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view uprogs/forktest.c @ 11:0157781eb6c2 default tip
add entry point
author | mir3636 |
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date | Tue, 25 Dec 2018 19:06:09 +0900 |
parents | c450faca55f4 |
children |
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// Test that fork fails gracefully. // Tiny executable so that the limit can be filling the proc table. #include "types.h" #include "stat.h" #include "user.h" #define N 1000 void printf(int fd, char *s, ...) { write(fd, s, strlen(s)); } void forktest(void) { int n, pid; printf(1, "fork test\n"); for(n=0; n<N; n++){ pid = fork(); if(pid < 0) break; if(pid == 0) exit(); } if(n == N){ printf(1, "fork claimed to work N times!\n", N); exit(); } for(; n > 0; n--){ if(wait() < 0){ printf(1, "wait stopped early\n"); exit(); } } if(wait() != -1){ printf(1, "wait got too many\n"); exit(); } printf(1, "fork test OK\n"); } int main(void) { forktest(); exit(); }