出现以下error: src/os/unix/ngx_process_cycle.c: In function‘ngx_start_worker_processes’: src/os/unix/ngx_process_cycle.c:388:5: error: ignoring return value of‘ftruncate’, declared with attribute warn_unused_result [-Werror=unused-result] (void) ftruncate(shm_fd, sizeof(sem_t));...
问android源代码构建失败:未声明的标识符'ftruncate‘EN最近在研究写一个棋牌客户端对接网狐的服务器，...
AI代码解释 #include<stdio.h>#include<stdlib.h>#include<unistd.h>#include<sys/types.h>#include<sys/stat.h>#include<fcntl.h>intmain(void){int fd;/* 打开 file1 文件 */if((fd=open("./file1",O_RDWR))<0){perror("open error");exit(EXIT_FAILURE);}/* 使用 ftruncate 将 file1 文件...
问题:Linux ftruncate64() 修改文件大小,执行无错误,但只能指定文件到1GB大小。 测试代码: 1#define_LARGEFILE_SOURCE2#define_LARGEFILE64_SOURCE3#define_FILE_OFFSET_BITS 6445#include <sys/types.h>6#include <sys/stst.h>7#include <fcntl.h>8#include <unistd.h>910intmain(){11intfd;12__off64_t...
aio_error(3C) aio_fsync(3C) aio_read(3C) aio_return(3C) aio_suspend(3C) aio_waitn(3C) aio_write(3C) aiocancel(3C) aioread(3C) aiowait(3C) aiowrite(3C) alloca(3C) alphasort(3C) ascftime(3C) asctime(3C) asctime_r(3C) asprintf(3C) assert(3C) atexit(3C) atof(3C) atoi(3C) at...
() error"); else if ((fd = creat(fn, S_IWUSR)) < 0) perror("creat() error"); else { memset(mega_string, '0', string_len); if ((ret = write(fd, mega_string, string_len)) == -1) perror("write() error"); else { printf("write() wrote %d bytes\n", ret); fstat(...
So I wrote my own function and added it to the VFS via the `.truncate_p` entry. However, when I compile, the linker throws the following error… Code:Select all undefined reference to `ftruncate' Has anyone managed to successfully implement an ftruncate() function in the `esp-littlefs`?
{ int fd; const char *s1 = "0123456789"; const char *s2 = "abcde"; fd = open("test.txt", O_CREAT | O_WRONLY | O_TRUNC, 0666); /* if error */ write(fd, s1, strlen(s1)); ftruncate(fd, 0); // lseek(fd, 0, SEEK_SET); write(fd, s2, strlen(s2)); close(fd); ...
() error"); close(fd); } } fputs("ABCDEFGHIJKLMNOPQRSTUVWXYZ",testfile); fflush(testfile); size = lseek(fd, 0, SEEK_END); printf("The file is %ld bytes long.\n", size); if (ftruncate(fd, 3) !=0) perror("ftruncate() error"); else { size = lseek(fd, 0, SEEK_END); ...
可选的请求资源,可被 eio_get_last_error() 之类的函数使用。 data Arbitrary variable passed to callback. 返回值 ¶ eio_ftruncate() returns request resource on success, 或者在失败时返回 false. 参见 ¶ eio_truncate() - Truncate a file 发现...