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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "cleanpath.h"
// Make argument parsing less wordy
#define ARGM(X) strcmp(argv[i], X) == 0
// Global program path
static char *program;
static int is_valid_arg(char **args, char *s) {
int match;
match = 0;
// cause positional arguments to fall through as valid
if (*s != '-') {
return 1;
}
for (size_t i = 0; args[i] != NULL; i++) {
if (strcmp(args[i], s) == 0) {
match = 1;
}
}
return match;
}
static char *getenv_ex(char *s) {
char *env_var;
env_var = getenv(s);
if (!env_var || !strlen(env_var)) {
return NULL;
}
return env_var;
}
static void show_version() {
puts(CLEANPATH_VERSION);
}
static void show_usage() {
char *bname;
bname = strrchr(program, '/');
printf("usage: %s [-hVelrsv] [pattern ...]\n", bname ? bname + 1 : program);
printf(" --help -h Displays this help message\n");
printf(" --version -V Displays the program's version\n");
printf(" --exact -e Filter when pattern is an exact match (default)\n");
printf(" --loose -l Filter when any part of the pattern matches\n");
printf(" --regex -r Filter matches with (Extended) Regular Expressions " CLEANPATH_MSG_NOAVAIL "\n");
printf(" --sep [str] -s Use custom path separator (default: ':')\n");
printf(" --env [str] -E Use custom environment variable (default: PATH)\n");
}
int main(int argc, char *argv[]) {
struct CleanPath *path;
char *sep;
char *sys_var;
char *result;
size_t pattern_nelem;
int filter_mode;
int args_invalid;
char *pattern[CLEANPATH_PART_MAX];
program = argv[0];
result = NULL;
sys_var = NULL;
sep = CLEANPATH_SEP;
filter_mode = CLEANPATH_FILTER_NONE;
memset(pattern, 0, sizeof(pattern) / sizeof(char *));
pattern_nelem = 0;
args_invalid = 0;
char *args_valid[] = {
"--help", "-h",
"--version", "-V",
"--exact", "-e",
"--loose", "-l",
"--regex", "-r",
"--sep", "-s",
"--env", "-E",
NULL
};
for (int i = 1; i < argc; i++) {
if (!is_valid_arg(args_valid, argv[i])) {
fprintf(stderr, "Unknown option: %s\n", argv[i]);
args_invalid = 1;
continue;
}
if (args_invalid) {
exit(1);
}
if (ARGM("--help") || ARGM("-h")) {
show_usage();
exit(0);
}
if (ARGM("--version") || ARGM("-V")) {
show_version();
exit(0);
}
if (ARGM("--exact") || ARGM("-e")) {
filter_mode = CLEANPATH_FILTER_EXACT;
continue;
}
if (ARGM("--loose") || ARGM("-l")) {
filter_mode = CLEANPATH_FILTER_LOOSE;
continue;
}
if (ARGM("--regex") || ARGM("-r")) {
filter_mode = CLEANPATH_FILTER_REGEX;
continue;
}
if (ARGM("--sep") || ARGM("-s")) {
i++;
sep = argv[i];
continue;
}
if (ARGM("--env") || ARGM("-E")) {
i++;
sys_var = getenv_ex(argv[i]);
if (!sys_var) {
exit(1);
}
continue;
}
if (filter_mode == CLEANPATH_FILTER_NONE) {
filter_mode = CLEANPATH_FILTER_EXACT;
}
// Record filter patterns
pattern[pattern_nelem] = argv[i];
pattern_nelem++;
}
// Use default environment variable when not set by --var
if (sys_var == NULL) {
sys_var = getenv_ex(CLEANPATH_VAR);
}
// Initialize path data
path = cleanpath_init(sys_var, sep);
if (path == NULL) {
exit(1);
}
// Remove patterns from sys_var
for (size_t i = 0; pattern[i] != NULL; i++) {
cleanpath_filter(path, filter_mode, pattern[i]);
}
// Print filtered result
result = cleanpath_read(path);
printf("%s\n", result);
// Clean up
free(result);
cleanpath_free(path);
return 0;
}
|
