Date: Sun, 17 Apr 2011 22:26:08 +0000 (UTC) From: Jilles Tjoelker <jilles@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-7@freebsd.org Subject: svn commit: r220759 - in stable/7: lib/libc/gen lib/libc/string tools/regression/lib/libc/string Message-ID: <201104172226.p3HMQ81Y051533@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: jilles Date: Sun Apr 17 22:26:07 2011 New Revision: 220759 URL: http://svn.freebsd.org/changeset/base/220759 Log: MFC r220376: Allow strerror(0) and strerror_r(0, ...). Of course, strerror_r() may still fail with ERANGE. Although the POSIX specification said this could fail with EINVAL and doing this likely indicates invalid use of errno, most other implementations permitted it, various POSIX testsuites require it to work (matching the older sys_errlist array) and apparently some applications depend on it. PR: standards/151316 Modified: stable/7/lib/libc/gen/errlst.c stable/7/lib/libc/string/strerror.3 stable/7/lib/libc/string/strerror.c stable/7/tools/regression/lib/libc/string/test-strerror.c Directory Properties: stable/7/lib/libc/ (props changed) stable/7/lib/libc/stdtime/ (props changed) stable/7/tools/regression/lib/libc/ (props changed) Modified: stable/7/lib/libc/gen/errlst.c ============================================================================== --- stable/7/lib/libc/gen/errlst.c Sun Apr 17 21:57:08 2011 (r220758) +++ stable/7/lib/libc/gen/errlst.c Sun Apr 17 22:26:07 2011 (r220759) @@ -36,7 +36,7 @@ __FBSDID("$FreeBSD$"); #include <stdio.h> const char *const sys_errlist[] = { - "Undefined error: 0", /* 0 - ENOERROR */ + "No error: 0", /* 0 - ENOERROR */ "Operation not permitted", /* 1 - EPERM */ "No such file or directory", /* 2 - ENOENT */ "No such process", /* 3 - ESRCH */ Modified: stable/7/lib/libc/string/strerror.3 ============================================================================== --- stable/7/lib/libc/string/strerror.3 Sun Apr 17 21:57:08 2011 (r220758) +++ stable/7/lib/libc/string/strerror.3 Sun Apr 17 22:26:07 2011 (r220759) @@ -32,7 +32,7 @@ .\" @(#)strerror.3 8.1 (Berkeley) 6/9/93 .\" $FreeBSD$ .\" -.Dd October 12, 2004 +.Dd April 5, 2011 .Dt STRERROR 3 .Os .Sh NAME @@ -114,6 +114,9 @@ the range 0 < .Fa errnum < .Fa sys_nerr . +The number 0 is also recognized, although applications that take advantage of +this are likely to use unspecified values of +.Va errno . .Pp If insufficient storage is provided in .Fa strerrbuf Modified: stable/7/lib/libc/string/strerror.c ============================================================================== --- stable/7/lib/libc/string/strerror.c Sun Apr 17 21:57:08 2011 (r220758) +++ stable/7/lib/libc/string/strerror.c Sun Apr 17 22:26:07 2011 (r220759) @@ -87,7 +87,7 @@ strerror_r(int errnum, char *strerrbuf, catd = catopen("libc", NL_CAT_LOCALE); #endif - if (errnum < 1 || errnum >= sys_nerr) { + if (errnum < 0 || errnum >= sys_nerr) { errstr(errnum, #if defined(NLS) catgets(catd, 1, 0xffff, UPREFIX), Modified: stable/7/tools/regression/lib/libc/string/test-strerror.c ============================================================================== --- stable/7/tools/regression/lib/libc/string/test-strerror.c Sun Apr 17 21:57:08 2011 (r220758) +++ stable/7/tools/regression/lib/libc/string/test-strerror.c Sun Apr 17 22:26:07 2011 (r220759) @@ -42,17 +42,12 @@ main(void) char *sret; int iret; - plan_tests(25); + plan_tests(27); /* * strerror() failure tests. */ errno = 0; - sret = strerror(0); - ok1(strcmp(sret, "Unknown error: 0") == 0); - ok1(errno == EINVAL); - - errno = 0; sret = strerror(INT_MAX); snprintf(buf, sizeof(buf), "Unknown error: %d", INT_MAX); ok1(strcmp(sret, buf) == 0); @@ -62,6 +57,11 @@ main(void) * strerror() success tests. */ errno = 0; + sret = strerror(0); + ok1(strcmp(sret, "No error: 0") == 0); + ok1(errno == 0); + + errno = 0; sret = strerror(EPERM); ok1(strcmp(sret, "Operation not permitted") == 0); ok1(errno == 0); @@ -79,8 +79,8 @@ main(void) * strerror_r() failure tests. */ memset(buf, '*', sizeof(buf)); - iret = strerror_r(0, buf, sizeof(buf)); - ok1(strcmp(buf, "Unknown error: 0") == 0); + iret = strerror_r(-1, buf, sizeof(buf)); + ok1(strcmp(buf, "Unknown error: -1") == 0); ok1(iret == EINVAL); memset(buf, '*', sizeof(buf)); @@ -117,6 +117,11 @@ main(void) * strerror_r() success tests. */ memset(buf, '*', sizeof(buf)); + iret = strerror_r(0, buf, sizeof(buf)); + ok1(strcmp(buf, "No error: 0") == 0); + ok1(iret == 0); + + memset(buf, '*', sizeof(buf)); iret = strerror_r(EDEADLK, buf, sizeof(buf)); ok1(strcmp(buf, "Resource deadlock avoided") == 0); ok1(iret == 0);
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201104172226.p3HMQ81Y051533>