diff options
Diffstat (limited to 'Linux-PAM/modules/pam_motd')
| -rw-r--r-- | Linux-PAM/modules/pam_motd/Makefile | 15 | ||||
| -rw-r--r-- | Linux-PAM/modules/pam_motd/pam_motd.c | 133 |
2 files changed, 148 insertions, 0 deletions
diff --git a/Linux-PAM/modules/pam_motd/Makefile b/Linux-PAM/modules/pam_motd/Makefile new file mode 100644 index 00000000..fb83807a --- /dev/null +++ b/Linux-PAM/modules/pam_motd/Makefile @@ -0,0 +1,15 @@ +# +# $Id: Makefile,v 1.2 2000/11/19 23:54:04 agmorgan Exp $ +# +# This Makefile controls a build process of $(TITLE) module for +# Linux-PAM. You should not modify this Makefile (unless you know +# what you are doing!). +# +# Created by Andrew Morgan <morgan@linux.kernel.org> 2000/08/27 +# + +include ../../Make.Rules + +TITLE=pam_motd + +include ../Simple.Rules diff --git a/Linux-PAM/modules/pam_motd/pam_motd.c b/Linux-PAM/modules/pam_motd/pam_motd.c new file mode 100644 index 00000000..ce695f92 --- /dev/null +++ b/Linux-PAM/modules/pam_motd/pam_motd.c @@ -0,0 +1,133 @@ +/* pam_motd module */ + +/* + * Modified for pam_motd by Ben Collins <bcollins@debian.org> + * + * Based off of: + * $Id: pam_motd.c,v 1.3 2004/09/22 09:37:49 kukuk Exp $ + * + * Written by Michael K. Johnson <johnsonm@redhat.com> 1996/10/24 + * + */ + +#include <security/_pam_aconf.h> + +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <pwd.h> + +#include <security/_pam_macros.h> +/* + * here, we make a definition for the externally accessible function + * in this file (this definition is required for static a module + * but strongly encouraged generally) it is used to instruct the + * modules include file to define the function prototypes. + */ + +#define PAM_SM_SESSION +#define DEFAULT_MOTD "/etc/motd" + +#include <security/pam_modules.h> +#include <security/_pam_modutil.h> + +/* --- session management functions (only) --- */ + +PAM_EXTERN +int pam_sm_close_session(pam_handle_t *pamh, int flags, int argc, + const char **argv) +{ + return PAM_IGNORE; +} + +PAM_EXTERN +int pam_sm_open_session(pam_handle_t *pamh, int flags, int argc, + const char **argv) +{ + int retval = PAM_IGNORE; + int fd; + char *mtmp=NULL; + const char *motd_path=NULL; + struct pam_conv *conversation; + struct pam_message message; + struct pam_message *pmessage = &message; + struct pam_response *resp = NULL; + struct stat st; + + if (flags & PAM_SILENT) { + return retval; + } + + for (; argc-- > 0; ++argv) { + if (!strncmp(*argv,"motd=",5)) { + + motd_path = (char *) strdup(5+*argv); + if (motd_path != NULL) { + D(("set motd path: %s (and a memory leak)", motd_path)); + } else { + D(("failed to duplicate motd path - ignored")); + } + } + } + + if (motd_path == NULL) + motd_path = DEFAULT_MOTD; + + message.msg_style = PAM_TEXT_INFO; + + if ((fd = open(motd_path, O_RDONLY, 0)) >= 0) { + /* fill in message buffer with contents of motd */ + if ((fstat(fd, &st) < 0) || !st.st_size) { + close(fd); + return retval; + } + message.msg = mtmp = malloc(st.st_size+1); + /* if malloc failed... */ + if (!message.msg) { + close(fd); + return retval; + } + if (_pammodutil_read(fd, mtmp, st.st_size) == st.st_size) { + if (mtmp[st.st_size-1] == '\n') + mtmp[st.st_size-1] = '\0'; + else + mtmp[st.st_size] = '\0'; + close(fd); + + /* Use conversation function to give user contents of motd */ + if (pam_get_item(pamh, PAM_CONV, (const void **)&conversation) == + PAM_SUCCESS && conversation) { + conversation->conv(1, (const struct pam_message **)&pmessage, + &resp, conversation->appdata_ptr); + if (resp) + _pam_drop_reply(resp, 1); + } + } + free(mtmp); + } + + return retval; +} + + +#ifdef PAM_STATIC + +/* static module data */ + +struct pam_module _pam_motd_modstruct = { + "pam_motd", + NULL, + NULL, + NULL, + pam_sm_open_session, + pam_sm_close_session, + NULL, +}; + +#endif + +/* end of module definition */ |