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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) *//* * Lightweight directory reading library. */#ifndef __API_IO_DIR__#define __API_IO_DIR__
#include <dirent.h>#include <fcntl.h>#include <stdlib.h>#include <unistd.h>#include <sys/stat.h>#include <sys/syscall.h>#include <linux/limits.h>
#if !defined(SYS_getdents64)#if defined(__x86_64__) || defined(__arm__) #define SYS_getdents64 217#elif defined(__i386__) || defined(__s390x__) || defined(__sh__) #define SYS_getdents64 220#elif defined(__alpha__) #define SYS_getdents64 377#elif defined(__mips__) #define SYS_getdents64 308#elif defined(__powerpc64__) || defined(__powerpc__) #define SYS_getdents64 202#elif defined(__sparc64__) || defined(__sparc__) #define SYS_getdents64 154#elif defined(__xtensa__) #define SYS_getdents64 60#else #define SYS_getdents64 61#endif#endif /* !defined(SYS_getdents64) */
static inline ssize_t perf_getdents64(int fd, void *dirp, size_t count){#ifdef MEMORY_SANITIZER memset(dirp, 0, count);#endif return syscall(SYS_getdents64, fd, dirp, count);}
struct io_dirent64 { ino64_t d_ino; /* 64-bit inode number */ off64_t d_off; /* 64-bit offset to next structure */ unsigned short d_reclen; /* Size of this dirent */ unsigned char d_type; /* File type */ char d_name[NAME_MAX + 1]; /* Filename (null-terminated) */};
struct io_dir { int dirfd; ssize_t available_bytes; struct io_dirent64 *next; struct io_dirent64 buff[4];};
static inline void io_dir__init(struct io_dir *iod, int dirfd){ iod->dirfd = dirfd; iod->available_bytes = 0;}
static inline void io_dir__rewinddir(struct io_dir *iod){ lseek(iod->dirfd, 0, SEEK_SET); iod->available_bytes = 0;}
static inline struct io_dirent64 *io_dir__readdir(struct io_dir *iod){ struct io_dirent64 *entry;
if (iod->available_bytes <= 0) { ssize_t rc = perf_getdents64(iod->dirfd, iod->buff, sizeof(iod->buff));
if (rc <= 0) return NULL; iod->available_bytes = rc; iod->next = iod->buff; } entry = iod->next; iod->next = (struct io_dirent64 *)((char *)entry + entry->d_reclen); iod->available_bytes -= entry->d_reclen; return entry;}
static inline bool io_dir__is_dir(const struct io_dir *iod, struct io_dirent64 *dent){ if (dent->d_type == DT_UNKNOWN) { struct stat st;
if (fstatat(iod->dirfd, dent->d_name, &st, /*flags=*/0)) return false;
if (S_ISDIR(st.st_mode)) { dent->d_type = DT_DIR; return true; } } return dent->d_type == DT_DIR;}
#endif /* __API_IO_DIR__ */