2 * Copyright 2012 (C) Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 * SPDX-License-Identifier: MIT
8 #ifndef _LTTNG_CTL_MEMSTREAM_H
9 #define _LTTNG_CTL_MEMSTREAM_H
11 #ifdef LTTNG_HAVE_FMEMOPEN
15 FILE *lttng_fmemopen(void *buf
, size_t size
, const char *mode
)
17 return fmemopen(buf
, size
, mode
);
20 #else /* LTTNG_HAVE_FMEMOPEN */
26 * Fallback for systems which don't have fmemopen. Copy buffer to a
27 * temporary file, and use that file as FILE * input.
30 FILE *lttng_fmemopen(void *buf
, size_t size
, const char *mode
)
32 char tmpname
[PATH_MAX
];
38 * Support reading only.
40 if (strcmp(mode
, "rb") != 0) {
43 strncpy(tmpname
, "/tmp/lttng-tmp-XXXXXX", PATH_MAX
);
44 ret
= mkstemp(tmpname
);
49 * We need to write to the file.
51 fp
= fdopen(ret
, "w+");
55 /* Copy the entire buffer to the file */
56 len
= fwrite(buf
, sizeof(char), size
, fp
);
60 ret
= fseek(fp
, 0L, SEEK_SET
);
65 /* We keep the handle open, but can unlink the file on the VFS. */
66 ret
= unlink(tmpname
);
78 ret
= unlink(tmpname
);
85 #endif /* LTTNG_HAVE_FMEMOPEN */
87 #endif /* _LTTNG_CTL_MEMSTREAM_H */
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