[rsync/rsync.git] / exclude.c

/* 
   Copyright (C) Andrew Tridgell 1996
   Copyright (C) Paul Mackerras 1996
   
   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 of the License, 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, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

/* a lot of this stuff was originally derived from GNU tar, although
   it has now changed so much that it is hard to tell :) */

#include "rsync.h"

extern int verbose;
extern int delete_mode;

static struct exclude_struct **exclude_list;

/* build an exclude structure given a exclude pattern */
static struct exclude_struct *make_exclude(char *pattern, int include)
{
	struct exclude_struct *ret;

	ret = (struct exclude_struct *)malloc(sizeof(*ret));
	if (!ret) out_of_memory("make_exclude");

	memset(ret, 0, sizeof(*ret));

	if (strncmp(pattern,"- ",2) == 0) {
		pattern += 2;
	} else if (strncmp(pattern,"+ ",2) == 0) {
		ret->include = 1;
		pattern += 2;
	} else {
		ret->include = include;
	}

	ret->pattern = strdup(pattern);

	if (!ret->pattern) out_of_memory("make_exclude");

	if (strpbrk(pattern, "*[?")) {
	    ret->regular_exp = 1;
	    ret->fnmatch_flags = FNM_PATHNAME;
	    if (strstr(pattern, "**")) {
		    static int tested;
		    if (!tested) {
			    tested = 1;
			    if (fnmatch("a/b/*", "a/b/c/d", FNM_PATHNAME)==0) {
				    rprintf(FERROR,"WARNING: fnmatch FNM_PATHNAME is broken on your system\n");
			    }
		    }
		    ret->fnmatch_flags = 0;
	    }
	}

	if (strlen(pattern) > 1 && pattern[strlen(pattern)-1] == '/') {
		ret->pattern[strlen(pattern)-1] = 0;
		ret->directory = 1;
	}

	if (!strchr(ret->pattern,'/')) {
		ret->local = 1;
	}

	return ret;
}

static void free_exclude(struct exclude_struct *ex)
{
	free(ex->pattern);
	memset(ex,0,sizeof(*ex));
	free(ex);
}

static int check_one_exclude(char *name,struct exclude_struct *ex,
			     STRUCT_STAT *st)
{
	char *p;
	int match_start=0;
	char *pattern = ex->pattern;

	if (ex->local && (p=strrchr(name,'/')))
		name = p+1;

	if (!name[0]) return 0;

	if (ex->directory && !S_ISDIR(st->st_mode)) return 0;

	if (*pattern == '/' && *name != '/') {
		match_start = 1;
		pattern++;
	}

	if (ex->regular_exp) {
		if (fnmatch(pattern, name, ex->fnmatch_flags) == 0) {
			return 1;
		}
	} else {
		int l1 = strlen(name);
		int l2 = strlen(pattern);
		if (l2 <= l1 && 
		    strcmp(name+(l1-l2),pattern) == 0 &&
		    (l1==l2 || (!match_start && name[l1-(l2+1)] == '/'))) {
			return 1;
		}
	}

	return 0;
}


int check_exclude(char *name,struct exclude_struct **local_exclude_list,
		  STRUCT_STAT *st)
{
	int n;

	if (name && (name[0] == '.') && !name[1])
		/* never exclude '.', even if somebody does --exclude '*' */
		return 0;

	if (exclude_list) {
		for (n=0; exclude_list[n]; n++)
			if (check_one_exclude(name,exclude_list[n],st))
				return !exclude_list[n]->include;
	}

	if (local_exclude_list) {
		for (n=0; local_exclude_list[n]; n++)
			if (check_one_exclude(name,local_exclude_list[n],st))
				return !local_exclude_list[n]->include;
	}

	return 0;
}


void add_exclude_list(char *pattern,struct exclude_struct ***list, int include)
{
	int len=0;
	if (list && *list)
		for (; (*list)[len]; len++) ;

	if (strcmp(pattern,"!") == 0) {
		if (verbose > 2)
			rprintf(FINFO,"clearing exclude list\n");
		while ((len)--) {
			free_exclude((*list)[len]);
		}
		free((*list));
		*list = NULL;
		return;
	}

	*list = (struct exclude_struct **)Realloc(*list,sizeof(struct exclude_struct *)*(len+2));
	
	if (!*list || !((*list)[len] = make_exclude(pattern, include)))
		out_of_memory("add_exclude");
	
	if (verbose > 2)
		rprintf(FINFO,"add_exclude(%s)\n",pattern);
	
	(*list)[len+1] = NULL;
}

void add_exclude(char *pattern, int include)
{
	add_exclude_list(pattern,&exclude_list, include);
}

struct exclude_struct **make_exclude_list(char *fname,
					  struct exclude_struct **list1,
					  int fatal, int include)
{
	struct exclude_struct **list=list1;
	FILE *f = fopen(fname,"r");
	char line[MAXPATHLEN];
	if (!f) {
		if (fatal) {
			rprintf(FERROR,"%s : %s\n",fname,strerror(errno));
			exit_cleanup(RERR_FILEIO);
		}
		return list;
	}

	while (fgets(line,MAXPATHLEN,f)) {
		int l = strlen(line);
		if (l && line[l-1] == '\n') l--;
		line[l] = 0;
		if (line[0] && (line[0] != ';') && (line[0] != '#')) {
			/* Skip lines starting with semicolon or pound.
			   It probably wouldn't cause any harm to not skip
			     them but there's no need to save them. */
			add_exclude_list(line,&list,include);
		}
	}
	fclose(f);
	return list;
}


void add_exclude_file(char *fname,int fatal,int include)
{
	if (!fname || !*fname) return;

	exclude_list = make_exclude_list(fname,exclude_list,fatal,include);
}


void send_exclude_list(int f)
{
	int i;
	extern int remote_version;
	extern int list_only, recurse;

	/* this is a complete hack - blame Rusty */
	if (list_only && !recurse) {
		add_exclude("/*/*", 0);
	}

	if (!exclude_list) {
		write_int(f,0);
		return;
	}

	for (i=0;exclude_list[i];i++) {
		int l;
		char pattern[MAXPATHLEN];

		strlcpy(pattern,exclude_list[i]->pattern,sizeof(pattern)); 
		if (exclude_list[i]->directory) strlcat(pattern,"/", sizeof(pattern));

		l = strlen(pattern);
		if (l == 0) continue;
		if (exclude_list[i]->include) {
			if (remote_version < 19) {
				rprintf(FERROR,"remote rsync does not support include syntax - aborting\n");
				exit_cleanup(RERR_UNSUPPORTED);
			}
			write_int(f,l+2);
			write_buf(f,"+ ",2);
		} else {
			write_int(f,l);
		}
		write_buf(f,pattern,l);
	}    

	write_int(f,0);
}


void recv_exclude_list(int f)
{
	char line[MAXPATHLEN];
	int l;
	while ((l=read_int(f))) {
		if (l >= MAXPATHLEN) overflow("recv_exclude_list");
		read_sbuf(f,line,l);
		add_exclude(line,0);
	}
}

/* Get the next include/exclude arg from the string. It works in a similar way
** to strtok - initially an arg is sent over, from then on NULL. This
** routine takes into account any +/- in the strings and does not
** consider the space following it as a delimeter.
*/
char *get_exclude_tok(char *p)
{
	static char *s;
	static int more;
	char *t;

	if (p) {
		s=p;
		if (*p)
			more=1;
	}

	if (!more)
		return(NULL);

	/* Skip over any initial spaces */
	while(isspace(*s))
		s++;

	/* Are we at the end of the string? */
	if (*s) {
		/* remember the beginning of the token */
		t=s;

		/* Is this a '+' or '-' followed by a space (not whitespace)? */
		if ((*s=='+' || *s=='-') && *(s+1)==' ')
			s+=2;
	
		/* Skip to the next space or the end of the string */
		while(!isspace(*s) && *s!='\0')
			s++;
	} else {
		t=NULL;
	}

	/* Have we reached the end of the string? */
	if (*s)
		*s++='\0';
	else
		more=0;
	return(t);
}

	
void add_exclude_line(char *p)
{
	char *tok;
	if (!p || !*p) return;
	p = strdup(p);
	if (!p) out_of_memory("add_exclude_line");
 	for (tok=get_exclude_tok(p); tok; tok=get_exclude_tok(NULL))
		add_exclude(tok, 0);
	free(p);
}

void add_include_line(char *p)
{
	char *tok;
	if (!p || !*p) return;
	p = strdup(p);
	if (!p) out_of_memory("add_include_line");
	for (tok=get_exclude_tok(p); tok; tok=get_exclude_tok(NULL))
		add_exclude(tok, 1);
	free(p);
}


static char *cvs_ignore_list[] = {
  "RCS","SCCS","CVS","CVS.adm","RCSLOG","cvslog.*",
  "tags","TAGS",".make.state",".nse_depinfo",
  "*~", "#*", ".#*", ",*", "*.old", "*.bak", "*.BAK", "*.orig",
  "*.rej", ".del-*", "*.a", "*.o", "*.obj", "*.so", "*.Z", "*.elc", "*.ln",
  "core",NULL};


void add_cvs_excludes(void)
{
	char fname[MAXPATHLEN];
	char *p;
	int i;
  
	for (i=0; cvs_ignore_list[i]; i++)
		add_exclude(cvs_ignore_list[i], 0);

	if ((p=getenv("HOME")) && strlen(p) < (MAXPATHLEN-12)) {
		slprintf(fname,sizeof(fname), "%s/.cvsignore",p);
		add_exclude_file(fname,0,0);
	}

	add_exclude_line(getenv("CVSIGNORE"));
}
Commit	Line	Data
c627d613 AT	1	/*
	2	Copyright (C) Andrew Tridgell 1996
	3	Copyright (C) Paul Mackerras 1996
	4
	5	This program is free software; you can redistribute it and/or modify
	6	it under the terms of the GNU General Public License as published by
	7	the Free Software Foundation; either version 2 of the License, or
	8	(at your option) any later version.
	9
	10	This program is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	GNU General Public License for more details.
	14
	15	You should have received a copy of the GNU General Public License
	16	along with this program; if not, write to the Free Software
	17	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	18	*/
	19
2b6b4d53 AT	20	/* a lot of this stuff was originally derived from GNU tar, although
2b6b4d53 AT	21	it has now changed so much that it is hard to tell :) */
c627d613 AT	22
	23	#include "rsync.h"
	24
	25	extern int verbose;
8458724d	26	extern int delete_mode;
c627d613	27
2b6b4d53	28	static struct exclude_struct **exclude_list;
c627d613	29
2b6b4d53 AT	30	/* build an exclude structure given a exclude pattern */
2b6b4d53 AT	31	static struct exclude_struct make_exclude(char pattern, int include)
c627d613	32	{
2b6b4d53	33	struct exclude_struct *ret;
c627d613	34
2b6b4d53 AT	35	ret = (struct exclude_struct )malloc(sizeof(ret));
2b6b4d53 AT	36	if (!ret) out_of_memory("make_exclude");
c627d613	37
2b6b4d53 AT	38	memset(ret, 0, sizeof(*ret));
2b6b4d53 AT	39
2b6b4d53 AT	40	if (strncmp(pattern,"- ",2) == 0) {
	41	pattern += 2;
	42	} else if (strncmp(pattern,"+ ",2) == 0) {
	43	ret->include = 1;
	44	pattern += 2;
	45	} else {
	46	ret->include = include;
	47	}
	48
	49	ret->pattern = strdup(pattern);
	50
587cb08d	51	if (!ret->pattern) out_of_memory("make_exclude");
c627d613	52
2bca43f6	53	if (strpbrk(pattern, "*[?")) {
2bca43f6	54	ret->regular_exp = 1;
9bec5286 AT	55	ret->fnmatch_flags = FNM_PATHNAME;
	56	if (strstr(pattern, "**")) {
	57	static int tested;
	58	if (!tested) {
	59	tested = 1;
	60	if (fnmatch("a/b/*", "a/b/c/d", FNM_PATHNAME)==0) {
	61	rprintf(FERROR,"WARNING: fnmatch FNM_PATHNAME is broken on your system\n");
	62	}
	63	}
	64	ret->fnmatch_flags = 0;
	65	}
2bca43f6	66	}
c627d613	67
2b6b4d53 AT	68	if (strlen(pattern) > 1 && pattern[strlen(pattern)-1] == '/') {
	69	ret->pattern[strlen(pattern)-1] = 0;
	70	ret->directory = 1;
	71	}
c627d613	72
2b6b4d53 AT	73	if (!strchr(ret->pattern,'/')) {
	74	ret->local = 1;
	75	}
0944563e	76
2b6b4d53 AT	77	return ret;
	78	}
	79
	80	static void free_exclude(struct exclude_struct *ex)
	81	{
2b6b4d53 AT	82	free(ex->pattern);
	83	memset(ex,0,sizeof(*ex));
	84	free(ex);
	85	}
c627d613	86
2b6b4d53 AT	87	static int check_one_exclude(char name,struct exclude_struct ex,
	88	STRUCT_STAT *st)
	89	{
	90	char *p;
	91	int match_start=0;
	92	char *pattern = ex->pattern;
	93
	94	if (ex->local && (p=strrchr(name,'/')))
	95	name = p+1;
	96
	97	if (!name[0]) return 0;
	98
	99	if (ex->directory && !S_ISDIR(st->st_mode)) return 0;
	100
	101	if (pattern == '/' && name != '/') {
	102	match_start = 1;
	103	pattern++;
	104	}
	105
	106	if (ex->regular_exp) {
c36cd317	107	if (fnmatch(pattern, name, ex->fnmatch_flags) == 0) {
2b6b4d53	108	return 1;
c36cd317	109	}
2b6b4d53 AT	110	} else {
2b6b4d53 AT	111	int l1 = strlen(name);
ea2111d1	112	int l2 = strlen(pattern);
2b6b4d53	113	if (l2 <= l1 &&
ea2111d1	114	strcmp(name+(l1-l2),pattern) == 0 &&
c36cd317	115	(l1==l2 \|\| (!match_start && name[l1-(l2+1)] == '/'))) {
2b6b4d53	116	return 1;
c36cd317	117	}
2b6b4d53 AT	118	}
	119
	120	return 0;
c627d613 AT	121	}
	122
	123
2b6b4d53 AT	124	int check_exclude(char name,struct exclude_struct *local_exclude_list,
2b6b4d53 AT	125	STRUCT_STAT *st)
c627d613	126	{
2b6b4d53	127	int n;
c627d613	128
5d5811f7 DD	129	if (name && (name[0] == '.') && !name[1])
	130	/* never exclude '.', even if somebody does --exclude '' /
	131	return 0;
	132
2b6b4d53 AT	133	if (exclude_list) {
	134	for (n=0; exclude_list[n]; n++)
	135	if (check_one_exclude(name,exclude_list[n],st))
	136	return !exclude_list[n]->include;
	137	}
c627d613	138
2b6b4d53 AT	139	if (local_exclude_list) {
	140	for (n=0; local_exclude_list[n]; n++)
	141	if (check_one_exclude(name,local_exclude_list[n],st))
	142	return !local_exclude_list[n]->include;
	143	}
c627d613	144
2b6b4d53	145	return 0;
c627d613 AT	146	}
	147
	148
2b6b4d53	149	void add_exclude_list(char pattern,struct exclude_struct **list, int include)
c627d613	150	{
2b6b4d53 AT	151	int len=0;
	152	if (list && *list)
	153	for (; (*list)[len]; len++) ;
	154
	155	if (strcmp(pattern,"!") == 0) {
	156	if (verbose > 2)
	157	rprintf(FINFO,"clearing exclude list\n");
	158	while ((len)--) {
	159	free_exclude((*list)[len]);
	160	}
	161	free((*list));
	162	*list = NULL;
	163	return;
	164	}
	165
fe8c0a98	166	list = (struct exclude_struct )Realloc(list,sizeof(struct exclude_struct )(len+2));
2b6b4d53 AT	167
	168	if (!list \|\| !((list)[len] = make_exclude(pattern, include)))
	169	out_of_memory("add_exclude");
	170
	171	if (verbose > 2)
	172	rprintf(FINFO,"add_exclude(%s)\n",pattern);
	173
	174	(*list)[len+1] = NULL;
c627d613 AT	175	}
c627d613 AT	176
2b6b4d53	177	void add_exclude(char *pattern, int include)
c627d613	178	{
2b6b4d53	179	add_exclude_list(pattern,&exclude_list, include);
c627d613 AT	180	}
c627d613 AT	181
2b6b4d53 AT	182	struct exclude_struct *make_exclude_list(char fname,
	183	struct exclude_struct **list1,
	184	int fatal, int include)
c627d613	185	{
2b6b4d53 AT	186	struct exclude_struct **list=list1;
	187	FILE *f = fopen(fname,"r");
	188	char line[MAXPATHLEN];
	189	if (!f) {
	190	if (fatal) {
	191	rprintf(FERROR,"%s : %s\n",fname,strerror(errno));
65417579	192	exit_cleanup(RERR_FILEIO);
2b6b4d53 AT	193	}
	194	return list;
	195	}
	196
	197	while (fgets(line,MAXPATHLEN,f)) {
	198	int l = strlen(line);
	199	if (l && line[l-1] == '\n') l--;
	200	line[l] = 0;
122f19a6 DD	201	if (line[0] && (line[0] != ';') && (line[0] != '#')) {
	202	/* Skip lines starting with semicolon or pound.
	203	It probably wouldn't cause any harm to not skip
	204	them but there's no need to save them. */
	205	add_exclude_list(line,&list,include);
	206	}
2b6b4d53 AT	207	}
	208	fclose(f);
	209	return list;
c627d613 AT	210	}
	211
	212
2b6b4d53	213	void add_exclude_file(char *fname,int fatal,int include)
c627d613	214	{
8f3a2d54 AT	215	if (!fname \|\| !*fname) return;
8f3a2d54 AT	216
2b6b4d53	217	exclude_list = make_exclude_list(fname,exclude_list,fatal,include);
c627d613 AT	218	}
	219
	220
	221	void send_exclude_list(int f)
	222	{
2b6b4d53 AT	223	int i;
2b6b4d53 AT	224	extern int remote_version;
25cf8893 AT	225	extern int list_only, recurse;
	226
	227	/* this is a complete hack - blame Rusty */
	228	if (list_only && !recurse) {
	229	add_exclude("//", 0);
	230	}
2b6b4d53 AT	231
	232	if (!exclude_list) {
	233	write_int(f,0);
	234	return;
	235	}
	236
	237	for (i=0;exclude_list[i];i++) {
2b6b4d53	238	int l;
2fb139c1 AT	239	char pattern[MAXPATHLEN];
	240
	241	strlcpy(pattern,exclude_list[i]->pattern,sizeof(pattern));
	242	if (exclude_list[i]->directory) strlcat(pattern,"/", sizeof(pattern));
2b6b4d53	243
587cb08d DD	244	l = strlen(pattern);
	245	if (l == 0) continue;
	246	if (exclude_list[i]->include) {
	247	if (remote_version < 19) {
2b6b4d53	248	rprintf(FERROR,"remote rsync does not support include syntax - aborting\n");
ec9df380	249	exit_cleanup(RERR_UNSUPPORTED);
2b6b4d53	250	}
587cb08d DD	251	write_int(f,l+2);
	252	write_buf(f,"+ ",2);
	253	} else {
	254	write_int(f,l);
2b6b4d53	255	}
2b6b4d53 AT	256	write_buf(f,pattern,l);
	257	}
	258
	259	write_int(f,0);
c627d613 AT	260	}
	261
	262
	263	void recv_exclude_list(int f)
	264	{
2b6b4d53 AT	265	char line[MAXPATHLEN];
	266	int l;
	267	while ((l=read_int(f))) {
	268	if (l >= MAXPATHLEN) overflow("recv_exclude_list");
	269	read_sbuf(f,line,l);
	270	add_exclude(line,0);
	271	}
c627d613 AT	272	}
c627d613 AT	273
651443a7 DD	274	/* Get the next include/exclude arg from the string. It works in a similar way
	275	** to strtok - initially an arg is sent over, from then on NULL. This
	276	** routine takes into account any +/- in the strings and does not
	277	** consider the space following it as a delimeter.
	278	*/
	279	char get_exclude_tok(char p)
	280	{
	281	static char *s;
	282	static int more;
	283	char *t;
	284
	285	if (p) {
	286	s=p;
	287	if (*p)
	288	more=1;
	289	}
	290
	291	if (!more)
	292	return(NULL);
c627d613	293
651443a7 DD	294	/* Skip over any initial spaces */
	295	while(isspace(*s))
	296	s++;
	297
	298	/* Are we at the end of the string? */
	299	if (*s) {
	300	/* remember the beginning of the token */
	301	t=s;
	302
	303	/* Is this a '+' or '-' followed by a space (not whitespace)? */
	304	if ((s=='+' \|\| s=='-') && *(s+1)==' ')
	305	s+=2;
	306
	307	/* Skip to the next space or the end of the string */
	308	while(!isspace(s) && s!='\0')
	309	s++;
	310	} else {
	311	t=NULL;
	312	}
	313
	314	/* Have we reached the end of the string? */
	315	if (*s)
	316	*s++='\0';
	317	else
	318	more=0;
	319	return(t);
	320	}
	321
	322
8f3a2d54 AT	323	void add_exclude_line(char *p)
	324	{
	325	char *tok;
	326	if (!p \|\| !*p) return;
	327	p = strdup(p);
	328	if (!p) out_of_memory("add_exclude_line");
651443a7	329	for (tok=get_exclude_tok(p); tok; tok=get_exclude_tok(NULL))
2b6b4d53	330	add_exclude(tok, 0);
8f3a2d54 AT	331	free(p);
	332	}
	333
cd64343a DD	334	void add_include_line(char *p)
	335	{
	336	char *tok;
	337	if (!p \|\| !*p) return;
	338	p = strdup(p);
	339	if (!p) out_of_memory("add_include_line");
651443a7	340	for (tok=get_exclude_tok(p); tok; tok=get_exclude_tok(NULL))
cd64343a DD	341	add_exclude(tok, 1);
	342	free(p);
	343	}
	344
8f3a2d54	345
c627d613 AT	346	static char *cvs_ignore_list[] = {
	347	"RCS","SCCS","CVS","CVS.adm","RCSLOG","cvslog.*",
	348	"tags","TAGS",".make.state",".nse_depinfo",
	349	"~", "#", ".#", ",", ".old", ".bak", ".BAK", ".orig",
	350	".rej", ".del-", ".a", ".o", ".obj", ".so", ".Z", ".elc", "*.ln",
	351	"core",NULL};
	352
	353
	354
	355	void add_cvs_excludes(void)
	356	{
2b6b4d53 AT	357	char fname[MAXPATHLEN];
	358	char *p;
	359	int i;
c627d613	360
2b6b4d53 AT	361	for (i=0; cvs_ignore_list[i]; i++)
2b6b4d53 AT	362	add_exclude(cvs_ignore_list[i], 0);
c627d613	363
2b6b4d53	364	if ((p=getenv("HOME")) && strlen(p) < (MAXPATHLEN-12)) {
37f9805d	365	slprintf(fname,sizeof(fname), "%s/.cvsignore",p);
2b6b4d53 AT	366	add_exclude_file(fname,0,0);
2b6b4d53 AT	367	}
c627d613	368
2b6b4d53	369	add_exclude_line(getenv("CVSIGNORE"));
c627d613	370	}