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comparison rvinterf/etmsync/fsnew.c @ 321:0cb766828d7a

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fc-fsio: implemented write-battery-table and write-charging-config commands
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 17 Dec 2017 03:31:54 +0000
parents
children 003e48f8ebe1
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320:7572c35a768a 321:0cb766828d7a
1 /*
2 * In this module we are going to implement the commands that upload
3 * new FreeCalypso-invented stuff into the FFS of our FC devices.
4 */
5
6 #include <sys/wait.h>
7 #include <stdio.h>
8 #include <stdlib.h>
9 #include <unistd.h>
10 #include "exitcodes.h"
11
12 char batterytab_compile_tool[] = "/opt/freecalypso/bin/compile-fc-batt";
13 char charging_compile_tool[] = "/opt/freecalypso/bin/compile-fc-chg";
14
15 upload_fc_table_from_ascii(asciisrc, compiletool, ffs_pathname)
16 char *asciisrc, *compiletool, *ffs_pathname;
17 {
18 char tmpfile[] = "/tmp/fc-fsioXXXXXX";
19 int tmpfd;
20 pid_t child, waitres;
21 int status, rc;
22
23 tmpfd = mkstemp(tmpfile);
24 if (tmpfd < 0) {
25 fprintf(stderr, "unable to get temp file via mkstemp()\n");
26 return(ERROR_UNIX);
27 }
28 close(tmpfd);
29 child = vfork();
30 if (child < 0) {
31 fprintf(stderr, "unable to vfork to run compiler tool\n");
32 unlink(tmpfile);
33 return(ERROR_UNIX);
34 }
35 if (!child) {
36 execl(compiletool, compiletool, asciisrc, tmpfile, 0);
37 perror(compiletool);
38 _exit(ERROR_UNIX);
39 }
40 waitres = waitpid(child, &status, 0);
41 if (waitres != child || !WIFEXITED(status)) {
42 fprintf(stderr, "unexpected wait result after compiler run\n");
43 unlink(tmpfile);
44 return(ERROR_UNIX);
45 }
46 rc = WEXITSTATUS(status);
47 if (rc) {
48 unlink(tmpfile);
49 return rc;
50 }
51 rc = fwrite_from_file(ffs_pathname, tmpfile);
52 unlink(tmpfile);
53 return rc;
54 }
55
56 cmd_write_battery_table(argc, argv)
57 char **argv;
58 {
59 return upload_fc_table_from_ascii(argv[1], batterytab_compile_tool,
60 "/etc/batterytab");
61 }
62
63 cmd_write_charging_config(argc, argv)
64 char **argv;
65 {
66 return upload_fc_table_from_ascii(argv[1], charging_compile_tool,
67 "/etc/charging");
68 }