name */ short len; /* name length */ char prefix; /* prefix character */ char postfix; /* postfix character */ }; struct arglist { int freeglob; /* glob structure needs to be freed */ int argcnt; /* next globbed argument to return */ glob_t glob; /* globbing information */ char *cmd; /* the current command */ }; static char *copynext(char *, char *); static int fcmp(const void *, const void *); static void formatf(struct afile *, int); static void getcmd(char *, char *, char *, struct arglist *); struct dirent *glob_readdir(RST_DIR *dirp); static int glob_stat(const char *, struct stat *); static void mkentry(char *, struct direct *, struct afile *); static void printlist(char *, char *); /* * Read and execute commands from the terminal. */ void runcmdshell() { struct entry *np; ino_t ino; struct arglist arglist; char curdir[MAXPATHLEN]; char name[MAXPATHLEN]; char cmd[BUFSIZ]; arglist.freeglob = 0; arglist.argcnt = 0; arglist.glob.gl_flags = GLOB_ALTDIRFUNC; arglist.glob.gl_opendir = (void *)rst_opendir; arglist.glob.gl_readdir = (void *)glob_readdir; arglist.glob.gl_closedir = (void *)rst_closedir; arglist.glob.gl_lstat = glob_stat; arglist.glob.gl_stat = glob_stat; canon("/", curdir); loop: if (setjmp(reset) != 0) { if (arglist.freeglob != 0) { arglist.freeglob = 0; arglist.argcnt = 0; globfree(&arglist.glob); } nextarg = NULL; volno = 0; } runshell = 1; getcmd(curdir, cmd, name, &arglist); switch (cmd[0]) { /* * Add elements to the extraction list. */ case 'a': if (strncmp(cmd, "add", strlen(cmd)) != 0) goto bad; ino = dirlookup(name); if (ino == 0) break; if (mflag) pathcheck(name); treescan(name, ino, addfile); break; /* * Change working directory. */ case 'c': if (strncmp(cmd, "cd", strlen(cmd)) != 0) goto bad; ino = dirlookup(name); if (ino == 0) break; if (inodetype(ino) == LEAF) { fprintf(stderr, "%s: not a directory\n", name); break; } (void)strlcpy(curdir, name, sizeof curdir); break; /* * Delete elements from the extraction list. */ case 'd': if (strncmp(cmd, "delete", strlen(cmd)) != 0) goto bad; np = lookupname(name); if (np == NULL || (np->e_flags & NEW) == 0) { fprintf(stderr, "%s: not on extraction list\n", name); break; } treescan(name, np->e_ino, deletefile); break; /* * Extract the requested list. */ case 'e': if (strncmp(cmd, "extract", strlen(cmd)) != 0) goto bad; createfiles(); createlinks(); setdirmodes(0); if (dflag) checkrestore(); volno = 0; break; /* * List available commands. */ case 'h': if (strncmp(cmd, "help", strlen(cmd)) != 0) goto bad; case '?': fprintf(stderr, "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", "Available commands are:\n", "\tls [arg] - list directory\n", "\tcd arg - change directory\n", "\tpwd - print current directory\n", "\tadd [arg] - add `arg' to list of", " files to be extracted\n", "\tdelete [arg] - delete `arg' from", " list of files to be extracted\n", "\textract - extract requested files\n", "\tsetmodes - set modes of requested directories\n", "\tquit - immediately exit program\n", "\twhat - list dump header information\n", "\tverbose - toggle verbose flag", " (useful with ``ls'')\n", "\thelp or `?' - print this list\n", "If no `arg' is supplied, the current", " directory is used\n"); break; /* * List a directory. */ case 'l': if (strncmp(cmd, "ls", strlen(cmd)) != 0) goto bad; printlist(name, curdir); break; /* * Print current directory. */ case 'p': if (strncmp(cmd, "pwd", strlen(cmd)) != 0) goto bad; if (curdir[1] == '\0') fprintf(stderr, "/\n"); else fprintf(stderr, "%s\n", &curdir[1]); break; /* * Quit. */ case 'q': if (strncmp(cmd, "quit", strlen(cmd)) != 0) goto bad; return; case 'x': if (strncmp(cmd, "xit", strlen(cmd)) != 0) goto bad; return; /* * Toggle verbose mode. */ case 'v': if (strncmp(cmd, "verbose", strlen(cmd)) != 0) goto bad; if (vflag) { fprintf(stderr, "verbose mode off\n"); vflag = 0; break; } fprintf(stderr, "verbose mode on\n"); vflag++; break; /* * Just restore requested directory modes. */ case 's': if (strncmp(cmd, "setmodes", strlen(cmd)) != 0) goto bad; setdirmodes(FORCE); break; /* * Print out dump header information. */ case 'w': if (strncmp(cmd, "what", strlen(cmd)) != 0) goto bad; printdumpinfo(); break; /* * Turn on debugging. */ case 'D': if (strncmp(cmd, "Debug", strlen(cmd)) != 0) goto bad; if (dflag) { fprintf(stderr, "debugging mode off\n"); dflag = 0; break; } fprintf(stderr, "debugging mode on\n"); dflag++; break; /* * Unknown command. */ default: bad: fprintf(stderr, "%s: unknown command; type ? for help\n", cmd); break; } goto loop; } /* * Read and parse an interactive command. * The first word on the line is assigned to "cmd". If * there are no arguments on the command line, then "curdir" * is returned as the argument. If there are arguments * on the line they are returned one at a time on each * successive call to getcmd. Each argument is first assigned * to "name". If it does not start with "/" the pathname in * "curdir" is prepended to it. Finally "canon" is called to * eliminate any embedded ".." components. */ static void getcmd(curdir, cmd, name, ap) char *curdir, *cmd, *name; struct arglist *ap; { char *cp; static char input[BUFSIZ]; char output[BUFSIZ]; # define rawname input /* save space by reusing input buffer */ int globretval; /* * Check to see if still processing arguments. */ if (ap->argcnt > 0) goto retnext; if (nextarg != NULL) goto getnext; /* * Read a command line and trim off trailing white space. */ do { (void)fprintf(stderr, "%s > ", __progname); (void)fflush(stderr); (void)fgets(input, BUFSIZ, terminal); } while (!feof(terminal) && input[0] == '\n'); if (feof(terminal)) { (void)strcpy(cmd, "quit"); return; } for (cp = &input[strlen(input) - 2]; *cp == ' ' || *cp == '\t'; cp--) /* trim off trailing white space and newline */; *++cp = '\0'; /* * Copy the command into "cmd". */ cp = copynext(input, cmd); ap->cmd = cmd; /* * If no argument, use curdir as the default. */ if (*cp == '\0') { (void)strlcpy(name, curdir, MAXPATHLEN); return; } nextarg = cp; /* * Find the next argument. */ getnext: cp = copynext(nextarg, rawname); if (*cp == '\0') nextarg = NULL; else nextarg = cp; /* * If it is an absolute pathname, canonicalize it and return it. */ if (rawname[0] == '/') { canon(rawname, name); } else { /* * For relative pathnames, prepend the current directory to * it then canonicalize and return it. */ snprintf(output, sizeof(output), "%s/%s", curdir, rawname); canon(output, name); } if ((globretval = glob(name, GLOB_ALTDIRFUNC | GLOB_NOESCAPE, NULL, &ap->glob)) < 0) { fprintf(stderr, "%s: %s: ", ap->cmd, name); switch (globretval) { case GLOB_NOSPACE: fprintf(stderr, "out of memory\n"); break; case GLOB_NOMATCH: fprintf(stderr, "no filename match.\n"); break; case GLOB_ABORTED: fprintf(stderr, "glob() aborted.\n"); break; default: fprintf(stderr, "unknown error!\n"); break; } } if (ap->glob.gl_pathc == 0) return; ap->freeglob = 1; ap->argcnt = ap->glob.gl_pathc; retnext: strlcpy(name, ap->glob.gl_pathv[ap->glob.gl_pathc - ap->argcnt], MAXPATHLEN); if (--ap->argcnt == 0) { ap->freeglob = 0; globfree(&ap->glob); } # undef rawname } /* * Strip off the next token of the input. */ static char * copynext(input, output) char *input, *output; { char *cp, *bp; char quote; for (cp = input; *cp == ' ' || *cp == '\t'; cp++) /* skip to argument */; bp = output; while (*cp != ' ' && *cp != '\t' && *cp != '\0') { /* * Handle back slashes. */ if (*cp == '\\') { if (*++cp == '\0') { fprintf(stderr, "command lines cannot be continued\n"); continue; } *bp++ = *cp++; continue; } /* * The usual unquoted case. */ if (*cp != '\'' && *cp != '"') { *bp++ = *cp++; continue; } /* * Handle single and double quotes. */ quote = *cp++; while (*cp != quote && *cp != '\0') *bp++ = *cp++; if (*cp++ == '\0') { fprintf(stderr, "missing %c\n", quote); cp--; continue; } } *bp = '\0'; return (cp); } /* * Canonicalize file names to always start with ``./'' and * remove any imbedded "." and ".." components. */ void canon(rawname, canonname) char *rawname, *canonname; { char *cp, *np; if (strcmp(rawname, ".") == 0 || strncmp(rawname, "./", 2) == 0) (void)strcpy(canonname, ""); else if (rawname[0] == '/') (void)strcpy(canonname, "."); else (void)strcpy(canonname, "./"); (void)strlcat(canonname, rawname, MAXPATHLEN); /* * Eliminate multiple and trailing '/'s */ for (cp = np = canonname; *np != '\0'; cp++) { *cp = *np++; while (*cp == '/' && *np == '/') np++; } *cp = '\0'; if (*--cp == '/') *cp = '\0'; /* * Eliminate extraneous "." and ".." from pathnames. */ for (np = canonname; *np != '\0'; ) { np++; cp = np; while (*np != '/' && *np != '\0') np++; if (np - cp == 1 && *cp == '.') { cp--; (void)strcpy(cp, np); np = cp; } if (np - cp == 2 && strncmp(cp, "..", 2) == 0) { cp--; while (cp > &canonname[1] && *--cp != '/') /* find beginning of name */; (void)strcpy(cp, np); np = cp; } } } /* * Do an "ls" style listing of a directory */ static void printlist(name, basename) char *name; char *basename; { struct afile *fp, *list, *listp = NULL; struct direct *dp; struct afile single; RST_DIR *dirp; int entries, len, namelen; char locname[MAXPATHLEN]; dp = pathsearch(name); if (dp == NULL || (!dflag && TSTINO(dp->d_ino, dumpmap) == 0) || (!vflag && dp->d_ino == WINO)) return; if ((dirp = rst_opendir(name)) == NULL) { entries = 1; list = &single; mkentry(name, dp, list); len = strlen(basename) + 1; if (strlen(name) - len > single.len) { freename(single.fname); single.fname = savename(&name[len]); single.len = strlen(single.fname); } } else { entries = 0; while ((dp = rst_readdir(dirp))) entries++; rst_closedir(dirp); list = (struct afile *)malloc(entries * sizeof(struct afile)); if (list == NULL) { fprintf(stderr, "ls: out of memory\n"); return; } if ((dirp = rst_opendir(name)) == NULL) panic("directory reopen failed\n"); fprintf(stderr, "%s:\n", name); entries = 0; listp = list; namelen = snprintf(locname, sizeof(locname), "%s/", name); if (namelen >= sizeof(locname)) namelen = sizeof(locname) - 1; while ((dp = rst_readdir(dirp))) { if (dp == NULL) break; if (!dflag && TSTINO(dp->d_ino, dumpmap) == 0) continue; if (!vflag && (dp->d_ino == WINO || strcmp(dp->d_name, ".") == 0 || strcmp(dp->d_name, "..") == 0)) continue; locname[namelen] = '\0'; if (namelen + dp->d_namlen >= MAXPATHLEN) { fprintf(stderr, "%s%s: name exceeds %d char\n", locname, dp->d_name, MAXPATHLEN); } else { (void)strncat(locname, dp->d_name, (int)dp->d_namlen); mkentry(locname, dp, listp++); entries++; } } rst_closedir(dirp); if (entries == 0) { fprintf(stderr, "\n"); free(list); return; } qsort((char *)list, entries, sizeof(struct afile), fcmp); } formatf(list, entries); if (dirp != NULL) { for (fp = listp - 1; fp >= list; fp--) freename(fp->fname); fprintf(stderr, "\n"); free(list); } } /* * Read the contents of a directory. */ static void mkentry(name, dp, fp) char *name; struct direct *dp; struct afile *fp; { char *cp; struct entry *np; fp->fnum = dp->d_ino; fp->fname = savename(dp->d_name); for (cp = fp->fname; *cp; cp++) if (!vflag && (*cp < ' ' || *cp >= 0177)) *cp = '?'; fp->len = cp - fp->fname; if (dflag && TSTINO(fp->fnum, dumpmap) == 0) fp->prefix = '^'; else if ((np = lookupname(name)) != NULL && (np->e_flags & NEW)) fp->prefix = '*'; else fp->prefix = ' '; switch(dp->d_type) { default: fprintf(stderr, "Warning: undefined file type %d\n", dp->d_type); /* fall through */ case DT_REG: fp->postfix = ' '; break; case DT_LNK: fp->postfix = '@'; break; case DT_FIFO: case DT_SOCK: fp->postfix = '='; break; case DT_CHR: case DT_BLK: fp->postfix = '#'; break; case DT_WHT: fp->postfix = '%'; break; case DT_UNKNOWN: case DT_DIR: if (inodetype(dp->d_ino) == NODE) fp->postfix = '/'; else fp->postfix = ' '; break; } return; } /* * Print out a pretty listing of a directory */ static void formatf(list, nentry) struct afile *list; int nentry; { struct afile *fp, *endlist; int width, bigino, haveprefix, havepostfix; int i, j, w, precision = 0, columns, lines; width = 0; haveprefix = 0; havepostfix = 0; bigino = ROOTINO; endlist = &list[nentry]; for (fp = &list[0]; fp < endlist; fp++) { if (bigino < fp->fnum) bigino = fp->fnum; if (width < fp->len) width = fp->len; if (fp->prefix != ' ') haveprefix = 1; if (fp->postfix != ' ') havepostfix = 1; } if (haveprefix) width++; if (havepostfix) width++; if (vflag) { for (precision = 0, i = bigino; i > 0; i /= 10) precision++; width += precision + 1; } width++; columns = 81 / width; if (columns == 0) columns = 1; lines = (nentry + columns - 1) / columns; for (i = 0; i < lines; i++) { for (j = 0; j < columns; j++) { fp = &list[j * lines + i]; if (vflag) { fprintf(stderr, "%*d ", precision, fp->fnum); fp->len += precision + 1; } if (haveprefix) { putc(fp->prefix, stderr); fp->len++; } fprintf(stderr, "%s", fp->fname); if (havepostfix) { putc(fp->postfix, stderr); fp->len++; } if (fp + lines >= endlist) { fprintf(stderr, "\n"); break; } for (w = fp->len; w < width; w++) putc(' ', stderr); } } } /* * Skip over directory entries that are not on the tape * * First have to get definition of a dirent. */ #undef DIRBLKSIZ #include #undef d_ino struct dirent * glob_readdir(dirp) RST_DIR *dirp; { struct direct *dp; static struct dirent adirent; while ((dp = rst_readdir(dirp)) != NULL) { if (!vflag && dp->d_ino == WINO) continue; if (dflag || TSTINO(dp->d_ino, dumpmap)) break; } if (dp == NULL) return (NULL); adirent.d_fileno = dp->d_ino; adirent.d_namlen = dp->d_namlen; memcpy(adirent.d_name, dp->d_name, dp->d_namlen + 1); return (&adirent); } /* * Return st_mode information in response to stat or lstat calls */ static int glob_stat(name, stp) const char *name; struct stat *stp; { struct direct *dp; dp = pathsearch(name); if (dp == NULL || (!dflag && TSTINO(dp->d_ino, dumpmap) == 0) || (!vflag && dp->d_ino == WINO)) return (-1); if (inodetype(dp->d_ino) == NODE) stp->st_mode = S_IFDIR; else stp->st_mode = S_IFREG; return (0); } /* * Comparison routine for qsort. */ static int fcmp(f1, f2) const void *f1, *f2; { return (strcmp(((struct afile *)f1)->fname, ((struct afile *)f2)->fname)); } /* * respond to interrupts */ void onintr(signo) int signo; { int save_errno = errno; if (command == 'i' && runshell) longjmp(reset, 1); /* XXX signal/longjmp reentrancy */ if (reply("restore interrupted, continue") == FAIL) /* XXX signal race */ _exit(1); errno = save_errno; }