Dmitry V. Levin
fcb94cded0
* swapon.c (SYS_FUNC(swapon)): Print priority regardless of SWAP_FLAG_PREFER flag being set. * tests/swap.c (error_msg): Handle EINVAL. (main): Check decoding of swapon flags.
63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
#include "tests.h"
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#include <sys/syscall.h>
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#if defined __NR_swapon && defined __NR_swapoff
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# include <errno.h>
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# include <stdio.h>
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# include <sys/swap.h>
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# include <unistd.h>
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static const char *
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error_msg(int error_num)
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{
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switch (error_num) {
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case ENOSYS: return "ENOSYS";
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case EPERM: return "EPERM";
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case EINVAL: return "EINVAL";
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default: return "ENOENT";
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}
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}
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int
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main(void)
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{
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static const char sample[] = "swap.sample";
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int rc = syscall(__NR_swapon, sample, 0);
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printf("swapon(\"%s\", 0) = %d %s (%m)\n",
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sample, rc, error_msg(errno));
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rc = syscall(__NR_swapon, sample, 42);
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printf("swapon(\"%s\", %s) = %d %s (%m)\n",
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sample, "42", rc, error_msg(errno));
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rc = syscall(__NR_swapon, sample, SWAP_FLAG_PREFER);
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printf("swapon(\"%s\", %s) = %d %s (%m)\n",
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sample, "SWAP_FLAG_PREFER", rc, error_msg(errno));
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rc = syscall(__NR_swapon, sample, SWAP_FLAG_PREFER | 42);
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printf("swapon(\"%s\", %s) = %d %s (%m)\n",
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sample, "SWAP_FLAG_PREFER|42", rc, error_msg(errno));
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rc = syscall(__NR_swapon, sample, -1L);
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printf("swapon(\"%s\", %s) = %d %s (%m)\n",
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sample,
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"SWAP_FLAG_PREFER|SWAP_FLAG_DISCARD|SWAP_FLAG_DISCARD_ONCE"
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"|SWAP_FLAG_DISCARD_PAGES|0xfff80000|32767",
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rc, error_msg(errno));
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rc = syscall(__NR_swapoff, sample);
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printf("swapoff(\"%s\") = %d %s (%m)\n",
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sample, rc, error_msg(errno));
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puts("+++ exited with 0 +++");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_swapon && __NR_swapoff")
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#endif
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