120 lines
2.4 KiB
C
120 lines
2.4 KiB
C
/* Scheme48/scsh Unix system interface.
|
|
** User and group db access routines
|
|
** Copyright (c) 1993, 1994 by Olin Shivers.
|
|
*/
|
|
|
|
/*
|
|
** The code in this file is separated out from the code in syscalls1.c
|
|
** because we must compile them with different compiler flags (non-posix)
|
|
** to get around a NeXTSTEP bug. Once they get their act together, we can
|
|
** stick it back into syscalls1.c.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <grp.h>
|
|
#include <pwd.h>
|
|
|
|
/* Make sure our exports match up w/the implementation: */
|
|
#include "userinfo1.h"
|
|
|
|
#include <unistd.h>
|
|
|
|
/* Compute the length of a null-terminated char* vector. */
|
|
static int strvec_len(char **vec)
|
|
{
|
|
int i = 0;
|
|
char **ptr = vec;
|
|
if ( !ptr ) return 0;
|
|
|
|
while( *ptr++ ) i++;
|
|
|
|
return i;
|
|
}
|
|
|
|
|
|
/* User db access routines
|
|
*******************************************************************************
|
|
*/
|
|
|
|
/* Return a user name for ourself.
|
|
** Uses our *real* uid, not our effective one.
|
|
*/
|
|
|
|
char *my_username(void)
|
|
{
|
|
char *s = getlogin();
|
|
if( s ) return s;
|
|
else {
|
|
struct passwd *pwd = getpwuid(getuid());
|
|
return pwd ? pwd->pw_name : (char*) 0;
|
|
}
|
|
}
|
|
|
|
int user_info_uid(uid_t uid,
|
|
char **name, gid_t *gid, char **dir, char **shell)
|
|
{
|
|
struct passwd *pwd = getpwuid(uid);
|
|
if( !pwd ) {
|
|
*name = 0;
|
|
*gid = 0;
|
|
*dir = 0;
|
|
*shell = 0;
|
|
return 0;
|
|
}
|
|
*name = pwd->pw_name;
|
|
*gid = pwd->pw_gid;
|
|
*dir = pwd->pw_dir;
|
|
*shell = pwd->pw_shell;
|
|
return 1;
|
|
}
|
|
|
|
int user_info_name(const char *name,
|
|
uid_t *uid, gid_t *gid, char **dir, char **shell)
|
|
{
|
|
struct passwd *pwd = getpwnam(name);
|
|
if( !pwd ) {
|
|
*uid = 0;
|
|
*gid = 0;
|
|
*dir = 0;
|
|
*shell = 0;
|
|
return 0;
|
|
}
|
|
*uid = pwd->pw_uid;
|
|
*gid = pwd->pw_gid;
|
|
*dir = pwd->pw_dir;
|
|
*shell = pwd->pw_shell;
|
|
return 1;
|
|
}
|
|
|
|
|
|
int group_info_gid (int gid, char **name, char ***members, int *nmembers)
|
|
{
|
|
struct group *grp = getgrgid(gid);
|
|
if( !grp ) {
|
|
name = 0;
|
|
members = 0;
|
|
nmembers = 0;
|
|
return 0;
|
|
}
|
|
*name = grp->gr_name;
|
|
*members = grp->gr_mem;
|
|
*nmembers = strvec_len(grp->gr_mem);
|
|
return 1;
|
|
}
|
|
|
|
int group_info_name (const char *name,
|
|
int *gid, char ***members, int *nmembers)
|
|
{
|
|
struct group *grp = getgrnam(name);
|
|
if( !grp ) {
|
|
gid = 0;
|
|
members = 0;
|
|
nmembers = 0;
|
|
return 0;
|
|
}
|
|
*gid = grp->gr_gid;
|
|
*members = grp->gr_mem;
|
|
*nmembers = strvec_len(grp->gr_mem);
|
|
return 1;
|
|
}
|