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util: implement fd_nonbloc()/fd_cloexec()

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This commit is contained in:
Lennart Poettering 2010-04-06 21:53:02 +02:00
parent 7418040c3a
commit 3a0ecb08f4
2 changed files with 42 additions and 0 deletions
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39
util.c
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@ -32,6 +32,7 @@
#include <linux/sched.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "macro.h"
#include "util.h"
@ -1084,6 +1085,44 @@ bool ignore_file(const char *filename) {
endswith(filename, ".swp");
}
int fd_nonblock(int fd, bool nonblock) {
int flags;
assert(fd >= 0);
if ((flags = fcntl(fd, F_GETFL, 0)) < 0)
return -errno;
if (nonblock)
flags |= O_NONBLOCK;
else
flags &= ~O_NONBLOCK;
if (fcntl(fd, F_SETFL, flags) < 0)
return -errno;
return 0;
}
int fd_cloexec(int fd, bool cloexec) {
int flags;
assert(fd >= 0);
if ((flags = fcntl(fd, F_GETFD, 0)) < 0)
return -errno;
if (cloexec)
flags |= FD_CLOEXEC;
else
flags &= ~FD_CLOEXEC;
if (fcntl(fd, F_SETFD, flags) < 0)
return -errno;
return 0;
}
static const char *const ioprio_class_table[] = {
[IOPRIO_CLASS_NONE] = "none",
[IOPRIO_CLASS_RT] = "realtime",

3
util.h
View File

@ -172,6 +172,9 @@ bool ignore_file(const char *filename);
struct __useless_struct_to_allow_trailing_semicolon__
int fd_nonblock(int fd, bool nonblock);
int fd_cloexec(int fd, bool cloexec);
const char *ioprio_class_to_string(int i);
int ioprio_class_from_string(const char *s);