/* $NetBSD: getgrent_r.c,v 1.1.1.2 2012/09/09 16:07:51 christos Exp $ */ /* * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") * Copyright (c) 1998-1999 by Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #if defined(LIBC_SCCS) && !defined(lint) static const char rcsid[] = "Id: getgrent_r.c,v 1.7 2005/04/27 04:56:24 sra Exp "; #endif /* LIBC_SCCS and not lint */ #include #if !defined(_REENTRANT) || !defined(DO_PTHREADS) || !defined(WANT_IRS_PW) static int getgrent_r_not_required = 0; #else #include #include #include #include #if (defined(POSIX_GETGRNAM_R) || defined(POSIX_GETGRGID_R)) && \ defined(_POSIX_PTHREAD_SEMANTICS) /* turn off solaris remapping in */ #define _UNIX95 #undef _POSIX_PTHREAD_SEMANTICS #include #define _POSIX_PTHREAD_SEMANTICS 1 #else #include #endif #include #include #ifdef GROUP_R_RETURN static int copy_group(struct group *, struct group *, char *buf, int buflen); /* POSIX 1003.1c */ #ifdef POSIX_GETGRNAM_R int __posix_getgrnam_r(const char *name, struct group *gptr, char *buf, int buflen, struct group **result) { #else int getgrnam_r(const char *name, struct group *gptr, char *buf, size_t buflen, struct group **result) { #endif struct group *ge = getgrnam(name); int res; if (ge == NULL) { *result = NULL; return (0); } res = copy_group(ge, gptr, buf, buflen); *result = res ? NULL : gptr; return (res); } #ifdef POSIX_GETGRNAM_R struct group * getgrnam_r(const char *name, struct group *gptr, char *buf, int buflen) { struct group *ge = getgrnam(name); int res; if (ge == NULL) return (NULL); res = copy_group(ge, gptr, buf, buflen); return (res ? NULL : gptr); } #endif /* POSIX_GETGRNAM_R */ /* POSIX 1003.1c */ #ifdef POSIX_GETGRGID_R int __posix_getgrgid_r(gid_t gid, struct group *gptr, char *buf, int buflen, struct group **result) { #else /* POSIX_GETGRGID_R */ int getgrgid_r(gid_t gid, struct group *gptr, char *buf, size_t buflen, struct group **result) { #endif /* POSIX_GETGRGID_R */ struct group *ge = getgrgid(gid); int res; if (ge == NULL) { *result = NULL; return (0); } res = copy_group(ge, gptr, buf, buflen); *result = res ? NULL : gptr; return (res); } #ifdef POSIX_GETGRGID_R struct group * getgrgid_r(gid_t gid, struct group *gptr, char *buf, int buflen) { struct group *ge = getgrgid(gid); int res; if (ge == NULL) return (NULL); res = copy_group(ge, gptr, buf, buflen); return (res ? NULL : gptr); } #endif /*% * These assume a single context is in operation per thread. * If this is not the case we will need to call irs directly * rather than through the base functions. */ GROUP_R_RETURN getgrent_r(struct group *gptr, GROUP_R_ARGS) { struct group *ge = getgrent(); int res; if (ge == NULL) { return (GROUP_R_BAD); } res = copy_group(ge, gptr, buf, buflen); return (res ? GROUP_R_BAD : GROUP_R_OK); } GROUP_R_SET_RETURN setgrent_r(GROUP_R_ENT_ARGS) { setgrent(); #ifdef GROUP_R_SET_RESULT return (GROUP_R_SET_RESULT); #endif } GROUP_R_END_RETURN endgrent_r(GROUP_R_ENT_ARGS) { endgrent(); GROUP_R_END_RESULT(GROUP_R_OK); } #if 0 /* XXX irs does not have a fgetgrent() */ GROUP_R_RETURN fgetgrent_r(FILE *f, struct group *gptr, GROUP_R_ARGS) { struct group *ge = fgetgrent(f); int res; if (ge == NULL) return (GROUP_R_BAD); res = copy_group(ge, gptr, buf, buflen); return (res ? GROUP_R_BAD : GROUP_R_OK); } #endif /* Private */ static int copy_group(struct group *ge, struct group *gptr, char *buf, int buflen) { char *cp; int i, n; int numptr, len; /* Find out the amount of space required to store the answer. */ numptr = 1; /*%< NULL ptr */ len = (char *)ALIGN(buf) - buf; for (i = 0; ge->gr_mem[i]; i++, numptr++) { len += strlen(ge->gr_mem[i]) + 1; } len += strlen(ge->gr_name) + 1; len += strlen(ge->gr_passwd) + 1; len += numptr * sizeof(char*); if (len > buflen) { errno = ERANGE; return (ERANGE); } /* copy group id */ gptr->gr_gid = ge->gr_gid; cp = (char *)ALIGN(buf) + numptr * sizeof(char *); /* copy official name */ n = strlen(ge->gr_name) + 1; strcpy(cp, ge->gr_name); gptr->gr_name = cp; cp += n; /* copy member list */ gptr->gr_mem = (char **)ALIGN(buf); for (i = 0 ; ge->gr_mem[i]; i++) { n = strlen(ge->gr_mem[i]) + 1; strcpy(cp, ge->gr_mem[i]); gptr->gr_mem[i] = cp; cp += n; } gptr->gr_mem[i] = NULL; /* copy password */ n = strlen(ge->gr_passwd) + 1; strcpy(cp, ge->gr_passwd); gptr->gr_passwd = cp; cp += n; return (0); } #else /* GROUP_R_RETURN */ static int getgrent_r_unknown_system = 0; #endif /* GROUP_R_RETURN */ #endif /* !def(_REENTRANT) || !def(DO_PTHREADS) || !def(WANT_IRS_PW) */ /*! \file */