nginx: src/os/unix/ngx_errno.c annotate

annotate src/os/unix/ngx_errno.c @ 7784:8cc5b0365ee5

Improved maximum errno detection. Previously, systems without sys_nerr (or _sys_nerr) were handled with an assumption that errors start at 0 and continuous. This is, however, not something POSIX requires, and not true on some platforms. Notably, on Linux, where sys_nerr is no longer available for newly linked binaries starting with glibc 2.32, there are gaps in error list, which used to stop us from properly detecting maximum errno. Further, on GNU/Hurd errors start at 0x40000001. With this change, maximum errno detection is moved to the runtime code, now able to ignore gaps, and also detects the first error if needed. This fixes observed "Unknown error" messages as seen on Linux with glibc 2.32 and on GNU/Hurd.

author	Maxim Dounin <mdounin@mdounin.ru>
date	Mon, 01 Mar 2021 20:00:43 +0300
parents	f1a0de6eb505
children	c43a2e8fdf7e

rev	line source
441 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 diff changeset	1
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 diff changeset	2 /*
444 42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright Igor Sysoev <igor@sysoev.ru> parents: 441 diff changeset	3 * Copyright (C) Igor Sysoev
4412 d620f497c50f Copyright updated. Maxim Konovalov <maxim@nginx.com> parents: 4133 diff changeset	4 * Copyright (C) Nginx, Inc.
441 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 diff changeset	5 */
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 diff changeset	6
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 diff changeset	7
210 00cafae0bdf1 nginx-0.0.1-2003-12-14-23:10:27 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	8 #include <ngx_config.h>
00cafae0bdf1 nginx-0.0.1-2003-12-14-23:10:27 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	9 #include <ngx_core.h>
00cafae0bdf1 nginx-0.0.1-2003-12-14-23:10:27 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	10
00cafae0bdf1 nginx-0.0.1-2003-12-14-23:10:27 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	11
3787 e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	12 /*
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	13 * The strerror() messages are copied because:
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	14 *
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	15 * 1) strerror() and strerror_r() functions are not Async-Signal-Safe,
4133 59b99f217c6d Replaced "can not" with "cannot" and "could not" in a bunch of places. Ruslan Ermilov <ru@nginx.com> parents: 3787 diff changeset	16 * therefore, they cannot be used in signal handlers;
3787 e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	17 *
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	18 * 2) a direct sys_errlist[] array may be used instead of these functions,
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	19 * but Linux linker warns about its usage:
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	20 *
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	21 * warning: `sys_errlist' is deprecated; use `strerror' or `strerror_r' instead
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	22 * warning: `sys_nerr' is deprecated; use `strerror' or `strerror_r' instead
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	23 *
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	24 * causing false bug reports.
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	25 */
210 00cafae0bdf1 nginx-0.0.1-2003-12-14-23:10:27 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	26
00cafae0bdf1 nginx-0.0.1-2003-12-14-23:10:27 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	27
3787 e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	28 static ngx_str_t *ngx_sys_errlist;
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	29 static ngx_str_t ngx_unknown_error = ngx_string("Unknown error");
7784 8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	30 static ngx_err_t ngx_first_error;
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	31 static ngx_err_t ngx_last_error;
211 fd9fecc4193f nginx-0.0.1-2003-12-15-16:57:13 import Igor Sysoev <igor@sysoev.ru> parents: 210 diff changeset	32
256 8e39cab6abd5 nginx-0.0.2-2004-02-10-19:23:38 import Igor Sysoev <igor@sysoev.ru> parents: 211 diff changeset	33
2335 3d8ab5957202 ngx_strerror_r() style and size == 0 bug fix Igor Sysoev <igor@sysoev.ru> parents: 501 diff changeset	34 u_char *
3787 e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	35 ngx_strerror(ngx_err_t err, u_char *errstr, size_t size)
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	36 {
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	37 ngx_str_t *msg;
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	38
7784 8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	39 if (err >= ngx_first_error && err < ngx_last_error) {
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	40 msg = &ngx_sys_errlist[err - ngx_first_error];
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	41
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	42 } else {
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	43 msg = &ngx_unknown_error;
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	44 }
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	45
3787 e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	46 size = ngx_min(size, msg->len);
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	47
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	48 return ngx_cpymem(errstr, msg->data, size);
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	49 }
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	50
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	51
4693 f1a0de6eb505 Fixed return type of ngx_strerror_init(). Maxim Dounin <mdounin@mdounin.ru> parents: 4412 diff changeset	52 ngx_int_t
3787 e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	53 ngx_strerror_init(void)
256 8e39cab6abd5 nginx-0.0.2-2004-02-10-19:23:38 import Igor Sysoev <igor@sysoev.ru> parents: 211 diff changeset	54 {
3787 e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	55 char *msg;
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	56 u_char *p;
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	57 size_t len;
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	58 ngx_err_t err;
256 8e39cab6abd5 nginx-0.0.2-2004-02-10-19:23:38 import Igor Sysoev <igor@sysoev.ru> parents: 211 diff changeset	59
7784 8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	60 #if (NGX_SYS_NERR)
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	61 ngx_first_error = 0;
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	62 ngx_last_error = NGX_SYS_NERR;
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	63
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	64 #elif (EPERM > 1000 && EPERM < 0x7fffffff - 1000)
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	65
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	66 /*
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	67 * If number of errors is not known, and EPERM error code has large
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	68 * but reasonable value, guess possible error codes based on the error
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	69 * messages returned by strerror(), starting from EPERM. Notably,
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	70 * this covers GNU/Hurd, where errors start at 0x40000001.
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	71 */
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	72
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	73 for (err = EPERM; err > EPERM - 1000; err--) {
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	74 ngx_set_errno(0);
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	75 msg = strerror(err);
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	76
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	77 if (errno == EINVAL
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	78 \|\| msg == NULL
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	79 \|\| strncmp(msg, "Unknown error", 13) == 0)
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	80 {
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	81 continue;
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	82 }
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	83
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	84 ngx_first_error = err;
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	85 }
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	86
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	87 for (err = EPERM; err < EPERM + 1000; err++) {
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	88 ngx_set_errno(0);
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	89 msg = strerror(err);
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	90
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	91 if (errno == EINVAL
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	92 \|\| msg == NULL
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	93 \|\| strncmp(msg, "Unknown error", 13) == 0)
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	94 {
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	95 continue;
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	96 }
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	97
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	98 ngx_last_error = err + 1;
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	99 }
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	100
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	101 #else
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	102
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	103 /*
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	104 * If number of errors is not known, guess it based on the error
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	105 * messages returned by strerror().
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	106 */
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	107
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	108 ngx_first_error = 0;
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	109
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	110 for (err = 0; err < 1000; err++) {
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	111 ngx_set_errno(0);
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	112 msg = strerror(err);
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	113
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	114 if (errno == EINVAL
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	115 \|\| msg == NULL
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	116 \|\| strncmp(msg, "Unknown error", 13) == 0)
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	117 {
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	118 continue;
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	119 }
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	120
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	121 ngx_last_error = err + 1;
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	122 }
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	123
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	124 #endif
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	125
3787 e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	126 /*
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	127 * ngx_strerror() is not ready to work at this stage, therefore,
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	128 * malloc() is used and possible errors are logged using strerror().
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	129 */
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	130
7784 8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	131 len = (ngx_last_error - ngx_first_error) * sizeof(ngx_str_t);
3787 e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	132
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	133 ngx_sys_errlist = malloc(len);
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	134 if (ngx_sys_errlist == NULL) {
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	135 goto failed;
256 8e39cab6abd5 nginx-0.0.2-2004-02-10-19:23:38 import Igor Sysoev <igor@sysoev.ru> parents: 211 diff changeset	136 }
8e39cab6abd5 nginx-0.0.2-2004-02-10-19:23:38 import Igor Sysoev <igor@sysoev.ru> parents: 211 diff changeset	137
7784 8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	138 for (err = ngx_first_error; err < ngx_last_error; err++) {
3787 e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	139 msg = strerror(err);
7784 8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	140
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	141 if (msg == NULL) {
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	142 ngx_sys_errlist[err - ngx_first_error] = ngx_unknown_error;
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	143 continue;
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	144 }
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	145
3787 e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	146 len = ngx_strlen(msg);
256 8e39cab6abd5 nginx-0.0.2-2004-02-10-19:23:38 import Igor Sysoev <igor@sysoev.ru> parents: 211 diff changeset	147
3787 e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	148 p = malloc(len);
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	149 if (p == NULL) {
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	150 goto failed;
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	151 }
256 8e39cab6abd5 nginx-0.0.2-2004-02-10-19:23:38 import Igor Sysoev <igor@sysoev.ru> parents: 211 diff changeset	152
3787 e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	153 ngx_memcpy(p, msg, len);
7784 8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	154 ngx_sys_errlist[err - ngx_first_error].len = len;
8cc5b0365ee5 Improved maximum errno detection. Maxim Dounin <mdounin@mdounin.ru> parents: 4693 diff changeset	155 ngx_sys_errlist[err - ngx_first_error].data = p;
256 8e39cab6abd5 nginx-0.0.2-2004-02-10-19:23:38 import Igor Sysoev <igor@sysoev.ru> parents: 211 diff changeset	156 }
8e39cab6abd5 nginx-0.0.2-2004-02-10-19:23:38 import Igor Sysoev <igor@sysoev.ru> parents: 211 diff changeset	157
3787 e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	158 return NGX_OK;
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	159
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	160 failed:
256 8e39cab6abd5 nginx-0.0.2-2004-02-10-19:23:38 import Igor Sysoev <igor@sysoev.ru> parents: 211 diff changeset	161
3787 e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	162 err = errno;
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	163 ngx_log_stderr(0, "malloc(%uz) failed (%d: %s)", len, err, strerror(err));
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	164
e294f37401c0 use copied strerror() messages and autoconfigured sys_nerr value Igor Sysoev <igor@sysoev.ru> parents: 2335 diff changeset	165 return NGX_ERROR;
256 8e39cab6abd5 nginx-0.0.2-2004-02-10-19:23:38 import Igor Sysoev <igor@sysoev.ru> parents: 211 diff changeset	166 }

Mercurial > hg > nginx

annotate src/os/unix/ngx_errno.c @ 7784:8cc5b0365ee5