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75 lines
1.4 KiB
75 lines
1.4 KiB
#include <litc.h>
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static char buf[1024];
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void fillbuf(char c)
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{
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int i;
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for (i = 0; i < sizeof(buf); i++)
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buf[i] = c;
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}
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void chk(int fd, char c)
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{
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if (read(fd, buf, sizeof(buf)) != sizeof(buf))
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errx(-1, "short read");
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int i;
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for (i = 0; i < sizeof(buf); i++)
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if (buf[i] != c)
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errx(-1, "byte mismatch");
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}
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int main(int argc, char **argv)
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{
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int fd;
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if ((fd = open("/newfile", O_RDWR|O_CREAT, 0755)) < 0)
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errx(fd, "create failed");
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fillbuf('A');
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if (write(fd, buf, sizeof(buf)) != sizeof(buf))
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errx(-1, "short write");
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if (unlink("/newfile") != 0)
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errx(-1, "should have succeeded");
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printf("erased...\n");
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if ((fd = open("/yetanother", O_RDWR|O_CREAT, 0755)) < 0)
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errx(fd, "create failed");
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int fd2;
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if ((fd2 = open("/evenmore", O_RDWR|O_CREAT, 0755)) < 0)
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errx(fd2, "create failed");
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printf("filing two...\n");
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fillbuf('B');
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if (write(fd, buf, sizeof(buf)) != sizeof(buf))
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errx(-1, "short write");
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printf("first fill...\n");
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fillbuf('C');
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if (write(fd2, buf, sizeof(buf)) != sizeof(buf))
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errx(-1, "short write");
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if (close(fd) != 0)
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errx(-1, "close");
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if (close(fd2) != 0)
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errx(-1, "close");
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printf("checking contents...\n");
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if ((fd = open("/yetanother", O_RDONLY, 0)) < 0)
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errx(fd, "open original failed");
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chk(fd, 'B');
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if ((fd2 = open("/evenmore", O_RDONLY, 0755)) < 0)
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errx(fd2, "create failed");
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chk(fd2, 'C');
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printf("success\n");
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return 0;
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}
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