1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/pvfs.c	Fri Aug 02 06:03:38 2013 +0300
     1.3 @@ -0,0 +1,219 @@
     1.4 +#include <string.h>
     1.5 +#include <alloca.h>
     1.6 +#include <assert.h>
     1.7 +#include "pvfs.h"
     1.8 +#include "vnode.h"
     1.9 +
    1.10 +int pvfs_errno;
    1.11 +
    1.12 +int pvfs_mount(const char *mntpoint, const char *target)
    1.13 +{
    1.14 +	struct vnode *srcnode, *destnode;
    1.15 +
    1.16 +	/* first locate the mount point vnode */
    1.17 +	if(!(srcnode = vnode_lookup(mntpoint))) {
    1.18 +		pvfs_errno = ENOENT;
    1.19 +		return -1;
    1.20 +	}
    1.21 +	/* and make sure it's a directory */
    1.22 +	if(srcnode->type != VNODE_DIR) {
    1.23 +		pvfs_errno = ENOTDIR;
    1.24 +		return -1;
    1.25 +	}
    1.26 +
    1.27 +	/* then locate the target vnode (if it exists) */
    1.28 +	if(!(destnode = vnode_lookup(target))) {
    1.29 +		/* it's some error other than that target doesn't exist, fail... */
    1.30 +		if(pvfs_errno != ENOENT) {
    1.31 +			return -1;
    1.32 +		}
    1.33 +		/* if it doesn't exist, it might be the case we're trying
    1.34 +		 * to mount a package file or a real directory here. let's
    1.35 +		 * try them in turn...
    1.36 +		 */
    1.37 +		PVFS_DIR *dir;
    1.38 +		PVFS_FILE *fp;
    1.39 +
    1.40 +		if((dir = pvfs_opendir(target))) {
    1.41 +			/* it's obviously a real dir as vnode_lookup failed before... */
    1.42 +			assert(dir->real);
    1.43 +			if(!(destnode = vnode_create_dir(target, dir))) {
    1.44 +				return -1;
    1.45 +			}
    1.46 +
    1.47 +		} else if((fp = pvfs_fopen(target, "rb"))) {
    1.48 +			/* again, obviously real... */
    1.49 +			assert(fp->real);
    1.50 +			if(!(destnode = vnode_create_file(target, fp))) {
    1.51 +				return -1;
    1.52 +			}
    1.53 +
    1.54 +		} else {
    1.55 +			/* it's neither... so let's fail */
    1.56 +			pvfs_errno = ENOENT;
    1.57 +			return -1;
    1.58 +		}
    1.59 +	}
    1.60 +
    1.61 +	/* ok so we've got the two nodes, connect them up */
    1.62 +	srcnode->target = destnode;
    1.63 +	return 0;
    1.64 +}
    1.65 +
    1.66 +int pvfs_umount(const char *mntpoint)
    1.67 +{
    1.68 +	struct vnode *node = vnode_lookup(mntpoint);
    1.69 +	if(!node) {
    1.70 +		return -1;
    1.71 +	}
    1.72 +	if(node->type != VNODE_DIR) {
    1.73 +		pvfs_errno = ENOTDIR;
    1.74 +		return -1;
    1.75 +	}
    1.76 +	if(!node->target) {
    1.77 +		pvfs_errno = EINVAL;
    1.78 +		return -1;
    1.79 +	}
    1.80 +	node->target = 0;
    1.81 +	return 0;
    1.82 +}
    1.83 +
    1.84 +int pvfs_chdir(const char *path)
    1.85 +{
    1.86 +	return vnode_chdir(path);
    1.87 +}
    1.88 +
    1.89 +int pvfs_mkdir(const char *path, unsigned int mode)
    1.90 +{
    1.91 +	char *ppath;
    1.92 +	const char *dname;
    1.93 +	struct vnode *parent = 0;
    1.94 +
    1.95 +	ppath = alloca(strlen(path) + 1);
    1.96 +	strcpy(ppath, path);
    1.97 +
    1.98 +	if((dname = strrchr(path, '/'))) {
    1.99 +		ppath[++dname - path] = 0;
   1.100 +		if(!*dname) {
   1.101 +			pvfs_errno = ENOENT;
   1.102 +			return -1;
   1.103 +		}
   1.104 +		if(!(parent = vnode_lookup(ppath))) {
   1.105 +			return -1;
   1.106 +		}
   1.107 +	} else {
   1.108 +		dname = ppath;
   1.109 +		parent = vnode_getcwd();
   1.110 +	}
   1.111 +
   1.112 +	return vnode_mkdir(parent, dname);
   1.113 +}
   1.114 +
   1.115 +PVFS_FILE *pvfs_fopen(const char *fname, const char *mode)
   1.116 +{
   1.117 +	FILE *fp;
   1.118 +	struct vnode *node;
   1.119 +
   1.120 +	/* if we find it in the filesystem, just use it... */
   1.121 +	if((fp = fopen(fname, mode))) {
   1.122 +		PVFS_FILE *vfp = malloc(sizeof *vfp);
   1.123 +		if(!vfp) {
   1.124 +			pvfs_errno = ENOMEM;
   1.125 +			return 0;
   1.126 +		}
   1.127 +		vfp->fp = fp;
   1.128 +		vfp->real = 1;
   1.129 +		return vfp;
   1.130 +	}
   1.131 +
   1.132 +	/* otherwise try and locate it in the virtual hierarchy */
   1.133 +	if(!(node = vnode_lookup(fname))) {
   1.134 +		return 0;
   1.135 +	}
   1.136 +	if(node->type != VNODE_FILE) {
   1.137 +		pvfs_errno = EISDIR;
   1.138 +		return 0;
   1.139 +	}
   1.140 +
   1.141 +	return VFILE(node);
   1.142 +}
   1.143 +
   1.144 +int pvfs_fclose(PVFS_FILE *fp)
   1.145 +{
   1.146 +	if(fp->real) {
   1.147 +		/* it's real, just close it and free the struct */
   1.148 +		fclose(fp->fp);
   1.149 +		free(fp);
   1.150 +		return 0;
   1.151 +	}
   1.152 +
   1.153 +	/* TODO */
   1.154 +	return -1;
   1.155 +}
   1.156 +
   1.157 +int pvfs_fseek(PVFS_FILE *fp, long offset, int whence);
   1.158 +long pvfs_ftell(PVFS_FILE *fp);
   1.159 +void pvfs_rewind(PVFS_FILE *fp);
   1.160 +
   1.161 +size_t pvfs_fread(void *buf, size_t size, size_t nitems, PVFS_FILE *fp);
   1.162 +size_t pvfs_write(void *buf, size_t size, size_t nitems, PVFS_FILE *fp);
   1.163 +
   1.164 +int pvfs_fgetc(PVFS_FILE *fp);
   1.165 +int pvfs_fputc(int c, PVFS_FILE *fp);
   1.166 +
   1.167 +char *pvfs_fgets(char *buf, int size, PVFS_FILE *fp);
   1.168 +int pvfs_fputs(char *buf, PVFS_FILE *fp);
   1.169 +
   1.170 +int pvfs_fscanf(PVFS_FILE *fp, const char *fmt, ...);
   1.171 +int pvfs_vfscanf(PVFS_FILE *fp, const char *fmt, va_list ap);
   1.172 +int pvfs_fprintf(PVFS_FILE *fp, const char *fmt, ...);
   1.173 +int pvfs_vfprintf(PVFS_FILE *fp, const char *fmt, va_list ap);
   1.174 +
   1.175 +void pvfs_clearerr(PVFS_FILE *fp);
   1.176 +int pvfs_feof(PVFS_FILE *fp);
   1.177 +int pvfs_ferror(PVFS_FILE *fp);
   1.178 +
   1.179 +/* POSIX stuff */
   1.180 +PVFS_DIR *pvfs_opendir(const char *dirname)
   1.181 +{
   1.182 +	DIR *dir;
   1.183 +	struct vnode *node;
   1.184 +
   1.185 +	if((dir = opendir(dirname))) {
   1.186 +		PVFS_DIR *vdir = malloc(sizeof *vdir);
   1.187 +		if(!vdir) {
   1.188 +			pvfs_errno = ENOMEM;
   1.189 +			return 0;
   1.190 +		}
   1.191 +
   1.192 +		vdir->real = 1;
   1.193 +		vdir->dir = dir;
   1.194 +		return vdir;
   1.195 +	}
   1.196 +
   1.197 +	if(!(node = vnode_lookup(dirname))) {
   1.198 +		return 0;
   1.199 +	}
   1.200 +	if(node->type != VNODE_DIR) {
   1.201 +		pvfs_errno = ENOTDIR;
   1.202 +		return 0;
   1.203 +	}
   1.204 +	return VDIR(node);
   1.205 +}
   1.206 +
   1.207 +int pvfs_closedir(PVFS_DIR *dir)
   1.208 +{
   1.209 +	if(dir->real) {
   1.210 +		int res = closedir(dir->dir);
   1.211 +		free(dir);
   1.212 +		return res;
   1.213 +	}
   1.214 +
   1.215 +	/* TODO */
   1.216 +	return -1;
   1.217 +}
   1.218 +struct pvfs_dirent *pvfs_readdir(PVFS_DIR *dir);
   1.219 +void pvfs_rewinddir(PVFS_DIR *dir);
   1.220 +
   1.221 +int pvfs_stat(const char *path, struct pvfs_stat *buf);
   1.222 +