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1 | /* |
2 | * Copyright (c) 2017 Ian Sutton <ian@ce.gl> |
3 | * |
4 | * Permission to use, copy, modify, and distribute this software for any |
5 | * purpose with or without fee is hereby granted, provided that the above |
6 | * copyright notice and this permission notice appear in all copies. |
7 | * |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
15 | */ |
16 | |
17 | #include <stdio.h> |
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18 | #include <stdlib.h> |
19 | #include <unistd.h> |
20 | #include <string.h> |
21 | #include <limits.h> |
22 | #include <signal.h> |
23 | |
24 | #define LINE_SIZE 4096 |
25 | |
26 | struct config { |
27 | char *obj_path; |
28 | char *tool_path; |
29 | char *src_path; |
30 | FILE *conf; |
31 | FILE *term; |
32 | } *gcfg; |
33 | |
34 | struct sigaction sigact; |
35 | static void sigh(int); |
36 | static void sigc(void); |
37 | |
38 | static void __dead |
39 | usage(void) |
40 | { |
41 | fprintf(stderr, "usage: puffcrash [-c config] [serial console log]\n"); |
42 | exit(1); |
43 | } |
44 | |
45 | void |
46 | sigh(int sig) |
47 | { |
48 | if (sig == SIGINT) sigc(); |
49 | } |
50 | |
51 | void |
52 | sigc(void) |
53 | { |
54 | if (gcfg->obj_path) free(gcfg->obj_path); |
55 | if (gcfg->tool_path) free(gcfg->tool_path); |
56 | if (gcfg->src_path) free(gcfg->src_path); |
57 | |
58 | if (gcfg->conf) fclose(gcfg->conf); |
59 | if (gcfg->term && gcfg->term != stdin) fclose(gcfg->term); |
60 | |
61 | exit(1); |
62 | } |
63 | |
64 | int |
65 | parse_config(char *config_path, struct config *cfg) |
66 | { |
67 | char *line, *i; |
68 | int check = 0; |
69 | |
70 | cfg->conf = fopen(config_path, "r"); |
71 | |
72 | if(!(line = calloc(1, 256)) || !cfg->conf) |
73 | return 1; |
74 | |
75 | while ((fgets(line, 256, cfg->conf))) { |
76 | if (strstr(line, "obj_path")) { |
77 | i = strstr(line, "=") + 2; |
78 | strlcpy(cfg->obj_path, i, PATH_MAX); |
79 | check |= (1 << 0); |
80 | } else if (strstr(line, "tool_path")) { |
81 | i = strstr(line, "=") + 2; |
82 | strlcpy(cfg->tool_path, i, PATH_MAX); |
83 | check |= (1 << 1); |
84 | } else if (strstr(line, "src_path")) { |
85 | i = strstr(line, "=") + 2; |
86 | strlcpy(cfg->src_path, i, PATH_MAX); |
87 | check |= (1 << 2); |
88 | } |
89 | } |
90 | |
91 | free(line); |
92 | |
93 | if (check == 0x7) |
94 | return 0; |
95 | else |
96 | return 1; |
97 | } |
98 | |
99 | void |
100 | watch_serial(void) |
101 | { |
102 | char *line; |
103 | |
104 | if (!(line = calloc(1, LINE_SIZE))) { |
105 | printf("could not allocate memory\n"); |
106 | sigc(); |
107 | } |
108 | |
109 | while ((fgets(line, LINE_SIZE, gcfg->term))) { |
110 | printf("%s", line); |
111 | } |
112 | } |
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113 | |
114 | int |
115 | main(int argc, char *argv[]) |
116 | { |
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117 | struct config cfg; |
118 | int ch; |
119 | char term_path[PATH_MAX], config_path[PATH_MAX]; |
120 | |
121 | bzero(&cfg, sizeof(struct config)); |
122 | strlcpy(config_path, "/etc/puffcrash.conf", PATH_MAX); |
123 | |
124 | atexit(sigc); |
125 | sigact.sa_handler = sigh; |
126 | sigemptyset(&sigact.sa_mask); |
127 | sigact.sa_flags = 0; |
128 | sigaction(SIGINT, &sigact, (struct sigaction *) NULL); |
129 | |
130 | while ((ch = getopt(argc, argv, "c:")) != -1) { |
131 | switch (ch) { |
132 | case 'c': |
133 | strlcpy(config_path, optarg, PATH_MAX); |
134 | break; |
135 | default: |
136 | usage(); |
137 | break; |
138 | } |
139 | } |
140 | |
141 | argv += optind; |
142 | argc -= optind; |
143 | |
144 | cfg.obj_path = calloc(1, PATH_MAX); |
145 | cfg.tool_path = calloc(1, PATH_MAX); |
146 | cfg.src_path = calloc(1, PATH_MAX); |
147 | |
148 | gcfg = &cfg; |
149 | |
150 | if (parse_config(config_path, &cfg)) { |
151 | printf("failed to parse config file %s.\n", config_path); |
152 | sigc(); |
153 | } |
154 | |
155 | if (argc) { |
156 | strlcpy(term_path, argv[0], PATH_MAX); |
157 | cfg.term = fopen(term_path, "r"); |
158 | } else |
159 | cfg.term = stdin; |
160 | |
161 | if (!cfg.term) { |
162 | printf("failed to open serial console output logfile \"%s\"\n", argv[0]); |
163 | sigc(); |
164 | } |
165 | |
166 | watch_serial(); |
167 | |
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168 | return 0; |
169 | } |