[Qemu-devel] [PATCH v3 2/5] cpus: convert qmp_memsave/qmp_pmemsave to use qemu_open

[Simon Ruderich]

qemu_open() allows passing file descriptors to qemu which is used in
restricted environments like libvirt where open() is prohibited.

Suggested-by: Eric Blake <address@hidden>
Signed-off-by: Simon Ruderich <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
---
 cpus.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/cpus.c b/cpus.c
index 4b1609fe90..7fd8d3c32e 100644
--- a/cpus.c
+++ b/cpus.c
@@ -2291,7 +2291,7 @@ CpuInfoFastList *qmp_query_cpus_fast(Error **errp)
 void qmp_memsave(int64_t addr, int64_t size, const char *filename,
                  bool has_cpu, int64_t cpu_index, Error **errp)
 {
-    FILE *f;
+    int fd;
     uint32_t l;
     CPUState *cpu;
     uint8_t buf[1024];
@@ -2308,8 +2308,8 @@ void qmp_memsave(int64_t addr, int64_t size, const char 
*filename,
         return;
     }
 
-    f = fopen(filename, "wb");
-    if (!f) {
+    fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0600);
+    if (fd < 0) {
         error_setg_file_open(errp, errno, filename);
         return;
     }
@@ -2324,7 +2324,7 @@ void qmp_memsave(int64_t addr, int64_t size, const char 
*filename,
                              " specified", orig_addr, orig_size);
             goto exit;
         }
-        if (fwrite(buf, 1, l, f) != l) {
+        if (qemu_write_full(fd, buf, l) != l) {
             error_setg(errp, QERR_IO_ERROR);
             goto exit;
         }
@@ -2333,18 +2333,18 @@ void qmp_memsave(int64_t addr, int64_t size, const char 
*filename,
     }
 
 exit:
-    fclose(f);
+    qemu_close(fd);
 }
 
 void qmp_pmemsave(int64_t addr, int64_t size, const char *filename,
                   Error **errp)
 {
-    FILE *f;
+    int fd;
     uint32_t l;
     uint8_t buf[1024];
 
-    f = fopen(filename, "wb");
-    if (!f) {
+    fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0600);
+    if (fd < 0) {
         error_setg_file_open(errp, errno, filename);
         return;
     }
@@ -2355,7 +2355,7 @@ void qmp_pmemsave(int64_t addr, int64_t size, const char 
*filename,
             l = size;
         }
         cpu_physical_memory_read(addr, buf, l);
-        if (fwrite(buf, 1, l, f) != l) {
+        if (qemu_write_full(fd, buf, l) != l) {
             error_setg(errp, QERR_IO_ERROR);
             goto exit;
         }
@@ -2364,7 +2364,7 @@ void qmp_pmemsave(int64_t addr, int64_t size, const char 
*filename,
     }
 
 exit:
-    fclose(f);
+    qemu_close(fd);
 }
 
 void qmp_inject_nmi(Error **errp)
-- 
2.15.0