FreeCalypso > hg > freecalypso-tools

comparison rvinterf/etmsync/help.c @ 27:24cb10d508d7

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
fc-fsio help command implemented
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 23 Oct 2016 01:33:21 +0000
parents
children
comparison
equal deleted inserted replaced
26:b301b75de0e0 27:24cb10d508d7
1 /*
2 * This module implements the fc-fsio help facility.
3 */
4
5 #include <stdio.h>
6 #include <ctype.h>
7 #include <string.h>
8 #include <strings.h>
9 #include <stdlib.h>
10 #include "exitcodes.h"
11
12 extern char help_file_pathname[];
13
14 show_help_topic(topic)
15 char *topic;
16 {
17 FILE *f;
18 char linebuf[256];
19 char *cp, *np;
20 int flag;
21
22 f = fopen(help_file_pathname, "r");
23 if (!f) {
24 perror(help_file_pathname);
25 return(ERROR_UNIX);
26 }
27 for (;;) {
28 if (!fgets(linebuf, sizeof linebuf, f)) {
29 fprintf(stderr, "Help topic \"%s\" not found\n", topic);
30 fclose(f);
31 return(ERROR_USAGE);
32 }
33 if (linebuf[0] != '=' || linebuf[1] != '=' || linebuf[2] != '=')
34 continue;
35 for (cp = linebuf + 3; isspace(*cp); cp++)
36 ;
37 for (np = cp; *cp && !isspace(*cp); cp++)
38 ;
39 if (*cp)
40 *cp++ = '\0';
41 if (!strcmp(np, topic))
42 break;
43 }
44 for (flag = 0; fgets(linebuf, sizeof linebuf, f); ) {
45 if (linebuf[0] == '=' && linebuf[1] == '=' &&
46 linebuf[2] == '=') {
47 if (flag)
48 break;
49 else
50 continue;
51 }
52 fputs(linebuf, stdout);
53 flag = 1;
54 }
55 fclose(f);
56 return(0);
57 }
58
59 cmd_help(argc, argv)
60 char **argv;
61 {
62 switch (argc) {
63 case 1:
64 return show_help_topic("main");
65 case 2:
66 return show_help_topic(argv[1]);
67 default:
68 fprintf(stderr, "internal error in cmd_help(): bad argc\n");
69 abort();
70 }
71 }