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Fri, 28 Feb 2025 10:47:58 -0800 (PST) Received: from daehojeong-desktop.mtv.corp.google.com ([2a00:79e0:2e14:7:adc7:2cc2:39e7:4e21]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2fea696d58esm4164285a91.30.2025.02.28.10.47.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Feb 2025 10:47:58 -0800 (PST) From: Daeho Jeong To: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, kernel-team@android.com Date: Fri, 28 Feb 2025 10:47:52 -0800 Message-ID: <20250228184752.1668252-1-daeho43@gmail.com> X-Mailer: git-send-email 2.48.1.711.g2feabab25a-goog MIME-Version: 1.0 X-Headers-End: 1to5P7-0007vs-Ks Subject: [f2fs-dev] [PATCH v2] f2fs-tools: add ftruncate command in f2fs_io X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Daeho Jeong Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net From: Daeho Jeong add ftruncate command to do file truncate. 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 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 } };