mirror of
https://github.com/libfuse/libfuse.git
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142 lines
4.0 KiB
C
142 lines
4.0 KiB
C
/*
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FUSE: Filesystem in Userspace
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Copyright (C) 2017 Nikolaus Rath <Nikolaus@rath.org>
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This program can be distributed under the terms of the GNU GPLv2.
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See the file COPYING.
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*/
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/** @file
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*
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* minimal example filesystem that prints out all capabilities
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* supported by the kernel and then exits.
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*
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* Compile with:
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*
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* gcc -Wall printcap.c `pkg-config fuse3 --cflags --libs` -o printcap
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*
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* ## Source code ##
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* \include printcap.c
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*/
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#define FUSE_USE_VERSION 31
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#include <fuse_lowlevel.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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struct fuse_session *se;
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static void pc_init(void *userdata,
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struct fuse_conn_info *conn)
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{
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(void) userdata;
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printf("Protocol version: %d.%d\n", conn->proto_major,
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conn->proto_minor);
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printf("Capabilities:\n");
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if(conn->capable & FUSE_CAP_ASYNC_READ)
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printf("\tFUSE_CAP_ASYNC_READ\n");
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if(conn->capable & FUSE_CAP_POSIX_LOCKS)
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printf("\tFUSE_CAP_POSIX_LOCKS\n");
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if(conn->capable & FUSE_CAP_ATOMIC_O_TRUNC)
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printf("\tFUSE_CAP_ATOMIC_O_TRUNC\n");
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if(conn->capable & FUSE_CAP_EXPORT_SUPPORT)
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printf("\tFUSE_CAP_EXPORT_SUPPORT\n");
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if(conn->capable & FUSE_CAP_DONT_MASK)
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printf("\tFUSE_CAP_DONT_MASK\n");
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if(conn->capable & FUSE_CAP_SPLICE_MOVE)
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printf("\tFUSE_CAP_SPLICE_MOVE\n");
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if(conn->capable & FUSE_CAP_SPLICE_READ)
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printf("\tFUSE_CAP_SPLICE_READ\n");
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if(conn->capable & FUSE_CAP_SPLICE_WRITE)
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printf("\tFUSE_CAP_SPLICE_WRITE\n");
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if(conn->capable & FUSE_CAP_FLOCK_LOCKS)
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printf("\tFUSE_CAP_FLOCK_LOCKS\n");
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if(conn->capable & FUSE_CAP_IOCTL_DIR)
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printf("\tFUSE_CAP_IOCTL_DIR\n");
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if(conn->capable & FUSE_CAP_AUTO_INVAL_DATA)
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printf("\tFUSE_CAP_AUTO_INVAL_DATA\n");
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if(conn->capable & FUSE_CAP_READDIRPLUS)
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printf("\tFUSE_CAP_READDIRPLUS\n");
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if(conn->capable & FUSE_CAP_READDIRPLUS_AUTO)
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printf("\tFUSE_CAP_READDIRPLUS_AUTO\n");
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if(conn->capable & FUSE_CAP_ASYNC_DIO)
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printf("\tFUSE_CAP_ASYNC_DIO\n");
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if(conn->capable & FUSE_CAP_WRITEBACK_CACHE)
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printf("\tFUSE_CAP_WRITEBACK_CACHE\n");
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if(conn->capable & FUSE_CAP_NO_OPEN_SUPPORT)
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printf("\tFUSE_CAP_NO_OPEN_SUPPORT\n");
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if(conn->capable & FUSE_CAP_PARALLEL_DIROPS)
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printf("\tFUSE_CAP_PARALLEL_DIROPS\n");
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if(conn->capable & FUSE_CAP_POSIX_ACL)
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printf("\tFUSE_CAP_POSIX_ACL\n");
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if(conn->capable & FUSE_CAP_CACHE_SYMLINKS)
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printf("\tFUSE_CAP_CACHE_SYMLINKS\n");
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if(conn->capable & FUSE_CAP_NO_OPENDIR_SUPPORT)
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printf("\tFUSE_CAP_NO_OPENDIR_SUPPORT\n");
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if(conn->capable & FUSE_CAP_EXPLICIT_INVAL_DATA)
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printf("\tFUSE_CAP_EXPLICIT_INVAL_DATA\n");
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if(conn->capable & FUSE_CAP_EXPIRE_ONLY)
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printf("\tFUSE_CAP_EXPIRE_ONLY\n");
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if(conn->capable & FUSE_CAP_SETXATTR_EXT)
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printf("\tFUSE_CAP_SETXATTR_EXT\n");
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if(conn->capable & FUSE_CAP_HANDLE_KILLPRIV)
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printf("\tFUSE_CAP_HANDLE_KILLPRIV\n");
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if(conn->capable & FUSE_CAP_HANDLE_KILLPRIV_V2)
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printf("\tFUSE_CAP_HANDLE_KILLPRIV_V2\n");
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if(conn->capable & FUSE_CAP_DIRECT_IO_ALLOW_MMAP)
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printf("\tFUSE_CAP_DIRECT_IO_ALLOW_MMAP\n");
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if (conn->capable & FUSE_CAP_NO_EXPORT_SUPPORT)
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printf("\tFUSE_CAP_NO_EXPORT_SUPPORT\n");
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fuse_session_exit(se);
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}
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static const struct fuse_lowlevel_ops pc_oper = {
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.init = pc_init,
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};
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int main(int argc, char **argv)
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{
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struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
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char *mountpoint;
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int ret = -1;
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mountpoint = strdup("/tmp/fuse_printcap_XXXXXX");
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if(mkdtemp(mountpoint) == NULL) {
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perror("mkdtemp");
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return 1;
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}
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printf("FUSE library version %s\n", fuse_pkgversion());
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fuse_lowlevel_version();
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se = fuse_session_new(&args, &pc_oper,
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sizeof(pc_oper), NULL);
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if (se == NULL)
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goto err_out1;
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if (fuse_set_signal_handlers(se) != 0)
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goto err_out2;
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if (fuse_session_mount(se, mountpoint) != 0)
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goto err_out3;
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ret = fuse_session_loop(se);
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fuse_session_unmount(se);
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err_out3:
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fuse_remove_signal_handlers(se);
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err_out2:
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fuse_session_destroy(se);
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err_out1:
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rmdir(mountpoint);
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free(mountpoint);
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fuse_opt_free_args(&args);
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return ret ? 1 : 0;
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}
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