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
|
/**
* @file mime.c
*/
#include "spm.h"
#include <fnmatch.h>
/**
* Execute OS `file` command
* @param _filename path to file
* @return Process structure
*/
Process *file_command(const char *_filename) {
char *filename = strdup(_filename);
Process *proc_info = NULL;
char sh_cmd[PATH_MAX];
sh_cmd[0] = '\0';
#ifdef __APPLE__
const char *fmt_cmd = "file -I \"%s\"";
#else // GNU
const char *fmt_cmd = "file -E -i \"%s\" 2>&1";
#endif
strchrdel(filename, SHELL_INVALID);
sprintf(sh_cmd, fmt_cmd, filename);
shell(&proc_info, SHELL_OUTPUT, sh_cmd);
#ifdef __APPLE__
// Force BSD command to return non-zero when a file can't be found
const char *failmsg = ": cannot open";
if (strstr(proc_info->output, failmsg) != NULL) {
proc_info->returncode = 1;
}
#endif
free(filename);
return proc_info;
}
/**
* Execute the `file` command, parse its output, and return the data in a `Mime` structure
* @param filename path to file
* @return Mime structure
*/
Mime *file_mimetype(const char *filename) {
char **output = NULL;
char **parts = NULL;
Mime *type = NULL;
Process *proc = file_command(filename);
if (proc->returncode != 0) {
shell_free(proc);
return NULL;
}
output = split(proc->output, ":");
if (!output || output[1] == NULL) {
shell_free(proc);
return NULL;
}
parts = split(output[1], ";");
if (!parts || !parts[0] || !parts[1]) {
shell_free(proc);
return NULL;
}
char *what = strdup(parts[0]);
what = lstrip(what);
char *charset = strdup(strchr(parts[1], '=') + 1);
charset = lstrip(charset);
charset[strlen(charset) - 1] = '\0';
char *origin = realpath(filename, NULL);
type = (Mime *)calloc(1, sizeof(Mime));
type->origin = origin;
type->type = what;
type->charset = charset;
split_free(output);
split_free(parts);
shell_free(proc);
return type;
}
/**
* Free a `Mime` structure
* @param m
*/
void mime_free(Mime *m) {
if (m != NULL) {
free(m->origin);
free(m->type);
free(m->charset);
free(m);
}
}
/**
* Determine if a file is a text file
* @param filename
* @return yes=1, no=0
*/
int file_is_text(const char *filename) {
int result = 0;
char *path = normpath(filename);
Mime *type = file_mimetype(path);
if (startswith(type->type, "text/")) {
result = 1;
}
free(path);
mime_free(type);
return result;
}
/**
* Determine if a file is a binary data file
* @param filename
* @return yes=1, no=0
*/
int file_is_binary(const char *filename) {
int result = 0;
char *path = normpath(filename);
Mime *type = file_mimetype(path);
if (startswith(type->type, "application/") && strcmp(type->charset, "binary") == 0) {
result = 1;
}
free(path);
mime_free(type);
return result;
}
int file_is_binexec(const char *filename) {
int result = 0;
char *path = normpath(filename);
Mime *type = file_mimetype(path);
// file-5.38: changed mime name associated with executables
// TODO: implement compatibility function to return the correct search pattern
if (fnmatch("application/x-[pic|pie|ex|sh]*", type->type, FNM_PATHNAME) != FNM_NOMATCH && strcmp(type->charset, "binary") == 0) {
result = 1;
}
free(path);
mime_free(type);
return result;
}
|
