#ifndef _GNU_SOURCE # define _GNU_SOURCE #endif #include #include #include #include #include #include #include #include #include #include "die.h" #include "dev.h" #include "ioops.h" #include "str.h" #include "built_in.h" int open_or_die(const char *file, int flags) { int ret = open(file, flags); if (unlikely(ret < 0)) panic("Cannot open file %s! %s.\n", file, strerror(errno)); return ret; } int open_or_die_m(const char *file, int flags, mode_t mode) { int ret = open(file, flags, mode); if (unlikely(ret < 0)) panic("Cannot open or create file %s! %s.", file, strerror(errno)); return ret; } int dup_or_die(int oldfd) { int newfd = dup(oldfd); if (unlikely(newfd < 0)) panic("Cannot dup old file descriptor!\n"); return newfd; } void dup2_or_die(int oldfd, int newfd) { int ret = dup2(oldfd, newfd); if (unlikely(ret < 0)) panic("Cannot dup2 old/new file descriptor!\n"); } void create_or_die(const char *file, mode_t mode) { int fd = open_or_die_m(file, O_WRONLY | O_CREAT, mode); close(fd); } int mkostemp_or_die(char *templ, int flags) { /* mode is 0600 (S_IRUSR | S_IWUSR) by default */ int fd = mkostemp(templ, flags); if (unlikely(fd < 0)) panic("Cannot create unique temporary file! %s\n", strerror(errno)); return fd; } void pipe_or_die(int pipefd[2], int flags) { int ret = pipe2(pipefd, flags); if (unlikely(ret < 0)) panic("Cannot create pipe2 event fd! %s.\n", strerror(errno)); } int tun_open_or_die(const char *name, int type) { int fd, ret; short flags; struct ifreq ifr; if (unlikely(!name)) panic("No name provided for tundev!\n"); fd = open_or_die("/dev/net/tun", O_RDWR); memset(&ifr, 0, sizeof(ifr)); ifr.ifr_flags = type; strlcpy(ifr.ifr_name, name, IFNAMSIZ); ret = ioctl(fd, TUNSETIFF, &ifr); if (unlikely(ret < 0)) panic("ioctl screwed up! %s.\n", strerror(errno)); ret = fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); if (unlikely(ret < 0)) panic("fctnl screwed up! %s.\n", strerror(errno)); flags = device_get_flags(name); flags |= IFF_UP | IFF_RUNNING; device_set_flags(name, flags); return fd; } ssize_t read_or_die(int fd, void *buf, size_t len) { ssize_t ret = read(fd, buf, len); if (unlikely(ret < 0)) { if (errno == EPIPE) die(); panic("Cannot read from descriptor! %s.\n", strerror(errno)); } return ret; } ssize_t write_or_die(int fd, const void *buf, size_t len) { ssize_t ret = write(fd, buf, len); if (unlikely(ret < 0)) { if (errno == EPIPE) die(); panic("Cannot write to descriptor! %s.", strerror(errno)); } return ret; } int read_blob_or_die(const char *file, void *blob, size_t count) { int fd, ret; fd = open_or_die(file, O_RDONLY); ret = read_or_die(fd, blob, count); close(fd); return ret; } int write_blob_or_die(const char *file, const void *blob, size_t count) { int fd, ret; fd = open_or_die_m(file, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR); ret = write_or_die(fd, blob, count); fdatasync(fd); close(fd); return ret; } text' onchange='this.form.submit();'>space:mode:

Diffstat (limited to 'fs/dax.c')

-rw-r--r--

1 files changed, 11 insertions, 17 deletions