/* Get uid and gid for @user. */
static bool get_uid_gid(const char *user, uid_t *uid, gid_t *gid)
{
- struct passwd *pwent;
+ strcut passwd pwent;
+ struct passwd *pwentp = NULL;
+ char *buf;
+ size_t bufsize;
+ int ret;
+
+ bufsize = sysconf(_SC_GETPW_R_SIZE_MAX);
+ if (bufsize == -1)
+ bufsize = 1024;
+
+ buf = malloc(bufsize);
+ if (!buf)
+ return false;
+
+ ret = getpwnam_r(user, &pwent, buf, bufsize, &pwentp);
+ if (!pwentp) {
+ if (ret == 0)
+ mysyslog(LOG_ERR, "Could not find matched password record.\n", NULL);
- pwent = getpwnam(user);
- if (!pwent)
+ free(buf);
return false;
+ }
- *uid = pwent->pw_uid;
- *gid = pwent->pw_gid;
+ *uid = pwent.pw_uid;
+ *gid = pwent.pw_gid;
+ free(buf);
return true;
}
static bool lookup_user(const char *optarg, uid_t *uid)
{
char name[TOOL_MAXPATHLEN];
- struct passwd *pwent = NULL;
+ struct passwd pwent;
+ struct passwd *pwentp = NULL;
+ char *buf;
+ size_t bufsize;
+ int ret;
if (!optarg || (optarg[0] == '\0'))
return false;
+ bufsize = sysconf(_SC_GETPW_R_SIZE_MAX);
+ if (bufsize == -1)
+ bufsize = 1024;
+
+ buf = malloc(bufsize);
+ if (!buf)
+ return false;
+
if (sscanf(optarg, "%u", uid) < 1) {
/* not a uid -- perhaps a username */
if (sscanf(optarg, "%s", name) < 1)
return false;
- pwent = getpwnam(name);
- if (!pwent) {
+ ret = getpwnam_r(name, &pwent, buf, bufsize, &pwentp);
+ if (!pwentp) {
+ if (ret == 0)
+ fprintf(stderr, "could not find matched password record\n");
+
fprintf(stderr, "invalid username %s\n", name);
+ free(buf);
return false;
}
- *uid = pwent->pw_uid;
+ *uid = pwent.pw_uid;
} else {
- pwent = getpwuid(*uid);
- if (!pwent) {
+ ret = getpwuid_r(*uid, &pwent, buf, bufsize, &pwentp);
+ if (!pwentp) {
+ if (ret == 0)
+ fprintf(stderr, "could not find matched password record\n");
+
fprintf(stderr, "invalid uid %u\n", *uid);
+ free(buf);
return false;
}
}
+
+ free(buf);
return true;
}