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Fix various unsigned vs signed errors that caused problems with uids

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and gids bigger than 16 bits. Added checks for uids and gids that are
bigger than 32 bits.

Approved by:	jkh (partly, this fix is bigger than I first intended)
This commit is contained in:
Paul Richards 2000-03-09 18:11:16 +00:00
parent 3c1124cfdf
commit cd7b8d78c7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=57868
3 changed files with 34 additions and 16 deletions
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19
lib/libc/gen/pw_scan.c
View File

@ -47,6 +47,7 @@ static const char rcsid[] =
#include <sys/param.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <pwd.h>
#include <stdio.h>
@ -72,7 +73,7 @@ pw_scan(bp, pw)
char *bp;
struct passwd *pw;
{
long id;
uid_t id;
int root;
char *p, *sh;
@ -100,13 +101,17 @@ pw_scan(bp, pw)
return (0);
}
}
id = atol(p);
id = strtoul(p, (char **)NULL, 10);
if (errno == ERANGE) {
warnx("%s > max uid value (%u)", p, ULONG_MAX);
return (0);
}
if (root && id) {
warnx("root uid should be 0");
return (0);
}
if (pw_big_ids_warning && id > USHRT_MAX) {
warnx("%s > max uid value (%u)", p, USHRT_MAX);
warnx("%s > recommended max uid value (%u)", p, USHRT_MAX);
/*return (0);*/ /* THIS SHOULD NOT BE FATAL! */
}
pw->pw_uid = id;
@ -114,9 +119,13 @@ pw_scan(bp, pw)
if (!(p = strsep(&bp, ":"))) /* gid */
goto fmt;
if(p[0]) pw->pw_fields |= _PWF_GID;
id = atol(p);
id = strtoul(p, (char **)NULL, 10);
if (errno == ERANGE) {
warnx("%s > max gid value (%u)", p, ULONG_MAX);
return (0);
}
if (pw_big_ids_warning && id > USHRT_MAX) {
warnx("%s > max gid value (%u)", p, USHRT_MAX);
warnx("%s > recommended max gid value (%u)", p, USHRT_MAX);
/* return (0); This should not be fatal! */
}
pw->pw_gid = id;

19
usr.sbin/pwd_mkdb/pw_scan.c
View File

@ -47,6 +47,7 @@ static const char rcsid[] =
#include <sys/param.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <pwd.h>
#include <stdio.h>
@ -72,7 +73,7 @@ pw_scan(bp, pw)
char *bp;
struct passwd *pw;
{
long id;
uid_t id;
int root;
char *p, *sh;
@ -100,13 +101,17 @@ pw_scan(bp, pw)
return (0);
}
}
id = atol(p);
id = strtoul(p, (char **)NULL, 10);
if (errno == ERANGE) {
warnx("%s > max uid value (%u)", p, ULONG_MAX);
return (0);
}
if (root && id) {
warnx("root uid should be 0");
return (0);
}
if (pw_big_ids_warning && id > USHRT_MAX) {
warnx("%s > max uid value (%u)", p, USHRT_MAX);
warnx("%s > recommended max uid value (%u)", p, USHRT_MAX);
/*return (0);*/ /* THIS SHOULD NOT BE FATAL! */
}
pw->pw_uid = id;
@ -114,9 +119,13 @@ pw_scan(bp, pw)
if (!(p = strsep(&bp, ":"))) /* gid */
goto fmt;
if(p[0]) pw->pw_fields |= _PWF_GID;
id = atol(p);
id = strtoul(p, (char **)NULL, 10);
if (errno == ERANGE) {
warnx("%s > max gid value (%u)", p, ULONG_MAX);
return (0);
}
if (pw_big_ids_warning && id > USHRT_MAX) {
warnx("%s > max gid value (%u)", p, USHRT_MAX);
warnx("%s > recommended max gid value (%u)", p, USHRT_MAX);
/* return (0); This should not be fatal! */
}
pw->pw_gid = id;

12
usr.sbin/pwd_mkdb/pwd_mkdb.c
View File

@ -320,9 +320,9 @@ main(argc, argv)
p = buf;
COMPACT(pwd.pw_name);
COMPACT("*");
memmove(p, &pwd.pw_uid, sizeof(int));
memmove(p, &pwd.pw_uid, sizeof(pwd.pw_uid));
p += sizeof(int);
memmove(p, &pwd.pw_gid, sizeof(int));
memmove(p, &pwd.pw_gid, sizeof(pwd.pw_gid));
p += sizeof(int);
memmove(p, &pwd.pw_change, sizeof(time_t));
p += sizeof(time_t);
@ -340,9 +340,9 @@ main(argc, argv)
p = sbuf;
COMPACT(pwd.pw_name);
COMPACT(pwd.pw_passwd);
memmove(p, &pwd.pw_uid, sizeof(int));
memmove(p, &pwd.pw_uid, sizeof(pwd.pw_uid));
p += sizeof(int);
memmove(p, &pwd.pw_gid, sizeof(int));
memmove(p, &pwd.pw_gid, sizeof(pwd.pw_gid));
p += sizeof(int);
memmove(p, &pwd.pw_change, sizeof(time_t));
p += sizeof(time_t);
@ -420,8 +420,8 @@ main(argc, argv)
char uidstr[20];
char gidstr[20];
snprintf(uidstr, sizeof(uidstr), "%d", pwd.pw_uid);
snprintf(gidstr, sizeof(gidstr), "%d", pwd.pw_gid);
snprintf(uidstr, sizeof(uidstr), "%u", pwd.pw_uid);
snprintf(gidstr, sizeof(gidstr), "%u", pwd.pw_gid);
if (fprintf(oldfp, "%s:*:%s:%s:%s:%s:%s\n",
pwd.pw_name, pwd.pw_fields & _PWF_UID ? uidstr : "",