Date: Wed, 14 Nov 2018 00:21:49 +0000 (UTC) From: Conrad Meyer <cem@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r340421 - head/usr.sbin/cpucontrol Message-ID: <201811140021.wAE0LnWL008210@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: cem Date: Wed Nov 14 00:21:49 2018 New Revision: 340421 URL: https://svnweb.freebsd.org/changeset/base/340421 Log: cpucontrol(8): De-duplicate common update logic Every µcode-updater must open the cpucontrol devfs node RDWR, open a firmware file, validate the FW file has a positive length, mmap it, etc. De-duplicate that identical logic between every individual platform. Also, constify references to the readonly-mapped firmware files while here. Sponsored by: Dell EMC Isilon Modified: head/usr.sbin/cpucontrol/amd.c head/usr.sbin/cpucontrol/amd10h.c head/usr.sbin/cpucontrol/cpucontrol.c head/usr.sbin/cpucontrol/cpucontrol.h head/usr.sbin/cpucontrol/intel.c head/usr.sbin/cpucontrol/via.c Modified: head/usr.sbin/cpucontrol/amd.c ============================================================================== --- head/usr.sbin/cpucontrol/amd.c Wed Nov 14 00:12:04 2018 (r340420) +++ head/usr.sbin/cpucontrol/amd.c Wed Nov 14 00:21:49 2018 (r340421) @@ -73,16 +73,16 @@ amd_probe(int fd) } void -amd_update(const char *dev, const char *path) +amd_update(const struct ucode_update_params *params) { - int fd, devfd; + int devfd; unsigned int i; - struct stat st; - uint32_t *fw_image; - amd_fw_header_t *fw_header; + const char *dev, *path; + const uint32_t *fw_image; + const amd_fw_header_t *fw_header; uint32_t sum; uint32_t signature; - uint32_t *fw_data; + const uint32_t *fw_data; size_t fw_size; cpuctl_cpuid_args_t idargs = { .level = 1, /* Request signature. */ @@ -90,16 +90,14 @@ amd_update(const char *dev, const char *path) cpuctl_update_args_t args; int error; + dev = params->dev_path; + path = params->fw_path; + devfd = params->devfd; + fw_image = params->fwimage; + assert(path); assert(dev); - fd = -1; - fw_image = MAP_FAILED; - devfd = open(dev, O_RDWR); - if (devfd < 0) { - WARN(0, "could not open %s for writing", dev); - return; - } error = ioctl(devfd, CPUCTL_CPUID, &idargs); if (error < 0) { WARN(0, "ioctl()"); @@ -115,37 +113,18 @@ amd_update(const char *dev, const char *path) /* * Open the firmware file. */ - fd = open(path, O_RDONLY, 0); - if (fd < 0) { - WARN(0, "open(%s)", path); - goto fail; - } - error = fstat(fd, &st); - if (error != 0) { - WARN(0, "fstat(%s)", path); - goto fail; - } - if (st.st_size < 0 || (unsigned)st.st_size < sizeof(*fw_header)) { + if (params->fwsize < sizeof(*fw_header)) { WARNX(2, "file too short: %s", path); goto fail; } - /* - * mmap the whole image. - */ - fw_image = (uint32_t *)mmap(NULL, st.st_size, PROT_READ, - MAP_PRIVATE, fd, 0); - if (fw_image == MAP_FAILED) { - WARN(0, "mmap(%s)", path); - goto fail; - } - fw_header = (amd_fw_header_t *)fw_image; + fw_header = (const amd_fw_header_t *)fw_image; if ((fw_header->magic >> 8) != AMD_MAGIC) { WARNX(2, "%s is not a valid amd firmware: version mismatch", path); goto fail; } - fw_data = (uint32_t *)(fw_header + 1); - fw_size = (st.st_size - sizeof(*fw_header)) / sizeof(uint32_t); + fw_data = (const uint32_t *)(fw_header + 1); + fw_size = (params->fwsize - sizeof(*fw_header)) / sizeof(uint32_t); /* * Check the primary checksum. @@ -160,8 +139,8 @@ amd_update(const char *dev, const char *path) if (signature == fw_header->signature) { fprintf(stderr, "%s: updating cpu %s... ", path, dev); - args.data = fw_image; - args.size = st.st_size; + args.data = __DECONST(void *, fw_image); + args.size = params->fwsize; error = ioctl(devfd, CPUCTL_UPDATE, &args); if (error < 0) { fprintf(stderr, "failed.\n"); @@ -172,12 +151,5 @@ amd_update(const char *dev, const char *path) } fail: - if (fd >= 0) - close(fd); - if (devfd >= 0) - close(devfd); - if (fw_image != MAP_FAILED) - if(munmap(fw_image, st.st_size) != 0) - warn("munmap(%s)", path); return; } Modified: head/usr.sbin/cpucontrol/amd10h.c ============================================================================== --- head/usr.sbin/cpucontrol/amd10h.c Wed Nov 14 00:12:04 2018 (r340420) +++ head/usr.sbin/cpucontrol/amd10h.c Wed Nov 14 00:21:49 2018 (r340421) @@ -88,9 +88,8 @@ amd10h_probe(int fd) * source code. */ void -amd10h_update(const char *dev, const char *path) +amd10h_update(const struct ucode_update_params *params) { - struct stat st; cpuctl_cpuid_args_t idargs; cpuctl_msr_args_t msrargs; cpuctl_update_args_t args; @@ -100,27 +99,27 @@ amd10h_update(const char *dev, const char *path) const section_header_t *section_header; const container_header_t *container_header; const uint8_t *fw_data; - uint8_t *fw_image; + const uint8_t *fw_image; + const char *dev, *path; size_t fw_size; size_t selected_size; uint32_t revision; uint32_t new_rev; uint32_t signature; uint16_t equiv_id; - int fd, devfd; + int devfd; unsigned int i; int error; + dev = params->dev_path; + path = params->fw_path; + devfd = params->devfd; + fw_image = params->fwimage; + fw_size = params->fwsize; + assert(path); assert(dev); - fd = -1; - fw_image = MAP_FAILED; - devfd = open(dev, O_RDWR); - if (devfd < 0) { - WARN(0, "could not open %s for writing", dev); - return; - } idargs.level = 1; error = ioctl(devfd, CPUCTL_CPUID, &idargs); if (error < 0) { @@ -149,33 +148,15 @@ amd10h_update(const char *dev, const char *path) * Open the firmware file. */ WARNX(1, "checking %s for update.", path); - fd = open(path, O_RDONLY, 0); - if (fd < 0) { - WARN(0, "open(%s)", path); - goto done; - } - error = fstat(fd, &st); - if (error != 0) { - WARN(0, "fstat(%s)", path); - goto done; - } - if (st.st_size < 0 || (size_t)st.st_size < + if (fw_size < (sizeof(*container_header) + sizeof(*section_header))) { WARNX(2, "file too short: %s", path); goto done; } - fw_size = st.st_size; /* * mmap the whole image. */ - fw_image = (uint8_t *)mmap(NULL, st.st_size, PROT_READ, - MAP_PRIVATE, fd, 0); - if (fw_image == MAP_FAILED) { - WARN(0, "mmap(%s)", path); - goto done; - } - fw_data = fw_image; container_header = (const container_header_t *)fw_data; if (container_header->magic != AMD_10H_MAGIC) { @@ -306,12 +287,5 @@ amd10h_update(const char *dev, const char *path) WARNX(0, "revision after update %#x", new_rev); done: - if (fd >= 0) - close(fd); - if (devfd >= 0) - close(devfd); - if (fw_image != MAP_FAILED) - if (munmap(fw_image, st.st_size) != 0) - warn("munmap(%s)", path); return; } Modified: head/usr.sbin/cpucontrol/cpucontrol.c ============================================================================== --- head/usr.sbin/cpucontrol/cpucontrol.c Wed Nov 14 00:12:04 2018 (r340420) +++ head/usr.sbin/cpucontrol/cpucontrol.c Wed Nov 14 00:21:49 2018 (r340421) @@ -34,18 +34,20 @@ __FBSDID("$FreeBSD$"); #include <assert.h> +#include <err.h> +#include <errno.h> +#include <dirent.h> +#include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> -#include <fcntl.h> -#include <err.h> #include <sysexits.h> -#include <dirent.h> #include <sys/queue.h> #include <sys/param.h> #include <sys/types.h> +#include <sys/mman.h> #include <sys/stat.h> #include <sys/ioctl.h> #include <sys/cpuctl.h> @@ -74,16 +76,6 @@ int verbosity_level = 0; #define HIGH(val) (uint32_t)(((val) >> 32) & 0xffffffff) #define LOW(val) (uint32_t)((val) & 0xffffffff) -/* - * Macros for freeing SLISTs, probably must be in /sys/queue.h - */ -#define SLIST_FREE(head, field, freef) do { \ - typeof(SLIST_FIRST(head)) __elm0; \ - typeof(SLIST_FIRST(head)) __elm; \ - SLIST_FOREACH_SAFE(__elm, (head), field, __elm0) \ - (void)(freef)(__elm); \ -} while(0); - struct datadir { const char *path; SLIST_ENTRY(datadir) next; @@ -102,7 +94,6 @@ static struct ucode_handler { #define NHANDLERS (sizeof(handlers) / sizeof(*handlers)) static void usage(void); -static int isdir(const char *path); static int do_cpuid(const char *cmdarg, const char *dev); static int do_cpuid_count(const char *cmdarg, const char *dev); static int do_msr(const char *cmdarg, const char *dev); @@ -123,20 +114,6 @@ usage(void) } static int -isdir(const char *path) -{ - int error; - struct stat st; - - error = stat(path, &st); - if (error < 0) { - WARN(0, "stat(%s)", path); - return (error); - } - return (st.st_mode & S_IFDIR); -} - -static int do_cpuid(const char *cmdarg, const char *dev) { unsigned int level; @@ -361,16 +338,77 @@ do_eval_cpu_features(const char *dev) } static int +try_a_fw_image(const char *dev_path, int devfd, int fwdfd, const char *dpath, + const char *fname, struct ucode_handler *handler) +{ + struct ucode_update_params parm; + struct stat st; + char *fw_path; + void *fw_map; + int fwfd, rc; + + rc = 0; + fw_path = NULL; + fw_map = MAP_FAILED; + fwfd = openat(fwdfd, fname, O_RDONLY); + if (fwfd < 0) { + WARN(0, "openat(%s, %s)", dpath, fname); + goto out; + } + + rc = asprintf(&fw_path, "%s/%s", dpath, fname); + if (rc == -1) { + WARNX(0, "out of memory"); + rc = ENOMEM; + goto out; + } + + rc = fstat(fwfd, &st); + if (rc != 0) { + WARN(0, "fstat(%s)", fw_path); + rc = 0; + goto out; + } + if (st.st_size <= 0) { + WARN(0, "%s: empty", fw_path); + goto out; + } + + fw_map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fwfd, 0); + if (fw_map == MAP_FAILED) { + WARN(0, "mmap(%s)", fw_path); + goto out; + } + + + memset(&parm, 0, sizeof(parm)); + parm.devfd = devfd; + parm.fwimage = fw_map; + parm.fwsize = st.st_size; + parm.dev_path = dev_path; + parm.fw_path = fw_path; + + handler->update(&parm); + +out: + if (fw_map != MAP_FAILED) + munmap(fw_map, st.st_size); + free(fw_path); + if (fwfd >= 0) + close(fwfd); + return (rc); +} + +static int do_update(const char *dev) { - int fd; + int fd, fwdfd; unsigned int i; int error; struct ucode_handler *handler; struct datadir *dir; DIR *dirp; struct dirent *direntry; - char buf[MAXPATHLEN]; fd = open(dev, O_RDONLY); if (fd < 0) { @@ -379,7 +417,7 @@ do_update(const char *dev) } /* - * Find the appropriate handler for device. + * Find the appropriate handler for CPU. */ for (i = 0; i < NHANDLERS; i++) if (handlers[i].probe(fd) == 0) @@ -387,39 +425,54 @@ do_update(const char *dev) if (i < NHANDLERS) handler = &handlers[i]; else { - WARNX(0, "cannot find the appropriate handler for device"); + WARNX(0, "cannot find the appropriate handler for %s", dev); close(fd); return (1); } close(fd); + fd = open(dev, O_RDWR); + if (fd < 0) { + WARN(0, "error opening %s for writing", dev); + return (1); + } + /* * Process every image in specified data directories. */ SLIST_FOREACH(dir, &datadirs, next) { - dirp = opendir(dir->path); - if (dirp == NULL) { - WARNX(1, "skipping directory %s: not accessible", dir->path); + fwdfd = open(dir->path, O_RDONLY); + if (fwdfd < 0) { + WARN(1, "skipping directory %s: not accessible", dir->path); continue; } + dirp = fdopendir(fwdfd); + if (dirp == NULL) { + WARNX(0, "out of memory"); + close(fwdfd); + close(fd); + return (1); + } + while ((direntry = readdir(dirp)) != NULL) { if (direntry->d_namlen == 0) continue; - error = snprintf(buf, sizeof(buf), "%s/%s", dir->path, - direntry->d_name); - if ((unsigned)error >= sizeof(buf)) - WARNX(0, "skipping %s, buffer too short", - direntry->d_name); - if (isdir(buf) != 0) { - WARNX(2, "skipping %s: is a directory", buf); + if (direntry->d_type == DT_DIR) continue; + + error = try_a_fw_image(dev, fd, fwdfd, dir->path, + direntry->d_name, handler); + if (error != 0) { + closedir(dirp); + close(fd); + return (1); } - handler->update(dev, buf); } error = closedir(dirp); if (error != 0) WARN(0, "closedir(%s)", dir->path); } + close(fd); return (0); } @@ -441,6 +494,7 @@ datadir_add(const char *path) int main(int argc, char *argv[]) { + struct datadir *elm; int c, flags; const char *cmdarg; const char *dev; @@ -511,6 +565,9 @@ main(int argc, char *argv[]) default: usage(); /* Only one command can be selected. */ } - SLIST_FREE(&datadirs, next, free); + while ((elm = SLIST_FIRST(&datadirs)) != NULL) { + SLIST_REMOVE_HEAD(&datadirs, next); + free(elm); + } return (error == 0 ? 0 : 1); } Modified: head/usr.sbin/cpucontrol/cpucontrol.h ============================================================================== --- head/usr.sbin/cpucontrol/cpucontrol.h Wed Nov 14 00:12:04 2018 (r340420) +++ head/usr.sbin/cpucontrol/cpucontrol.h Wed Nov 14 00:21:49 2018 (r340421) @@ -30,8 +30,17 @@ #ifndef CPUCONTROL_H #define CPUCONTROL_H +#include <stddef.h> + typedef int ucode_probe_t(int fd); -typedef void ucode_update_t(const char *dev, const char *image); +struct ucode_update_params { + int devfd; /* RDWR handle to cpucontrol device */ + const void *fwimage; /* READ mapping of firmware image */ + size_t fwsize; /* Non-zero size of firmware image */ + const char *dev_path; /* cpucontrol device path, for logging */ + const char *fw_path; /* firmware image path, for logging */ +}; +typedef void ucode_update_t(const struct ucode_update_params *params); extern int verbosity_level; Modified: head/usr.sbin/cpucontrol/intel.c ============================================================================== --- head/usr.sbin/cpucontrol/intel.c Wed Nov 14 00:12:04 2018 (r340420) +++ head/usr.sbin/cpucontrol/intel.c Wed Nov 14 00:21:49 2018 (r340421) @@ -76,23 +76,23 @@ intel_probe(int fd) } void -intel_update(const char *dev, const char *path) +intel_update(const struct ucode_update_params *params) { - int fd, devfd; - struct stat st; - uint32_t *fw_image; + int devfd; + const char *dev, *path; + const uint32_t *fw_image; int have_ext_table; uint32_t sum; unsigned int i; size_t payload_size; - intel_fw_header_t *fw_header; - intel_cpu_signature_t *ext_table; - intel_ext_header_t *ext_header; + const intel_fw_header_t *fw_header; + const intel_cpu_signature_t *ext_table; + const intel_ext_header_t *ext_header; uint32_t sig, signature, flags; int32_t revision; ssize_t ext_size; size_t ext_table_size; - void *fw_data; + const void *fw_data; size_t data_size, total_size; cpuctl_msr_args_t msrargs = { .msr = MSR_BIOS_SIGN, @@ -104,18 +104,17 @@ intel_update(const char *dev, const char *path) cpuctl_update_args_t args; int error; + dev = params->dev_path; + path = params->fw_path; + devfd = params->devfd; + fw_image = params->fwimage; + assert(path); assert(dev); - fd = -1; - fw_image = MAP_FAILED; ext_table = NULL; ext_header = NULL; - devfd = open(dev, O_RDWR); - if (devfd < 0) { - WARN(0, "could not open %s for writing", dev); - return; - } + error = ioctl(devfd, CPUCTL_WRMSR, &msrargs); if (error < 0) { WARN(0, "ioctl(%s)", dev); @@ -151,31 +150,12 @@ intel_update(const char *dev, const char *path) /* * Open firmware image. */ - fd = open(path, O_RDONLY, 0); - if (fd < 0) { - WARN(0, "open(%s)", path); - goto fail; - } - error = fstat(fd, &st); - if (error != 0) { - WARN(0, "fstat(%s)", path); - goto fail; - } - if (st.st_size < 0 || (unsigned)st.st_size < sizeof(*fw_header)) { + if (params->fwsize < sizeof(*fw_header)) { WARNX(2, "file too short: %s", path); goto fail; } - /* - * mmap the whole image. - */ - fw_image = (uint32_t *)mmap(NULL, st.st_size, PROT_READ, - MAP_PRIVATE, fd, 0); - if (fw_image == MAP_FAILED) { - WARN(0, "mmap(%s)", path); - goto fail; - } - fw_header = (intel_fw_header_t *)fw_image; + fw_header = (const intel_fw_header_t *)fw_image; if (fw_header->header_version != INTEL_HEADER_VERSION || fw_header->loader_revision != INTEL_LOADER_REVISION) { WARNX(2, "%s is not a valid intel firmware: version mismatch", @@ -193,7 +173,7 @@ intel_update(const char *dev, const char *path) total_size = data_size + sizeof(*fw_header); else total_size = fw_header->total_size; - if (total_size > (unsigned)st.st_size || st.st_size < 0) { + if (total_size > params->fwsize) { WARNX(2, "file too short: %s", path); goto fail; } @@ -204,7 +184,7 @@ intel_update(const char *dev, const char *path) */ sum = 0; for (i = 0; i < (payload_size / sizeof(uint32_t)); i++) - sum += *((uint32_t *)fw_image + i); + sum += *((const uint32_t *)fw_image + i); if (sum != 0) { WARNX(2, "%s: update data checksum invalid", path); goto fail; @@ -217,9 +197,9 @@ intel_update(const char *dev, const char *path) have_ext_table = 0; if (ext_size > (signed)sizeof(*ext_header)) { - ext_header = - (intel_ext_header_t *)((char *)fw_image + payload_size); - ext_table = (intel_cpu_signature_t *)(ext_header + 1); + ext_header = (const intel_ext_header_t *) + ((const char *)fw_image + payload_size); + ext_table = (const intel_cpu_signature_t *)(ext_header + 1); /* * Check the extended table size. @@ -236,7 +216,7 @@ intel_update(const char *dev, const char *path) */ sum = 0; for (i = 0; i < (ext_table_size / sizeof(uint32_t)); i++) - sum += *((uint32_t *)ext_header + i); + sum += *((const uint32_t *)ext_header + i); if (sum != 0) { WARNX(2, "%s: extended signature table checksum invalid", @@ -273,7 +253,7 @@ matched: } fprintf(stderr, "%s: updating cpu %s from rev %#x to rev %#x... ", path, dev, revision, fw_header->revision); - args.data = fw_data; + args.data = __DECONST(void *, fw_data); args.size = data_size; error = ioctl(devfd, CPUCTL_UPDATE, &args); if (error < 0) { @@ -286,11 +266,5 @@ matched: fprintf(stderr, "done.\n"); fail: - if (fw_image != MAP_FAILED) - if (munmap(fw_image, st.st_size) != 0) - warn("munmap(%s)", path); - if (devfd >= 0) - close(devfd); - if (fd >= 0) - close(fd); + return; } Modified: head/usr.sbin/cpucontrol/via.c ============================================================================== --- head/usr.sbin/cpucontrol/via.c Wed Nov 14 00:12:04 2018 (r340420) +++ head/usr.sbin/cpucontrol/via.c Wed Nov 14 00:21:49 2018 (r340421) @@ -76,18 +76,18 @@ via_probe(int fd) } void -via_update(const char *dev, const char *path) +via_update(const struct ucode_update_params *params) { - int fd, devfd; - struct stat st; - uint32_t *fw_image; + int devfd; + const char *dev, *path; + const uint32_t *fw_image; uint32_t sum; unsigned int i; size_t payload_size; - via_fw_header_t *fw_header; + const via_fw_header_t *fw_header; uint32_t signature; int32_t revision; - void *fw_data; + const void *fw_data; size_t data_size, total_size; cpuctl_msr_args_t msrargs = { .msr = MSR_IA32_PLATFORM_ID, @@ -98,17 +98,14 @@ via_update(const char *dev, const char *path) cpuctl_update_args_t args; int error; + dev = params->dev_path; + path = params->fw_path; + devfd = params->devfd; + fw_image = params->fwimage; + assert(path); assert(dev); - fd = -1; - devfd = -1; - fw_image = MAP_FAILED; - devfd = open(dev, O_RDWR); - if (devfd < 0) { - WARN(0, "could not open %s for writing", dev); - return; - } error = ioctl(devfd, CPUCTL_CPUID, &idargs); if (error < 0) { WARN(0, "ioctl(%s)", dev); @@ -134,34 +131,13 @@ via_update(const char *dev, const char *path) WARNX(2, "found cpu type %#x family %#x model %#x stepping %#x.", (signature >> 12) & 0x03, (signature >> 8) & 0x0f, (signature >> 4) & 0x0f, (signature >> 0) & 0x0f); - /* - * Open firmware image. - */ - fd = open(path, O_RDONLY, 0); - if (fd < 0) { - WARN(0, "open(%s)", path); - goto fail; - } - error = fstat(fd, &st); - if (error != 0) { - WARN(0, "fstat(%s)", path); - goto fail; - } - if (st.st_size < 0 || (unsigned)st.st_size < sizeof(*fw_header)) { + + if (params->fwsize < sizeof(*fw_header)) { WARNX(2, "file too short: %s", path); goto fail; } - /* - * mmap the whole image. - */ - fw_image = (uint32_t *)mmap(NULL, st.st_size, PROT_READ, - MAP_PRIVATE, fd, 0); - if (fw_image == MAP_FAILED) { - WARN(0, "mmap(%s)", path); - goto fail; - } - fw_header = (via_fw_header_t *)fw_image; + fw_header = (const via_fw_header_t *)fw_image; if (fw_header->signature != VIA_HEADER_SIGNATURE || fw_header->loader_revision != VIA_LOADER_REVISION) { WARNX(2, "%s is not a valid via firmware: version mismatch", @@ -170,7 +146,7 @@ via_update(const char *dev, const char *path) } data_size = fw_header->data_size; total_size = fw_header->total_size; - if (total_size > (unsigned)st.st_size || st.st_size < 0) { + if (total_size > params->fwsize) { WARNX(2, "file too short: %s", path); goto fail; } @@ -181,7 +157,7 @@ via_update(const char *dev, const char *path) */ sum = 0; for (i = 0; i < (payload_size / sizeof(uint32_t)); i++) - sum += *((uint32_t *)fw_image + i); + sum += *((const uint32_t *)fw_image + i); if (sum != 0) { WARNX(2, "%s: update data checksum invalid", path); goto fail; @@ -202,25 +178,18 @@ via_update(const char *dev, const char *path) } fprintf(stderr, "%s: updating cpu %s from rev %#x to rev %#x... ", path, dev, revision, fw_header->revision); - args.data = fw_data; + args.data = __DECONST(void *, fw_data); args.size = data_size; error = ioctl(devfd, CPUCTL_UPDATE, &args); if (error < 0) { error = errno; - fprintf(stderr, "failed.\n"); + fprintf(stderr, "failed.\n"); errno = error; - WARN(0, "ioctl()"); - goto fail; + WARN(0, "ioctl()"); + goto fail; } fprintf(stderr, "done.\n"); fail: - if (fw_image != MAP_FAILED) - if (munmap(fw_image, st.st_size) != 0) - warn("munmap(%s)", path); - if (devfd >= 0) - close(devfd); - if (fd >= 0) - close(fd); return; }
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201811140021.wAE0LnWL008210>