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libmisc/proc-self-fd.h
31 строка
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Andreas Gruenbacher
Add xattrat syscall backwards compatibility code
23 июн 2026, 14:36
23 июн 2026, 14:36
ea0b56c
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#ifndef MISC_XATTRAT_COMPAT_H #define MISC_XATTRAT_COMPAT_H #include <limits.h> #include "include/visibility-hidden.h" /* * The maximum number of decimal digits of an N-bit number is * ceil(N * log10(2)), with log10(2) being approx. 0.30103. We * use 31/100 as a safe and close enough approximation; the * overshoot even for 128-bit numbers is only one byte. */ #define TYPE_BITS(type) (sizeof(type) * CHAR_BIT) #define DECIMAL_DIGITS(type) ((TYPE_BITS(type) * 31 + 99) / 100) struct proc_self_fd_buffer { char buffer[sizeof("/proc/self/fd/") + /* sign */ 1 + DECIMAL_DIGITS(int)]; }; hidden char *proc_self_fd_path(int fd, struct proc_self_fd_buffer *buffer); hidden void proc_self_fd_free(char *path, struct proc_self_fd_buffer *buffer); hidden extern int slow_empty_paths; hidden char *proc_self_fd_realpath(int dirfd, const char *path, int *at_flags, struct proc_self_fd_buffer *buffer); hidden int openat_with_flags(int dirfd, const char *path, int at_flags); hidden int need_slow_empty_paths(int dirfd, const char *path); #endif /* MISC_XATTRAT_COMPAT_H */