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Signed-off-by: Daeho Jeong Reviewed-by: Chao Yu --- 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 r= ange .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, con= st struct cmd_desc *cmd) printf("\n"); } =20 +#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 !=3D 3) { + fputs("Excess arguments\n\n", stderr); + fputs(cmd->cmd_help, stderr); + exit(1); + } + + length =3D atoll(argv[1]); + fd =3D xopen(argv[2], O_WRONLY, 0); + + ret =3D 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[] =3D { CMD(removexattr), CMD(lseek), CMD(get_advise), + CMD(ftruncate), { NULL, NULL, NULL, NULL, 0 } }; =20 --=20 2.48.1.711.g2feabab25a-goog