#include "perliol.h"
-#ifdef HAS_MMAP
-#include <sys/mman.h>
-#endif
-
void
PerlIO_debug(const char *fmt, ...)
{
dSYS;
va_start(ap, fmt);
if (!PL_perlio_debug_fd) {
- if (!PL_tainting && PL_uid == PL_euid && PL_gid == PL_egid) {
+ if (!PL_tainting &&
+ PerlProc_getuid() == PerlProc_geteuid() &&
+ PerlProc_getgid() == PerlProc_getegid()) {
const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
if (s && *s)
PL_perlio_debug_fd
PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
-#ifdef HAS_MMAP
- PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
-#endif
PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
PerlIOCrlf_set_ptrcnt,
};
-#ifdef HAS_MMAP
-/*--------------------------------------------------------------------------------------*/
-/*
- * mmap as "buffer" layer
- */
-
-typedef struct {
- PerlIOBuf base; /* PerlIOBuf stuff */
- Mmap_t mptr; /* Mapped address */
- Size_t len; /* mapped length */
- STDCHAR *bbuf; /* malloced buffer if map fails */
-} PerlIOMmap;
-
-IV
-PerlIOMmap_map(pTHX_ PerlIO *f)
-{
- dVAR;
- PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
- const IV flags = PerlIOBase(f)->flags;
- IV code = 0;
- if (m->len)
- abort();
- if (flags & PERLIO_F_CANREAD) {
- PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
- const int fd = PerlIO_fileno(f);
- Stat_t st;
- code = Fstat(fd, &st);
- if (code == 0 && S_ISREG(st.st_mode)) {
- SSize_t len = st.st_size - b->posn;
- if (len > 0) {
- Off_t posn;
- if (PL_mmap_page_size <= 0)
- Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
- PL_mmap_page_size);
- if (b->posn < 0) {
- /*
- * This is a hack - should never happen - open should
- * have set it !
- */
- b->posn = PerlIO_tell(PerlIONext(f));
- }
- posn = (b->posn / PL_mmap_page_size) * PL_mmap_page_size;
- len = st.st_size - posn;
- m->mptr = (Mmap_t)mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
- if (m->mptr && m->mptr != (Mmap_t) - 1) {
-#if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
- madvise(m->mptr, len, MADV_SEQUENTIAL);
-#endif
-#if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
- madvise(m->mptr, len, MADV_WILLNEED);
-#endif
- PerlIOBase(f)->flags =
- (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
- b->end = ((STDCHAR *) m->mptr) + len;
- b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
- b->ptr = b->buf;
- m->len = len;
- }
- else {
- b->buf = NULL;
- }
- }
- else {
- PerlIOBase(f)->flags =
- flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
- b->buf = NULL;
- b->ptr = b->end = b->ptr;
- code = -1;
- }
- }
- }
- return code;
-}
-
-IV
-PerlIOMmap_unmap(pTHX_ PerlIO *f)
-{
- PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
- IV code = 0;
- if (m->len) {
- PerlIOBuf * const b = &m->base;
- if (b->buf) {
- /* The munmap address argument is tricky: depending on the
- * standard it is either "void *" or "caddr_t" (which is
- * usually "char *" (signed or unsigned). If we cast it
- * to "void *", those that have it caddr_t and an uptight
- * C++ compiler, will freak out. But casting it as char*
- * should work. Maybe. (Using Mmap_t figured out by
- * Configure doesn't always work, apparently.) */
- code = munmap((char*)m->mptr, m->len);
- b->buf = NULL;
- m->len = 0;
- m->mptr = NULL;
- if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
- code = -1;
- }
- b->ptr = b->end = b->buf;
- PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
- }
- return code;
-}
-
-STDCHAR *
-PerlIOMmap_get_base(pTHX_ PerlIO *f)
-{
- PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
- PerlIOBuf * const b = &m->base;
- if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
- /*
- * Already have a readbuffer in progress
- */
- return b->buf;
- }
- if (b->buf) {
- /*
- * We have a write buffer or flushed PerlIOBuf read buffer
- */
- m->bbuf = b->buf; /* save it in case we need it again */
- b->buf = NULL; /* Clear to trigger below */
- }
- if (!b->buf) {
- PerlIOMmap_map(aTHX_ f); /* Try and map it */
- if (!b->buf) {
- /*
- * Map did not work - recover PerlIOBuf buffer if we have one
- */
- b->buf = m->bbuf;
- }
- }
- b->ptr = b->end = b->buf;
- if (b->buf)
- return b->buf;
- return PerlIOBuf_get_base(aTHX_ f);
-}
-
-SSize_t
-PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
-{
- PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
- PerlIOBuf * const b = &m->base;
- if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
- PerlIO_flush(f);
- if (b->ptr && (b->ptr - count) >= b->buf
- && memEQ(b->ptr - count, vbuf, count)) {
- b->ptr -= count;
- PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
- return count;
- }
- if (m->len) {
- /*
- * Loose the unwritable mapped buffer
- */
- PerlIO_flush(f);
- /*
- * If flush took the "buffer" see if we have one from before
- */
- if (!b->buf && m->bbuf)
- b->buf = m->bbuf;
- if (!b->buf) {
- PerlIOBuf_get_base(aTHX_ f);
- m->bbuf = b->buf;
- }
- }
- return PerlIOBuf_unread(aTHX_ f, vbuf, count);
-}
-
-SSize_t
-PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
-{
- PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
- PerlIOBuf * const b = &m->base;
-
- if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
- /*
- * No, or wrong sort of, buffer
- */
- if (m->len) {
- if (PerlIOMmap_unmap(aTHX_ f) != 0)
- return 0;
- }
- /*
- * If unmap took the "buffer" see if we have one from before
- */
- if (!b->buf && m->bbuf)
- b->buf = m->bbuf;
- if (!b->buf) {
- PerlIOBuf_get_base(aTHX_ f);
- m->bbuf = b->buf;
- }
- }
- return PerlIOBuf_write(aTHX_ f, vbuf, count);
-}
-
-IV
-PerlIOMmap_flush(pTHX_ PerlIO *f)
-{
- PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
- PerlIOBuf * const b = &m->base;
- IV code = PerlIOBuf_flush(aTHX_ f);
- /*
- * Now we are "synced" at PerlIOBuf level
- */
- if (b->buf) {
- if (m->len) {
- /*
- * Unmap the buffer
- */
- if (PerlIOMmap_unmap(aTHX_ f) != 0)
- code = -1;
- }
- else {
- /*
- * We seem to have a PerlIOBuf buffer which was not mapped
- * remember it in case we need one later
- */
- m->bbuf = b->buf;
- }
- }
- return code;
-}
-
-IV
-PerlIOMmap_fill(pTHX_ PerlIO *f)
-{
- PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
- IV code = PerlIO_flush(f);
- if (code == 0 && !b->buf) {
- code = PerlIOMmap_map(aTHX_ f);
- }
- if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
- code = PerlIOBuf_fill(aTHX_ f);
- }
- return code;
-}
-
-IV
-PerlIOMmap_close(pTHX_ PerlIO *f)
-{
- PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
- PerlIOBuf * const b = &m->base;
- IV code = PerlIO_flush(f);
- if (m->bbuf) {
- b->buf = m->bbuf;
- m->bbuf = NULL;
- b->ptr = b->end = b->buf;
- }
- if (PerlIOBuf_close(aTHX_ f) != 0)
- code = -1;
- return code;
-}
-
-PerlIO *
-PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
-{
- return PerlIOBase_dup(aTHX_ f, o, param, flags);
-}
-
-
-PERLIO_FUNCS_DECL(PerlIO_mmap) = {
- sizeof(PerlIO_funcs),
- "mmap",
- sizeof(PerlIOMmap),
- PERLIO_K_BUFFERED|PERLIO_K_RAW,
- PerlIOBuf_pushed,
- PerlIOBuf_popped,
- PerlIOBuf_open,
- PerlIOBase_binmode, /* binmode */
- NULL,
- PerlIOBase_fileno,
- PerlIOMmap_dup,
- PerlIOBuf_read,
- PerlIOMmap_unread,
- PerlIOMmap_write,
- PerlIOBuf_seek,
- PerlIOBuf_tell,
- PerlIOBuf_close,
- PerlIOMmap_flush,
- PerlIOMmap_fill,
- PerlIOBase_eof,
- PerlIOBase_error,
- PerlIOBase_clearerr,
- PerlIOBase_setlinebuf,
- PerlIOMmap_get_base,
- PerlIOBuf_bufsiz,
- PerlIOBuf_get_ptr,
- PerlIOBuf_get_cnt,
- PerlIOBuf_set_ptrcnt,
-};
-
-#endif /* HAS_MMAP */
-
PerlIO *
Perl_PerlIO_stdin(pTHX)
{
https://perl5.git.perl.org / perl5.git / blobdiff