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[unix-history] / usr / src / bin / pax / sel_subs.c
/*-
* Copyright (c) 1992 Keith Muller.
* Copyright (c) 1992 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.
*
* %sccs.include.redist.c%
*/
#ifndef lint
static char sccsid[] = "@(#)sel_subs.c 1.3 (Berkeley) %G%";
#endif /* not lint */
#include <sys/types.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <pwd.h>
#include <grp.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>
#include <stdlib.h>
#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
*/
#if __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;
*/
#if __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)) {
warn(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) {
warn(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, (char **)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);
}
warn(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
*/
#if __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;
*/
#if __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)) {
warn(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) {
warn(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, (char **)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);
}
warn(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
*/
#if __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
*/
#if __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')) {
warn(1, "Empty time range string");
return(-1);
}
/*
* locate optional flags suffix /{cm}.
*/
if ((flgpt = rindex(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;
}
warn(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) {
warn(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:
warn(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((time_t *)NULL);
if (*str != '\0') {
/*
* add lower limit
*/
if (str_sec(str, &(pt->low_time)) < 0) {
warn(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) {
warn(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) {
warn(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:
warn(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
*/
#if __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
*/
#if __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 = index(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);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.