X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/9486289ce452ab82ca8b3f16fae8c2ef5247a923..e42c9458c2f1e3a78d6d45e99741d6edb38fc0cc:/util.c

diff --git a/util.c b/util.c
index 59f94182..cc39cdb4 100644
--- a/util.c
+++ b/util.c
@@ -446,58 +446,222 @@ void kill_all(int sig)
 	}
 }
 
-/* this is the rsync debugging function. Call it with FINFO or FERROR */
-void rprintf(int fd, const char *format, ...)
+/* like strncpy but does not 0 fill the buffer and always null 
+   terminates (thus it can use maxlen+1 space in d) */
+void strlcpy(char *d, char *s, int maxlen)
 {
-	va_list ap;  
-	char buf[1024];
-	int len;
-	FILE *f=NULL;
+	int len = strlen(s);
+	if (len > maxlen) len = maxlen;
+	memcpy(d, s, len);
+	d[len] = 0;
+}
+
+/* like strncat but does not 0 fill the buffer and always null 
+   terminates (thus it can use maxlen+1 space in d) */
+void strlcat(char *d, char *s, int maxlen)
+{
+	int len1 = strlen(d);
+	int len2 = strlen(s);
+	if (len1+len2 > maxlen) {
+		len2 = maxlen-len1;
+	}
+	if (len2 > 0) {
+		memcpy(d+len1, s, len2);
+		d[len1+len2] = 0;
+	}
+}
+
+/* turn a user name into a uid */
+int name_to_uid(char *name, uid_t *uid)
+{
+	struct passwd *pass;
+	if (!name || !*name) return 0;
+	pass = getpwnam(name);
+	if (pass) {
+		*uid = pass->pw_uid;
+		return 1;
+	}
+	return 0;
+}
+
+/* turn a group name into a gid */
+int name_to_gid(char *name, gid_t *gid)
+{
+	struct group *grp;
+	if (!name || !*name) return 0;
+	grp = getgrnam(name);
+	if (grp) {
+		*gid = grp->gr_gid;
+		return 1;
+	}
+	return 0;
+}
 
-	va_start(ap, format);
 
-#if HAVE_VSNPRINTF
-	len = vsnprintf(buf, sizeof(buf)-1, format, ap);
+/****************************************************************************
+check if a process exists. 
+****************************************************************************/
+int process_exists(int pid)
+{
+	return(kill(pid,0) == 0 || errno != ESRCH);
+}
+
+/* lock a byte range in a open file */
+int lock_range(int fd, int offset, int len)
+{
+	struct flock lock;
+
+	lock.l_type = F_WRLCK;
+	lock.l_whence = SEEK_SET;
+	lock.l_start = offset;
+	lock.l_len = len;
+	lock.l_pid = 0;
+	
+	return fcntl(fd,F_SETLK,&lock) == 0;
+}
+
+
+static void glob_expand_one(char *s, char **argv, int *argc, int maxargs)
+{
+#ifndef HAVE_GLOB
+	if (!*s) s = ".";
+	argv[*argc] = strdup(s);
+	(*argc)++;
+	return;
 #else
-	len = vsprintf(buf, format, ap);
+	glob_t globbuf;
+	int i;
+
+	if (!*s) s = ".";
+
+	argv[*argc] = strdup(s);
+
+	memset(&globbuf, 0, sizeof(globbuf));
+	glob(argv[*argc], 0, NULL, &globbuf);
+	if (globbuf.gl_pathc == 0) {
+		(*argc)++;
+		globfree(&globbuf);
+		return;
+	}
+	for (i=0; i<(maxargs - (*argc)) && i<globbuf.gl_pathc;i++) {
+		if (i == 0) free(argv[*argc]);
+		argv[(*argc) + i] = strdup(globbuf.gl_pathv[i]);
+		if (!argv[(*argc) + i]) out_of_memory("glob_expand");
+	}
+	globfree(&globbuf);
+	(*argc) += i;
 #endif
-	va_end(ap);
+}
 
-	if (len < 0) exit_cleanup(1);
+void glob_expand(char *base, char **argv, int *argc, int maxargs)
+{
+	char *s = argv[*argc];
+	char *p, *q;
 
-	if (fd == FERROR) {
-		f = stderr;
-	} 
+	if (!s || !*s) return;
 
-	if (fd == FINFO) {
-		extern int am_server;
-		if (am_server) 
-			f = stderr;
-		else
-			f = stdout;
-	} 
+	if (strncmp(s, base, strlen(base)) == 0) {
+		s += strlen(base);
+	}
+
+	s = strdup(s);
+	if (!s) out_of_memory("glob_expand");
+
+	q = s;
+	while ((p = strstr(q,base)) && ((*argc) < maxargs)) {
+		if (p != q && *(p-1) == ' ' && p[strlen(base)] == '/') {
+			/* split it at this point */
+			*(p-1) = 0;
+			glob_expand_one(q, argv, argc, maxargs);
+			q = p+strlen(base)+1;
+		} else {
+			q++;
+		}
+	}
 
-	if (!f) exit_cleanup(1);
+	if (*q && (*argc < maxargs)) glob_expand_one(q, argv, argc, maxargs);
 
-	if (fwrite(buf, len, 1, f) != 1) exit_cleanup(1);
+	free(s);
 }
 
-void rflush(int fd)
+/*******************************************************************
+  convert a string to lower case
+********************************************************************/
+void strlower(char *s)
 {
-	FILE *f = NULL;
+	while (*s) {
+		if (isupper(*s)) *s = tolower(*s);
+		s++;
+	}
+}
 
-	if (fd == FERROR) {
-		f = stderr;
-	} 
+/* this is like vsnprintf but the 'n' limit does not include
+   the terminating null. So if you have a 1024 byte buffer then
+   pass 1023 for n */
+int vslprintf(char *str, int n, const char *format, va_list ap)
+{
+#ifdef HAVE_VSNPRINTF
+	int ret = vsnprintf(str, n, format, ap);
+	if (ret > n || ret < 0) {
+		str[n] = 0;
+		return -1;
+	}
+	str[ret] = 0;
+	return ret;
+#else
+	static char *buf;
+	static int len=MAXPATHLEN*8;
+	int ret;
+
+	/* this code is NOT a proper vsnprintf() implementation. It
+	   relies on the fact that all calls to slprintf() in rsync
+	   pass strings which have already been checked to be less
+	   than MAXPATHLEN in length and never more than 2 strings are
+	   concatenated. This means the above buffer is absolutely
+	   ample and can never be overflowed.
+
+	   In the future we would like to replace this with a proper
+	   vsnprintf() implementation but right now we need a solution
+	   that is secure and portable. This is it.  */
+
+	if (!buf) {
+		buf = malloc(len);
+		if (!buf) {
+			/* can't call debug or we would recurse */
+			exit(1);
+		}
+	}
 
-	if (fd == FINFO) {
-		extern int am_server;
-		if (am_server) 
-			f = stderr;
-		else
-			f = stdout;
-	} 
-
-	if (!f) exit_cleanup(1);
-	fflush(f);
+	ret = vsprintf(buf, format, ap);
+
+	if (ret < 0) {
+		str[0] = 0;
+		return -1;
+	}
+
+	if (ret < n) {
+		n = ret;
+	} else if (ret > n) {
+		ret = -1;
+	}
+
+	buf[n] = 0;
+	
+	memcpy(str, buf, n+1);
+
+	return ret;
+#endif
+}
+
+
+/* like snprintf but always null terminates */
+int slprintf(char *str, int n, char *format, ...)
+{
+	va_list ap;  
+	int ret;
+
+	va_start(ap, format);
+	ret = vslprintf(str,n,format,ap);
+	va_end(ap);
+	return ret;
 }