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1 #include <stdio.h>
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2 #include <stdlib.h>
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3
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4 #include <uv.h>
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5
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6 uv_loop_t *loop;
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7 const char *command;
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8
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9 void run_command(uv_fs_event_t *handle, const char *filename, int events, int status) {
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10 char path[1024];
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11 size_t size = 1023;
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12 // Does not handle error if path is longer than 1023.
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13 uv_fs_event_getpath(handle, path, &size);
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14 path[size] = '\0';
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15
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16 fprintf(stderr, "Change detected in %s: ", path);
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17 if (events & UV_RENAME)
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18 fprintf(stderr, "renamed");
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19 if (events & UV_CHANGE)
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20 fprintf(stderr, "changed");
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21
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22 fprintf(stderr, " %s\n", filename ? filename : "");
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23 system(command);
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24 }
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25
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26 int main(int argc, char **argv) {
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27 if (argc <= 2) {
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28 fprintf(stderr, "Usage: %s <command> <file1> [file2 ...]\n", argv[0]);
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29 return 1;
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30 }
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31
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32 loop = uv_default_loop();
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33 command = argv[1];
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34
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35 while (argc-- > 2) {
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36 fprintf(stderr, "Adding watch on %s\n", argv[argc]);
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37 uv_fs_event_t *fs_event_req = malloc(sizeof(uv_fs_event_t));
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38 uv_fs_event_init(loop, fs_event_req);
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39 // The recursive flag watches subdirectories too.
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40 uv_fs_event_start(fs_event_req, run_command, argv[argc], UV_FS_EVENT_RECURSIVE);
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41 }
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42
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43 return uv_run(loop, UV_RUN_DEFAULT);
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44 }
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