Mercurial > hg > nginx
annotate src/os/unix/ngx_errno.c @ 7516:36c52a0f6ded
Perl: disabled not_modified filter (ticket #1786).
Embedded perl does not set any request fields needed for conditional
requests processing. Further, filter finalization in the not_modified
filter can cause segmentation faults due to cleared ctx as in
ticket #1786.
Before 5fb1e57c758a (1.7.3) the not_modified filter was implicitly disabled
for perl responses, as r->headers_out.last_modified_time was -1. This
change restores this behaviour by using the explicit r->disable_not_modified
flag.
Note that this patch doesn't try to address perl module robustness against
filter finalization and other errors returned from filter chains. It should
be eventually reworked to handle errors instead of ignoring them.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Mon, 17 Jun 2019 19:48:56 +0300 |
parents | f1a0de6eb505 |
children | 8cc5b0365ee5 |
rev | line source |
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441
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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. |
441
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5 */ |
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6 |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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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 } |