diff options
Diffstat (limited to 'erts')
| -rw-r--r-- | erts/emulator/sys/unix/sys.c | 26 | ||||
| -rw-r--r-- | erts/lib_src/common/erl_printf.c | 45 |
2 files changed, 54 insertions, 17 deletions
diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c index 5de0c281c4..47acd132ca 100644 --- a/erts/emulator/sys/unix/sys.c +++ b/erts/emulator/sys/unix/sys.c @@ -86,6 +86,14 @@ static erts_smp_rwmtx_t environ_rwmtx; #define DISABLE_VFORK 0 #endif +#if defined IOV_MAX +#define MAXIOV IOV_MAX +#elif defined UIO_MAXIOV +#define MAXIOV UIO_MAXIOV +#else +#define MAXIOV 16 +#endif + #ifdef USE_THREADS # ifdef ENABLE_CHILD_WAITER_THREAD # define CHLDWTHR ENABLE_CHILD_WAITER_THREAD @@ -2524,32 +2532,28 @@ fd_async(void *async_data) SysIOVec *iov0; SysIOVec *iov; int iovlen; - int iovcnt; - int p; + int err; /* much of this code is stolen from efile_drv:invoke_writev */ driver_pdl_lock(dd->blocking->pdl); iov0 = driver_peekq(dd->port_num, &iovlen); - /* Calculate iovcnt */ - for (p = 0, iovcnt = 0; iovcnt < iovlen; - p += iov0[iovcnt++].iov_len) - ; + iovlen = iovlen < MAXIOV ? iovlen : MAXIOV; iov = erts_alloc_fnf(ERTS_ALC_T_SYS_WRITE_BUF, - sizeof(SysIOVec)*iovcnt); + sizeof(SysIOVec)*iovlen); if (!iov) { res = -1; - errno = ENOMEM; - erts_free(ERTS_ALC_T_SYS_WRITE_BUF, iov); + err = ENOMEM; driver_pdl_unlock(dd->blocking->pdl); } else { - memcpy(iov,iov0,iovcnt*sizeof(SysIOVec)); + memcpy(iov,iov0,iovlen*sizeof(SysIOVec)); driver_pdl_unlock(dd->blocking->pdl); res = writev(dd->ofd, iov, iovlen); + err = errno; erts_free(ERTS_ALC_T_SYS_WRITE_BUF, iov); } dd->blocking->res = res; - dd->blocking->err = errno; + dd->blocking->err = err; } void fd_ready_async(ErlDrvData drv_data, diff --git a/erts/lib_src/common/erl_printf.c b/erts/lib_src/common/erl_printf.c index 2c177ee5ac..0a0346ac2d 100644 --- a/erts/lib_src/common/erl_printf.c +++ b/erts/lib_src/common/erl_printf.c @@ -87,6 +87,39 @@ void (*erts_printf_unblock_fpe)(int) = NULL; # define FWRITE fwrite #endif +/* We use write for stdout and stderr as they could be + set to non-blocking by shell drivers, and non-blocking + FILE * functions work unpredictably as best */ +static int +printf_putc(int c, FILE *stream) { + if ((FILE*)stream == stdout || (FILE*)stream == stderr) { + int fd = stream == stdout ? fileno(stdout) : fileno(stdin); + int res; + do { + res = write(fd,&c,1); + } while (res == -1 && (errno == EAGAIN || errno == EINTR)); + if (res == -1) return EOF; + return res; + } + + return PUTC(c, stream); +} + +static size_t +printf_fwrite(const void *ptr, size_t size, size_t nitems, + FILE *stream) { + if ((FILE*)stream == stdout || (FILE*)stream == stderr) { + int fd = stream == stdout ? fileno(stdout) : fileno(stdin); + int res; + do { + res = write(fd, ptr, size*nitems); + } while (res == -1 && (errno == EAGAIN || errno == EINTR)); + if (res == -1) return 0; + return res; + } + return FWRITE(ptr, size, nitems, stream); +} + static int get_error_result(void) { @@ -103,10 +136,10 @@ write_f_add_cr(void *vfp, char* buf, size_t len) size_t i; ASSERT(vfp); for (i = 0; i < len; i++) { - if (buf[i] == '\n' && PUTC('\r', (FILE *) vfp) == EOF) - return get_error_result(); - if (PUTC(buf[i], (FILE *) vfp) == EOF) - return get_error_result(); + if (buf[i] == '\n' && printf_putc('\r', (FILE *) vfp) == EOF) + return get_error_result(); + if (printf_putc(buf[i], (FILE *) vfp) == EOF) + return get_error_result(); } return len; } @@ -119,12 +152,12 @@ write_f(void *vfp, char* buf, size_t len) if (len <= 64) { /* Try to optimize writes of small bufs. */ int i; for (i = 0; i < len; i++) - if (PUTC(buf[i], (FILE *) vfp) == EOF) + if (printf_putc(buf[i], (FILE *) vfp) == EOF) return get_error_result(); } else #endif - if (FWRITE((void *) buf, sizeof(char), len, (FILE *) vfp) != len) + if (printf_fwrite((void *) buf, sizeof(char), len, (FILE *) vfp) != len) return get_error_result(); return len; } |