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
|
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "installer.h"
static struct stat statbuf;
int bin;
int man;
static void diesys(const char* msg)
{
fprintf(stderr, "installer error: %s:\n %s\n", msg,
strerror(errno));
exit(1);
}
static void diefsys(const char* msg, const char* filename)
{
fprintf(stderr, "installer error: %s '%s':\n %s\n", msg, filename,
strerror(errno));
exit(1);
}
static void warn(const char* filename, const char* msg)
{
printf("instcheck warning: File '%s' %s.\n", filename, msg);
}
static void testmode(int dir, const char* filename,
unsigned uid, unsigned gid, unsigned mode, unsigned type)
{
if (fchdir(dir) == -1)
diesys("Could not change base directory");
if (stat(filename, &statbuf) == -1) {
if (errno == ENOENT)
warn(filename, "is missing");
else
diefsys("Could not stat file", filename);
}
if ((statbuf.st_mode & S_IFMT) != type)
warn(filename, "is the wrong type of file");
if (uid != (unsigned)-1 && statbuf.st_uid != uid)
warn(filename, "has wrong owner");
if (gid != (unsigned)-1 && statbuf.st_gid != gid)
warn(filename, "has wrong group");
if ((statbuf.st_mode & 07777) != mode)
warn(filename, "has wrong permissions");
}
void c(int dir, const char* filename,
unsigned uid, unsigned gid, unsigned mode)
{
testmode(dir, filename, uid, gid, mode, S_IFREG);
}
int d(int dir, const char* subdir,
unsigned uid, unsigned gid, unsigned mode)
{
testmode(dir, subdir, uid, gid, mode, S_IFDIR);
return opendir(subdir);
}
int opendir(const char* dir)
{
int fd;
if (chdir(dir) == -1)
diefsys("Could not change directory to", dir);
if ((fd = open(".", O_RDONLY)) == -1)
diefsys("Could not open directory", dir);
return fd;
}
int opensubdir(int dir, const char* subdir)
{
if (fchdir(dir) == -1)
diesys("Could not change base directory in opensubdir");
return opendir(subdir);
}
int main(void)
{
insthier();
return 0;
}
|
