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tee: get rid of openf[100] array and just dup() filedescriptors to 3+[0..n-1]

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This commit is contained in:
cinap_lenrek 2014-12-21 05:12:56 +01:00
parent 468851cde6
commit 127f8f0480
1 changed files with 16 additions and 10 deletions
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26
sys/src/cmd/tee.c
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@ -5,9 +5,12 @@
#include <u.h>
#include <libc.h>
enum {
FDSTART = 3,
};
int uflag;
int aflag;
int openf[100];
char in[8192];
@ -42,26 +45,29 @@ main(int argc, char **argv)
n = 0;
while(*argv) {
if(aflag) {
openf[n] = open(argv[0], OWRITE);
if(openf[n] < 0)
openf[n] = create(argv[0], OWRITE, 0666);
seek(openf[n], 0L, 2);
i = open(argv[0], OWRITE);
if(i < 0)
i = create(argv[0], OWRITE, 0666);
seek(i, 0L, 2);
} else
openf[n] = create(argv[0], OWRITE, 0666);
if(openf[n] < 0) {
i = create(argv[0], OWRITE, 0666);
if(i < 0) {
fprint(2, "tee: cannot open %s: %r\n", argv[0]);
} else
} else {
if(i != n+FDSTART)
dup(i, n+FDSTART);
n++;
}
argv++;
}
openf[n++] = 1;
for(;;) {
r = read(0, in, sizeof in);
if(r <= 0)
exits(nil);
for(i=0; i<n; i++)
write(openf[i], in, r);
write(i+FDSTART, in, r);
write(1, in, r);
}
}