Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_errno.c @ 5739:6e4bb1d6679d
Configure: style.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Thu, 26 Jun 2014 03:34:02 +0400 |
parents | f1a0de6eb505 |
children | 8cc5b0365ee5 |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
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5 */ |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 |
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11 |
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12 /* |
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13 * The strerror() messages are copied because: |
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14 * |
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15 * 1) strerror() and strerror_r() functions are not Async-Signal-Safe, |
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16 * therefore, they cannot be used in signal handlers; |
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17 * |
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18 * 2) a direct sys_errlist[] array may be used instead of these functions, |
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19 * but Linux linker warns about its usage: |
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20 * |
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21 * warning: `sys_errlist' is deprecated; use `strerror' or `strerror_r' instead |
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22 * warning: `sys_nerr' is deprecated; use `strerror' or `strerror_r' instead |
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23 * |
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24 * causing false bug reports. |
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25 */ |
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26 |
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27 |
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28 static ngx_str_t *ngx_sys_errlist; |
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29 static ngx_str_t ngx_unknown_error = ngx_string("Unknown error"); |
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30 |
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31 |
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32 u_char * |
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33 ngx_strerror(ngx_err_t err, u_char *errstr, size_t size) |
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34 { |
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35 ngx_str_t *msg; |
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36 |
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37 msg = ((ngx_uint_t) err < NGX_SYS_NERR) ? &ngx_sys_errlist[err]: |
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38 &ngx_unknown_error; |
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39 size = ngx_min(size, msg->len); |
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40 |
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41 return ngx_cpymem(errstr, msg->data, size); |
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42 } |
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43 |
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44 |
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45 ngx_int_t |
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46 ngx_strerror_init(void) |
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47 { |
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48 char *msg; |
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49 u_char *p; |
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50 size_t len; |
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51 ngx_err_t err; |
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52 |
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53 /* |
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54 * ngx_strerror() is not ready to work at this stage, therefore, |
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55 * malloc() is used and possible errors are logged using strerror(). |
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56 */ |
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57 |
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58 len = NGX_SYS_NERR * sizeof(ngx_str_t); |
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59 |
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60 ngx_sys_errlist = malloc(len); |
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61 if (ngx_sys_errlist == NULL) { |
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62 goto failed; |
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63 } |
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64 |
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65 for (err = 0; err < NGX_SYS_NERR; err++) { |
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66 msg = strerror(err); |
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67 len = ngx_strlen(msg); |
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68 |
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69 p = malloc(len); |
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70 if (p == NULL) { |
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71 goto failed; |
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72 } |
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73 |
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74 ngx_memcpy(p, msg, len); |
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75 ngx_sys_errlist[err].len = len; |
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76 ngx_sys_errlist[err].data = p; |
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77 } |
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78 |
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79 return NGX_OK; |
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80 |
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81 failed: |
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82 |
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83 err = errno; |
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84 ngx_log_stderr(0, "malloc(%uz) failed (%d: %s)", len, err, strerror(err)); |
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85 |
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86 return NGX_ERROR; |
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87 } |