X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=secnet.git;a=blobdiff_plain;f=util.c;h=94f9e35679acf34c7d500fade5e25919087cd9cc;hp=de182a431445abdf34abc8b3f7dbf57f17ee919e;hb=c7396710e7bf07f947ec6e8623144acff130d920;hpb=927950400bd569326c3babf4e29038523fa464a6

diff --git a/util.c b/util.c
index de182a4..94f9e35 100644
--- a/util.c
+++ b/util.c
@@ -162,6 +162,20 @@ int32_t write_mpbin(MP_INT *a, uint8_t *buffer, int32_t buflen)
     return i;
 }
 
+void setcloexec(int fd) {
+    int r=fcntl(fd, F_GETFD);
+    if (r<0) fatal_perror("fcntl(,F_GETFD) failed");
+    r=fcntl(fd, F_SETFD, r|FD_CLOEXEC);
+    if (r<0) fatal_perror("fcntl(,F_SETFD,|FD_CLOEXEC) failed");
+}
+
+void pipe_cloexec(int fd[2]) {
+    int r=pipe(fd);
+    if (r) fatal_perror("pipe");
+    setcloexec(fd[0]);
+    setcloexec(fd[1]);
+}
+
 static const char *phases[NR_PHASES]={
     "PHASE_INIT",
     "PHASE_GETOPTS",
@@ -247,7 +261,7 @@ void buffer_assert_used(struct buffer_if *buffer, cstring_t file,
 
 void buffer_init(struct buffer_if *buffer, int32_t max_start_pad)
 {
-    assert(max_start_pad<=buffer->len);
+    assert(max_start_pad<=buffer->alloclen);
     buffer->start=buffer->base+max_start_pad;
     buffer->size=0;
 }
@@ -289,7 +303,7 @@ void buf_append_string(struct buffer_if *buf, cstring_t s)
     len=strlen(s);
     /* fixme: if string is longer than 65535, result is a corrupted packet */
     buf_append_uint16(buf,len);
-    memcpy(buf_append(buf,len),s,len);
+    BUF_ADD_BYTES(append,buf,s,len);
 }
 
 void buffer_new(struct buffer_if *buf, int32_t len)
@@ -300,7 +314,7 @@ void buffer_new(struct buffer_if *buf, int32_t len)
     buf->loc.file=NULL;
     buf->loc.line=0;
     buf->size=0;
-    buf->len=len;
+    buf->alloclen=len;
     buf->start=NULL;
     buf->base=safe_malloc(len,"buffer_new");
 }
@@ -312,7 +326,7 @@ void buffer_readonly_view(struct buffer_if *buf, const void *data, int32_t len)
     buf->flags=0;
     buf->loc.file=NULL;
     buf->loc.line=0;
-    buf->size=buf->len=len;
+    buf->size=buf->alloclen=len;
     buf->base=buf->start=(uint8_t*)data;
 }
 
@@ -323,10 +337,10 @@ void buffer_readonly_clone(struct buffer_if *out, const struct buffer_if *in)
 
 void buffer_copy(struct buffer_if *dst, const struct buffer_if *src)
 {
-    if (dst->len < src->len) {
-	dst->base=realloc(dst->base,src->len);
+    if (dst->alloclen < src->alloclen) {
+	dst->base=realloc(dst->base,src->alloclen);
 	if (!dst->base) fatal_perror("buffer_copy");
-	dst->len = src->len;
+	dst->alloclen = src->alloclen;
     }
     dst->start = dst->base + (src->start - src->base);
     dst->size = src->size;