/* -*- buffer-read-only: t -*- * * reentr.c * * Copyright (C) 2002, 2003, 2005, 2006, 2007 by Larry Wall and others * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. * * !!!!!!! DO NOT EDIT THIS FILE !!!!!!! * This file is built by regen/reentr.pl from data in regen/reentr.pl. * Any changes made here will be lost! */ /* * "Saruman," I said, standing away from him, "only one hand at a time can * wield the One, and you know that well, so do not trouble to say we!" * * [p.260 of _The Lord of the Rings_, II/ii: "The Council of Elrond"] */ /* * This file contains a collection of automatically created wrappers * (created by running reentr.pl) for reentrant (thread-safe) versions of * various library calls, such as getpwent_r. The wrapping is done so * that other files like pp_sys.c calling those library functions need not * care about the differences between various platforms' idiosyncrasies * regarding these reentrant interfaces. */ #include "EXTERN.h" #define PERL_IN_REENTR_C #include "perl.h" #include "reentr.h" #include "keywords.h" #define RenewDouble(data_pointer, size_pointer, type) \ STMT_START { \ const size_t size = MAX(*(size_pointer), 1) * 2; \ Renew((data_pointer), (size), type); \ *(size_pointer) = size; \ } STMT_END void Perl_reentrant_size(pTHX) { PERL_UNUSED_CONTEXT; /* Set the sizes of the reentrant buffers */ #ifdef USE_REENTRANT_API # define REENTRANTSMALLSIZE 256 /* Make something up. */ # define REENTRANTUSUALSIZE 4096 /* Make something up. */ # ifdef HAS_ASCTIME_R PL_reentrant_buffer->_asctime_size = 26; # endif /* HAS_ASCTIME_R */ # ifdef HAS_CRYPT_R # endif /* HAS_CRYPT_R */ # ifdef HAS_CTIME_R PL_reentrant_buffer->_ctime_size = 26; # endif /* HAS_CTIME_R */ # ifdef HAS_GETGRNAM_R # if defined(HAS_SYSCONF) && defined(_SC_GETGR_R_SIZE_MAX) && !defined(__GLIBC__) PL_reentrant_buffer->_grent_size = sysconf(_SC_GETGR_R_SIZE_MAX); if (PL_reentrant_buffer->_grent_size == (size_t) -1) PL_reentrant_buffer->_grent_size = REENTRANTUSUALSIZE; # elif defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ) PL_reentrant_buffer->_grent_size = SIABUFSIZ; # elif defined(__sgi) PL_reentrant_buffer->_grent_size = BUFSIZ; # else PL_reentrant_buffer->_grent_size = REENTRANTUSUALSIZE; # endif # endif /* HAS_GETGRNAM_R */ # ifdef HAS_GETHOSTBYNAME_R # if !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD) PL_reentrant_buffer->_hostent_size = REENTRANTUSUALSIZE; # endif # endif /* HAS_GETHOSTBYNAME_R */ # ifdef HAS_GETLOGIN_R PL_reentrant_buffer->_getlogin_size = REENTRANTSMALLSIZE; # endif /* HAS_GETLOGIN_R */ # ifdef HAS_GETNETBYNAME_R # if !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD) PL_reentrant_buffer->_netent_size = REENTRANTUSUALSIZE; # endif # endif /* HAS_GETNETBYNAME_R */ # ifdef HAS_GETPROTOBYNAME_R # if !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD) PL_reentrant_buffer->_protoent_size = REENTRANTUSUALSIZE; # endif # endif /* HAS_GETPROTOBYNAME_R */ # ifdef HAS_GETPWNAM_R # if defined(HAS_SYSCONF) && defined(_SC_GETPW_R_SIZE_MAX) && !defined(__GLIBC__) PL_reentrant_buffer->_pwent_size = sysconf(_SC_GETPW_R_SIZE_MAX); if (PL_reentrant_buffer->_pwent_size == (size_t) -1) PL_reentrant_buffer->_pwent_size = REENTRANTUSUALSIZE; # elif defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ) PL_reentrant_buffer->_pwent_size = SIABUFSIZ; # elif defined(__sgi) PL_reentrant_buffer->_pwent_size = BUFSIZ; # else PL_reentrant_buffer->_pwent_size = REENTRANTUSUALSIZE; # endif # endif /* HAS_GETPWNAM_R */ # ifdef HAS_GETSERVBYNAME_R # if !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD) PL_reentrant_buffer->_servent_size = REENTRANTUSUALSIZE; # endif # endif /* HAS_GETSERVBYNAME_R */ # ifdef HAS_GETSPNAM_R # if defined(HAS_SYSCONF) && defined(_SC_GETPW_R_SIZE_MAX) && !defined(__GLIBC__) PL_reentrant_buffer->_spent_size = sysconf(_SC_GETPW_R_SIZE_MAX); if (PL_reentrant_buffer->_spent_size == (size_t) -1) PL_reentrant_buffer->_spent_size = REENTRANTUSUALSIZE; # elif defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ) PL_reentrant_buffer->_spent_size = SIABUFSIZ; # elif defined(__sgi) PL_reentrant_buffer->_spent_size = BUFSIZ; # else PL_reentrant_buffer->_spent_size = REENTRANTUSUALSIZE; # endif # endif /* HAS_GETSPNAM_R */ # ifdef HAS_GMTIME_R # endif /* HAS_GMTIME_R */ # ifdef HAS_LOCALTIME_R # endif /* HAS_LOCALTIME_R */ # ifdef HAS_READDIR_R /* This is the size Solaris recommends. * (though we go static, should use pathconf() instead) */ PL_reentrant_buffer->_readdir_size = sizeof(struct dirent) + MAXPATHLEN + 1; # endif /* HAS_READDIR_R */ # ifdef HAS_READDIR64_R /* This is the size Solaris recommends. * (though we go static, should use pathconf() instead) */ PL_reentrant_buffer->_readdir64_size = sizeof(struct dirent64) + MAXPATHLEN + 1; # endif /* HAS_READDIR64_R */ # ifdef HAS_SETLOCALE_R PL_reentrant_buffer->_setlocale_size = REENTRANTSMALLSIZE; # endif /* HAS_SETLOCALE_R */ # ifdef HAS_STRERROR_R PL_reentrant_buffer->_strerror_size = REENTRANTSMALLSIZE; # endif /* HAS_STRERROR_R */ # ifdef HAS_TTYNAME_R PL_reentrant_buffer->_ttyname_size = REENTRANTSMALLSIZE; # endif /* HAS_TTYNAME_R */ #endif /* USE_REENTRANT_API */ } void Perl_reentrant_init(pTHX) { PERL_UNUSED_CONTEXT; /* Initialize the whole thing */ #ifdef USE_REENTRANT_API Newx(PL_reentrant_buffer, 1, REENTR); Perl_reentrant_size(aTHX); # ifdef HAS_ASCTIME_R Newx(PL_reentrant_buffer->_asctime_buffer, PL_reentrant_buffer->_asctime_size, char); # endif /* HAS_ASCTIME_R */ # ifdef HAS_CRYPT_R # if CRYPT_R_PROTO != REENTRANT_PROTO_B_CCD PL_reentrant_buffer->_crypt_struct_buffer = 0; # endif # endif /* HAS_CRYPT_R */ # ifdef HAS_CTIME_R Newx(PL_reentrant_buffer->_ctime_buffer, PL_reentrant_buffer->_ctime_size, char); # endif /* HAS_CTIME_R */ # ifdef HAS_GETGRNAM_R # ifdef USE_GRENT_FPTR PL_reentrant_buffer->_grent_fptr = NULL; # endif Newx(PL_reentrant_buffer->_grent_buffer, PL_reentrant_buffer->_grent_size, char); # endif /* HAS_GETGRNAM_R */ # ifdef HAS_GETHOSTBYNAME_R # if !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD) Newx(PL_reentrant_buffer->_hostent_buffer, PL_reentrant_buffer->_hostent_size, char); # endif # endif /* HAS_GETHOSTBYNAME_R */ # ifdef HAS_GETLOGIN_R Newx(PL_reentrant_buffer->_getlogin_buffer, PL_reentrant_buffer->_getlogin_size, char); # endif /* HAS_GETLOGIN_R */ # ifdef HAS_GETNETBYNAME_R # if !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD) Newx(PL_reentrant_buffer->_netent_buffer, PL_reentrant_buffer->_netent_size, char); # endif # endif /* HAS_GETNETBYNAME_R */ # ifdef HAS_GETPROTOBYNAME_R # if !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD) Newx(PL_reentrant_buffer->_protoent_buffer, PL_reentrant_buffer->_protoent_size, char); # endif # endif /* HAS_GETPROTOBYNAME_R */ # ifdef HAS_GETPWNAM_R # ifdef USE_PWENT_FPTR PL_reentrant_buffer->_pwent_fptr = NULL; # endif Newx(PL_reentrant_buffer->_pwent_buffer, PL_reentrant_buffer->_pwent_size, char); # endif /* HAS_GETPWNAM_R */ # ifdef HAS_GETSERVBYNAME_R # if !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD) Newx(PL_reentrant_buffer->_servent_buffer, PL_reentrant_buffer->_servent_size, char); # endif # endif /* HAS_GETSERVBYNAME_R */ # ifdef HAS_GETSPNAM_R # ifdef USE_SPENT_FPTR PL_reentrant_buffer->_spent_fptr = NULL; # endif Newx(PL_reentrant_buffer->_spent_buffer, PL_reentrant_buffer->_spent_size, char); # endif /* HAS_GETSPNAM_R */ # ifdef HAS_GMTIME_R # endif /* HAS_GMTIME_R */ # ifdef HAS_LOCALTIME_R # endif /* HAS_LOCALTIME_R */ # ifdef HAS_READDIR_R PL_reentrant_buffer->_readdir_struct = (struct dirent*)safemalloc(PL_reentrant_buffer->_readdir_size); # endif /* HAS_READDIR_R */ # ifdef HAS_READDIR64_R PL_reentrant_buffer->_readdir64_struct = (struct dirent64*)safemalloc(PL_reentrant_buffer->_readdir64_size); # endif /* HAS_READDIR64_R */ # ifdef HAS_SETLOCALE_R Newx(PL_reentrant_buffer->_setlocale_buffer, PL_reentrant_buffer->_setlocale_size, char); # endif /* HAS_SETLOCALE_R */ # ifdef HAS_STRERROR_R Newx(PL_reentrant_buffer->_strerror_buffer, PL_reentrant_buffer->_strerror_size, char); # endif /* HAS_STRERROR_R */ # ifdef HAS_TTYNAME_R Newx(PL_reentrant_buffer->_ttyname_buffer, PL_reentrant_buffer->_ttyname_size, char); # endif /* HAS_TTYNAME_R */ #endif /* USE_REENTRANT_API */ } void Perl_reentrant_free(pTHX) { PERL_UNUSED_CONTEXT; /* Tear down */ #ifdef USE_REENTRANT_API # ifdef HAS_ASCTIME_R Safefree(PL_reentrant_buffer->_asctime_buffer); # endif /* HAS_ASCTIME_R */ # ifdef HAS_CRYPT_R # if CRYPT_R_PROTO != REENTRANT_PROTO_B_CCD Safefree(PL_reentrant_buffer->_crypt_struct_buffer); # endif # endif /* HAS_CRYPT_R */ # ifdef HAS_CTIME_R Safefree(PL_reentrant_buffer->_ctime_buffer); # endif /* HAS_CTIME_R */ # ifdef HAS_GETGRNAM_R Safefree(PL_reentrant_buffer->_grent_buffer); # endif /* HAS_GETGRNAM_R */ # ifdef HAS_GETHOSTBYNAME_R # if !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD) Safefree(PL_reentrant_buffer->_hostent_buffer); # endif # endif /* HAS_GETHOSTBYNAME_R */ # ifdef HAS_GETLOGIN_R Safefree(PL_reentrant_buffer->_getlogin_buffer); # endif /* HAS_GETLOGIN_R */ # ifdef HAS_GETNETBYNAME_R # if !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD) Safefree(PL_reentrant_buffer->_netent_buffer); # endif # endif /* HAS_GETNETBYNAME_R */ # ifdef HAS_GETPROTOBYNAME_R # if !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD) Safefree(PL_reentrant_buffer->_protoent_buffer); # endif # endif /* HAS_GETPROTOBYNAME_R */ # ifdef HAS_GETPWNAM_R Safefree(PL_reentrant_buffer->_pwent_buffer); # endif /* HAS_GETPWNAM_R */ # ifdef HAS_GETSERVBYNAME_R # if !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD) Safefree(PL_reentrant_buffer->_servent_buffer); # endif # endif /* HAS_GETSERVBYNAME_R */ # ifdef HAS_GETSPNAM_R Safefree(PL_reentrant_buffer->_spent_buffer); # endif /* HAS_GETSPNAM_R */ # ifdef HAS_GMTIME_R # endif /* HAS_GMTIME_R */ # ifdef HAS_LOCALTIME_R # endif /* HAS_LOCALTIME_R */ # ifdef HAS_READDIR_R Safefree(PL_reentrant_buffer->_readdir_struct); # endif /* HAS_READDIR_R */ # ifdef HAS_READDIR64_R Safefree(PL_reentrant_buffer->_readdir64_struct); # endif /* HAS_READDIR64_R */ # ifdef HAS_SETLOCALE_R Safefree(PL_reentrant_buffer->_setlocale_buffer); # endif /* HAS_SETLOCALE_R */ # ifdef HAS_STRERROR_R Safefree(PL_reentrant_buffer->_strerror_buffer); # endif /* HAS_STRERROR_R */ # ifdef HAS_TTYNAME_R Safefree(PL_reentrant_buffer->_ttyname_buffer); # endif /* HAS_TTYNAME_R */ Safefree(PL_reentrant_buffer); #endif /* USE_REENTRANT_API */ } void* Perl_reentrant_retry(const char *f, ...) { /* This function is set up to be called if the normal function returns * failure with errno ERANGE, which indicates the buffer is too small. * This function calls the failing one again with a larger buffer. * * What has happened is that, due to the magic of C preprocessor macro * expansion, when the original code called function 'foo(args)', it was * instead compiled into something like a call of 'foo_r(args, buffer)' * Below we retry with 'foo', but the preprocessor has changed that into * 'foo_r', so this function will end up calling itself recursively, each * time with a larger buffer. If PERL_REENTRANT_MAXSIZE is defined, it * won't increase beyond that, instead failing. */ void *retptr = NULL; va_list ap; I32 key = 0; #ifdef USE_REENTRANT_API dTHX; key = Perl_keyword (aTHX_ f, strlen(f), FALSE /* not feature enabled */); /* Easier to special case this here than in embed.pl. (Look at what it generates for proto.h) */ PERL_ARGS_ASSERT_REENTRANT_RETRY; #endif if (key == 0) { #ifdef HAS_GETSPNAM_R /* This is a #define as has no corresponding keyword */ if (strEQ(f, "getspnam")) { key = KEY_getspnam; } #endif } else if (key < 0) { key = -key; } va_start(ap, f); #ifdef USE_REENTRANT_API switch (key) { # ifdef USE_HOSTENT_BUFFER case KEY_gethostbyaddr: case KEY_gethostbyname: case KEY_endhostent: { char * host_addr; Size_t asize; char * host_name; int anint; # ifdef PERL_REENTRANT_MAXSIZE if (PL_reentrant_buffer->_hostent_size <= PERL_REENTRANT_MAXSIZE / 2) # endif RenewDouble(PL_reentrant_buffer->_hostent_buffer, &PL_reentrant_buffer->_hostent_size, char); switch (key) { case KEY_gethostbyaddr: host_addr = va_arg(ap, char *); asize = va_arg(ap, Size_t); anint = va_arg(ap, int); /* socklen_t is what Posix 2001 says this should be */ retptr = gethostbyaddr(host_addr, (socklen_t) asize, anint); break; case KEY_gethostbyname: host_name = va_arg(ap, char *); retptr = gethostbyname(host_name); break; case KEY_endhostent: retptr = gethostent(); break; default: SETERRNO(ERANGE, LIB_INVARG); break; } } break; # endif # ifdef USE_GRENT_BUFFER case KEY_getgrent: case KEY_getgrgid: case KEY_getgrnam: { char * name; Gid_t gid; # ifdef PERL_REENTRANT_MAXSIZE if (PL_reentrant_buffer->_grent_size <= PERL_REENTRANT_MAXSIZE / 2) # endif RenewDouble(PL_reentrant_buffer->_grent_buffer, &PL_reentrant_buffer->_grent_size, char); switch (key) { case KEY_getgrnam: name = va_arg(ap, char *); retptr = getgrnam(name); break; case KEY_getgrgid: # if Gid_t_size < INTSIZE gid = (Gid_t)va_arg(ap, int); # else gid = va_arg(ap, Gid_t); # endif retptr = getgrgid(gid); break; case KEY_getgrent: retptr = getgrent(); break; default: SETERRNO(ERANGE, LIB_INVARG); break; } } break; # endif # ifdef USE_NETENT_BUFFER case KEY_getnetbyaddr: case KEY_getnetbyname: case KEY_getnetent: { char * name; Netdb_net_t net; int anint; # ifdef PERL_REENTRANT_MAXSIZE if (PL_reentrant_buffer->_netent_size <= PERL_REENTRANT_MAXSIZE / 2) # endif RenewDouble(PL_reentrant_buffer->_netent_buffer, &PL_reentrant_buffer->_netent_size, char); switch (key) { case KEY_getnetbyaddr: net = va_arg(ap, Netdb_net_t); anint = va_arg(ap, int); retptr = getnetbyaddr(net, anint); break; case KEY_getnetbyname: name = va_arg(ap, char *); retptr = getnetbyname(name); break; case KEY_getnetent: retptr = getnetent(); break; default: SETERRNO(ERANGE, LIB_INVARG); break; } } break; # endif # ifdef USE_PWENT_BUFFER case KEY_getpwnam: case KEY_getpwuid: case KEY_getpwent: { Uid_t uid; char * name; # ifdef PERL_REENTRANT_MAXSIZE if (PL_reentrant_buffer->_pwent_size <= PERL_REENTRANT_MAXSIZE / 2) # endif RenewDouble(PL_reentrant_buffer->_pwent_buffer, &PL_reentrant_buffer->_pwent_size, char); switch (key) { case KEY_getpwnam: name = va_arg(ap, char *); retptr = getpwnam(name); break; case KEY_getpwuid: # if Uid_t_size < INTSIZE uid = (Uid_t)va_arg(ap, int); # else uid = va_arg(ap, Uid_t); # endif retptr = getpwuid(uid); break; # if defined(HAS_GETPWENT) || defined(HAS_GETPWENT_R) case KEY_getpwent: retptr = getpwent(); break; # endif default: SETERRNO(ERANGE, LIB_INVARG); break; } } break; # endif # ifdef USE_SPENT_BUFFER case KEY_getspnam: { char * name; # ifdef PERL_REENTRANT_MAXSIZE if (PL_reentrant_buffer->_spent_size <= PERL_REENTRANT_MAXSIZE / 2) # endif RenewDouble(PL_reentrant_buffer->_spent_buffer, &PL_reentrant_buffer->_spent_size, char); switch (key) { case KEY_getspnam: name = va_arg(ap, char *); retptr = getspnam(name); break; default: SETERRNO(ERANGE, LIB_INVARG); break; } } break; # endif # ifdef USE_PROTOENT_BUFFER case KEY_getprotobyname: case KEY_getprotobynumber: case KEY_getprotoent: { char * name; int anint; # ifdef PERL_REENTRANT_MAXSIZE if (PL_reentrant_buffer->_protoent_size <= PERL_REENTRANT_MAXSIZE / 2) # endif RenewDouble(PL_reentrant_buffer->_protoent_buffer, &PL_reentrant_buffer->_protoent_size, char); switch (key) { case KEY_getprotobyname: name = va_arg(ap, char *); retptr = getprotobyname(name); break; case KEY_getprotobynumber: anint = va_arg(ap, int); retptr = getprotobynumber(anint); break; case KEY_getprotoent: retptr = getprotoent(); break; default: SETERRNO(ERANGE, LIB_INVARG); break; } } break; # endif # ifdef USE_SERVENT_BUFFER case KEY_getservbyname: case KEY_getservbyport: case KEY_getservent: { char * name; char * proto; int anint; # ifdef PERL_REENTRANT_MAXSIZE if (PL_reentrant_buffer->_servent_size <= PERL_REENTRANT_MAXSIZE / 2) # endif RenewDouble(PL_reentrant_buffer->_servent_buffer, &PL_reentrant_buffer->_servent_size, char); switch (key) { case KEY_getservbyname: name = va_arg(ap, char *); proto = va_arg(ap, char *); retptr = getservbyname(name, proto); break; case KEY_getservbyport: anint = va_arg(ap, int); name = va_arg(ap, char *); retptr = getservbyport(anint, name); break; case KEY_getservent: retptr = getservent(); break; default: SETERRNO(ERANGE, LIB_INVARG); break; } } break; # endif default: /* Not known how to retry, so just fail. */ break; } #else PERL_UNUSED_ARG(f); #endif va_end(ap); return retptr; } /* ex: set ro: */