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IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" %%%LICENSE_END .\" .\" @(#)fread.3 6.6 (Berkeley) 6/29/91 .\" .\" Converted for Linux, Mon Nov 29 15:37:33 1993, faith@cs.unc.edu .\" Sun Feb 19 21:26:54 1995 by faith, return values .\" Modified Thu Apr 20 20:43:53 1995 by Jim Van Zandt .\" Modified Fri May 17 10:21:51 1996 by Martin Schulze .\" .\"******************************************************************* .\" .\" This file was generated with po4a. Translate the source file. .\" .\"******************************************************************* .TH FREAD 3 "13 agosto 2020" GNU "Manual do Programador do Linux" .SH NOME fread, fwrite \- entrada/saída de fluxo binário .SH SINOPSE .nf \fB#include \fP .PP \fBsize_t fread(void *\fP\fIptr\fP\fB, size_t \fP\fIsize\fP\fB, size_t \fP\fInmemb\fP\fB, ARQUIVO *\fP\fIstream\fP\fB);\fP .PP \fBsize_t fwrite(const void *\fP\fIptr\fP\fB, size_t \fP\fIsize\fP\fB, size_t \fP\fInmemb\fP\fB,\fP \fB ARQUIVO *\fP\fIstream\fP\fB);\fP .fi .SH DESCRIÇÃO A função \fBfread\fP() lê \fInmemb\fP elementos de dados, cada um com \fIsize\fP bytes, do fluxo apontado por \fIstream\fP, armazenando\-os no local dado por \fIptr\fP. .PP A função \fBfwrite\fP() escreve \fInmemb\fP elementos de dado, cada um com \fIsize\fP bytes, no fluxo apontado por \fIstream\fP, obtendo\-os a partir do local dado por \fIptr\fP. .PP Para contrapartes não bloqueantes, veja \fBunlocked_stdio\fP(3). .SH "VALOR DE RETORNO" On success, \fBfread\fP() and \fBfwrite\fP() return the number of items read or written. This number equals the number of bytes transferred only when \fIsize\fP is 1. If an error occurs, or the end of the file is reached, the return value is a short item count (or zero). .PP The file position indicator for the stream is advanced by the number of bytes successfully read or written. .PP \fBfread\fP() nãi distingue entre fim de arquivo e erro, e os chamadores precisam usar \fBfeof\fP(3) e \fBferror\fP(3) para determinar o que ocorreu. .SH ATRIBUTOS Para uma explicação dos termos usados nesta seção, consulte \fBattributes\fP(7). .TS allbox; lbw17 lb lb l l l. Interface Atributo Valor T{ \fBfread\fP(), \fBfwrite\fP() T} Thread safety MT\-Safe .TE .SH "DE ACORDO COM" POSIX.1\-2001, POSIX.1\-2008, C89. .SH EXEMPLOS The program below demonstrates the use of \fBfread\fP() by parsing /bin/sh ELF executable in binary mode and printing its magic and class: .PP .in +4n .EX $ \fB./a.out\fP ELF magic: 0x7f454c46 Class: 0x02 .EE .in .SS "Fonte do programa" \& .EX #include #include #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) int main(void) { FILE *fp = fopen("/bin/sh", "rb"); if (!fp) { perror("fopen"); return EXIT_FAILURE; } unsigned char buffer[4]; size_t ret = fread(buffer, ARRAY_SIZE(buffer), sizeof(*buffer), fp); if (ret != sizeof(*buffer)) { fprintf(stderr, "fread() failed: %zu\en", ret); exit(EXIT_FAILURE); } printf("ELF magic: %#04x%02x%02x%02x\en", buffer[0], buffer[1], buffer[2], buffer[3]); ret = fread(buffer, 1, 1, fp); if (ret != 1) { fprintf(stderr, "fread() failed: %zu\en", ret); exit(EXIT_FAILURE); } printf("Class: %#04x\en", buffer[0]); fclose(fp); exit(EXIT_SUCCESS); } .EE .SH "VEJA TAMBÉM" \fBread\fP(2), \fBwrite\fP(2), \fBfeof\fP(3), \fBferror\fP(3), \fBunlocked_stdio\fP(3) .SH COLOFÃO Esta página faz parte da versão 5.10 do projeto Linux \fIman\-pages\fP. Uma descrição do projeto, informações sobre relatórios de bugs e a versão mais recente desta página podem ser encontradas em \%https://www.kernel.org/doc/man\-pages/. .PP .SH TRADUÇÃO A tradução para português brasileiro desta página man foi criada por Rubens de Jesus Nogueira e André Luiz Fassone . .PP Esta tradução é uma documentação livre; leia a .UR https://www.gnu.org/licenses/gpl-3.0.html Licença Pública Geral GNU Versão 3 .UE ou posterior para as condições de direitos autorais. Nenhuma responsabilidade é aceita. .PP Se você encontrar algum erro na tradução desta página de manual, envie um e-mail para .MT debian-l10n-portuguese@lists.debian.org a lista de discussão de tradutores .ME .