/* $OpenBSD: sel_subs.c,v 1.6 1997/07/25 18:58:36 mickey Exp $ */ /* $NetBSD: sel_subs.c,v 1.5 1995/03/21 09:07:42 cgd Exp $ */ /*- * Copyright (c) 1992 Keith Muller. * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Keith Muller of the University of California, San Diego. * * 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[] = "@(#)sel_subs.c 8.1 (Berkeley) 5/31/93"; #else static char rcsid[] = "$OpenBSD: sel_subs.c,v 1.6 1997/07/25 18:58:36 mickey Exp $"; #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include "pax.h" #include "sel_subs.h" #include "extern.h" static int str_sec __P((register char *, time_t *)); static int usr_match __P((register ARCHD *)); static int grp_match __P((register ARCHD *)); static int trng_match __P((register ARCHD *)); static TIME_RNG *trhead = NULL; /* time range list head */ static TIME_RNG *trtail = NULL; /* time range list tail */ static USRT **usrtb = NULL; /* user selection table */ static GRPT **grptb = NULL; /* group selection table */ /* * Routines for selection of archive members */ /* * sel_chk() * check if this file matches a specfied uid, gid or time range * Return: * 0 if this archive member should be processed, 1 if it should be skipped */ #ifdef __STDC__ int sel_chk(register ARCHD *arcn) #else int sel_chk(arcn) register ARCHD *arcn; #endif { if (((usrtb != NULL) && usr_match(arcn)) || ((grptb != NULL) && grp_match(arcn)) || ((trhead != NULL) && trng_match(arcn))) return(1); return(0); } /* * User/group selection routines * * Routines to handle user selection of files based on the file uid/gid. To * add an entry, the user supplies either then name or the uid/gid starting with * a # on the command line. A \# will eascape the #. */ /* * usr_add() * add a user match to the user match hash table * Return: * 0 if added ok, -1 otherwise; */ #ifdef __STDC__ int usr_add(register char *str) #else int usr_add(str) register char *str; #endif { register u_int indx; register USRT *pt; register struct passwd *pw; register uid_t uid; /* * create the table if it doesn't exist */ if ((str == NULL) || (*str == '\0')) return(-1); if ((usrtb == NULL) && ((usrtb = (USRT **)calloc(USR_TB_SZ, sizeof(USRT *))) == NULL)) { paxwarn(1, "Unable to allocate memory for user selection table"); return(-1); } /* * figure out user spec */ if (str[0] != '#') { /* * it is a user name, \# escapes # as first char in user name */ if ((str[0] == '\\') && (str[1] == '#')) ++str; if ((pw = getpwnam(str)) == NULL) { paxwarn(1, "Unable to find uid for user: %s", str); return(-1); } uid = (uid_t)pw->pw_uid; } else # ifdef NET2_STAT uid = (uid_t)atoi(str+1); # else uid = (uid_t)strtoul(str+1, NULL, 10); # endif endpwent(); /* * hash it and go down the hash chain (if any) looking for it */ indx = ((unsigned)uid) % USR_TB_SZ; if ((pt = usrtb[indx]) != NULL) { while (pt != NULL) { if (pt->uid == uid) return(0); pt = pt->fow; } } /* * uid is not yet in the table, add it to the front of the chain */ if ((pt = (USRT *)malloc(sizeof(USRT))) != NULL) { pt->uid = uid; pt->fow = usrtb[indx]; usrtb[indx] = pt; return(0); } paxwarn(1, "User selection table out of memory"); return(-1); } /* * usr_match() * check if this files uid matches a selected uid. * Return: * 0 if this archive member should be processed, 1 if it should be skipped */ #ifdef __STDC__ static int usr_match(register ARCHD *arcn) #else static int usr_match(arcn) register ARCHD *arcn; #endif { register USRT *pt; /* * hash and look for it in the table */ pt = usrtb[((unsigned)arcn->sb.st_uid) % USR_TB_SZ]; while (pt != NULL) { if (pt->uid == arcn->sb.st_uid) return(0); pt = pt->fow; } /* * not found */ return(1); } /* * grp_add() * add a group match to the group match hash table * Return: * 0 if added ok, -1 otherwise; */ #ifdef __STDC__ int grp_add(register char *str) #else int grp_add(str) register char *str; #endif { register u_int indx; register GRPT *pt; register struct group *gr; register gid_t gid; /* * create the table if it doesn't exist */ if ((str == NULL) || (*str == '\0')) return(-1); if ((grptb == NULL) && ((grptb = (GRPT **)calloc(GRP_TB_SZ, sizeof(GRPT *))) == NULL)) { paxwarn(1, "Unable to allocate memory fo group selection table"); return(-1); } /* * figure out user spec */ if (str[0] != '#') { /* * it is a group name, \# escapes # as first char in group name */ if ((str[0] == '\\') && (str[1] == '#')) ++str; if ((gr = getgrnam(str)) == NULL) { paxwarn(1,"Cannot determine gid for group name: %s", str); return(-1); } gid = (gid_t)gr->gr_gid; } else # ifdef NET2_STAT gid = (gid_t)atoi(str+1); # else gid = (gid_t)strtoul(str+1, NULL, 10); # endif endgrent(); /* * hash it and go down the hash chain (if any) looking for it */ indx = ((unsigned)gid) % GRP_TB_SZ; if ((pt = grptb[indx]) != NULL) { while (pt != NULL) { if (pt->gid == gid) return(0); pt = pt->fow; } } /* * gid not in the table, add it to the front of the chain */ if ((pt = (GRPT *)malloc(sizeof(GRPT))) != NULL) { pt->gid = gid; pt->fow = grptb[indx]; grptb[indx] = pt; return(0); } paxwarn(1, "Group selection table out of memory"); return(-1); } /* * grp_match() * check if this files gid matches a selected gid. * Return: * 0 if this archive member should be processed, 1 if it should be skipped */ #ifdef __STDC__ static int grp_match(register ARCHD *arcn) #else static int grp_match(arcn) register ARCHD *arcn; #endif { register GRPT *pt; /* * hash and look for it in the table */ pt = grptb[((unsigned)arcn->sb.st_gid) % GRP_TB_SZ]; while (pt != NULL) { if (pt->gid == arcn->sb.st_gid) return(0); pt = pt->fow; } /* * not found */ return(1); } /* * Time range selection routines * * Routines to handle user selection of files based on the modification and/or * inode change time falling within a specified time range (the non-standard * -T flag). The user may specify any number of different file time ranges. * Time ranges are checked one at a time until a match is found (if at all). * If the file has a mtime (and/or ctime) which lies within one of the time * ranges, the file is selected. Time ranges may have a lower and/or a upper * value. These ranges are inclusive. When no time ranges are supplied to pax * with the -T option, all members in the archive will be selected by the time * range routines. When only a lower range is supplied, only files with a * mtime (and/or ctime) equal to or younger are selected. When only a upper * range is supplied, only files with a mtime (and/or ctime) equal to or older * are selected. When the lower time range is equal to the upper time range, * only files with a mtime (or ctime) of exactly that time are selected. */ /* * trng_add() * add a time range match to the time range list. * This is a non-standard pax option. Lower and upper ranges are in the * format: [yy[mm[dd[hh]]]]mm[.ss] and are comma separated. * Time ranges are based on current time, so 1234 would specify a time of * 12:34 today. * Return: * 0 if the time range was added to the list, -1 otherwise */ #ifdef __STDC__ int trng_add(register char *str) #else int trng_add(str) register char *str; #endif { register TIME_RNG *pt; register char *up_pt = NULL; register char *stpt; register char *flgpt; register int dot = 0; /* * throw out the badly formed time ranges */ if ((str == NULL) || (*str == '\0')) { paxwarn(1, "Empty time range string"); return(-1); } /* * locate optional flags suffix /{cm}. */ if ((flgpt = strrchr(str, '/')) != NULL) *flgpt++ = '\0'; for (stpt = str; *stpt != '\0'; ++stpt) { if ((*stpt >= '0') && (*stpt <= '9')) continue; if ((*stpt == ',') && (up_pt == NULL)) { *stpt = '\0'; up_pt = stpt + 1; dot = 0; continue; } /* * allow only one dot per range (secs) */ if ((*stpt == '.') && (!dot)) { ++dot; continue; } paxwarn(1, "Improperly specified time range: %s", str); goto out; } /* * allocate space for the time range and store the limits */ if ((pt = (TIME_RNG *)malloc(sizeof(TIME_RNG))) == NULL) { paxwarn(1, "Unable to allocate memory for time range"); return(-1); } /* * by default we only will check file mtime, but usee can specify * mtime, ctime (inode change time) or both. */ if ((flgpt == NULL) || (*flgpt == '\0')) pt->flgs = CMPMTME; else { pt->flgs = 0; while (*flgpt != '\0') { switch(*flgpt) { case 'M': case 'm': pt->flgs |= CMPMTME; break; case 'C': case 'c': pt->flgs |= CMPCTME; break; default: paxwarn(1, "Bad option %c with time range %s", *flgpt, str); goto out; } ++flgpt; } } /* * start off with the current time */ pt->low_time = pt->high_time = time(NULL); if (*str != '\0') { /* * add lower limit */ if (str_sec(str, &(pt->low_time)) < 0) { paxwarn(1, "Illegal lower time range %s", str); (void)free((char *)pt); goto out; } pt->flgs |= HASLOW; } if ((up_pt != NULL) && (*up_pt != '\0')) { /* * add upper limit */ if (str_sec(up_pt, &(pt->high_time)) < 0) { paxwarn(1, "Illegal upper time range %s", up_pt); (void)free((char *)pt); goto out; } pt->flgs |= HASHIGH; /* * check that the upper and lower do not overlap */ if (pt->flgs & HASLOW) { if (pt->low_time > pt->high_time) { paxwarn(1, "Upper %s and lower %s time overlap", up_pt, str); (void)free((char *)pt); return(-1); } } } pt->fow = NULL; if (trhead == NULL) { trtail = trhead = pt; return(0); } trtail->fow = pt; trtail = pt; return(0); out: paxwarn(1, "Time range format is: [yy[mm[dd[hh]]]]mm[.ss][/[c][m]]"); return(-1); } /* * trng_match() * check if this files mtime/ctime falls within any supplied time range. * Return: * 0 if this archive member should be processed, 1 if it should be skipped */ #ifdef __STDC__ static int trng_match(register ARCHD *arcn) #else static int trng_match(arcn) register ARCHD *arcn; #endif { register TIME_RNG *pt; /* * have to search down the list one at a time looking for a match. * remember time range limits are inclusive. */ pt = trhead; while (pt != NULL) { switch(pt->flgs & CMPBOTH) { case CMPBOTH: /* * user wants both mtime and ctime checked for this * time range */ if (((pt->flgs & HASLOW) && (arcn->sb.st_mtime < pt->low_time) && (arcn->sb.st_ctime < pt->low_time)) || ((pt->flgs & HASHIGH) && (arcn->sb.st_mtime > pt->high_time) && (arcn->sb.st_ctime > pt->high_time))) { pt = pt->fow; continue; } break; case CMPCTME: /* * user wants only ctime checked for this time range */ if (((pt->flgs & HASLOW) && (arcn->sb.st_ctime < pt->low_time)) || ((pt->flgs & HASHIGH) && (arcn->sb.st_ctime > pt->high_time))) { pt = pt->fow; continue; } break; case CMPMTME: default: /* * user wants only mtime checked for this time range */ if (((pt->flgs & HASLOW) && (arcn->sb.st_mtime < pt->low_time)) || ((pt->flgs & HASHIGH) && (arcn->sb.st_mtime > pt->high_time))) { pt = pt->fow; continue; } break; } break; } if (pt == NULL) return(1); return(0); } /* * str_sec() * Convert a time string in the format of [yy[mm[dd[hh]]]]mm[.ss] to gmt * seconds. Tval already has current time loaded into it at entry. * Return: * 0 if converted ok, -1 otherwise */ #ifdef __STDC__ static int str_sec(register char *str, time_t *tval) #else static int str_sec(str, tval) register char *str; time_t *tval; #endif { register struct tm *lt; register char *dot = NULL; lt = localtime(tval); if ((dot = strchr(str, '.')) != NULL) { /* * seconds (.ss) */ *dot++ = '\0'; if (strlen(dot) != 2) return(-1); if ((lt->tm_sec = ATOI2(dot)) > 61) return(-1); } else lt->tm_sec = 0; switch (strlen(str)) { case 10: /* * year (yy) * watch out for year 2000 */ if ((lt->tm_year = ATOI2(str)) < 69) lt->tm_year += 100; str += 2; /* FALLTHROUGH */ case 8: /* * month (mm) * watch out months are from 0 - 11 internally */ if ((lt->tm_mon = ATOI2(str)) > 12) return(-1); --lt->tm_mon; str += 2; /* FALLTHROUGH */ case 6: /* * day (dd) */ if ((lt->tm_mday = ATOI2(str)) > 31) return(-1); str += 2; /* FALLTHROUGH */ case 4: /* * hour (hh) */ if ((lt->tm_hour = ATOI2(str)) > 23) return(-1); str += 2; /* FALLTHROUGH */ case 2: /* * minute (mm) */ if ((lt->tm_min = ATOI2(str)) > 59) return(-1); break; default: return(-1); } /* * convert broken-down time to GMT clock time seconds */ if ((*tval = mktime(lt)) == -1) return(-1); return(0); }