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utils: Add convenience function for setting fd flags

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There are many places in the code base where we ignore the return value
of fcntl() when getting/setting file descriptior flags. This patch
introduces a convenience function that allows setting or clearing file
descriptor flags and will also log an error on failure for later
analysis.

Change-Id: I8b81901e1b1bd537ca632567cdb408931c6eded7
This commit is contained in:
Sean Bright
2017-12-07 10:52:39 -05:00
parent b0b28446c1
commit 2ffe52a116
17 changed files with 100 additions and 78 deletions
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8
channels/vgrabbers.c
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@@ -226,12 +226,8 @@ static void *grab_v4l1_open(const char *dev, struct fbuf_t *geom, int fps)
v->b = *geom;
b = &v->b; /* shorthand */
i = fcntl(fd, F_GETFL);
if (-1 == fcntl(fd, F_SETFL, i | O_NONBLOCK)) {
/* non fatal, just emit a warning */
ast_log(LOG_WARNING, "error F_SETFL for %s [%s]\n",
dev, strerror(errno));
}
ast_fd_set_flags(fd, O_NONBLOCK);
/* set format for the camera.
* In principle we could retry with a different format if the
* one we are asking for is not supported.