/* * Copyright (C) 2003 Manuel Novoa III * * Licensed under LGPL v2.1, see the file COPYING.LIB in this tarball for details. */ /* Nov 6, 2003 Initial version. * * NOTE: This implementation is quite strict about requiring all * field seperators. It also does not allow leading whitespace * except when processing the numeric fields. glibc is more * lenient. See the various glibc difference comments below. * * TODO: * Move to dynamic allocation of (currently staticly allocated) * buffers; especially for the group-related functions since * large group member lists will cause error returns. * */ #define _GNU_SOURCE #include <features.h> #include <stdio.h> #include <stdlib.h> #include <stdint.h> #include <string.h> #include <stddef.h> #include <errno.h> #include <assert.h> #include <ctype.h> #include <pwd.h> #include <grp.h> #include <paths.h> #ifdef __HAS_SHADOW__ #include <shadow.h> #endif #ifdef __UCLIBC_HAS_THREADS__ #include <pthread.h> #endif /**********************************************************************/ /* Sizes for staticly allocated buffers. */ /* If you change these values, also change _SC_GETPW_R_SIZE_MAX and * _SC_GETGR_R_SIZE_MAX in libc/unistd/sysconf.c to match */ #define PWD_BUFFER_SIZE 256 #define GRP_BUFFER_SIZE 256 /**********************************************************************/ /* Prototypes for internal functions. */ #ifndef GETXXKEY_R_FUNC #error GETXXKEY_R_FUNC is not defined! #endif /**********************************************************************/ #ifdef GETXXKEY_R_FUNC int attribute_hidden GETXXKEY_R_FUNC_HIDDEN(DO_GETXXKEY_R_KEYTYPE key, GETXXKEY_R_ENTTYPE *__restrict resultbuf, char *__restrict buffer, size_t buflen, GETXXKEY_R_ENTTYPE **__restrict result) { FILE *stream; int rv; *result = NULL; if (!(stream = fopen(DO_GETXXKEY_R_PATHNAME, "r"))) { rv = errno; } else { __STDIO_SET_USER_LOCKING(stream); do { if (!(rv = __pgsreader(GETXXKEY_R_PARSER, resultbuf, buffer, buflen, stream)) ) { if (GETXXKEY_R_TEST(resultbuf)) { /* Found key? */ *result = resultbuf; break; } } else { if (rv == ENOENT) { /* end-of-file encountered. */ rv = 0; } break; } } while (1); fclose(stream); } return rv; } strong_alias(GETXXKEY_R_FUNC_HIDDEN,GETXXKEY_R_FUNC) #endif /**********************************************************************/ #undef GETXXKEY_R_FUNC_HIDDEN #undef GETXXKEY_R_FUNC #undef GETXXKEY_R_PARSER #undef GETXXKEY_R_ENTTYPE #undef GETXXKEY_R_TEST #undef DO_GETXXKEY_R_KEYTYPE #undef DO_GETXXKEY_R_PATHNAME