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31 May 2024, 23:06:24 UTC
Revision 11d515334432e840d9699703e0634e9df58a4441 authored by J. Bruce Fields on 18 June 2007, 20:38:22 UTC, committed by J. Bruce Fields on 08 July 2007, 22:17:47 UTC 
user-manual: more explanation of push and pull usage
 
Recently a user on the mailing list complained that they'd read the
manual but couldn't figure out how to keep a couple private repositories
in sync.  They'd tried using push, and were surprised by the effect.

Add a little text in an attempt to make it clear that:
	- Pushing to a branch that is checked out will have odd results.
	- It's OK to synchronize just using pull if that's simpler.

Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
1 parent f0dc409
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Tip revision: 11d515334432e840d9699703e0634e9df58a4441 authored by J. Bruce Fields on 18 June 2007, 20:38:22 UTC
user-manual: more explanation of push and pull usage
Tip revision: 11d5153
write_or_die.c 
#include "cache.h"

int read_in_full(int fd, void *buf, size_t count)
{
	char *p = buf;
	ssize_t total = 0;

	while (count > 0) {
		ssize_t loaded = xread(fd, p, count);
		if (loaded <= 0)
			return total ? total : loaded;
		count -= loaded;
		p += loaded;
		total += loaded;
	}

	return total;
}

int write_in_full(int fd, const void *buf, size_t count)
{
	const char *p = buf;
	ssize_t total = 0;

	while (count > 0) {
		ssize_t written = xwrite(fd, p, count);
		if (written < 0)
			return -1;
		if (!written) {
			errno = ENOSPC;
			return -1;
		}
		count -= written;
		p += written;
		total += written;
	}

	return total;
}

void write_or_die(int fd, const void *buf, size_t count)
{
	if (write_in_full(fd, buf, count) < 0) {
		if (errno == EPIPE)
			exit(0);
		die("write error (%s)", strerror(errno));
	}
}

int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg)
{
	if (write_in_full(fd, buf, count) < 0) {
		if (errno == EPIPE)
			exit(0);
		fprintf(stderr, "%s: write error (%s)\n",
			msg, strerror(errno));
		return 0;
	}

	return 1;
}

int write_or_whine(int fd, const void *buf, size_t count, const char *msg)
{
	if (write_in_full(fd, buf, count) < 0) {
		fprintf(stderr, "%s: write error (%s)\n",
			msg, strerror(errno));
		return 0;
	}

	return 1;
}
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