diff options
Diffstat (limited to 'man2/ioctl_ns.2')
| -rw-r--r-- | man2/ioctl_ns.2 | 38 |
1 files changed, 19 insertions, 19 deletions
diff --git a/man2/ioctl_ns.2 b/man2/ioctl_ns.2 index 124e17e89..a11e54b9b 100644 --- a/man2/ioctl_ns.2 +++ b/man2/ioctl_ns.2 @@ -3,7 +3,7 @@ .\" SPDX-License-Identifier: Linux-man-pages-copyleft .\" .\" -.TH ioctl_ns 2 2023-02-05 "Linux man-pages 6.03" +.TH ioctl_ns 2 2023-05-03 "Linux man-pages 6.05.01" .SH NAME ioctl_ns \- ioctl() operations for Linux namespaces .SH DESCRIPTION @@ -162,10 +162,10 @@ operations can return the following errors: .B ENOTTY .I fd does not refer to a -.I /proc/[pid]/ns/* +.IR /proc/ pid /ns/ * file. .SH STANDARDS -Namespaces and the operations described on this page are a Linux-specific. +Linux. .SH EXAMPLES The example shown below uses the .BR ioctl (2) @@ -232,7 +232,7 @@ The owning user namespace is outside your namespace scope .\" SRC BEGIN (ns_show.c) .EX /* ns_show.c - +\& Licensed under the GNU General Public License v2 or later. */ #include <errno.h> @@ -246,13 +246,13 @@ The owning user namespace is outside your namespace scope #include <sys/stat.h> #include <sys/sysmacros.h> #include <unistd.h> - +\& int main(int argc, char *argv[]) { int fd, userns_fd, parent_fd; struct stat sb; - +\& if (argc < 2) { fprintf(stderr, "Usage: %s /proc/[pid]/ns/[file] [p|u]\en", argv[0]); @@ -263,22 +263,22 @@ main(int argc, char *argv[]) "NS_GET_USERNS is the default.\en"); exit(EXIT_FAILURE); } - +\& /* Obtain a file descriptor for the \[aq]ns\[aq] file specified in argv[1]. */ - +\& fd = open(argv[1], O_RDONLY); if (fd == \-1) { perror("open"); exit(EXIT_FAILURE); } - +\& /* Obtain a file descriptor for the owning user namespace and then obtain and display the inode number of that namespace. */ - +\& if (argc < 3 || strchr(argv[2], \[aq]u\[aq])) { userns_fd = ioctl(fd, NS_GET_USERNS); - +\& if (userns_fd == \-1) { if (errno == EPERM) printf("The owning user namespace is outside " @@ -287,7 +287,7 @@ main(int argc, char *argv[]) perror("ioctl\-NS_GET_USERNS"); exit(EXIT_FAILURE); } - +\& if (fstat(userns_fd, &sb) == \-1) { perror("fstat\-userns"); exit(EXIT_FAILURE); @@ -297,16 +297,16 @@ main(int argc, char *argv[]) major(sb.st_dev), minor(sb.st_dev), (uintmax_t) sb.st_ino); - +\& close(userns_fd); } - +\& /* Obtain a file descriptor for the parent namespace and then obtain and display the inode number of that namespace. */ - +\& if (argc > 2 && strchr(argv[2], \[aq]p\[aq])) { parent_fd = ioctl(fd, NS_GET_PARENT); - +\& if (parent_fd == \-1) { if (errno == EINVAL) printf("Can\[aq] get parent namespace of a " @@ -318,7 +318,7 @@ main(int argc, char *argv[]) perror("ioctl\-NS_GET_PARENT"); exit(EXIT_FAILURE); } - +\& if (fstat(parent_fd, &sb) == \-1) { perror("fstat\-parentns"); exit(EXIT_FAILURE); @@ -327,10 +327,10 @@ main(int argc, char *argv[]) major(sb.st_dev), minor(sb.st_dev), (uintmax_t) sb.st_ino); - +\& close(parent_fd); } - +\& exit(EXIT_SUCCESS); } .EE |