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fix a grep bug

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This commit is contained in:
Robert Morris 2019-09-05 16:50:55 -04:00
parent c0beeccb1b
commit fc337af2b6
1 changed files with 0 additions and 2 deletions
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user/grep.c
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@ -26,8 +26,6 @@ grep(char *pattern, int fd)
} }
p = q+1; p = q+1;
} }
if(p == buf)
m = 0;
if(m > 0){ if(m > 0){
m -= p - buf; m -= p - buf;
memmove(buf, p, m); memmove(buf, p, m);