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![Andy Whitcroft](/assets/img/avatar_default.png)
We recently introduced a write_in_full() which would either write the specified object or emit an error message and fail. In order to fix the read side we now want to introduce a read_in_full() but without an error emit. This patch cleans up the naming of this family of calls: 1) convert the existing write_or_whine() to write_or_whine_pipe() to better indicate its pipe specific nature, 2) convert the existing write_in_full() calls to write_or_whine() to better indicate its nature, 3) introduce a write_in_full() providing a write or fail semantic, and 4) convert write_or_whine() and write_or_whine_pipe() to use write_in_full(). Signed-off-by: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
151 lines
3.9 KiB
C
151 lines
3.9 KiB
C
/*
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* GIT - The information manager from hell
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*
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* Copyright (C) 2000-2002 Michael R. Elkins <me@mutt.org>
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* Copyright (C) 2002-2004 Oswald Buddenhagen <ossi@users.sf.net>
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* Copyright (C) 2004 Theodore Y. Ts'o <tytso@mit.edu>
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* Copyright (C) 2006 Mike McCormack
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* Copyright (C) 2006 Christian Couder
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "cache.h"
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#include "quote.h"
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/* Stolen from "imap-send.c". */
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static int git_vasprintf(char **strp, const char *fmt, va_list ap)
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{
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int len;
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char tmp[1024];
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if ((len = vsnprintf(tmp, sizeof(tmp), fmt, ap)) < 0 ||
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!(*strp = xmalloc(len + 1)))
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return -1;
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if (len >= (int)sizeof(tmp))
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vsprintf(*strp, fmt, ap);
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else
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memcpy(*strp, tmp, len + 1);
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return len;
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}
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/* Stolen from "imap-send.c". */
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int nfvasprintf(char **str, const char *fmt, va_list va)
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{
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int ret = git_vasprintf(str, fmt, va);
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if (ret < 0)
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die("Fatal: Out of memory\n");
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return ret;
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}
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/* Get a trace file descriptor from GIT_TRACE env variable. */
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static int get_trace_fd(int *need_close)
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{
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char *trace = getenv("GIT_TRACE");
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if (!trace || !strcmp(trace, "") ||
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!strcmp(trace, "0") || !strcasecmp(trace, "false"))
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return 0;
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if (!strcmp(trace, "1") || !strcasecmp(trace, "true"))
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return STDERR_FILENO;
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if (strlen(trace) == 1 && isdigit(*trace))
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return atoi(trace);
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if (*trace == '/') {
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int fd = open(trace, O_WRONLY | O_APPEND | O_CREAT, 0666);
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if (fd == -1) {
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fprintf(stderr,
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"Could not open '%s' for tracing: %s\n"
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"Defaulting to tracing on stderr...\n",
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trace, strerror(errno));
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return STDERR_FILENO;
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}
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*need_close = 1;
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return fd;
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}
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fprintf(stderr, "What does '%s' for GIT_TRACE means ?\n", trace);
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fprintf(stderr, "If you want to trace into a file, "
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"then please set GIT_TRACE to an absolute pathname "
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"(starting with /).\n");
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fprintf(stderr, "Defaulting to tracing on stderr...\n");
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return STDERR_FILENO;
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}
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static const char err_msg[] = "Could not trace into fd given by "
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"GIT_TRACE environment variable";
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void trace_printf(const char *format, ...)
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{
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char *trace_str;
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va_list rest;
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int need_close = 0;
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int fd = get_trace_fd(&need_close);
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if (!fd)
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return;
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va_start(rest, format);
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nfvasprintf(&trace_str, format, rest);
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va_end(rest);
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write_or_whine_pipe(fd, trace_str, strlen(trace_str), err_msg);
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free(trace_str);
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if (need_close)
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close(fd);
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}
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void trace_argv_printf(const char **argv, int count, const char *format, ...)
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{
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char *argv_str, *format_str, *trace_str;
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size_t argv_len, format_len, trace_len;
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va_list rest;
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int need_close = 0;
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int fd = get_trace_fd(&need_close);
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if (!fd)
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return;
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/* Get the argv string. */
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argv_str = sq_quote_argv(argv, count);
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argv_len = strlen(argv_str);
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/* Get the formated string. */
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va_start(rest, format);
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nfvasprintf(&format_str, format, rest);
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va_end(rest);
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/* Allocate buffer for trace string. */
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format_len = strlen(format_str);
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trace_len = argv_len + format_len + 1; /* + 1 for \n */
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trace_str = xmalloc(trace_len + 1);
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/* Copy everything into the trace string. */
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strncpy(trace_str, format_str, format_len);
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strncpy(trace_str + format_len, argv_str, argv_len);
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strcpy(trace_str + trace_len - 1, "\n");
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write_or_whine_pipe(fd, trace_str, trace_len, err_msg);
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free(argv_str);
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free(format_str);
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free(trace_str);
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if (need_close)
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close(fd);
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}
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