Loop on our reads while errno is EINTR or EAGAIN. Also make sure to

2002-06-27  Jeffrey Stedfast  <fejj@ximian.com>

	* camel-gpg-context.c (gpg_ctx_op_step): Loop on our reads while
	errno is EINTR or EAGAIN. Also make sure to completely read stdout
	and stderr by keeping better state.

svn path=/trunk/; revision=17311

1 files changed, 18 insertions, 22 deletions

diff --git a/camel/camel-gpg-context.c b/camel/camel-gpg-context.c
index 6994337ecc..2483a10c59 100644
--- a/camel/camel-gpg-context.c
+++ b/camel/camel-gpg-context.c
@@ -250,8 +250,8 @@ struct _GpgCtx {
 	GByteArray *diagnostics;
 	
 	unsigned int complete:1;
-	unsigned int await_read:1;
-	unsigned int reading:2;
+	unsigned int seen_eof1:1;
+	unsigned int seen_eof2:1;
 	unsigned int always_trust:1;
 	unsigned int armor:1;
 	unsigned int need_passwd:1;
@@ -262,7 +262,7 @@ struct _GpgCtx {
 	unsigned int validsig:1;
 	unsigned int trust:3;
 	
-	unsigned int padding:18;
+	unsigned int padding:19;
 };
 
 static struct _GpgCtx *
@@ -276,8 +276,8 @@ gpg_ctx_new (CamelSession *session, const char *path)
 	camel_object_ref (CAMEL_OBJECT (session));
 	gpg->userid_hint = g_hash_table_new (g_str_hash, g_str_equal);
 	gpg->complete = FALSE;
-	gpg->await_read = FALSE;
-	gpg->reading = 0;
+	gpg->seen_eof1 = FALSE;
+	gpg->seen_eof2 = FALSE;
 	gpg->pid = (pid_t) -1;
 	
 	gpg->path = g_strdup (path);
@@ -787,7 +787,6 @@ gpg_ctx_parse_status (struct _GpgCtx *gpg, CamelException *ex)
 		case GPG_CTX_MODE_SIGN:
 			if (!strncmp (status, "SIG_CREATED ", 12)) {
 				gpg->complete = TRUE;
-				gpg->await_read = TRUE;
 			}
 			break;
 		case GPG_CTX_MODE_VERIFY:
@@ -804,21 +803,23 @@ gpg_ctx_parse_status (struct _GpgCtx *gpg, CamelException *ex)
 				} 
 				
 				gpg->complete = TRUE;
+				
+				/* Since verifying a signature will never produce output
+				   on gpg's stdout descriptor, we use this EOF bit for
+				   making sure that we get a TRUST metric. */
+				gpg->seen_eof1 = TRUE;
 			} else if (!strncmp (status, "VALIDSIG", 8)) {
 				gpg->validsig = TRUE;
-				gpg->complete = TRUE;
 			} else if (!strncmp (status, "BADSIG", 6)) {
 				gpg->validsig = FALSE;
-				gpg->complete = TRUE;
 			} else if (!strncmp (status, "ERRSIG", 6)) {
 				/* Note: NO_PUBKEY often comes after an ERRSIG, but do we really care? */
 				gpg->validsig = FALSE;
-				gpg->complete = TRUE;
 			}
 			break;
 		case GPG_CTX_MODE_ENCRYPT:
 			if (!strncmp (status, "BEGIN_ENCRYPTION", 16)) {
-				gpg->await_read = TRUE;
+				/* nothing to do... but we know to expect data on stdout soon */
 			} else if (!strncmp (status, "END_ENCRYPTION", 14)) {
 				gpg->complete = TRUE;
 			} else if (!strncmp (status, "NO_RECP", 7)) {
@@ -829,7 +830,7 @@ gpg_ctx_parse_status (struct _GpgCtx *gpg, CamelException *ex)
 			break;
 		case GPG_CTX_MODE_DECRYPT:
 			if (!strncmp (status, "BEGIN_DECRYPTION", 16)) {
-				gpg->await_read = TRUE;
+				/* nothing to do... but we know to expect data on stdout soon */
 			} else if (!strncmp (status, "END_DECRYPTION", 14)) {
 				gpg->complete = TRUE;
 			}
@@ -930,7 +931,7 @@ gpg_ctx_op_step (struct _GpgCtx *gpg, CamelException *ex)
 	   can to all of them. If one fails along the way, return
 	   -1. */
 	
-	if (FD_ISSET (gpg->status_fd, &rdset) && !gpg->complete) {
+	if (FD_ISSET (gpg->status_fd, &rdset)) {
 		/* read the status message and decide what to do... */
 		char buffer[4096];
 		ssize_t nread;
@@ -951,7 +952,6 @@ gpg_ctx_op_step (struct _GpgCtx *gpg, CamelException *ex)
 		}
 	}
 	
-	gpg->reading--;
 	if (FD_ISSET (gpg->stdout, &rdset) && gpg->ostream) {
 		char buffer[4096];
 		ssize_t nread;
@@ -967,11 +967,8 @@ gpg_ctx_op_step (struct _GpgCtx *gpg, CamelException *ex)
 		if (nread > 0) {
 			if (camel_stream_write (gpg->ostream, buffer, (size_t) nread) == -1)
 				goto exception;
-			
-			gpg->await_read = FALSE;
-			
-			/* make sure we don't exit before reading all the data... */
-			gpg->reading = 3;
+		} else {
+			gpg->seen_eof1 = TRUE;
 		}
 	}
 	
@@ -989,9 +986,8 @@ gpg_ctx_op_step (struct _GpgCtx *gpg, CamelException *ex)
 		
 		if (nread > 0) {
 			g_byte_array_append (gpg->diagnostics, buffer, nread);
-			
-			/* make sure we don't exit before reading all the data... */
-			gpg->reading = 3;
+		} else {
+			gpg->seen_eof2 = TRUE;
 		}
 	}
 	
@@ -1094,7 +1090,7 @@ gpg_ctx_op_step (struct _GpgCtx *gpg, CamelException *ex)
 static gboolean
 gpg_ctx_op_complete (struct _GpgCtx *gpg)
 {
-	return gpg->complete && !gpg->await_read && !gpg->reading;
+	return gpg->complete && gpg->seen_eof1 && gpg->seen_eof2;
 }
 
 static void