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authorJonathan Nieder <jrnieder@gmail.com>2011-01-03 03:09:38 (GMT)
committerJonathan Nieder <jrnieder@gmail.com>2011-02-26 10:59:37 (GMT)
commitcb3f87cf1ba90373fdc240d65a4d65434099d9a3 (patch)
treeea9094dc1cf3c5f96df6d6fe56dee306aaddac5f
parentcc193f1f0b45e4e65f246f1d5e6e8134844aa35b (diff)
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vcs-svn: allow input from file descriptor
Based-on-patch-by: David Barr <david.barr@cordelta.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
-rwxr-xr-xt/t0081-line-buffer.sh9
-rw-r--r--test-line-buffer.c11
-rw-r--r--vcs-svn/line_buffer.c8
-rw-r--r--vcs-svn/line_buffer.h1
-rw-r--r--vcs-svn/line_buffer.txt9
5 files changed, 31 insertions, 7 deletions
diff --git a/t/t0081-line-buffer.sh b/t/t0081-line-buffer.sh
index a8eeb20..550fad0 100755
--- a/t/t0081-line-buffer.sh
+++ b/t/t0081-line-buffer.sh
@@ -131,6 +131,15 @@ test_expect_success PIPE,EXPENSIVE 'longer read (around 65536 bytes)' '
long_read_test 65536
'
+test_expect_success 'read from file descriptor' '
+ rm -f input &&
+ echo hello >expect &&
+ echo hello >input &&
+ echo copy 6 |
+ test-line-buffer "&4" 4<input >actual &&
+ test_cmp expect actual
+'
+
test_expect_success 'buffer_read_string copes with null byte' '
>expect &&
q_to_nul <<-\EOF | test-line-buffer >actual &&
diff --git a/test-line-buffer.c b/test-line-buffer.c
index 19bf2d4..25b20b9 100644
--- a/test-line-buffer.c
+++ b/test-line-buffer.c
@@ -69,13 +69,18 @@ int main(int argc, char *argv[])
else if (argc == 2)
filename = argv[1];
else
- usage("test-line-buffer [file] < script");
+ usage("test-line-buffer [file | &fd] < script");
if (buffer_init(&stdin_buf, NULL))
die_errno("open error");
if (filename) {
- if (buffer_init(&file_buf, filename))
- die_errno("error opening %s", filename);
+ if (*filename == '&') {
+ if (buffer_fdinit(&file_buf, strtouint32(filename + 1)))
+ die_errno("error opening fd %s", filename + 1);
+ } else {
+ if (buffer_init(&file_buf, filename))
+ die_errno("error opening %s", filename);
+ }
input = &file_buf;
}
diff --git a/vcs-svn/line_buffer.c b/vcs-svn/line_buffer.c
index 37ec56e..e29a81a 100644
--- a/vcs-svn/line_buffer.c
+++ b/vcs-svn/line_buffer.c
@@ -17,6 +17,14 @@ int buffer_init(struct line_buffer *buf, const char *filename)
return 0;
}
+int buffer_fdinit(struct line_buffer *buf, int fd)
+{
+ buf->infile = fdopen(fd, "r");
+ if (!buf->infile)
+ return -1;
+ return 0;
+}
+
int buffer_deinit(struct line_buffer *buf)
{
int err;
diff --git a/vcs-svn/line_buffer.h b/vcs-svn/line_buffer.h
index 0a59c73..630d83c 100644
--- a/vcs-svn/line_buffer.h
+++ b/vcs-svn/line_buffer.h
@@ -13,6 +13,7 @@ struct line_buffer {
#define LINE_BUFFER_INIT {"", STRBUF_INIT, NULL}
int buffer_init(struct line_buffer *buf, const char *filename);
+int buffer_fdinit(struct line_buffer *buf, int fd);
int buffer_deinit(struct line_buffer *buf);
char *buffer_read_line(struct line_buffer *buf);
char *buffer_read_string(struct line_buffer *buf, uint32_t len);
diff --git a/vcs-svn/line_buffer.txt b/vcs-svn/line_buffer.txt
index f8eaa4d..4e8fb71 100644
--- a/vcs-svn/line_buffer.txt
+++ b/vcs-svn/line_buffer.txt
@@ -27,10 +27,11 @@ resources.
Functions
---------
-`buffer_init`::
- Open the named file for input. If filename is NULL,
- start reading from stdin. On failure, returns -1 (with
- errno indicating the nature of the failure).
+`buffer_init`, `buffer_fdinit`::
+ Open the named file or file descriptor for input.
+ buffer_init(buf, NULL) prepares to read from stdin.
+ On failure, returns -1 (with errno indicating the nature
+ of the failure).
`buffer_deinit`::
Stop reading from the current file (closing it unless