/*- * Copyright (c) 1990, 1993 * 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. * 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 const char sccsid[] = "@(#)function.c 8.10 (Berkeley) 5/4/95"; #endif #endif /* not lint */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "find.h" static PLAN *palloc(OPTION *); static long long find_parsenum(PLAN *, const char *, char *, char *); static long long find_parsetime(PLAN *, const char *, char *); static char *nextarg(OPTION *, char ***); extern char **environ; static PLAN *lastexecplus = NULL; #define COMPARE(a, b) do { \ switch (plan->flags & F_ELG_MASK) { \ case F_EQUAL: \ return (a == b); \ case F_LESSTHAN: \ return (a < b); \ case F_GREATER: \ return (a > b); \ default: \ abort(); \ } \ } while(0) static PLAN * palloc(OPTION *option) { PLAN *new; if ((new = malloc(sizeof(PLAN))) == NULL) err(1, NULL); new->execute = option->execute; new->flags = option->flags; new->next = NULL; return new; } /* * find_parsenum -- * Parse a string of the form [+-]# and return the value. */ static long long find_parsenum(PLAN *plan, const char *option, char *vp, char *endch) { long long value; char *endchar, *str; /* Pointer to character ending conversion. */ /* Determine comparison from leading + or -. */ str = vp; switch (*str) { case '+': ++str; plan->flags |= F_GREATER; break; case '-': ++str; plan->flags |= F_LESSTHAN; break; default: plan->flags |= F_EQUAL; break; } /* * Convert the string with strtoq(). Note, if strtoq() returns zero * and endchar points to the beginning of the string we know we have * a syntax error. */ value = strtoq(str, &endchar, 10); if (value == 0 && endchar == str) errx(1, "%s: %s: illegal numeric value", option, vp); if (endchar[0] && endch == NULL) errx(1, "%s: %s: illegal trailing character", option, vp); if (endch) *endch = endchar[0]; return value; } /* * find_parsetime -- * Parse a string of the form [+-]([0-9]+[smhdw]?)+ and return the value. */ static long long find_parsetime(PLAN *plan, const char *option, char *vp) { long long secs, value; char *str, *unit; /* Pointer to character ending conversion. */ /* Determine comparison from leading + or -. */ str = vp; switch (*str) { case '+': ++str; plan->flags |= F_GREATER; break; case '-': ++str; plan->flags |= F_LESSTHAN; break; default: plan->flags |= F_EQUAL; break; } value = strtoq(str, &unit, 10); if (value == 0 && unit == str) { errx(1, "%s: %s: illegal time value", option, vp); /* NOTREACHED */ } if (*unit == '\0') return value; /* Units syntax. */ secs = 0; for (;;) { switch(*unit) { case 's': /* seconds */ secs += value; break; case 'm': /* minutes */ secs += value * 60; break; case 'h': /* hours */ secs += value * 3600; break; case 'd': /* days */ secs += value * 86400; break; case 'w': /* weeks */ secs += value * 604800; break; default: errx(1, "%s: %s: bad unit '%c'", option, vp, *unit); /* NOTREACHED */ } str = unit + 1; if (*str == '\0') /* EOS */ break; value = strtoq(str, &unit, 10); if (value == 0 && unit == str) { errx(1, "%s: %s: illegal time value", option, vp); /* NOTREACHED */ } if (*unit == '\0') { errx(1, "%s: %s: missing trailing unit", option, vp); /* NOTREACHED */ } } plan->flags |= F_EXACTTIME; return secs; } /* * nextarg -- * Check that another argument still exists, return a pointer to it, * and increment the argument vector pointer. */ static char * nextarg(OPTION *option, char ***argvp) { char *arg; if ((arg = **argvp) == 0) errx(1, "%s: requires additional arguments", option->name); (*argvp)++; return arg; } /* nextarg() */ /* * The value of n for the inode times (atime, birthtime, ctime, mtime) is a * range, i.e. n matches from (n - 1) to n 24 hour periods. This interacts * with -n, such that "-mtime -1" would be less than 0 days, which isn't what * the user wanted. Correct so that -1 is "less than 1". */ #define TIME_CORRECT(p) \ if (((p)->flags & F_ELG_MASK) == F_LESSTHAN) \ ++((p)->t_data.tv_sec); /* * -[acm]min n functions -- * * True if the difference between the * file access time (-amin) * file birth time (-Bmin) * last change of file status information (-cmin) * file modification time (-mmin) * and the current time is n min periods. */ int f_Xmin(PLAN *plan, FTSENT *entry) { if (plan->flags & F_TIME_C) { COMPARE((now - entry->fts_statp->st_ctime + 60 - 1) / 60, plan->t_data.tv_sec); } else if (plan->flags & F_TIME_A) { COMPARE((now - entry->fts_statp->st_atime + 60 - 1) / 60, plan->t_data.tv_sec); } else if (plan->flags & F_TIME_B) { COMPARE((now - entry->fts_statp->st_birthtime + 60 - 1) / 60, plan->t_data.tv_sec); } else { COMPARE((now - entry->fts_statp->st_mtime + 60 - 1) / 60, plan->t_data.tv_sec); } } PLAN * c_Xmin(OPTION *option, char ***argvp) { char *nmins; PLAN *new; nmins = nextarg(option, argvp); ftsoptions &= ~FTS_NOSTAT; new = palloc(option); new->t_data.tv_sec = find_parsenum(new, option->name, nmins, NULL); new->t_data.tv_nsec = 0; TIME_CORRECT(new); return new; } /* * -[acm]time n functions -- * * True if the difference between the * file access time (-atime) * file birth time (-Btime) * last change of file status information (-ctime) * file modification time (-mtime) * and the current time is n 24 hour periods. */ int f_Xtime(PLAN *plan, FTSENT *entry) { time_t xtime; if (plan->flags & F_TIME_A) xtime = entry->fts_statp->st_atime; else if (plan->flags & F_TIME_B) xtime = entry->fts_statp->st_birthtime; else if (plan->flags & F_TIME_C) xtime = entry->fts_statp->st_ctime; else xtime = entry->fts_statp->st_mtime; if (plan->flags & F_EXACTTIME) COMPARE(now - xtime, plan->t_data.tv_sec); else COMPARE((now - xtime + 86400 - 1) / 86400, plan->t_data.tv_sec); } PLAN * c_Xtime(OPTION *option, char ***argvp) { char *value; PLAN *new; value = nextarg(option, argvp); ftsoptions &= ~FTS_NOSTAT; new = palloc(option); new->t_data.tv_sec = find_parsetime(new, option->name, value); new->t_data.tv_nsec = 0; if (!(new->flags & F_EXACTTIME)) TIME_CORRECT(new); return new; } /* * -maxdepth/-mindepth n functions -- * * Does the same as -prune if the level of the current file is * greater/less than the specified maximum/minimum depth. * * Note that -maxdepth and -mindepth are handled specially in * find_execute() so their f_* functions are set to f_always_true(). */ PLAN * c_mXXdepth(OPTION *option, char ***argvp) { char *dstr; PLAN *new; dstr = nextarg(option, argvp); if (dstr[0] == '-') /* all other errors handled by find_parsenum() */ errx(1, "%s: %s: value must be positive", option->name, dstr); new = palloc(option); if (option->flags & F_MAXDEPTH) maxdepth = find_parsenum(new, option->name, dstr, NULL); else mindepth = find_parsenum(new, option->name, dstr, NULL); return new; } /* * -acl function -- * * Show files with EXTENDED ACL attributes. */ int f_acl(PLAN *plan __unused, FTSENT *entry) { acl_t facl; acl_type_t acl_type; int acl_supported = 0, ret, trivial; if (S_ISLNK(entry->fts_statp->st_mode)) return 0; ret = pathconf(entry->fts_accpath, _PC_ACL_NFS4); if (ret > 0) { acl_supported = 1; acl_type = ACL_TYPE_NFS4; } else if (ret < 0 && errno != EINVAL) { warn("%s", entry->fts_accpath); return (0); } if (acl_supported == 0) { ret = pathconf(entry->fts_accpath, _PC_ACL_EXTENDED); if (ret > 0) { acl_supported = 1; acl_type = ACL_TYPE_ACCESS; } else if (ret < 0 && errno != EINVAL) { warn("%s", entry->fts_accpath); return (0); } } if (acl_supported == 0) return (0); facl = acl_get_file(entry->fts_accpath, acl_type); if (facl == NULL) { warn("%s", entry->fts_accpath); return (0); } ret = acl_is_trivial_np(facl, &trivial); acl_free(facl); if (ret) { warn("%s", entry->fts_accpath); return (0); } if (trivial) return (0); return (1); } PLAN * c_acl(OPTION *option, char ***argvp __unused) { ftsoptions &= ~FTS_NOSTAT; return (palloc(option)); } /* * -delete functions -- * * True always. Makes its best shot and continues on regardless. */ int f_delete(PLAN *plan __unused, FTSENT *entry) { /* ignore these from fts */ if (strcmp(entry->fts_accpath, ".") == 0 || strcmp(entry->fts_accpath, "..") == 0) return 1; /* sanity check */ if (isdepth == 0 || /* depth off */ (ftsoptions & FTS_NOSTAT)) /* not stat()ing */ errx(1, "-delete: insecure options got turned on"); if (!(ftsoptions & FTS_PHYSICAL) || /* physical off */ (ftsoptions & FTS_LOGICAL)) /* or finally, logical on */ errx(1, "-delete: forbidden when symlinks are followed"); /* Potentially unsafe - do not accept relative paths whatsoever */ if (entry->fts_level > FTS_ROOTLEVEL && strchr(entry->fts_accpath, '/') != NULL) errx(1, "-delete: %s: relative path potentially not safe", entry->fts_accpath); /* Turn off user immutable bits if running as root */ if ((entry->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) && !(entry->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)) && geteuid() == 0) lchflags(entry->fts_accpath, entry->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)); /* rmdir directories, unlink everything else */ if (S_ISDIR(entry->fts_statp->st_mode)) { if (rmdir(entry->fts_accpath) < 0 && errno != ENOTEMPTY) warn("-delete: rmdir(%s)", entry->fts_path); } else { if (unlink(entry->fts_accpath) < 0) warn("-delete: unlink(%s)", entry->fts_path); } /* "succeed" */ return 1; } PLAN * c_delete(OPTION *option, char ***argvp __unused) { ftsoptions &= ~FTS_NOSTAT; /* no optimise */ isoutput = 1; /* possible output */ isdepth = 1; /* -depth implied */ /* * Try to avoid the confusing error message about relative paths * being potentially not safe. */ if (ftsoptions & FTS_NOCHDIR) errx(1, "%s: forbidden when the current directory cannot be opened", "-delete"); return palloc(option); } /* * always_true -- * * Always true, used for -maxdepth, -mindepth, -xdev, -follow, and -true */ int f_always_true(PLAN *plan __unused, FTSENT *entry __unused) { return 1; } /* * -depth functions -- * * With argument: True if the file is at level n. * Without argument: 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. */ int f_depth(PLAN *plan, FTSENT *entry) { if (plan->flags & F_DEPTH) COMPARE(entry->fts_level, plan->d_data); else return 1; } PLAN * c_depth(OPTION *option, char ***argvp) { PLAN *new; char *str; new = palloc(option); str = **argvp; if (str && !(new->flags & F_DEPTH)) { /* skip leading + or - */ if (*str == '+' || *str == '-') str++; /* skip sign */ if (*str == '+' || *str == '-') str++; if (isdigit(*str)) new->flags |= F_DEPTH; } if (new->flags & F_DEPTH) { /* -depth n */ char *ndepth; ndepth = nextarg(option, argvp); new->d_data = find_parsenum(new, option->name, ndepth, NULL); } else { /* -d */ isdepth = 1; } return new; } /* * -empty functions -- * * True if the file or directory is empty */ int f_empty(PLAN *plan __unused, FTSENT *entry) { if (S_ISREG(entry->fts_statp->st_mode) && entry->fts_statp->st_size == 0) return 1; if (S_ISDIR(entry->fts_statp->st_mode)) { struct dirent *dp; int empty; DIR *dir; empty = 1; dir = opendir(entry->fts_accpath); if (dir == NULL) return 0; for (dp = readdir(dir); dp; dp = readdir(dir)) if (dp->d_name[0] != '.' || (dp->d_name[1] != '\0' && (dp->d_name[1] != '.' || dp->d_name[2] != '\0'))) { empty = 0; break; } closedir(dir); return empty; } return 0; } PLAN * c_empty(OPTION *option, char ***argvp __unused) { ftsoptions &= ~FTS_NOSTAT; return palloc(option); } /* * [-exec | -execdir | -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, * or, in the case of -execdir, the current basename (filename * without leading directory prefix). For -exec and -ok, * the current directory for the execution of utility is the same as * the current directory when the find utility was started, whereas * for -execdir, it is the directory the file resides in. * * The primary -ok differs from -exec in that it requests affirmation * of the user before executing the utility. */ int f_exec(PLAN *plan, FTSENT *entry) { int cnt; pid_t pid; int status; char *file; if (entry == NULL && plan->flags & F_EXECPLUS) { if (plan->e_ppos == plan->e_pbnum) return (1); plan->e_argv[plan->e_ppos] = NULL; goto doexec; } /* XXX - if file/dir ends in '/' this will not work -- can it? */ if ((plan->flags & F_EXECDIR) && \ (file = strrchr(entry->fts_path, '/'))) file++; else file = entry->fts_path; if (plan->flags & F_EXECPLUS) { if ((plan->e_argv[plan->e_ppos] = strdup(file)) == NULL) err(1, NULL); plan->e_len[plan->e_ppos] = strlen(file); plan->e_psize += plan->e_len[plan->e_ppos]; if (++plan->e_ppos < plan->e_pnummax && plan->e_psize < plan->e_psizemax) return (1); plan->e_argv[plan->e_ppos] = NULL; } else { for (cnt = 0; plan->e_argv[cnt]; ++cnt) if (plan->e_len[cnt]) brace_subst(plan->e_orig[cnt], &plan->e_argv[cnt], file, plan->e_len[cnt]); } doexec: if ((plan->flags & F_NEEDOK) && !queryuser(plan->e_argv)) return 0; /* make sure find output is interspersed correctly with subprocesses */ fflush(stdout); fflush(stderr); switch (pid = fork()) { case -1: err(1, "fork"); /* NOTREACHED */ case 0: /* change dir back from where we started */ if (!(plan->flags & F_EXECDIR) && !(ftsoptions & FTS_NOCHDIR) && fchdir(dotfd)) { warn("chdir"); _exit(1); } execvp(plan->e_argv[0], plan->e_argv); warn("%s", plan->e_argv[0]); _exit(1); } if (plan->flags & F_EXECPLUS) { while (--plan->e_ppos >= plan->e_pbnum) free(plan->e_argv[plan->e_ppos]); plan->e_ppos = plan->e_pbnum; plan->e_psize = plan->e_pbsize; } pid = waitpid(pid, &status, 0); return (pid != -1 && WIFEXITED(status) && !WEXITSTATUS(status)); } /* * c_exec, c_execdir, c_ok -- * 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(OPTION *option, char ***argvp) { PLAN *new; /* node returned */ long argmax; int cnt, i; char **argv, **ap, **ep, *p; /* This would defeat -execdir's intended security. */ if (option->flags & F_EXECDIR && ftsoptions & FTS_NOCHDIR) errx(1, "%s: forbidden when the current directory cannot be opened", "-execdir"); /* XXX - was in c_execdir, but seems unnecessary!? ftsoptions &= ~FTS_NOSTAT; */ isoutput = 1; /* XXX - this is a change from the previous coding */ new = palloc(option); for (ap = argv = *argvp;; ++ap) { if (!*ap) errx(1, "%s: no terminating \";\" or \"+\"", option->name); if (**ap == ';') break; if (**ap == '+' && ap != argv && strcmp(*(ap - 1), "{}") == 0) { new->flags |= F_EXECPLUS; break; } } if (ap == argv) errx(1, "%s: no command specified", option->name); cnt = ap - *argvp + 1; if (new->flags & F_EXECPLUS) { new->e_ppos = new->e_pbnum = cnt - 2; if ((argmax = sysconf(_SC_ARG_MAX)) == -1) { warn("sysconf(_SC_ARG_MAX)"); argmax = _POSIX_ARG_MAX; } argmax -= 1024; for (ep = environ; *ep != NULL; ep++) argmax -= strlen(*ep) + 1 + sizeof(*ep); argmax -= 1 + sizeof(*ep); /* * Ensure that -execdir ... {} + does not mix files * from different directories in one invocation. * Files from the same directory should be handled * in one invocation but there is no code for it. */ new->e_pnummax = new->flags & F_EXECDIR ? 1 : argmax / 16; argmax -= sizeof(char *) * new->e_pnummax; if (argmax <= 0) errx(1, "no space for arguments"); new->e_psizemax = argmax; new->e_pbsize = 0; cnt += new->e_pnummax + 1; new->e_next = lastexecplus; lastexecplus = new; } if ((new->e_argv = malloc(cnt * sizeof(char *))) == NULL) err(1, NULL); if ((new->e_orig = malloc(cnt * sizeof(char *))) == NULL) err(1, NULL); if ((new->e_len = malloc(cnt * sizeof(int))) == NULL) err(1, NULL); for (argv = *argvp, cnt = 0; argv < ap; ++argv, ++cnt) { new->e_orig[cnt] = *argv; if (new->flags & F_EXECPLUS) new->e_pbsize += strlen(*argv) + 1; for (p = *argv; *p; ++p) if (!(new->flags & F_EXECPLUS) && p[0] == '{' && p[1] == '}') { if ((new->e_argv[cnt] = malloc(MAXPATHLEN)) == NULL) err(1, NULL); new->e_len[cnt] = MAXPATHLEN; break; } if (!*p) { new->e_argv[cnt] = *argv; new->e_len[cnt] = 0; } } if (new->flags & F_EXECPLUS) { new->e_psize = new->e_pbsize; cnt--; for (i = 0; i < new->e_pnummax; i++) { new->e_argv[cnt] = NULL; new->e_len[cnt] = 0; cnt++; } argv = ap; goto done; } new->e_argv[cnt] = new->e_orig[cnt] = NULL; done: *argvp = argv + 1; return new; } /* Finish any pending -exec ... {} + functions. */ void finish_execplus(void) { PLAN *p; p = lastexecplus; while (p != NULL) { (p->execute)(p, NULL); p = p->e_next; } } int f_flags(PLAN *plan, FTSENT *entry) { u_long flags; flags = entry->fts_statp->st_flags; if (plan->flags & F_ATLEAST) return (flags | plan->fl_flags) == flags && !(flags & plan->fl_notflags); else if (plan->flags & F_ANY) return (flags & plan->fl_flags) || (flags | plan->fl_notflags) != flags; else return flags == plan->fl_flags && !(plan->fl_flags & plan->fl_notflags); } PLAN * c_flags(OPTION *option, char ***argvp) { char *flags_str; PLAN *new; u_long flags, notflags; flags_str = nextarg(option, argvp); ftsoptions &= ~FTS_NOSTAT; new = palloc(option); if (*flags_str == '-') { new->flags |= F_ATLEAST; flags_str++; } else if (*flags_str == '+') { new->flags |= F_ANY; flags_str++; } if (strtofflags(&flags_str, &flags, ¬flags) == 1) errx(1, "%s: %s: illegal flags string", option->name, flags_str); new->fl_flags = flags; new->fl_notflags = notflags; return new; } /* * -follow functions -- * * Always true, causes symbolic links to be followed on a global * basis. */ PLAN * c_follow(OPTION *option, char ***argvp __unused) { ftsoptions &= ~FTS_PHYSICAL; ftsoptions |= FTS_LOGICAL; return palloc(option); } /* * -fstype functions -- * * True if the file is of a certain type. */ int f_fstype(PLAN *plan, FTSENT *entry) { static dev_t curdev; /* need a guaranteed illegal dev value */ static int first = 1; struct statfs sb; static int val_flags; static char fstype[sizeof(sb.f_fstypename)]; char *p, save[2] = {0,0}; if ((plan->flags & F_MTMASK) == F_MTUNKNOWN) return 0; /* Only check when we cross mount point. */ if (first || curdev != entry->fts_statp->st_dev) { curdev = entry->fts_statp->st_dev; /* * Statfs follows symlinks; find wants the link's filesystem, * not where it points. */ if (entry->fts_info == FTS_SL || entry->fts_info == FTS_SLNONE) { if ((p = strrchr(entry->fts_accpath, '/')) != NULL) ++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(1, "%s", entry->fts_accpath); if (p) { p[0] = save[0]; p[1] = save[1]; } first = 0; /* * Further tests may need both of these values, so * always copy both of them. */ val_flags = sb.f_flags; strlcpy(fstype, sb.f_fstypename, sizeof(fstype)); } switch (plan->flags & F_MTMASK) { case F_MTFLAG: return val_flags & plan->mt_data; case F_MTTYPE: return (strncmp(fstype, plan->c_data, sizeof(fstype)) == 0); default: abort(); } } PLAN * c_fstype(OPTION *option, char ***argvp) { char *fsname; PLAN *new; fsname = nextarg(option, argvp); ftsoptions &= ~FTS_NOSTAT; new = palloc(option); switch (*fsname) { case 'l': if (!strcmp(fsname, "local")) { new->flags |= F_MTFLAG; new->mt_data = MNT_LOCAL; return new; } break; case 'r': if (!strcmp(fsname, "rdonly")) { new->flags |= F_MTFLAG; new->mt_data = MNT_RDONLY; return new; } break; } new->flags |= F_MTTYPE; new->c_data = fsname; return new; } /* * -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. */ int f_group(PLAN *plan, FTSENT *entry) { COMPARE(entry->fts_statp->st_gid, plan->g_data); } PLAN * c_group(OPTION *option, char ***argvp) { char *gname; PLAN *new; struct group *g; gid_t gid; gname = nextarg(option, argvp); ftsoptions &= ~FTS_NOSTAT; new = palloc(option); g = getgrnam(gname); if (g == NULL) { char* cp = gname; if (gname[0] == '-' || gname[0] == '+') gname++; gid = atoi(gname); if (gid == 0 && gname[0] != '0') errx(1, "%s: %s: no such group", option->name, gname); gid = find_parsenum(new, option->name, cp, NULL); } else gid = g->gr_gid; new->g_data = gid; return new; } /* * -ignore_readdir_race functions -- * * Always true. Ignore errors which occur if a file or a directory * in a starting point gets deleted between reading the name and calling * stat on it while find is traversing the starting point. */ PLAN * c_ignore_readdir_race(OPTION *option, char ***argvp __unused) { if (strcmp(option->name, "-ignore_readdir_race") == 0) ignore_readdir_race = 1; else ignore_readdir_race = 0; return palloc(option); } /* * -inum n functions -- * * True if the file has inode # n. */ int f_inum(PLAN *plan, FTSENT *entry) { COMPARE(entry->fts_statp->st_ino, plan->i_data); } PLAN * c_inum(OPTION *option, char ***argvp) { char *inum_str; PLAN *new; inum_str = nextarg(option, argvp); ftsoptions &= ~FTS_NOSTAT; new = palloc(option); new->i_data = find_parsenum(new, option->name, inum_str, NULL); return new; } /* * -samefile FN * * True if the file has the same inode (eg hard link) FN */ /* f_samefile is just f_inum */ PLAN * c_samefile(OPTION *option, char ***argvp) { char *fn; PLAN *new; struct stat sb; fn = nextarg(option, argvp); ftsoptions &= ~FTS_NOSTAT; new = palloc(option); if (stat(fn, &sb)) err(1, "%s", fn); new->i_data = sb.st_ino; return new; } /* * -links n functions -- * * True if the file has n links. */ int f_links(PLAN *plan, FTSENT *entry) { COMPARE(entry->fts_statp->st_nlink, plan->l_data); } PLAN * c_links(OPTION *option, char ***argvp) { char *nlinks; PLAN *new; nlinks = nextarg(option, argvp); ftsoptions &= ~FTS_NOSTAT; new = palloc(option); new->l_data = (nlink_t)find_parsenum(new, option->name, nlinks, NULL); return new; } /* * -ls functions -- * * Always true - prints the current entry to stdout in "ls" format. */ int f_ls(PLAN *plan __unused, FTSENT *entry) { printlong(entry->fts_path, entry->fts_accpath, entry->fts_statp); return 1; } PLAN * c_ls(OPTION *option, char ***argvp __unused) { ftsoptions &= ~FTS_NOSTAT; isoutput = 1; return palloc(option); } /* * -name functions -- * * True if the basename of the filename being examined * matches pattern using Pattern Matching Notation S3.14 */ int f_name(PLAN *plan, FTSENT *entry) { char fn[PATH_MAX]; const char *name; ssize_t len; if (plan->flags & F_LINK) { /* * The below test both avoids obviously useless readlink() * calls and ensures that symlinks with existent target do * not match if symlinks are being followed. * Assumption: fts will stat all symlinks that are to be * followed and will return the stat information. */ if (entry->fts_info != FTS_NSOK && entry->fts_info != FTS_SL && entry->fts_info != FTS_SLNONE) return 0; len = readlink(entry->fts_accpath, fn, sizeof(fn) - 1); if (len == -1) return 0; fn[len] = '\0'; name = fn; } else name = entry->fts_name; return !fnmatch(plan->c_data, name, plan->flags & F_IGNCASE ? FNM_CASEFOLD : 0); } PLAN * c_name(OPTION *option, char ***argvp) { char *pattern; PLAN *new; pattern = nextarg(option, argvp); new = palloc(option); 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. */ int f_newer(PLAN *plan, FTSENT *entry) { struct timespec ft; if (plan->flags & F_TIME_C) ft = entry->fts_statp->st_ctim; else if (plan->flags & F_TIME_A) ft = entry->fts_statp->st_atim; else if (plan->flags & F_TIME_B) ft = entry->fts_statp->st_birthtim; else ft = entry->fts_statp->st_mtim; return (ft.tv_sec > plan->t_data.tv_sec || (ft.tv_sec == plan->t_data.tv_sec && ft.tv_nsec > plan->t_data.tv_nsec)); } PLAN * c_newer(OPTION *option, char ***argvp) { char *fn_or_tspec; PLAN *new; struct stat sb; fn_or_tspec = nextarg(option, argvp); ftsoptions &= ~FTS_NOSTAT; new = palloc(option); /* compare against what */ if (option->flags & F_TIME2_T) { new->t_data.tv_sec = get_date(fn_or_tspec); if (new->t_data.tv_sec == (time_t) -1) errx(1, "Can't parse date/time: %s", fn_or_tspec); /* Use the seconds only in the comparison. */ new->t_data.tv_nsec = 999999999; } else { if (stat(fn_or_tspec, &sb)) err(1, "%s", fn_or_tspec); if (option->flags & F_TIME2_C) new->t_data = sb.st_ctim; else if (option->flags & F_TIME2_A) new->t_data = sb.st_atim; else if (option->flags & F_TIME2_B) new->t_data = sb.st_birthtim; else new->t_data = sb.st_mtim; } 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. */ int f_nogroup(PLAN *plan __unused, FTSENT *entry) { return group_from_gid(entry->fts_statp->st_gid, 1) == NULL; } PLAN * c_nogroup(OPTION *option, char ***argvp __unused) { ftsoptions &= ~FTS_NOSTAT; return palloc(option); } /* * -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. */ int f_nouser(PLAN *plan __unused, FTSENT *entry) { return user_from_uid(entry->fts_statp->st_uid, 1) == NULL; } PLAN * c_nouser(OPTION *option, char ***argvp __unused) { ftsoptions &= ~FTS_NOSTAT; return palloc(option); } /* * -path functions -- * * True if the path of the filename being examined * matches pattern using Pattern Matching Notation S3.14 */ int f_path(PLAN *plan, FTSENT *entry) { return !fnmatch(plan->c_data, entry->fts_path, plan->flags & F_IGNCASE ? FNM_CASEFOLD : 0); } /* c_path is the same as c_name */ /* * -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. */ int f_perm(PLAN *plan, FTSENT *entry) { mode_t mode; mode = entry->fts_statp->st_mode & (S_ISUID|S_ISGID|S_ISTXT|S_IRWXU|S_IRWXG|S_IRWXO); if (plan->flags & F_ATLEAST) return (plan->m_data | mode) == mode; else if (plan->flags & F_ANY) return (mode & plan->m_data); else return mode == plan->m_data; /* NOTREACHED */ } PLAN * c_perm(OPTION *option, char ***argvp) { char *perm; PLAN *new; mode_t *set; perm = nextarg(option, argvp); ftsoptions &= ~FTS_NOSTAT; new = palloc(option); if (*perm == '-') { new->flags |= F_ATLEAST; ++perm; } else if (*perm == '+') { new->flags |= F_ANY; ++perm; } if ((set = setmode(perm)) == NULL) errx(1, "%s: %s: illegal mode string", option->name, perm); new->m_data = getmode(set, 0); free(set); return new; } /* * -print functions -- * * Always true, causes the current pathname to be written to * standard output. */ int f_print(PLAN *plan __unused, FTSENT *entry) { (void)puts(entry->fts_path); return 1; } PLAN * c_print(OPTION *option, char ***argvp __unused) { isoutput = 1; return palloc(option); } /* * -print0 functions -- * * Always true, causes the current pathname to be written to * standard output followed by a NUL character */ int f_print0(PLAN *plan __unused, FTSENT *entry) { fputs(entry->fts_path, stdout); fputc('\0', stdout); return 1; } /* c_print0 is the same as c_print */ /* * -prune functions -- * * Prune a portion of the hierarchy. */ int f_prune(PLAN *plan __unused, FTSENT *entry) { if (fts_set(tree, entry, FTS_SKIP)) err(1, "%s", entry->fts_path); return 1; } /* c_prune == c_simple */ /* * -regex functions -- * * True if the whole path of the file matches pattern using * regular expression. */ int f_regex(PLAN *plan, FTSENT *entry) { char *str; int len; regex_t *pre; regmatch_t pmatch; int errcode; char errbuf[LINE_MAX]; int matched; pre = plan->re_data; str = entry->fts_path; len = strlen(str); matched = 0; pmatch.rm_so = 0; pmatch.rm_eo = len; errcode = regexec(pre, str, 1, &pmatch, REG_STARTEND); if (errcode != 0 && errcode != REG_NOMATCH) { regerror(errcode, pre, errbuf, sizeof errbuf); errx(1, "%s: %s", plan->flags & F_IGNCASE ? "-iregex" : "-regex", errbuf); } if (errcode == 0 && pmatch.rm_so == 0 && pmatch.rm_eo == len) matched = 1; return matched; } PLAN * c_regex(OPTION *option, char ***argvp) { PLAN *new; char *pattern; regex_t *pre; int errcode; char errbuf[LINE_MAX]; if ((pre = malloc(sizeof(regex_t))) == NULL) err(1, NULL); pattern = nextarg(option, argvp); if ((errcode = regcomp(pre, pattern, regexp_flags | (option->flags & F_IGNCASE ? REG_ICASE : 0))) != 0) { regerror(errcode, pre, errbuf, sizeof errbuf); errx(1, "%s: %s: %s", option->flags & F_IGNCASE ? "-iregex" : "-regex", pattern, errbuf); } new = palloc(option); new->re_data = pre; return new; } /* c_simple covers c_prune, c_openparen, c_closeparen, c_not, c_or, c_true, c_false */ PLAN * c_simple(OPTION *option, char ***argvp __unused) { return palloc(option); } /* * -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 * one of c k M G T P, the size is in bytes, kilobytes, * megabytes, gigabytes, terabytes or petabytes respectively. */ #define FIND_SIZE 512 static int divsize = 1; int f_size(PLAN *plan, FTSENT *entry) { off_t size; size = divsize ? (entry->fts_statp->st_size + FIND_SIZE - 1) / FIND_SIZE : entry->fts_statp->st_size; COMPARE(size, plan->o_data); } PLAN * c_size(OPTION *option, char ***argvp) { char *size_str; PLAN *new; char endch; off_t scale; size_str = nextarg(option, argvp); ftsoptions &= ~FTS_NOSTAT; new = palloc(option); endch = 'c'; new->o_data = find_parsenum(new, option->name, size_str, &endch); if (endch != '\0') { divsize = 0; switch (endch) { case 'c': /* characters */ scale = 0x1LL; break; case 'k': /* kilobytes 1<<10 */ scale = 0x400LL; break; case 'M': /* megabytes 1<<20 */ scale = 0x100000LL; break; case 'G': /* gigabytes 1<<30 */ scale = 0x40000000LL; break; case 'T': /* terabytes 1<<40 */ scale = 0x10000000000LL; break; case 'P': /* petabytes 1<<50 */ scale = 0x4000000000000LL; break; default: errx(1, "%s: %s: illegal trailing character", option->name, size_str); break; } if (new->o_data > QUAD_MAX / scale) errx(1, "%s: %s: value too large", option->name, size_str); new->o_data *= scale; } return new; } /* * -sparse functions -- * * Check if a file is sparse by finding if it occupies fewer blocks * than we expect based on its size. */ int f_sparse(PLAN *plan __unused, FTSENT *entry) { off_t expected_blocks; expected_blocks = (entry->fts_statp->st_size + 511) / 512; return entry->fts_statp->st_blocks < expected_blocks; } PLAN * c_sparse(OPTION *option, char ***argvp __unused) { ftsoptions &= ~FTS_NOSTAT; return palloc(option); } /* * -type c functions -- * * True if the type of the file is c, where c is b, c, d, p, f or w * for block special file, character special file, directory, FIFO, * regular file or whiteout respectively. */ int f_type(PLAN *plan, FTSENT *entry) { return (entry->fts_statp->st_mode & S_IFMT) == plan->m_data; } PLAN * c_type(OPTION *option, char ***argvp) { char *typestring; PLAN *new; mode_t mask; typestring = nextarg(option, argvp); 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; #ifdef FTS_WHITEOUT case 'w': mask = S_IFWHT; ftsoptions |= FTS_WHITEOUT; break; #endif /* FTS_WHITEOUT */ default: errx(1, "%s: %s: unknown type", option->name, typestring); } new = palloc(option); 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. */ int f_user(PLAN *plan, FTSENT *entry) { COMPARE(entry->fts_statp->st_uid, plan->u_data); } PLAN * c_user(OPTION *option, char ***argvp) { char *username; PLAN *new; struct passwd *p; uid_t uid; username = nextarg(option, argvp); ftsoptions &= ~FTS_NOSTAT; new = palloc(option); p = getpwnam(username); if (p == NULL) { char* cp = username; if( username[0] == '-' || username[0] == '+' ) username++; uid = atoi(username); if (uid == 0 && username[0] != '0') errx(1, "%s: %s: no such user", option->name, username); uid = find_parsenum(new, option->name, cp, NULL); } else uid = p->pw_uid; new->u_data = uid; return new; } /* * -xdev functions -- * * Always true, causes find not to descend past directories that have a * different device ID (st_dev, see stat() S5.6.2 [POSIX.1]) */ PLAN * c_xdev(OPTION *option, char ***argvp __unused) { ftsoptions |= FTS_XDEV; return palloc(option); } /* * ( expression ) functions -- * * True if expression is true. */ int f_expr(PLAN *plan, FTSENT *entry) { PLAN *p; int state = 0; for (p = plan->p_data[0]; p && (state = (p->execute)(p, entry)); p = p->next); return state; } /* * f_openparen and f_closeparen nodes are temporary place markers. They are * eliminated during phase 2 of find_formplan() --- the '(' node is converted * to a f_expr node containing the expression and the ')' node is discarded. * The functions themselves are only used as constants. */ int f_openparen(PLAN *plan __unused, FTSENT *entry __unused) { abort(); } int f_closeparen(PLAN *plan __unused, FTSENT *entry __unused) { abort(); } /* c_openparen == c_simple */ /* c_closeparen == c_simple */ /* * AND operator. Since AND is implicit, no node is allocated. */ PLAN * c_and(OPTION *option __unused, char ***argvp __unused) { return NULL; } /* * ! expression functions -- * * Negation of a primary; the unary NOT operator. */ int f_not(PLAN *plan, FTSENT *entry) { PLAN *p; int state = 0; for (p = plan->p_data[0]; p && (state = (p->execute)(p, entry)); p = p->next); return !state; } /* c_not == c_simple */ /* * expression -o expression functions -- * * Alternation of primaries; the OR operator. The second expression is * not evaluated if the first expression is true. */ int f_or(PLAN *plan, FTSENT *entry) { PLAN *p; int state = 0; for (p = plan->p_data[0]; p && (state = (p->execute)(p, entry)); p = p->next); if (state) return 1; for (p = plan->p_data[1]; p && (state = (p->execute)(p, entry)); p = p->next); return state; } /* c_or == c_simple */ /* * -false * * Always false. */ int f_false(PLAN *plan __unused, FTSENT *entry __unused) { return 0; } /* c_false == c_simple */ /* * -quit * * Exits the program */ int f_quit(PLAN *plan __unused, FTSENT *entry __unused) { finish_execplus(); exit(0); } /* c_quit == c_simple */