diff options
| -rw-r--r-- | loginutils/adduser.c | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/loginutils/adduser.c b/loginutils/adduser.c index 3154806..d4b5013 100644 --- a/loginutils/adduser.c +++ b/loginutils/adduser.c @@ -33,18 +33,17 @@ static void passwd_study(struct passwd *p) } /* check for a free uid (and maybe gid) */ - while (getpwuid(p->pw_uid) || (!p->pw_gid && getgrgid(p->pw_uid))) + while (getpwuid(p->pw_uid) || (p->pw_gid == (gid_t)-1 && getgrgid(p->pw_uid))) { p->pw_uid++; + if (p->pw_uid > max) + bb_error_msg_and_die("no free uids left"); + } - if (!p->pw_gid) { - /* new gid = uid */ - p->pw_gid = p->pw_uid; + if (p->pw_gid == (gid_t)-1) { + p->pw_gid = p->pw_uid; /* new gid = uid */ if (getgrnam(p->pw_name)) bb_error_msg_and_die("group name '%s' is in use", p->pw_name); } - - if (p->pw_uid > max) - bb_error_msg_and_die("no free uids left"); } static void addgroup_wrapper(struct passwd *p) @@ -90,6 +89,7 @@ int adduser_main(int argc UNUSED_PARAM, char **argv) struct passwd pw; const char *usegroup = NULL; FILE *file; + int fd; #if ENABLE_FEATURE_ADDUSER_LONG_OPTIONS applet_long_options = adduser_longopts; @@ -117,7 +117,7 @@ int adduser_main(int argc UNUSED_PARAM, char **argv) pw.pw_dir = xasprintf("/home/%s", argv[0]); } pw.pw_passwd = (char *)"x"; - pw.pw_gid = usegroup ? xgroup2gid(usegroup) : 0; /* exits on failure */ + pw.pw_gid = usegroup ? xgroup2gid(usegroup) : -1; /* exits on failure */ /* make sure everything is kosher and setup uid && maybe gid */ passwd_study(&pw); @@ -134,17 +134,19 @@ int adduser_main(int argc UNUSED_PARAM, char **argv) #if ENABLE_FEATURE_SHADOWPASSWDS /* add to shadow if necessary */ - file = fopen_or_warn(bb_path_shadow_file, "a"); - if (file) { - //fseek(file, 0, SEEK_END); - fprintf(file, "%s:!:%u:0:99999:7:::\n", + /* fopen(..., "a"); would create shadow file, which is wrong. + * If shadow file doesn't exist, admin probably does not want it */ + fd = open_or_warn(bb_path_shadow_file, O_WRONLY | O_APPEND); + if (fd >= 0) { + char *s = xasprintf("%s:!:%u:0:99999:7:::\n", pw.pw_name, /* username */ (unsigned)(time(NULL) / 86400) /* sp->sp_lstchg */ /*0,*/ /* sp->sp_min */ /*99999,*/ /* sp->sp_max */ /*7*/ /* sp->sp_warn */ ); - fclose(file); + xwrite(fd, s, strlen(s)); + close(fd); } #endif |