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Changes so the 'pw' command will allow '$' as the last character in a userid

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or group name (mainly for the benefit of samba).  This pretty much rewrites
he pw_checkname() routine, but should work exactly the same except for the
above change, and that error messages are somewhat more informative.

PR:		28733 46890
Inspired by:	example patch written by Terry Lambert
Reviewed by:	no objections on freebsd-arch and freebsd-current
MFC plans:	no plans, but will do if people want it in stable.
This commit is contained in:
Garance A Drosehn 2003-01-28 01:21:57 +00:00
parent 9015b953d6
commit 84a0950aea
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=109961
1 changed files with 50 additions and 13 deletions
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63
usr.sbin/pw/pw_user.c
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@ -1194,21 +1194,58 @@ print_user(struct passwd * pwd, int pretty, int v7)
char *
pw_checkname(u_char *name, int gecos)
{
int l = 0;
char const *notch = gecos ? ":!@" : " ,\t:+&#%$^()!@~*?<>=|\\/\"";
char showch[8];
u_char const *badchars, *ch, *showtype;
int reject;
while (name[l]) {
if (strchr(notch, name[l]) != NULL || name[l] < ' ' || name[l] == 127 ||
(!gecos && l==0 && name[l] == '-') || /* leading '-' */
(!gecos && name[l] & 0x80)) /* 8-bit */
errx(EX_DATAERR, (name[l] >= ' ' && name[l] < 127)
? "invalid character `%c' in field"
: "invalid character 0x%02x in field",
name[l]);
++l;
ch = name;
reject = 0;
if (gecos) {
/* See if the name is valid as a gecos (comment) field. */
badchars = ":!@";
showtype = "gecos field";
} else {
/* See if the name is valid as a userid or group. */
badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\"";
showtype = "userid/group name";
/* Userids and groups can not have a leading '-'. */
if (*ch == '-')
reject = 1;
}
if (!gecos && l > LOGNAMESIZE)
errx(EX_DATAERR, "name too long `%s'", name);
if (!reject) {
while (*ch) {
if (strchr(badchars, *ch) != NULL || *ch < ' ' ||
*ch == 127) {
reject = 1;
break;
}
/* 8-bit characters are only allowed in GECOS fields */
if (!gecos && (*ch & 0x80)) {
reject = 1;
break;
}
ch++;
}
}
/*
* A `$' is allowed as the final character for userids and groups,
* mainly for the benefit of samba.
*/
if (reject && !gecos) {
if (*ch == '$' && *(ch + 1) == '\0') {
reject = 0;
ch++;
}
}
if (reject) {
snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127)
? "`%c'" : "0x%02x", *ch);
errx(EX_DATAERR, "invalid character %s at position %d in %s",
showch, (ch - name), showtype);
}
if (!gecos && (ch - name) > LOGNAMESIZE)
errx(EX_DATAERR, "name too long `%s' (max is %d)", name,
LOGNAMESIZE);
return (char *)name;
}