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fgrep: Don't repeat old incoming data if fgets() failed.

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This commit is contained in:
Andreas Kling 2019-04-25 14:07:17 +02:00
parent d5578826af
commit aa84e2fc64
1 changed files with 4 additions and 2 deletions
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6
Userland/fgrep.cpp
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@ -1,6 +1,7 @@
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
#include <unistd.h> #include <unistd.h>
#include <assert.h>
int main(int argc, char** argv) int main(int argc, char** argv)
{ {
@ -10,11 +11,12 @@ int main(int argc, char** argv)
} }
for (;;) { for (;;) {
char buf[4096]; char buf[4096];
fgets(buf, sizeof(buf), stdin); auto* str = fgets(buf, sizeof(buf), stdin);
if (strstr(buf, argv[1])) if (str && strstr(str, argv[1]))
write(1, buf, strlen(buf)); write(1, buf, strlen(buf));
if (feof(stdin)) if (feof(stdin))
return 0; return 0;
ASSERT(str);
} }
return 0; return 0;
} }