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https://git.proxmox.com/git/libgit2
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97769280ba
This converts virtually all of the places that allocate GIT_PATH_MAX buffers on the stack for manipulating paths to use git_buf objects instead. The patch is pretty careful not to touch the public API for libgit2, so there are a few places that still use GIT_PATH_MAX. This extends and changes some details of the git_buf implementation to add a couple of extra functions and to make error handling easier. This includes serious alterations to all the path.c functions, and several of the fileops.c ones, too. Also, there are a number of new functions that parallel existing ones except that use a git_buf instead of a stack-based buffer (such as git_config_find_global_r that exists alongsize git_config_find_global). This also modifies the win32 version of p_realpath to allocate whatever buffer size is needed to accommodate the realpath instead of hardcoding a GIT_PATH_MAX limit, but that change needs to be tested still.
96 lines
1.7 KiB
C
96 lines
1.7 KiB
C
/*
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* Copyright (C) 2009-2011 the libgit2 contributors
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*
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* This file is part of libgit2, distributed under the GNU GPL v2 with
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* a Linking Exception. For full terms see the included COPYING file.
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*/
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#include "common.h"
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#include "posix.h"
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#include "path.h"
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#include <stdio.h>
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#include <ctype.h>
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#ifndef GIT_WIN32
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int p_open(const char *path, int flags)
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{
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return open(path, flags | O_BINARY);
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}
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int p_creat(const char *path, mode_t mode)
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{
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return open(path, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, mode);
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}
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int p_getcwd(char *buffer_out, size_t size)
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{
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char *cwd_buffer;
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assert(buffer_out && size > 0);
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cwd_buffer = getcwd(buffer_out, size);
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if (cwd_buffer == NULL)
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return git__throw(GIT_EOSERR, "Failed to retrieve current working directory");
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git_path_mkposix(buffer_out);
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git_path_string_to_dir(buffer_out, size); //Ensure the path ends with a trailing slash
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return GIT_SUCCESS;
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}
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int p_rename(const char *from, const char *to)
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{
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if (!link(from, to)) {
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p_unlink(from);
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return GIT_SUCCESS;
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}
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if (!rename(from, to))
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return GIT_SUCCESS;
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return GIT_ERROR;
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}
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#endif
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int p_read(git_file fd, void *buf, size_t cnt)
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{
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char *b = buf;
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while (cnt) {
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ssize_t r = read(fd, b, cnt);
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if (r < 0) {
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if (errno == EINTR || errno == EAGAIN)
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continue;
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return GIT_EOSERR;
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}
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if (!r)
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break;
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cnt -= r;
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b += r;
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}
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return (int)(b - (char *)buf);
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}
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int p_write(git_file fd, const void *buf, size_t cnt)
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{
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const char *b = buf;
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while (cnt) {
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ssize_t r = write(fd, b, cnt);
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if (r < 0) {
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if (errno == EINTR || errno == EAGAIN)
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continue;
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return GIT_EOSERR;
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}
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if (!r) {
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errno = EPIPE;
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return GIT_EOSERR;
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}
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cnt -= r;
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b += r;
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}
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return GIT_SUCCESS;
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}
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