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1 /* Copyright libuv project contributors. All rights reserved.
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2 *
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3 * Permission is hereby granted, free of charge, to any person obtaining a copy
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4 * of this software and associated documentation files (the "Software"), to
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5 * deal in the Software without restriction, including without limitation the
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6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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7 * sell copies of the Software, and to permit persons to whom the Software is
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8 * furnished to do so, subject to the following conditions:
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9 *
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10 * The above copyright notice and this permission notice shall be included in
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11 * all copies or substantial portions of the Software.
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12 *
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13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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19 * IN THE SOFTWARE.
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20 */
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21
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22 #include "uv.h"
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23 #include "internal.h"
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24
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25 #include <stdint.h>
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26 #include <stdlib.h>
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27 #include <string.h>
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28
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29 #include <sys/types.h>
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30
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31 #include <sys/time.h>
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32 #include <unistd.h>
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33
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34 #include <procinfo.h>
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35
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36 #include <ctype.h>
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37
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38 extern char* original_exepath;
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39 extern uv_mutex_t process_title_mutex;
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40 extern uv_once_t process_title_mutex_once;
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41 extern void init_process_title_mutex_once(void);
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42
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43 uint64_t uv__hrtime(uv_clocktype_t type) {
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44 uint64_t G = 1000000000;
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45 timebasestruct_t t;
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46 read_wall_time(&t, TIMEBASE_SZ);
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47 time_base_to_time(&t, TIMEBASE_SZ);
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48 return (uint64_t) t.tb_high * G + t.tb_low;
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49 }
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50
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51
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52 /*
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53 * We could use a static buffer for the path manipulations that we need outside
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54 * of the function, but this function could be called by multiple consumers and
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55 * we don't want to potentially create a race condition in the use of snprintf.
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56 * There is no direct way of getting the exe path in AIX - either through /procfs
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57 * or through some libc APIs. The below approach is to parse the argv[0]'s pattern
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58 * and use it in conjunction with PATH environment variable to craft one.
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59 */
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60 int uv_exepath(char* buffer, size_t* size) {
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61 int res;
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62 char args[UV__PATH_MAX];
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63 size_t cached_len;
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64 struct procsinfo pi;
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65
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66 if (buffer == NULL || size == NULL || *size == 0)
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67 return UV_EINVAL;
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68
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69 uv_once(&process_title_mutex_once, init_process_title_mutex_once);
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70 uv_mutex_lock(&process_title_mutex);
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71 if (original_exepath != NULL) {
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72 cached_len = strlen(original_exepath);
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73 *size -= 1;
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74 if (*size > cached_len)
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75 *size = cached_len;
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76 memcpy(buffer, original_exepath, *size);
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77 buffer[*size] = '\0';
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78 uv_mutex_unlock(&process_title_mutex);
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79 return 0;
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80 }
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81 uv_mutex_unlock(&process_title_mutex);
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82 pi.pi_pid = getpid();
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83 res = getargs(&pi, sizeof(pi), args, sizeof(args));
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84
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85 if (res < 0)
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86 return UV_EINVAL;
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87
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88 return uv__search_path(args, buffer, size);
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89 }
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