2.11BSD/src/usr.sbin/edquota/edquota.c
/*
* Copyright (c) 1980, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Robert Elz at The University of Melbourne.
*
* 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.
*/
#if !defined(lint) && defined(DOSCCS)
static char copyright[] =
"@(#) Copyright (c) 1980, 1990, 1993\n\
The Regents of the University of California. All rights reserved.\n";
static char sccsid[] = "@(#)edquota.c 8.1.1 (2.11BSD) 1996/1/21";
#endif /* not lint */
/*
* Disk quota editor.
*/
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/wait.h>
#include <sys/quota.h>
#include <errno.h>
#include <fstab.h>
#include <pwd.h>
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <paths.h>
char *qfname = "quotas";
char tmpfil[] = "/tmp/EdP.aXXXXXX";
struct quotause {
struct quotause *next;
short flags;
struct dqblk dqblk;
char fsname[MAXPATHLEN + 1];
char qfname[1]; /* actually longer */
} *getprivs();
#define FOUND 0x01
uid_t getentry();
main(argc, argv)
register char **argv;
int argc;
{
register struct quotause *protoprivs, *curprivs;
extern char *optarg;
extern int optind;
uid_t id, protoid;
int tmpfd;
char *protoname, ch;
int pflag = 0;
if (argc < 2)
usage();
if (getuid()) {
fprintf(stderr, "edquota: permission denied\n");
exit(1);
}
while ((ch = getopt(argc, argv, "p:")) != EOF) {
switch(ch) {
case 'p':
protoname = optarg;
pflag++;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (pflag) {
if ((protoid = getentry(protoname)) == -1)
exit(1);
protoprivs = getprivs(protoid);
while (argc-- > 0) {
if ((id = getentry(*argv++)) < 0)
continue;
putprivs(id, protoprivs);
}
exit(0);
}
tmpfd = mkstemp(tmpfil);
fchown(tmpfd, getuid(), getgid());
for ( ; argc > 0; argc--, argv++) {
if ((id = getentry(*argv)) == -1)
continue;
curprivs = getprivs(id);
if (writeprivs(curprivs, tmpfd, *argv) == 0)
continue;
if (editit(tmpfil) && readprivs(curprivs, tmpfd))
putprivs(id, curprivs);
freeprivs(curprivs);
}
close(tmpfd);
unlink(tmpfil);
exit(0);
}
usage()
{
fputs("Usage: edquota [-p username] username ...\n", stderr);
exit(1);
}
/*
* This routine converts a name for a particular quota type to
* an identifier. This routine must agree with the kernel routine
* getinoquota as to the interpretation of quota types.
*/
uid_t
getentry(name)
char *name;
{
struct passwd *pw;
if (alldigits(name))
return (atoi(name));
if (pw = getpwnam(name))
return (pw->pw_uid);
fprintf(stderr, "%s: no such user\n", name);
sleep(1);
return (-1);
}
/*
* Collect the requested quota information.
*/
struct quotause *
getprivs(id)
u_int id;
{
register struct fstab *fs;
register struct quotause *qup, *quptail;
struct dqblk *dq;
struct quotause *quphead;
struct stat statb;
dev_t fsdev;
int qupsize, fd;
char *qfpathname;
static int warned = 0;
extern int errno;
setfsent();
quphead = (struct quotause *)0;
while (fs = getfsent()) {
if (stat(fs->fs_spec, &statb) < 0)
continue;
if (strcmp(fs->fs_vfstype, "ufs"))
continue;
if (!hasquota(fs, &qfpathname))
continue;
/*
* See the comments in quota.c about the check below.
*/
fsdev = statb.st_rdev;
if (stat(qfpathname, &statb) < 0 || statb.st_dev != fsdev)
continue;
qupsize = sizeof(*qup) + strlen(qfpathname);
if ((qup = (struct quotause *)malloc(qupsize)) == NULL) {
fprintf(stderr, "edquota: out of memory\n");
exit(2);
}
if (quota(Q_GETDLIM, id, fsdev, &qup->dqblk) != 0) {
if (errno == EOPNOTSUPP && !warned) {
warned++;
fprintf(stderr, "Warning: %s\n",
"Quotas are not compiled into this kernel");
sleep(3);
}
if ((fd = open(qfpathname, O_RDONLY)) < 0) {
fd = open(qfpathname, O_RDWR|O_CREAT, 0640);
if (fd < 0 && errno != ENOENT) {
perror(qfpathname);
free(qup);
continue;
}
fprintf(stderr, "Creating quota file %s\n",
qfpathname);
sleep(3);
(void) fchown(fd, getuid(), -1);
(void) fchmod(fd, 0640);
}
lseek(fd, (long)(id * sizeof(struct dqblk)), L_SET);
switch (read(fd, &qup->dqblk, sizeof(struct dqblk))) {
case 0: /* EOF */
/*
* Convert implicit 0 quota (EOF)
* into an explicit one (zero'ed dqblk)
*/
bzero((caddr_t)&qup->dqblk,
sizeof(struct dqblk));
break;
case sizeof(struct dqblk): /* OK */
/*
* We have to convert from bytes to disc blocks because the quotas file
* entries use bytes like the kernel does.
*/
dq = &qup->dqblk;
dq->dqb_curblocks = btodb(dq->dqb_curblocks);
dq->dqb_bhardlimit = btodb(dq->dqb_bhardlimit);
dq->dqb_bsoftlimit = btodb(dq->dqb_bsoftlimit);
break;
default: /* ERROR */
fprintf(stderr, "edquota: read error in ");
perror(qfpathname);
close(fd);
free(qup);
continue;
}
close(fd);
}
strcpy(qup->qfname, qfpathname);
strcpy(qup->fsname, fs->fs_file);
if (quphead == NULL)
quphead = qup;
else
quptail->next = qup;
quptail = qup;
qup->next = 0;
}
endfsent();
return (quphead);
}
/*
* Store the requested quota information.
*/
putprivs(id, quplist)
uid_t id;
struct quotause *quplist;
{
register struct quotause *qup;
struct stat sb;
int fd;
register struct dqblk *dq;
for (qup = quplist; qup; qup = qup->next) {
if (stat(qup->qfname, &sb) < 0) {
fprintf(stderr,"edquota: can't stat %s\n",qup->qfname);
continue;
}
if (quota(Q_SETDLIM, id, sb.st_dev, &qup->dqblk) == 0)
continue;
/*
* Have to convert from blocks to bytes now to be compatible with the kernel
*/
dq = &qup->dqblk;
dq->dqb_bhardlimit = dbtob(dq->dqb_bhardlimit);
dq->dqb_bsoftlimit = dbtob(dq->dqb_bsoftlimit);
dq->dqb_curblocks = dbtob(dq->dqb_curblocks);
if ((fd = open(qup->qfname, O_WRONLY)) < 0) {
perror(qup->qfname);
} else {
lseek(fd, (long)id * (long)sizeof (struct dqblk), 0);
if (write(fd, &qup->dqblk, sizeof (struct dqblk)) !=
sizeof (struct dqblk)) {
fprintf(stderr, "edquota: ");
perror(qup->qfname);
}
close(fd);
}
}
}
/*
* Take a list of priviledges and get it edited.
*/
editit(tmpfile)
char *tmpfile;
{
long omask;
pid_t pid;
union wait stat;
extern char *getenv();
omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
top:
if ((pid = vfork()) < 0) {
extern int errno;
if (errno == EPROCLIM) {
fprintf(stderr, "You have too many processes\n");
return(0);
}
if (errno == EAGAIN) {
sleep(1);
goto top;
}
perror("fork");
return (0);
}
if (pid == 0) {
register char *ed;
sigsetmask(omask);
setgid(getgid());
setuid(getuid());
if ((ed = getenv("EDITOR")) == (char *)0)
ed = _PATH_VI;
execlp(ed, ed, tmpfile, 0);
perror(ed);
exit(1);
}
waitpid(pid, &stat, 0);
sigsetmask(omask);
if (!WIFEXITED(stat) || WEXITSTATUS(stat) != 0)
return (0);
return (1);
}
/*
* Convert a quotause list to an ASCII file.
*/
writeprivs(quplist, outfd, name)
struct quotause *quplist;
int outfd;
char *name;
{
register struct quotause *qup;
register FILE *fd;
ftruncate(outfd, (off_t)0);
lseek(outfd, (off_t)0, L_SET);
if ((fd = fdopen(dup(outfd), "w")) == NULL) {
fprintf(stderr, "edquota: ");
perror(tmpfil);
exit(1);
}
fprintf(fd, "Quotas for %s:\n", name);
for (qup = quplist; qup; qup = qup->next) {
fprintf(fd, "%s: %s %ld, limits (soft = %ld, hard = %ld)\n",
qup->fsname, "blocks in use:",
qup->dqblk.dqb_curblocks,
qup->dqblk.dqb_bsoftlimit,
qup->dqblk.dqb_bhardlimit);
fprintf(fd, "%s %u, limits (soft = %u, hard = %u)\n",
"\tinodes in use:", qup->dqblk.dqb_curinodes,
qup->dqblk.dqb_isoftlimit, qup->dqblk.dqb_ihardlimit);
}
fclose(fd);
return (1);
}
/*
* Merge changes to an ASCII file into a quotause list.
*/
readprivs(quplist, infd)
struct quotause *quplist;
int infd;
{
register struct quotause *qup;
FILE *fd;
int cnt;
register char *cp;
struct dqblk dqblk;
char *fsp, line1[BUFSIZ], line2[BUFSIZ];
lseek(infd, (off_t)0, L_SET);
fd = fdopen(dup(infd), "r");
if (fd == NULL) {
fprintf(stderr, "Can't re-read temp file!!\n");
return (0);
}
/*
* Discard title line, then read pairs of lines to process.
*/
(void) fgets(line1, sizeof (line1), fd);
while (fgets(line1, sizeof (line1), fd) != NULL &&
fgets(line2, sizeof (line2), fd) != NULL) {
if ((fsp = strtok(line1, " \t:")) == NULL) {
fprintf(stderr, "%s: bad format\n", line1);
return (0);
}
if ((cp = strtok((char *)0, "\n")) == NULL) {
fprintf(stderr, "%s: %s: bad format\n", fsp,
&fsp[strlen(fsp) + 1]);
return (0);
}
cnt = sscanf(cp,
" blocks in use: %ld, limits (soft = %ld, hard = %ld)",
&dqblk.dqb_curblocks, &dqblk.dqb_bsoftlimit,
&dqblk.dqb_bhardlimit);
if (cnt != 3) {
fprintf(stderr, "%s:%s: bad format\n", fsp, cp);
return (0);
}
if ((cp = strtok(line2, "\n")) == NULL) {
fprintf(stderr, "%s: %s: bad format\n", fsp, line2);
return (0);
}
cnt = sscanf(cp,
"\tinodes in use: %u, limits (soft = %u, hard = %u)",
&dqblk.dqb_curinodes, &dqblk.dqb_isoftlimit,
&dqblk.dqb_ihardlimit);
if (cnt != 3) {
fprintf(stderr, "%s: %s: bad format\n", fsp, line2);
return (0);
}
for (qup = quplist; qup; qup = qup->next) {
if (strcmp(fsp, qup->fsname))
continue;
qup->dqblk.dqb_bsoftlimit = dqblk.dqb_bsoftlimit;
qup->dqblk.dqb_bhardlimit = dqblk.dqb_bhardlimit;
qup->dqblk.dqb_isoftlimit = dqblk.dqb_isoftlimit;
qup->dqblk.dqb_ihardlimit = dqblk.dqb_ihardlimit;
qup->flags |= FOUND;
if (dqblk.dqb_curblocks == qup->dqblk.dqb_curblocks &&
dqblk.dqb_curinodes == qup->dqblk.dqb_curinodes)
break;
fprintf(stderr,
"%s: cannot change current allocation\n", fsp);
break;
}
}
fclose(fd);
/*
* Disable quotas for any filesystems that have not been found.
*/
for (qup = quplist; qup; qup = qup->next) {
if (qup->flags & FOUND) {
qup->flags &= ~FOUND;
continue;
}
qup->dqblk.dqb_bsoftlimit = 0;
qup->dqblk.dqb_bhardlimit = 0;
qup->dqblk.dqb_isoftlimit = 0;
qup->dqblk.dqb_ihardlimit = 0;
}
return (1);
}
/*
* Free a list of quotause structures.
*/
freeprivs(quplist)
struct quotause *quplist;
{
register struct quotause *qup, *nextqup;
for (qup = quplist; qup; qup = nextqup) {
nextqup = qup->next;
free(qup);
}
}
/*
* Check whether a string is completely composed of digits.
*/
alldigits(s)
register char *s;
{
register c;
c = *s++;
do {
if (!isdigit(c))
return (0);
} while (c = *s++);
return (1);
}
/*
* Check to see if a particular quota is to be enabled.
*/
hasquota(fs, qfnamep)
register struct fstab *fs;
char **qfnamep;
{
register char *opt;
char *cp;
static char initname, usrname[100];
static char buf[BUFSIZ];
if (!initname) {
strcpy(usrname, qfname);
initname = 1;
}
strcpy(buf, fs->fs_mntops);
for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
if (cp = index(opt, '='))
*cp++ = '\0';
if (strcmp(opt, usrname) == 0)
break;
if (strcmp(opt, FSTAB_RQ) == 0) /* XXX compatibility */
break;
}
if (!opt)
return (0);
if (cp) {
*qfnamep = cp;
return (1);
}
(void) sprintf(buf, "%s/%s", fs->fs_file, qfname);
*qfnamep = buf;
return (1);
}