Mercurial > gnulib
view lib/snprintf.c @ 40189:3ba41edecde6
progreloc: Speed up executable lookup on various platforms.
* lib/progreloc.c: Include <errno.h>.
(safe_read, full_read): New functions.
(find_executable): On GNU/kFreeBSD, FreeBSD, DragonFly, NetBSD, Solaris,
prefer the information from the /proc file system to a PATH search.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Tue, 19 Feb 2019 21:42:54 +0100 |
parents | b06060465f09 |
children |
line wrap: on
line source
/* Formatted output to strings. Copyright (C) 2004, 2006-2019 Free Software Foundation, Inc. Written by Simon Josefsson and Paul Eggert. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, see <https://www.gnu.org/licenses/>. */ #include <config.h> /* Specification. */ #include <stdio.h> #include <errno.h> #include <limits.h> #include <stdarg.h> #include <stdlib.h> #include <string.h> #include "vasnprintf.h" /* Print formatted output to string STR. Similar to sprintf, but additional length SIZE limit how much is written into STR. Returns string length of formatted string (which may be larger than SIZE). STR may be NULL, in which case nothing will be written. On error, return a negative value. */ int snprintf (char *str, size_t size, const char *format, ...) { char *output; size_t len; size_t lenbuf = size; va_list args; va_start (args, format); output = vasnprintf (str, &lenbuf, format, args); len = lenbuf; va_end (args); if (!output) return -1; if (output != str) { if (size) { size_t pruned_len = (len < size ? len : size - 1); memcpy (str, output, pruned_len); str[pruned_len] = '\0'; } free (output); } if (INT_MAX < len) { errno = EOVERFLOW; return -1; } return len; }