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use a proper commandline interface, complete with a help option that'…
…s actually helpful.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| #include <getopt.h> | ||
| #include "cli.h" | ||
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| const char *cli_info_purpose = "A flexible command-line interface for the FSEvents API"; | ||
| const char *cli_info_usage = "Usage: fsevent_watch [OPTIONS]... [PATHS]..."; | ||
| const char *cli_info_help[] = { | ||
| " -h, --help you're looking at it", | ||
| " -V, --version print version number and exit", | ||
| " -s, --since-when=EventID fire historical events since ID", | ||
| " -l, --latency=seconds latency period (default='0.5')", | ||
| " -n, --no-defer enable no-defer latency modifier", | ||
| " -r, --watch-root watch for when the root path has changed", | ||
| " -i, --ignore-self ignore current process", | ||
| " -F, --file-events provide file level event data", | ||
| " -f, --format=name output format (classic, niw)", | ||
| 0 | ||
| }; | ||
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| static void default_args (struct cli_info *args_info) | ||
| { | ||
| // args_info->since_when_arg = 0xFFFFFFFFFFFFFFFFULL; | ||
| args_info->since_when_arg = kFSEventStreamEventIdSinceNow; | ||
| args_info->latency_arg = 0.5; | ||
| args_info->no_defer_flag = false; | ||
| args_info->watch_root_flag = false; | ||
| args_info->ignore_self_flag = false; | ||
| args_info->file_events_flag = false; | ||
| args_info->format_arg = format_arg_classic; | ||
| } | ||
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| static void cli_parser_release (struct cli_info *args_info) | ||
| { | ||
| unsigned int i; | ||
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| for (i=0; i < args_info->inputs_num; ++i) | ||
| free(args_info->inputs[i]); | ||
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| if (args_info->inputs_num) | ||
| free(args_info->inputs); | ||
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| args_info->inputs_num = 0; | ||
| } | ||
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| void cli_parser_init (struct cli_info *args_info) | ||
| { | ||
| default_args(args_info); | ||
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| args_info->inputs = 0; | ||
| args_info->inputs_num = 0; | ||
| } | ||
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| void cli_parser_free (struct cli_info *args_info) | ||
| { | ||
| cli_parser_release(args_info); | ||
| } | ||
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| void cli_print_version (void) | ||
| { | ||
| printf("%s %s\n", CLI_NAME, CLI_VERSION); | ||
| } | ||
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| void cli_print_help (void) | ||
| { | ||
| cli_print_version(); | ||
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| printf("\n%s\n", cli_info_purpose); | ||
| printf("\n%s\n", cli_info_usage); | ||
| printf("\n"); | ||
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| int i = 0; | ||
| while (cli_info_help[i]) { | ||
| printf("%s\n", cli_info_help[i++]); | ||
| } | ||
| } | ||
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| int cli_parser (int argc, const char **argv, struct cli_info *args_info) | ||
| { | ||
| static struct option longopts[] = { | ||
| { "help", no_argument, NULL, 'h' }, | ||
| { "version", no_argument, NULL, 'V' }, | ||
| { "since-when", required_argument, NULL, 's' }, | ||
| { "latency", required_argument, NULL, 'l' }, | ||
| { "no-defer", no_argument, NULL, 'n' }, | ||
| { "watch-root", no_argument, NULL, 'r' }, | ||
| { "ignore-self", no_argument, NULL, 'i' }, | ||
| { "file-events", no_argument, NULL, 'F' }, | ||
| { "format", required_argument, NULL, 'f' }, | ||
| { 0, 0, 0, 0 } | ||
| }; | ||
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| const char *shortopts = "hVs:l:nriFf:"; | ||
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| int c = -1; | ||
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| while ((c = getopt_long(argc, (char * const *)argv, shortopts, longopts, NULL)) != -1) | ||
| { | ||
| switch(c) | ||
| { | ||
| case 's': // since-when | ||
| args_info->since_when_arg = strtoull(optarg, NULL, 0); | ||
| break; | ||
| case 'l': // latency | ||
| args_info->latency_arg = strtod(optarg, NULL); | ||
| break; | ||
| case 'n': // no-defer | ||
| args_info->no_defer_flag = true; | ||
| break; | ||
| case 'r': // watch-root | ||
| args_info->watch_root_flag = true; | ||
| break; | ||
| case 'i': // ignore-self | ||
| args_info->ignore_self_flag = true; | ||
| break; | ||
| case 'F': // file-events | ||
| args_info->file_events_flag = true; | ||
| break; | ||
| case 'f': // format | ||
| if (strcmp(optarg, "classic") == 0) { | ||
| args_info->format_arg = format_arg_classic; | ||
| } else if (strcmp(optarg, "niw") == 0) { | ||
| args_info->format_arg = format_arg_niw; | ||
| } else { | ||
| fprintf(stderr, "Unknown output format: %s\n", optarg); | ||
| exit(EXIT_FAILURE); | ||
| } | ||
| break; | ||
| case 'V': // version | ||
| cli_print_version(); | ||
| exit(EXIT_SUCCESS); | ||
| break; | ||
| case 'h': // help | ||
| case '?': // invalid option | ||
| case ':': // missing argument | ||
| cli_print_help(); | ||
| exit((c == 'h') ? EXIT_SUCCESS : EXIT_FAILURE); | ||
| break; | ||
| } | ||
| } | ||
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| if (optind < argc) | ||
| { | ||
| int i = 0; | ||
| args_info->inputs_num = argc - optind; | ||
| args_info->inputs = | ||
| (char **)(malloc ((args_info->inputs_num)*sizeof(char *))); | ||
| while (optind < argc) | ||
| if (argv[optind++] != argv[0]) | ||
| args_info->inputs[i++] = strdup(argv[optind-1]); | ||
| } | ||
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| return EXIT_SUCCESS; | ||
| } | ||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| // | ||
| // cli.h | ||
| // fsevent_watch | ||
| // | ||
| // Copyright (c) 2011 Travis Tilley. All rights reserved. | ||
| // | ||
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| #ifndef CLI_H | ||
| #define CLI_H | ||
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| #define CLI_NAME "fsevent_watch" | ||
| #define CLI_VERSION "0.0.1" | ||
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| #include "common.h" | ||
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| enum output_format { | ||
| format_arg_classic = 0, | ||
| format_arg_niw | ||
| }; | ||
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| struct cli_info { | ||
| UInt64 since_when_arg; | ||
| double latency_arg; | ||
| bool no_defer_flag; | ||
| bool watch_root_flag; | ||
| bool ignore_self_flag; | ||
| bool file_events_flag; | ||
| enum output_format format_arg; | ||
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| char **inputs; | ||
| unsigned inputs_num; | ||
| }; | ||
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| extern const char *cli_info_purpose; | ||
| extern const char *cli_info_usage; | ||
| extern const char *cli_info_help[]; | ||
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| void cli_print_help(void); | ||
| void cli_print_version(void); | ||
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| int cli_parser (int argc, const char **argv, struct cli_info *args_info); | ||
| void cli_parser_init (struct cli_info *args_info); | ||
| void cli_parser_free (struct cli_info *args_info); | ||
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| #endif /* CLI_H */ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| // | ||
| // common.h | ||
| // fsevent_watch | ||
| // | ||
| // Copyright (c) 2011 Travis Tilley. All rights reserved. | ||
| // | ||
|
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| #ifndef fsevent_watch_common_h | ||
| #define fsevent_watch_common_h | ||
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| #include <CoreServices/CoreServices.h> | ||
| #include "compat.h" | ||
|
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| #endif |
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