[PATCH 3/5] scripts/common: Add write_file()

[Sascha Hauer]

write_file() is used once, but can be used in socfpga_mkimage.c as
well. Move function to a common place and use it in the SoCFPGA image
tool.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 scripts/bareboximd.c      | 25 -------------------------
 scripts/common.c          | 30 ++++++++++++++++++++++++++++++
 scripts/common.h          |  1 +
 scripts/socfpga_mkimage.c | 31 +++++--------------------------
 4 files changed, 36 insertions(+), 51 deletions(-)

diff --git a/scripts/bareboximd.c b/scripts/bareboximd.c
index 8f059f46d0..a734399aa5 100644
--- a/scripts/bareboximd.c
+++ b/scripts/bareboximd.c
@@ -42,31 +42,6 @@ int imd_command_setenv(const char *variable_name, const char *value)
 	return -EINVAL;
 }
 
-static int write_file(const char *filename, const void *buf, size_t size)
-{
-	int fd, ret = 0;
-	int now;
-
-	fd = open(filename, O_WRONLY | O_TRUNC | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
-	if (fd < 0)
-		return fd;
-
-	while (size) {
-		now = write(fd, buf, size);
-		if (now < 0) {
-			ret = now;
-			goto out;
-		}
-		size -= now;
-		buf += now;
-	}
-
-out:
-	close(fd);
-
-	return ret;
-}
-
 static inline void read_file_2_free(void *buf)
 {
 	/*
diff --git a/scripts/common.c b/scripts/common.c
index f28cddc71a..5e0139278a 100644
--- a/scripts/common.c
+++ b/scripts/common.c
@@ -100,3 +100,33 @@ void *read_file(const char *filename, size_t *size)
 
 	return NULL;
 }
+
+int write_file(const char *filename, const void *buf, size_t size)
+{
+	int fd, ret = 0;
+	int now;
+
+	fd = open(filename, O_WRONLY | O_TRUNC | O_CREAT,
+		  S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+	if (fd < 0) {
+		fprintf(stderr, "Cannot open %s: %s\n", filename, strerror(errno));
+		return -errno;
+	}
+
+	while (size) {
+		now = write(fd, buf, size);
+		if (now < 0) {
+			fprintf(stderr, "Cannot write to %s: %s\n", filename,
+				strerror(errno));
+			ret = -errno;
+			goto out;
+		}
+		size -= now;
+		buf += now;
+	}
+
+out:
+	close(fd);
+
+	return ret;
+}
diff --git a/scripts/common.h b/scripts/common.h
index 0153ebe93f..a15691f039 100644
--- a/scripts/common.h
+++ b/scripts/common.h
@@ -3,5 +3,6 @@
 
 int read_file_2(const char *filename, size_t *size, void **outbuf, size_t max_size);
 void *read_file(const char *filename, size_t *size);
+int write_file(const char *filename, const void *buf, size_t size);
 
 #endif /* __COMMON_H */
diff --git a/scripts/socfpga_mkimage.c b/scripts/socfpga_mkimage.c
index 73dfbeae3a..3ef41edf8f 100644
--- a/scripts/socfpga_mkimage.c
+++ b/scripts/socfpga_mkimage.c
@@ -10,6 +10,9 @@
 #include <fcntl.h>
 #include <endian.h>
 
+#include "../common.h"
+#include "../common.c"
+
 #define VALIDATION_WORD 0x31305341
 
 #define BRANCH_INST 0xea /* ARM opcode for "b" (unconditional branch) */
@@ -85,22 +88,6 @@ static int read_full(int fd, void *buf, size_t size)
 	return insize;
 }
 
-static int write_full(int fd, void *buf, size_t size)
-{
-	size_t insize = size;
-	int now;
-
-	while (size) {
-		now = write(fd, buf, size);
-		if (now <= 0)
-			return now;
-		size -= now;
-		buf += now;
-	}
-
-	return insize;
-}
-
 static const uint32_t crc_table[256] = {
 	0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
 	0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
@@ -381,17 +368,9 @@ int main(int argc, char *argv[])
 	if (ret)
 		exit(1);
 
-	fd = open(outfile, O_WRONLY | O_CREAT | O_TRUNC, 0644);
-	if (fd < 0) {
-		perror("open outfile");
-		exit(1);
-	}
-
-	ret = write_full(fd, buf, s.st_size + 4 + addsize + pad);
-	if (ret < 0) {
-		perror("write outfile");
+	ret = write_file(outfile, buf, s.st_size + 4 + addsize + pad);
+	if (ret)
 		exit(1);
-	}
 
 	exit(0);
 }
-- 
2.30.2