/*- * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * Cimarron D. Taylor of the University of California, Berkeley. * * 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 static char sccsid[] = "@(#)function.c 5.17 (Berkeley) 5/24/91"; #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "find.h" #define FIND_EQUAL 0 #define FIND_LESSTHAN 1 #define FIND_GREATER 2 #define COMPARE(a, b) { \ switch(plan->flags) { \ case FIND_EQUAL: \ return(a == b); \ case FIND_LESSTHAN: \ return(a < b); \ case FIND_GREATER: \ return(a > b); \ } \ return(0); \ } static PLAN *palloc __P((enum ntype, int (*)())); /* * find_parsenum -- * Parse a string of the form [+-]# and return the value. */ long find_parsenum(plan, option, str, endch) PLAN *plan; char *option, *str, *endch; { long value; char *endchar; /* pointer to character ending conversion */ /* determine comparison from leading + or - */ switch(*str) { case '+': ++str; plan->flags = FIND_GREATER; break; case '-': ++str; plan->flags = FIND_LESSTHAN; break; default: plan->flags = FIND_EQUAL; break; } /* * convert the string with strtol(). Note, if strtol() returns zero * and endchar points to the beginning of the string we know we have * a syntax error. */ value = strtol(str, &endchar, 10); if (!value && endchar == str || endchar[0] && (!endch || endchar[0] != *endch)) err("%s: %s", option, "illegal numeric value"); if (endch) *endch = endchar[0]; return(value); } /* * -atime n functions -- * * True if the difference between the file access time and the * current time is n 24 hour periods. * */ f_atime(plan, entry) PLAN *plan; FTSENT *entry; { extern time_t now; COMPARE((now - entry->fts_statb.st_atime + SECSPERDAY - 1) / SECSPERDAY, plan->t_data); } PLAN * c_atime(arg) char *arg; { PLAN *new; ftsoptions &= ~FTS_NOSTAT; new = palloc(N_ATIME, f_atime); new->t_data = find_parsenum(new, "-atime", arg, NULL); return(new); } /* * -ctime n functions -- * * True if the difference between the last change of file * status information and the current time is n 24 hour periods. */ f_ctime(plan, entry) PLAN *plan; FTSENT *entry; { extern time_t now; COMPARE((now - entry->fts_statb.st_ctime + SECSPERDAY - 1) / SECSPERDAY, plan->t_data); } PLAN * c_ctime(arg) char *arg; { PLAN *new; ftsoptions &= ~FTS_NOSTAT; new = palloc(N_CTIME, f_ctime); new->t_data = find_parsenum(new, "-ctime", arg, (char *)NULL); return(new); } /* * -depth functions -- * * Always true, causes descent of the directory hierarchy to be done * so that all entries in a directory are acted on before the directory * itself. */ /* ARGSUSED */ f_always_true(plan, entry) PLAN *plan; FTSENT *entry; { return(1); } PLAN * c_depth() { isdepth = 1; return(palloc(N_DEPTH, f_always_true)); } /* * [-exec | -ok] utility [arg ... ] ; functions -- * * True if the executed utility returns a zero value as exit status. * The end of the primary expression is delimited by a semicolon. If * "{}" occurs anywhere, it gets replaced by the current pathname. * The current directory for the execution of utility is the same as * the current directory when the find utility was started. * * The primary -ok is different in that it requests affirmation of the * user before executing the utility. */ f_exec(plan, entry) register PLAN *plan; FTSENT *entry; { extern int dotfd; register int cnt; pid_t pid; int status; for (cnt = 0; plan->e_argv[cnt]; ++cnt) if (plan->e_len[cnt]) brace_subst(plan->e_orig[cnt], &plan->e_argv[cnt], entry->fts_path, plan->e_len[cnt]); if (plan->flags && !queryuser(plan->e_argv)) return(0); switch(pid = vfork()) { case -1: err("fork: %s", strerror(errno)); /* NOTREACHED */ case 0: if (fchdir(dotfd)) { (void)fprintf(stderr, "find: chdir: %s\n", strerror(errno)); _exit(1); } execvp(plan->e_argv[0], plan->e_argv); (void)fprintf(stderr, "find: %s: %s\n", plan->e_argv[0], strerror(errno)); _exit(1); } pid = waitpid(pid, &status, 0); return(pid != -1 && WIFEXITED(status) && !WEXITSTATUS(status)); } /* * c_exec -- * build three parallel arrays, one with pointers to the strings passed * on the command line, one with (possibly duplicated) pointers to the * argv array, and one with integer values that are lengths of the * strings, but also flags meaning that the string has to be massaged. */ PLAN * c_exec(argvp, isok) char ***argvp; int isok; { PLAN *new; /* node returned */ register int cnt; register char **argv, **ap, *p; isoutput = 1; new = palloc(N_EXEC, f_exec); new->flags = isok; for (ap = argv = *argvp;; ++ap) { if (!*ap) err("%s: %s", isok ? "-ok" : "-exec", "no terminating \";\""); if (**ap == ';') break; } cnt = ap - *argvp + 1; new->e_argv = (char **)emalloc((u_int)cnt * sizeof(char *)); new->e_orig = (char **)emalloc((u_int)cnt * sizeof(char *)); new->e_len = (int *)emalloc((u_int)cnt * sizeof(int)); for (argv = *argvp, cnt = 0; argv < ap; ++argv, ++cnt) { new->e_orig[cnt] = *argv; for (p = *argv; *p; ++p) if (p[0] == '{' && p[1] == '}') { new->e_argv[cnt] = emalloc((u_int)MAXPATHLEN); new->e_len[cnt] = MAXPATHLEN; break; } if (!*p) { new->e_argv[cnt] = *argv; new->e_len[cnt] = 0; } } new->e_argv[cnt] = new->e_orig[cnt] = NULL; *argvp = argv + 1; return(new); } /* * -follow functions -- * * Always true, causes symbolic links to be followed on a global * basis. */ PLAN * c_follow() { ftsoptions &= ~FTS_PHYSICAL; ftsoptions |= FTS_LOGICAL; return(palloc(N_FOLLOW, f_always_true)); } /* * -fstype functions -- * * True if the file is of a certain type. */ f_fstype(plan, entry) PLAN *plan; FTSENT *entry; { static dev_t curdev; /* need a guaranteed illegal dev value */ static int first = 1; static struct statfs sb; char *p, save[2]; /* only check when we cross mount point */ if (first || curdev != entry->fts_statb.st_dev) { curdev = entry->fts_statb.st_dev; /* * Statfs follows symlinks; find wants the link's file system, * not where it points. */ if (entry->fts_info == FTS_SL || entry->fts_info == FTS_SLNONE) { if (p = rindex(entry->fts_accpath, '/')) ++p; else p = entry->fts_accpath; save[0] = p[0]; p[0] = '.'; save[1] = p[1]; p[1] = '\0'; } else p = NULL; if (statfs(entry->fts_accpath, &sb)) err("%s: %s", entry->fts_accpath, strerror(errno)); if (p) { p[0] = save[0]; p[1] = save[1]; } first = 0; } return(plan->flags == MOUNT_NONE ? sb.f_flags & plan->m_flags : sb.f_type == plan->flags); } PLAN * c_fstype(arg) char *arg; { register PLAN *new; ftsoptions &= ~FTS_NOSTAT; new = palloc(N_FSTYPE, f_fstype); switch(*arg) { case 'f': if (!strcmp(arg, "fdesc")) { #ifdef MOUNT_FDESC new->flags = MOUNT_FDESC; return(new); #else err("unknown file type %s", arg); #endif } break; case 'i': if (!strcmp(arg, "isofs")) { new->flags = MOUNT_ISOFS; return(new); } break; case 'k': if (!strcmp(arg, "kernfs")) { #ifdef MOUNT_KERNFS new->flags = MOUNT_KERNFS; return(new); #else err("unknown file type %s", arg); #endif } break; case 'l': if (!strcmp(arg, "local")) { new->flags = MOUNT_NONE; new->m_flags = MNT_LOCAL; return(new); } break; case 'm': if (!strcmp(arg, "mfs")) { new->flags = MOUNT_MFS; return(new); } if (!strcmp(arg, "msdos")) { new->flags = MOUNT_MSDOS; return(new); } break; case 'n': if (!strcmp(arg, "nfs")) { new->flags = MOUNT_NFS; return(new); } break; case 'r': if (!strcmp(arg, "rdonly")) { new->flags = MOUNT_NONE; new->m_flags = MNT_RDONLY; return(new); } break; case 'u': if (!strcmp(arg, "ufs")) { new->flags = MOUNT_UFS; return(new); } break; } err("unknown file type %s", arg); /* NOTREACHED */ } /* * -group gname functions -- * * True if the file belongs to the group gname. If gname is numeric and * an equivalent of the getgrnam() function does not return a valid group * name, gname is taken as a group ID. */ f_group(plan, entry) PLAN *plan; FTSENT *entry; { return(entry->fts_statb.st_gid == plan->g_data); } PLAN * c_group(gname) char *gname; { PLAN *new; struct group *g; gid_t gid; ftsoptions &= ~FTS_NOSTAT; g = getgrnam(gname); if (g == NULL) { gid = atoi(gname); if (gid == 0 && gname[0] != '0') err("%s: %s", "-group", "no such group"); } else gid = g->gr_gid; new = palloc(N_GROUP, f_group); new->g_data = gid; return(new); } /* * -inum n functions -- * * True if the file has inode # n. */ f_inum(plan, entry) PLAN *plan; FTSENT *entry; { COMPARE(entry->fts_statb.st_ino, plan->i_data); } PLAN * c_inum(arg) char *arg; { PLAN *new; ftsoptions &= ~FTS_NOSTAT; new = palloc(N_INUM, f_inum); new->i_data = find_parsenum(new, "-inum", arg, (char *)NULL); return(new); } /* * -links n functions -- * * True if the file has n links. */ f_links(plan, entry) PLAN *plan; FTSENT *entry; { COMPARE(entry->fts_statb.st_nlink, plan->l_data); } PLAN * c_links(arg) char *arg; { PLAN *new; ftsoptions &= ~FTS_NOSTAT; new = palloc(N_LINKS, f_links); new->l_data = (nlink_t)find_parsenum(new, "-links", arg, (char *)NULL); return(new); } /* * -ls functions -- * * Always true - prints the current entry to stdout in "ls" format. */ /* ARGSUSED */ f_ls(plan, entry) PLAN *plan; FTSENT *entry; { printlong(entry->fts_path, entry->fts_accpath, &entry->fts_statb); return(1); } PLAN * c_ls() { ftsoptions &= ~FTS_NOSTAT; isoutput = 1; return(palloc(N_LS, f_ls)); } /* * -name functions -- * * True if the basename of the filename being examined * matches pattern using Pattern Matching Notation S3.14 */ f_name(plan, entry) PLAN *plan; FTSENT *entry; { return(!fnmatch(plan->c_data, entry->fts_name, FNM_QUOTE)); } PLAN * c_name(pattern) char *pattern; { PLAN *new; new = palloc(N_NAME, f_name); new->c_data = pattern; return(new); } /* * -newer file functions -- * * True if the current file has been modified more recently * then the modification time of the file named by the pathname * file. */ f_newer(plan, entry) PLAN *plan; FTSENT *entry; { return(entry->fts_statb.st_mtime > plan->t_data); } PLAN * c_newer(filename) char *filename; { PLAN *new; struct stat sb; ftsoptions &= ~FTS_NOSTAT; if (stat(filename, &sb)) err("%s: %s", filename, strerror(errno)); new = palloc(N_NEWER, f_newer); new->t_data = sb.st_mtime; return(new); } /* * -nogroup functions -- * * True if file belongs to a user ID for which the equivalent * of the getgrnam() 9.2.1 [POSIX.1] function returns NULL. */ /* ARGSUSED */ f_nogroup(plan, entry) PLAN *plan; FTSENT *entry; { char *group_from_gid(); return(group_from_gid(entry->fts_statb.st_gid, 1) ? 1 : 0); } PLAN * c_nogroup() { ftsoptions &= ~FTS_NOSTAT; return(palloc(N_NOGROUP, f_nogroup)); } /* * -nouser functions -- * * True if file belongs to a user ID for which the equivalent * of the getpwuid() 9.2.2 [POSIX.1] function returns NULL. */ /* ARGSUSED */ f_nouser(plan, entry) PLAN *plan; FTSENT *entry; { char *user_from_uid(); return(user_from_uid(entry->fts_statb.st_uid, 1) ? 1 : 0); } PLAN * c_nouser() { ftsoptions &= ~FTS_NOSTAT; return(palloc(N_NOUSER, f_nouser)); } /* * -perm functions -- * * The mode argument is used to represent file mode bits. If it starts * with a leading digit, it's treated as an octal mode, otherwise as a * symbolic mode. */ f_perm(plan, entry) PLAN *plan; FTSENT *entry; { mode_t mode; mode = entry->fts_statb.st_mode & (S_ISUID|S_ISGID|S_ISTXT|S_IRWXU|S_IRWXG|S_IRWXO); if (plan->flags) return((plan->m_data | mode) == mode); else return(mode == plan->m_data); /* NOTREACHED */ } PLAN * c_perm(perm) char *perm; { PLAN *new; mode_t *set; ftsoptions &= ~FTS_NOSTAT; new = palloc(N_PERM, f_perm); if (*perm == '-') { new->flags = 1; ++perm; } if ((set = setmode(perm)) == NULL) err("%s: %s", "-perm", "illegal mode string"); new->m_data = getmode(set, 0); return(new); } /* * -print functions -- * * Always true, causes the current pathame to be written to * standard output. */ /* ARGSUSED */ f_print(plan, entry) PLAN *plan; FTSENT *entry; { (void)printf("%s\n", entry->fts_path); return(1); } PLAN * c_print() { isoutput = 1; return(palloc(N_PRINT, f_print)); } /* * -prune functions -- * * Prune a portion of the hierarchy. */ /* ARGSUSED */ f_prune(plan, entry) PLAN *plan; FTSENT *entry; { extern FTS *tree; if (fts_set(tree, entry, FTS_SKIP)) err("%s: %s", entry->fts_path, strerror(errno)); return(1); } PLAN * c_prune() { return(palloc(N_PRUNE, f_prune)); } /* * -size n[c] functions -- * * True if the file size in bytes, divided by an implementation defined * value and rounded up to the next integer, is n. If n is followed by * a c, the size is in bytes. */ #define FIND_SIZE 512 static int divsize = 1; f_size(plan, entry) PLAN *plan; FTSENT *entry; { off_t size; size = divsize ? (entry->fts_statb.st_size + FIND_SIZE - 1) / FIND_SIZE : entry->fts_statb.st_size; COMPARE(size, plan->o_data); } PLAN * c_size(arg) char *arg; { PLAN *new; char endch; ftsoptions &= ~FTS_NOSTAT; new = palloc(N_SIZE, f_size); new->o_data = find_parsenum(new, "-size", arg, &endch); if (endch == 'c') divsize = 0; return(new); } /* * -type c functions -- * * True if the type of the file is c, where c is b, c, d, p, or f for * block special file, character special file, directory, FIFO, or * regular file, respectively. */ f_type(plan, entry) PLAN *plan; FTSENT *entry; { return((entry->fts_statb.st_mode & S_IFMT) == plan->m_data); } PLAN * c_type(typestring) char *typestring; { PLAN *new; mode_t mask; ftsoptions &= ~FTS_NOSTAT; switch (typestring[0]) { case 'b': mask = S_IFBLK; break; case 'c': mask = S_IFCHR; break; case 'd': mask = S_IFDIR; break; case 'f': mask = S_IFREG; break; case 'l': mask = S_IFLNK; break; case 'p': mask = S_IFIFO; break; case 's': mask = S_IFSOCK; break; default: err("%s: %s", "-type", "unknown type"); } new = palloc(N_TYPE, f_type); new->m_data = mask; return(new); } /* * -user uname functions -- * * True if the file belongs to the user uname. If uname is numeric and * an equivalent of the getpwnam() S9.2.2 [POSIX.1] function does not * return a valid user name, uname is taken as a user ID. */ f_user(plan, entry) PLAN *plan; FTSENT *entry; { return(entry->fts_statb.st_uid == plan->u_data); } PLAN * c_user(username) char *username; { PLAN *new; struct passwd *p; uid_t uid; ftsoptions &= ~FTS_NOSTAT; p = getpwnam(username); if (p == NULL) { uid = atoi(username); if (uid == 0 && username[0] != '0') err("%s: %s", "-user", "no such user"); } else uid = p->pw_uid; new = palloc(N_USER, f_user); new->u_data = uid; return(new); } /* * -xdev functions -- * * Always true, causes find not to decend past directories that have a * different device ID (st_dev, see stat() S5.6.2 [POSIX.1]) */ PLAN * c_xdev() { ftsoptions |= FTS_XDEV; return(palloc(N_XDEV, f_always_true)); } /* * ( expression ) functions -- * * True if expression is true. */ f_expr(plan, entry) PLAN *plan; FTSENT *entry; { register PLAN *p; register int state; for (p = plan->p_data[0]; p && (state = (p->eval)(p, entry)); p = p->next); return(state); } /* * N_OPENPAREN and N_CLOSEPAREN nodes are temporary place markers. They are * eliminated during phase 2 of find_formplan() --- the '(' node is converted * to a N_EXPR node containing the expression and the ')' node is discarded. */ PLAN * c_openparen() { return(palloc(N_OPENPAREN, (int (*)())-1)); } PLAN * c_closeparen() { return(palloc(N_CLOSEPAREN, (int (*)())-1)); } /* * -mtime n functions -- * * True if the difference between the file modification time and the * current time is n 24 hour periods. */ f_mtime(plan, entry) PLAN *plan; FTSENT *entry; { extern time_t now; COMPARE((now - entry->fts_statb.st_mtime + SECSPERDAY - 1) / SECSPERDAY, plan->t_data); } PLAN * c_mtime(arg) char *arg; { PLAN *new; ftsoptions &= ~FTS_NOSTAT; new = palloc(N_MTIME, f_mtime); new->t_data = find_parsenum(new, "-mtime", arg, (char *)NULL); return(new); } /* * ! expression functions -- * * Negation of a primary; the unary NOT operator. */ f_not(plan, entry) PLAN *plan; FTSENT *entry; { register PLAN *p; register int state; for (p = plan->p_data[0]; p && (state = (p->eval)(p, entry)); p = p->next); return(!state); } PLAN * c_not() { return(palloc(N_NOT, f_not)); } /* * expression -o expression functions -- * * Alternation of primaries; the OR operator. The second expression is * not evaluated if the first expression is true. */ f_or(plan, entry) PLAN *plan; FTSENT *entry; { register PLAN *p; register int state; for (p = plan->p_data[0]; p && (state = (p->eval)(p, entry)); p = p->next); if (state) return(1); for (p = plan->p_data[1]; p && (state = (p->eval)(p, entry)); p = p->next); return(state); } PLAN * c_or() { return(palloc(N_OR, f_or)); } static PLAN * palloc(t, f) enum ntype t; int (*f)(); { PLAN *new; if (new = malloc(sizeof(PLAN))) { new->type = t; new->eval = f; new->flags = 0; new->next = NULL; return(new); } err("%s", strerror(errno)); /* NOTREACHED */ }