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* posix.h (scm_setgroups): New prototype.

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* posix.c (scm_setgroups): New.  Thanks to Paul Jarc!
(scm_getgroups): Handle groups ids that don't fit into a fixnum.
Don't use SCM_WRITABLE_VELTS.
This commit is contained in:
Marius Vollmer 2003-07-27 16:20:21 +00:00
parent d707b9df30
commit f360a962d4
2 changed files with 51 additions and 9 deletions
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57
libguile/posix.c
View file

@ -1,4 +1,4 @@
/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc.
/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2003 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -214,20 +214,61 @@ SCM_DEFINE (scm_getgroups, "getgroups", 0, 0, 0,
groups = scm_malloc (size);
getgroups (ngroups, groups);
result = scm_c_make_vector (ngroups, SCM_UNDEFINED);
result = scm_c_make_vector (ngroups, SCM_BOOL_F);
while (--ngroups >= 0)
SCM_VECTOR_SET (result, ngroups, scm_ulong2num (groups[ngroups]));
{
SCM * ve = SCM_WRITABLE_VELTS(result);
while (--ngroups >= 0)
ve[ngroups] = SCM_MAKINUM (groups [ngroups]);
}
free (groups);
return result;
}
#undef FUNC_NAME
#endif
#ifdef HAVE_SETGROUPS
SCM_DEFINE (scm_setgroups, "setgroups", 1, 0, 0,
(SCM group_vec),
"Set the supplementary group IDs to those found in the vector argument.")
#define FUNC_NAME s_scm_setgroups
{
size_t ngroups;
size_t size;
size_t i;
int result;
int save_errno;
GETGROUPS_T *groups;
SCM_VALIDATE_VECTOR (SCM_ARG1, group_vec);
ngroups = SCM_VECTOR_LENGTH (group_vec);
/* validate before allocating, so we don't have to worry about leaks */
for (i = 0; i < ngroups; i++)
{
unsigned long ulong_gid;
GETGROUPS_T gid;
SCM_VALIDATE_ULONG_COPY (1, SCM_VECTOR_REF (group_vec, i), ulong_gid);
gid = ulong_gid;
if (gid != ulong_gid)
SCM_OUT_OF_RANGE (1, SCM_VECTOR_REF (group_vec, i));
}
size = ngroups * sizeof (GETGROUPS_T);
/* XXX - if (size / sizeof (GETGROUPS_T) != ngroups) out-of-range */
groups = scm_malloc (size);
for(i = 0; i < ngroups; i++)
groups [i] = SCM_NUM2ULONG (1, SCM_VECTOR_REF (group_vec, i));
result = setgroups (ngroups, groups);
save_errno = errno; /* don't let free() touch errno */
free (groups);
errno = save_errno;
if (result < 0)
SCM_SYSERROR;
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME
#endif
#ifdef HAVE_GETPWENT
SCM_DEFINE (scm_getpwuid, "getpw", 0, 1, 0,
(SCM user),

3
libguile/posix.h
View file

@ -3,7 +3,7 @@
#ifndef SCM_POSIX_H
#define SCM_POSIX_H
/* Copyright (C) 1995,1996,1997,1998,2000,2001 Free Software Foundation, Inc.
/* Copyright (C) 1995,1996,1997,1998,2000,2001, 2003 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -36,6 +36,7 @@ SCM_API SCM scm_setsid (void);
SCM_API SCM scm_setpgid (SCM pid, SCM pgid);
SCM_API SCM scm_pipe (void);
SCM_API SCM scm_getgroups (void);
SCM_API SCM scm_setgroups (SCM groups);
SCM_API SCM scm_getpgrp (void);
SCM_API SCM scm_getpwuid (SCM user);
SCM_API SCM scm_setpwent (SCM arg);