summaryrefslogtreecommitdiffhomepage
path: root/src/internal/tpax_driver_impl.h
blob: 7e610d07856335c680319ea8c3cea096bfc93e72 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
/******************************************************/
/*  tpax: a topological pax implementation            */
/*  Copyright (C) 2020  Z. Gilboa                     */
/*  Released under GPLv2 and GPLv3; see COPYING.TPAX. */
/******************************************************/

#ifndef TPAX_DRIVER_IMPL_H
#define TPAX_DRIVER_IMPL_H

#include <stdint.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>

#include <tpax/tpax.h>
#include <tpax/tpax_specs.h>
#include "tpax_dprintf_impl.h"
#include "argv/argv.h"

#define TPAX_OPTV_ELEMENTS 64

#define TPAX_DRIVER_EXEC_MODE_WRITE_COPY \
	(TPAX_DRIVER_EXEC_MODE_WRITE |    \
	 TPAX_DRIVER_EXEC_MODE_COPY)

extern const struct argv_option tpax_default_options[];

enum app_tags {
	TAG_HELP,
	TAG_VERSION,
	TAG_LIST,
	TAG_READ,
	TAG_WRITE,
	TAG_COPY,
	TAG_FORMAT,
	TAG_BLKSIZE,
	TAG_RECURSE,
	TAG_NORECURSE,
	TAG_STRICT_PATH,
	TAG_PURE_PATH,
};

struct tpax_driver_ctx_impl {
	struct tpax_common_ctx        cctx;
	struct tpax_driver_ctx        ctx;
	struct tpax_fd_ctx            fdctx;
	const struct tpax_unit_ctx *  euctx;
	const char *                  eunit;
	struct tpax_error_info **     errinfp;
	struct tpax_error_info **     erricap;
	struct tpax_error_info *      erriptr[64];
	struct tpax_error_info        erribuf[64];
	void *                        bufaddr;
	size_t                        bufsize;
};

struct tpax_unit_ctx_impl {
	const char *		path;
	struct tpax_unit_ctx	uctx;
	struct stat		st;
	const char *		link;
	char			linkbuf[1024];
	union {
		struct tpax_ustar_header uhdr;
		struct tpax_cpio_header  chdr;
	} hdrbufs;
};


static inline struct tpax_driver_ctx_impl * tpax_get_driver_ictx(
	const struct tpax_driver_ctx * dctx)
{
        uintptr_t addr;

        if (dctx) {
                addr = (uintptr_t)dctx - offsetof(struct tpax_driver_ctx_impl,ctx);
                return (struct tpax_driver_ctx_impl *)addr;
        }

        return 0;
}

static inline void * tpax_get_driver_anon_map_addr(
	const struct tpax_driver_ctx * dctx,
	size_t *                       size)
{
	struct tpax_driver_ctx_impl * ictx = tpax_get_driver_ictx(dctx);
	*size = ictx->bufsize;
	return ictx->bufaddr;
}

static inline void tpax_driver_set_ectx(
	const struct tpax_driver_ctx * dctx,
	const struct tpax_unit_ctx *   uctx,
	const char *                 unit)
{
	struct tpax_driver_ctx_impl *  ictx;

	ictx        = tpax_get_driver_ictx(dctx);
	ictx->euctx = uctx;
	ictx->eunit = unit;
}

static inline int tpax_driver_fdin(const struct tpax_driver_ctx * dctx)
{
	struct tpax_fd_ctx fdctx;
	tpax_get_driver_fdctx(dctx,&fdctx);
	return fdctx.fdin;
}

static inline int tpax_driver_fdout(const struct tpax_driver_ctx * dctx)
{
	struct tpax_fd_ctx fdctx;
	tpax_get_driver_fdctx(dctx,&fdctx);
	return fdctx.fdout;
}

static inline int tpax_driver_fderr(const struct tpax_driver_ctx * dctx)
{
	struct tpax_fd_ctx fdctx;
	tpax_get_driver_fdctx(dctx,&fdctx);
	return fdctx.fderr;
}

static inline int tpax_driver_fdlog(const struct tpax_driver_ctx * dctx)
{
	struct tpax_fd_ctx fdctx;
	tpax_get_driver_fdctx(dctx,&fdctx);
	return fdctx.fdlog;
}

static inline int tpax_driver_fdcwd(const struct tpax_driver_ctx * dctx)
{
	struct tpax_fd_ctx fdctx;
	tpax_get_driver_fdctx(dctx,&fdctx);
	return fdctx.fdcwd;
}

static inline int tpax_driver_fddst(const struct tpax_driver_ctx * dctx)
{
	struct tpax_fd_ctx fdctx;
	tpax_get_driver_fdctx(dctx,&fdctx);
	return fdctx.fddst;
}

#endif