65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
/*
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* Copyright (C) 2011 Karel Zak <kzak@redhat.com>
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*/
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#ifndef UTIL_LINUX_SYSFS_H
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#define UTIL_LINUX_SYSFS_H
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <string.h>
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#include <inttypes.h>
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#include <dirent.h>
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struct sysfs_cxt {
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dev_t devno;
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int dir_fd; /* /sys/block/<name> */
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char *dir_path;
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struct sysfs_cxt *parent;
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};
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extern char *sysfs_devno_attribute_path(dev_t devno, char *buf,
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size_t bufsiz, const char *attr);
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extern int sysfs_devno_has_attribute(dev_t devno, const char *attr);
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extern char *sysfs_devno_path(dev_t devno, char *buf, size_t bufsiz);
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extern char *sysfs_devno_to_devpath(dev_t devno, char *buf, size_t bufsiz);
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extern dev_t sysfs_devname_to_devno(const char *name, const char *parent);
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extern int sysfs_init(struct sysfs_cxt *cxt, dev_t devno,
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struct sysfs_cxt *parent);
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extern void sysfs_deinit(struct sysfs_cxt *cxt);
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extern DIR *sysfs_opendir(struct sysfs_cxt *cxt, const char *attr);
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extern int sysfs_stat(struct sysfs_cxt *cxt, const char *attr, struct stat *st);
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extern ssize_t sysfs_readlink(struct sysfs_cxt *cxt, const char *attr,
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char *buf, size_t bufsiz);
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extern int sysfs_has_attribute(struct sysfs_cxt *cxt, const char *attr);
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extern int sysfs_scanf(struct sysfs_cxt *cxt, const char *attr,
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const char *fmt, ...)
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__attribute__ ((format (scanf, 3, 4)));
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extern int sysfs_read_s64(struct sysfs_cxt *cxt, const char *attr, int64_t *res);
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extern int sysfs_read_u64(struct sysfs_cxt *cxt, const char *attr, uint64_t *res);
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extern int sysfs_read_int(struct sysfs_cxt *cxt, const char *attr, int *res);
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extern char *sysfs_get_devname(struct sysfs_cxt *cxt, char *buf, size_t bufsiz);
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extern char *sysfs_strdup(struct sysfs_cxt *cxt, const char *attr);
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extern int sysfs_count_dirents(struct sysfs_cxt *cxt, const char *attr);
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extern int sysfs_count_partitions(struct sysfs_cxt *cxt, const char *devname);
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extern char *sysfs_get_slave(struct sysfs_cxt *cxt);
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extern int sysfs_is_partition_dirent(DIR *dir, struct dirent *d,
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const char *parent_name);
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#endif /* UTIL_LINUX_SYSFS_H */
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