Mercurial > hg > nginx

annotate src/os/unix/ngx_errno.c @ 7670:ccb5ff87ab3e

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Cache: introduced min_free cache clearing. Clearing cache based on free space left on a file system is expected to allow better disk utilization in some cases, notably when disk space might be also used for something other than nginx cache (including nginx own temporary files) and while loading cache (when cache size might be inaccurate for a while, effectively disabling max_size cache clearing). Based on a patch by Adam Bambuch.
author Maxim Dounin <mdounin@mdounin.ru>
date Mon, 22 Jun 2020 18:03:00 +0300
parents f1a0de6eb505
children 8cc5b0365ee5
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents: 305
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents: 305
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2 /*
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42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
Igor Sysoev <igor@sysoev.ru>
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3 * Copyright (C) Igor Sysoev
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d620f497c50f Copyright updated.
Maxim Konovalov <maxim@nginx.com>
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4 * Copyright (C) Nginx, Inc.
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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5 */
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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00cafae0bdf1 nginx-0.0.1-2003-12-14-23:10:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
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8 #include <ngx_config.h>
00cafae0bdf1 nginx-0.0.1-2003-12-14-23:10:27 import
Igor Sysoev <igor@sysoev.ru>
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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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59b99f217c6d Replaced "can not" with "cannot" and "could not" in a bunch of places.
Ruslan Ermilov <ru@nginx.com>
parents: 3787
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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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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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fd9fecc4193f nginx-0.0.1-2003-12-15-16:57:13 import
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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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44
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f1a0de6eb505 Fixed return type of ngx_strerror_init().
Maxim Dounin <mdounin@mdounin.ru>
parents: 4412
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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 }
8e39cab6abd5 nginx-0.0.2-2004-02-10-19:23:38 import
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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 }