1 /*
2 * e_loop helper program
3 * Copyright (c) 2015, Qualcomm Atheros, Inc.
4 * All Rights Reserved.
5 * Licensed under the Clear BSD license. See README for more details.
6 */
7
8 #include <stdlib.h>
9 #include <stdio.h>
10 #include <stdarg.h>
11 #include <string.h>
12 #include <unistd.h>
13 #include <sys/wait.h>
14
15
16 char *e_loop_cmd_file = "/data/local/hs2/To_Phone/tag_file";
17 char *e_loop_log_file = "/data/local/hs2/To_Phone/Logs/e_loop.log";
18 static const char *log_file = NULL;
19 static const char *tag_file = NULL;
20
21
main(int argc,char * argv[])22 int main(int argc, char *argv[])
23 {
24 char *buf = NULL;
25 char *cmd = NULL;
26 long pos;
27 int c, ret;
28 size_t len = 0;
29 FILE *f, *f2 = NULL;
30
31 /* Set the defaults */
32 log_file = e_loop_log_file;
33 tag_file = e_loop_cmd_file;
34
35 for (;;) {
36 c = getopt(argc, argv, "l:t:");
37 if (c < 0)
38 break;
39 switch (c) {
40 case 'l':
41 log_file = optarg;
42 break;
43 case 't':
44 tag_file = optarg;
45 break;
46 default:
47 printf("usage: e_loop [-l<log_filename>] [-t<tag_filename>]\n");
48 exit(0);
49 break;
50 }
51 }
52
53 /* Main command event loop */
54 while (1) {
55 /* Wait for a tag_file with a command to process */
56 while (!(f = fopen(tag_file, "rb")))
57 sleep(1);
58
59 len = 80;
60 /* Figure out how long the file is */
61 if (fseek(f, 0, SEEK_END) < 0 || (pos = ftell(f)) < 0) {
62 fclose(f);
63 return -1;
64 }
65 len = pos;
66 if (fseek(f, 0, SEEK_SET) < 0) {
67 fclose(f);
68 return -1;
69 }
70 buf = malloc(len);
71 if (!buf) {
72 fclose(f);
73 return -1;
74 }
75 /* Read up the command line */
76 if (fread(buf, 1, len, f) != len) {
77 fclose(f);
78 free(buf);
79 return -1;
80 }
81 fclose(f);
82
83 buf[len - 1] = '\0';
84
85 if (log_file) {
86 len = strlen(buf) + strlen(log_file) + 7;
87 cmd = malloc(len);
88 if (cmd == NULL) {
89 free(buf);
90 return -1;
91 }
92 ret = snprintf(cmd, len, "%s > %s", buf, log_file);
93 if (ret < 0 || (size_t) ret >= len) {
94 free(buf);
95 free(cmd);
96 return -1;
97 }
98 free(buf);
99 buf = NULL;
100 } else {
101 cmd = buf;
102 }
103
104 cmd[len - 1] = '\0';
105
106 /*
107 * This string "cmd" will contain the command passed in by
108 * hs20-action.sh. And the name of the "logfile". Which can be
109 * monitored for the result.
110 */
111 ret = system(cmd);
112
113 if (WIFEXITED(ret)) {
114 ret = WEXITSTATUS(ret);
115 }
116
117 if ((f2 = fopen(log_file, "a")) == NULL) {
118 free(cmd);
119 return -1;
120 }
121
122 if (fprintf(f2,"\nELOOP_CMD : %s\n", cmd) <= 0) {
123 fclose(f2);
124 free(cmd);
125 return -1;
126 }
127
128 if (fprintf(f2,"\nELOOP_CMD_STATUS : %d\n", ret) <= 0) {
129 fclose(f2);
130 free(cmd);
131 return -1;
132 }
133
134 /* Only free the cmd buffer. It is all that is left allocated */
135 free(cmd);
136
137 fclose(f2);
138
139 /* Clean up */
140 unlink(tag_file);
141 }
142
143 return ret;
144 }
145