/*
* Copy password file from one descriptor to another, replacing or adding
* a single record on the way.
*/
int
pw_copy(int ffd, int tfd, const struct passwd *pw, struct passwd *old_pw)
{
char buf[8192], *end, *line, *p, *q, *r, t;
struct passwd *fpw;
size_t len;
int eof, readlen;
if ((line = pw_make(pw)) == NULL)
return (-1);
eof = 0;
len = 0;
p = q = end = buf;
for (;;) {
/* find the end of the current line */
for (p = q; q < end && *q != '\0'; ++q)
if (*q == '\n')
break;
/* if we don't have a complete line, fill up the buffer */
if (q >= end) {
if (eof)
break;
if ((size_t)(q - p) >= sizeof(buf)) {
warnx("passwd line too long");
errno = EINVAL; /* hack */
goto err;
}
if (p < end) {
q = memmove(buf, p, end - p);
end -= p - buf;
} else {
p = q = end = buf;
}
readlen = read(ffd, end, sizeof(buf) - (end - buf));
if (readlen == -1)
goto err;
else
len = (size_t)readlen;
if (len == 0 && p == buf)
break;
end += len;
len = end - buf;
if (len < (ssize_t)sizeof(buf)) {
eof = 1;
if (len > 0 && buf[len - 1] != '\n')
++len, *end++ = '\n';
}
continue;
}
/* is it a blank line or a comment? */
for (r = p; r < q && isspace(*r); ++r)
/* nothing */ ;
if (r == q || *r == '#') {
/* yep */
if (write(tfd, p, q - p + 1) != q - p + 1)
goto err;
++q;
continue;
}
/* is it the one we're looking for? */
t = *q;
*q = '\0';
fpw = pw_scan(r, PWSCAN_MASTER);
/*
* fpw is either the struct passwd for the current line,
* or NULL if the line is malformed.
*/
*q = t;
if (fpw == NULL || strcmp(fpw->pw_name, pw->pw_name) != 0) {
/* nope */
if (fpw != NULL)
free(fpw);
if (write(tfd, p, q - p + 1) != q - p + 1)
goto err;
++q;
continue;
}
if (old_pw && !pw_equal(fpw, old_pw)) {
warnx("entry inconsistent");
free(fpw);
errno = EINVAL; /* hack */
goto err;
}
free(fpw);
/* it is, replace it */
len = strlen(line);
if (write(tfd, line, len) != (int)len)
goto err;
/* we're done, just copy the rest over */
for (;;) {
if (write(tfd, q, end - q) != end - q)
goto err;
q = buf;
readlen = read(ffd, buf, sizeof(buf));
if (readlen == 0)
break;
else
len = (size_t)readlen;
if (readlen == -1)
goto err;
end = buf + len;
}
goto done;
}
/* if we got here, we have a new entry */
len = strlen(line);
if ((size_t)write(tfd, line, len) != len ||
write(tfd, "\n", 1) != 1)
goto err;
done:
free(line);
return (0);
err:
free(line);
return (-1);
}
static int
print_user(struct passwd * pwd, int pretty, int v7)
{
if (!pretty) {
char *buf;
if (!v7)
pwd->pw_passwd = (pwd->pw_passwd == NULL) ? "" : "*";
buf = v7 ? pw_make_v7(pwd) : pw_make(pwd);
printf("%s\n", buf);
free(buf);
} else {
int j;
char *p;
struct group *grp = GETGRGID(pwd->pw_gid);
char uname[60] = "User &", office[60] = "[None]",
wphone[60] = "[None]", hphone[60] = "[None]";
char acexpire[32] = "[None]", pwexpire[32] = "[None]";
struct tm * tptr;
if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
strlcpy(uname, p, sizeof(uname));
if ((p = strtok(NULL, ",")) != NULL) {
strlcpy(office, p, sizeof(office));
if ((p = strtok(NULL, ",")) != NULL) {
strlcpy(wphone, p, sizeof(wphone));
if ((p = strtok(NULL, "")) != NULL) {
strlcpy(hphone, p,
sizeof(hphone));
}
}
}
}
/*
* Handle '&' in gecos field
*/
if ((p = strchr(uname, '&')) != NULL) {
int l = strlen(pwd->pw_name);
int m = strlen(p);
memmove(p + l, p + 1, m);
memmove(p, pwd->pw_name, l);
*p = (char) toupper((unsigned char)*p);
}
if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL)
strftime(acexpire, sizeof acexpire, "%c", tptr);
if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL)
strftime(pwexpire, sizeof pwexpire, "%c", tptr);
printf("Login Name: %-15s #%-12ld Group: %-15s #%ld\n"
" Full Name: %s\n"
" Home: %-26.26s Class: %s\n"
" Shell: %-26.26s Office: %s\n"
"Work Phone: %-26.26s Home Phone: %s\n"
"Acc Expire: %-26.26s Pwd Expire: %s\n",
pwd->pw_name, (long) pwd->pw_uid,
grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid,
uname, pwd->pw_dir, pwd->pw_class,
pwd->pw_shell, office, wphone, hphone,
acexpire, pwexpire);
SETGRENT();
j = 0;
while ((grp=GETGRENT()) != NULL)
{
int i = 0;
if (grp->gr_mem != NULL) {
while (grp->gr_mem[i] != NULL)
{
if (strcmp(grp->gr_mem[i], pwd->pw_name)==0)
{
printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name);
break;
}
++i;
}
}
}
ENDGRENT();
printf("%s", j ? "\n" : "");
}
return EXIT_SUCCESS;
}
static struct passwd *
verify(const char *tfn, struct passwd *pw)
{
struct passwd *npw;
ENTRY *ep;
char *buf, *p, *val;
struct stat sb;
FILE *fp;
int line;
size_t len;
if ((pw = pw_dup(pw)) == NULL)
return (NULL);
if ((fp = fopen(tfn, "r")) == NULL ||
fstat(fileno(fp), &sb) == -1) {
warn("%s", tfn);
free(pw);
return (NULL);
}
if (sb.st_size == 0) {
warnx("corrupted temporary file");
fclose(fp);
free(pw);
return (NULL);
}
val = NULL;
for (line = 1; (buf = fgetln(fp, &len)) != NULL; ++line) {
if (*buf == '\0' || *buf == '#')
continue;
while (len > 0 && isspace(buf[len - 1]))
--len;
for (ep = list;; ++ep) {
if (!ep->prompt) {
warnx("%s: unrecognized field on line %d",
tfn, line);
goto bad;
}
if (ep->len > len)
continue;
if (strncasecmp(buf, ep->prompt, ep->len) != 0)
continue;
if (ep->restricted && !master_mode) {
warnx("%s: you may not change the %s field",
tfn, ep->prompt);
goto bad;
}
for (p = buf; p < buf + len && *p != ':'; ++p)
/* nothing */ ;
if (*p != ':') {
warnx("%s: line %d corrupted", tfn, line);
goto bad;
}
while (++p < buf + len && isspace(*p))
/* nothing */ ;
free(val);
asprintf(&val, "%.*s", (int)(buf + len - p), p);
if (val == NULL)
goto bad;
if (ep->except && strpbrk(val, ep->except)) {
warnx("%s: invalid character in \"%s\" field '%s'",
tfn, ep->prompt, val);
goto bad;
}
if ((ep->func)(val, pw, ep))
goto bad;
break;
}
}
free(val);
fclose(fp);
/* Build the gecos field. */
len = asprintf(&p, "%s,%s,%s,%s,%s", list[E_NAME].save,
list[E_LOCATE].save, list[E_BPHONE].save,
list[E_HPHONE].save, list[E_OTHER].save);
if (p == NULL) {
warn("asprintf()");
free(pw);
return (NULL);
}
while (len > 0 && p[len - 1] == ',')
p[--len] = '\0';
pw->pw_gecos = p;
buf = pw_make(pw);
free(pw);
free(p);
if (buf == NULL) {
warn("pw_make()");
return (NULL);
}
npw = pw_scan(buf, PWSCAN_WARN|PWSCAN_MASTER);
free(buf);
return (npw);
bad:
free(pw);
free(val);
fclose(fp);
return (NULL);
}
