diff options
| -rw-r--r-- | src/basic/fd-util.c | 8 | ||||
| -rw-r--r-- | src/basic/fd-util.h | 10 |
2 files changed, 18 insertions, 0 deletions
diff --git a/src/basic/fd-util.c b/src/basic/fd-util.c index f2b606ea9b..32289cfd09 100644 --- a/src/basic/fd-util.c +++ b/src/basic/fd-util.c @@ -988,3 +988,11 @@ const char *accmode_to_string(int flags) { return NULL; } } + +char *format_proc_pid_fd_path(char buf[static PROC_PID_FD_PATH_MAX], pid_t pid, int fd) { + assert(buf); + assert(fd >= 0); + assert(pid >= 0); + assert_se(snprintf_ok(buf, PROC_PID_FD_PATH_MAX, "/proc/" PID_FMT "/fd/%i", pid == 0 ? getpid_cached() : pid, fd)); + return buf; +} diff --git a/src/basic/fd-util.h b/src/basic/fd-util.h index aba8f5f5af..5061e32196 100644 --- a/src/basic/fd-util.h +++ b/src/basic/fd-util.h @@ -131,6 +131,16 @@ static inline char *format_proc_fd_path(char buf[static PROC_FD_PATH_MAX], int f #define FORMAT_PROC_FD_PATH(fd) \ format_proc_fd_path((char[PROC_FD_PATH_MAX]) {}, (fd)) +/* The maximum length a buffer for a /proc/<pid>/fd/<fd> path needs */ +#define PROC_PID_FD_PATH_MAX \ + (STRLEN("/proc//fd/") + DECIMAL_STR_MAX(pid_t) + DECIMAL_STR_MAX(int)) + +char *format_proc_pid_fd_path(char buf[static PROC_PID_FD_PATH_MAX], pid_t pid, int fd); + +/* Kinda the same as FORMAT_PROC_FD_PATH(), but goes by PID rather than "self" symlink */ +#define FORMAT_PROC_PID_FD_PATH(pid, fd) \ + format_proc_pid_fd_path((char[PROC_PID_FD_PATH_MAX]) {}, (pid), (fd)) + const char *accmode_to_string(int flags); /* Like ASSERT_PTR, but for fds */ |