FreeCalypso > hg > freecalypso-tools
view rvinterf/etmsync/help.c @ 921:74d284add54d
fc-fsio: guard against bogus readdir results from the target
If the FFS being operated on contains SE K2x0 extended filenames,
readdir will return strings that are bad for printing. We need to
guard against this possibility, and also against possible other
bogosity that could be sent by other alien firmwares.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sat, 31 Dec 2022 22:55:23 +0000 |
parents | 24cb10d508d7 |
children |
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/* * This module implements the fc-fsio help facility. */ #include <stdio.h> #include <ctype.h> #include <string.h> #include <strings.h> #include <stdlib.h> #include "exitcodes.h" extern char help_file_pathname[]; show_help_topic(topic) char *topic; { FILE *f; char linebuf[256]; char *cp, *np; int flag; f = fopen(help_file_pathname, "r"); if (!f) { perror(help_file_pathname); return(ERROR_UNIX); } for (;;) { if (!fgets(linebuf, sizeof linebuf, f)) { fprintf(stderr, "Help topic \"%s\" not found\n", topic); fclose(f); return(ERROR_USAGE); } if (linebuf[0] != '=' || linebuf[1] != '=' || linebuf[2] != '=') continue; for (cp = linebuf + 3; isspace(*cp); cp++) ; for (np = cp; *cp && !isspace(*cp); cp++) ; if (*cp) *cp++ = '\0'; if (!strcmp(np, topic)) break; } for (flag = 0; fgets(linebuf, sizeof linebuf, f); ) { if (linebuf[0] == '=' && linebuf[1] == '=' && linebuf[2] == '=') { if (flag) break; else continue; } fputs(linebuf, stdout); flag = 1; } fclose(f); return(0); } cmd_help(argc, argv) char **argv; { switch (argc) { case 1: return show_help_topic("main"); case 2: return show_help_topic(argv[1]); default: fprintf(stderr, "internal error in cmd_help(): bad argc\n"); abort(); } }