From: Daeho Jeong <daehoje...@google.com>
add ftruncate command to do file truncate.
Signed-off-by: Daeho Jeong <daehoje...@google.com>
---
v2: update f2fs_io documentation
---
man/f2fs_io.8 | 3 +++
tools/f2fs_io/f2fs_io.c | 26 ++++++++++++++++++++++++++
2 files changed, 29 insertions(+)
diff --git a/man/f2fs_io.8 b/man/f2fs_io.8
index 2ff22f7..648fba6 100644
--- a/man/f2fs_io.8
+++ b/man/f2fs_io.8
@@ -180,6 +180,9 @@ Trigger gc to move data blocks from specified address range
.TP
\fBget_advise\fR \fI[file]\fR
Get i_advise value and info in file
+.TP
+\fBftruncate\fR \fI[length] [file_path]\fR
+Do ftruncate a file in file_path with the length
.SH AUTHOR
This version of
.B f2fs_io
diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c
index fa01f8f..08056a9 100644
--- a/tools/f2fs_io/f2fs_io.c
+++ b/tools/f2fs_io/f2fs_io.c
@@ -1887,6 +1887,31 @@ static void do_get_advise(int argc, char **argv, const
struct cmd_desc *cmd)
printf("\n");
}
+#define ftruncate_desc "ftruncate a file"
+#define ftruncate_help \
+"f2fs_io ftruncate [length] [file_path]\n\n" \
+"Do ftruncate a file in file_path with the length\n" \
+
+static void do_ftruncate(int argc, char **argv, const struct cmd_desc *cmd)
+{
+ int fd, ret;
+ off_t length;
+
+ if (argc != 3) {
+ fputs("Excess arguments\n\n", stderr);
+ fputs(cmd->cmd_help, stderr);
+ exit(1);
+ }
+
+ length = atoll(argv[1]);
+ fd = xopen(argv[2], O_WRONLY, 0);
+
+ ret = ftruncate(fd, length);
+ if (ret < 0)
+ die_errno("ftruncate failed");
+ exit(0);
+}
+
#define CMD_HIDDEN 0x0001
#define CMD(name) { #name, do_##name, name##_desc, name##_help, 0 }
#define _CMD(name) { #name, do_##name, NULL, NULL, CMD_HIDDEN }
@@ -1932,6 +1957,7 @@ const struct cmd_desc cmd_list[] = {
CMD(removexattr),
CMD(lseek),
CMD(get_advise),
+ CMD(ftruncate),
{ NULL, NULL, NULL, NULL, 0 }
};
--
2.48.1.711.g2feabab25a-goog
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
