Author: Kevin Schoon [me@kevinschoon.com]

Hash: 692b5b172a3317795c136ab336af13c520aa1be6

Timestamp: Thu, 06 Apr 2023 00:38:03 +0000 (1 year ago)

+108 -0 +/-3 browse

rewrite in c (WIP)

1	diff --git a/.gitignore b/.gitignore
2	index 4b0ab6f..44bc5a2 100644
3	--- a/.gitignore
4	+++ b/.gitignore
5	@@ -1,3 +1,5 @@
6	pkg
7	src
8	+ bin
9	+ .ccls-cache
10	*.tar.zst
11	diff --git a/Makefile b/Makefile
12	new file mode 100644
13	index 0000000..4ee1724
14	--- /dev/null
15	+++ b/Makefile
16	@@ -0,0 +1,5 @@
17	+ default: bin
18	+ gcc main.c -o bin/main
19	+
20	+ bin:
21	+ mkdir -p bin
22	diff --git a/main.c b/main.c
23	new file mode 100644
24	index 0000000..3c552b0
25	--- /dev/null
26	+++ b/main.c
27	@@ -0,0 +1,101 @@
28	+ #include <regex.h>
29	+ #include <stdio.h>
30	+ #include <stdlib.h>
31	+ #include <string.h>
32	+
33	+ #define _MONITOR_REGEXP "unix:\\([-/.[:alnum:]]*\\)"
34	+ #define _SPICE_REGEXP ".*addr=\\([-/.[:alnum:]]*\\)"
35	+
36	+ char *_get_arg_by_name(int argc, char *argv[], char *name) {
37	+ char *res;
38	+ int i;
39	+ for (i = 0; i < argc; i++) {
40	+ if (strcmp(argv[i], name) == 0 && (i < argc)) {
41	+ res = malloc(strlen(argv[i + 1]));
42	+ strcpy(res, argv[i + 1]);
43	+ return res;
44	+ }
45	+ }
46	+ return NULL;
47	+ };
48	+
49	+ char *_get_arg_with_regexp(int argc, char *argv[], char *name,
50	+ char *expression) {
51	+ char *arg_raw;
52	+ arg_raw = _get_arg_by_name(argc, argv, name);
53	+ if (arg_raw == NULL) {
54	+ return NULL;
55	+ }
56	+
57	+ regex_t regex;
58	+ regmatch_t groups[2];
59	+
60	+ if (regcomp(&regex, expression, 0) != 0) {
61	+ fprintf(stderr, "regexp failed to compile\n");
62	+ exit(1);
63	+ }
64	+
65	+ char *result = malloc(strlen(arg_raw) + 1);
66	+
67	+ if (regexec(&regex, arg_raw, 2, groups, 0) == 0) {
68	+ if (groups[1].rm_so == (size_t)-1) {
69	+ fprintf(stderr, "cannot match against -montor flag:'%s'\n", arg_raw);
70	+ exit(1);
71	+ }
72	+ strcpy(result, arg_raw);
73	+ result[groups[1].rm_eo] = 0;
74	+ result = result + groups[1].rm_so;
75	+ } else {
76	+ fprintf(stderr, "cannot match against -montor flag:'%s'\n", arg_raw);
77	+ exit(1);
78	+ }
79	+
80	+ regfree(&regex);
81	+ return result;
82	+ }
83	+
84	+ int main(int argc, char *argv[]) {
85	+ char *name;
86	+ name = _get_arg_by_name(argc, argv, "-name");
87	+ int result;
88	+ if (name == NULL) {
89	+ printf("-name flag was not specified\n");
90	+ return EXIT_FAILURE;
91	+ }
92	+ printf("NAME: %s\n", name);
93	+ char *monitor_path;
94	+ monitor_path = _get_arg_with_regexp(argc, argv, "-monitor", _MONITOR_REGEXP);
95	+ if (monitor_path == NULL) {
96	+ printf("-monitor flag was not specified");
97	+ return EXIT_FAILURE;
98	+ }
99	+ printf("MONITOR: %s\n", monitor_path);
100	+ char *spice_path;
101	+ spice_path = _get_arg_with_regexp(argc, argv, "-spice", _SPICE_REGEXP);
102	+ if (spice_path != NULL) {
103	+ printf("SPICE: %s\n", spice_path);
104	+ }
105	+
106	+ /* CATCH SIGNAL TODO */
107	+ /* POPEN TODO */
108	+
109	+ /*
110	+ FILE *fp;
111	+ int status;
112	+ char buf[128];
113	+ fp = popen("ls", "r");
114	+ if (fp == NULL) {
115	+ puts("failed to open process");
116	+ return EXIT_FAILURE;
117	+ }
118	+ while (fgets(buf, 128, fp) != NULL) {
119	+ printf("%s", buf);
120	+ }
121	+ status = pclose(fp);
122	+ if (status != 0) {
123	+ printf("non-zero exit code");
124	+ return status;
125	+ }
126	+ return EXIT_SUCCESS;
127	+ */
128	+ }