54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
#include <stdio.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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int main(int argc, char *argv[])
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{
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int fcp[2];
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int fpc[2];
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pid_t pid;
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if (pipe(fcp) == -1)
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{
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printf("pipe failed\n");
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return -1;
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}
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if (pipe(fpc) == -1)
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{
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printf("pipe failed\n");
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return -1;
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}
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if ((pid = fork()) != -1)
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{
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if (pid == 0)
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{
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// child
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// char const *arg[3];
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// arg[0] = "bc";
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// arg[1] = "-l";
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// arg[2] = NULL;-
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close(fpc[1]);
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close(fcp[0]);
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char *buf = malloc(sizeof(char) * 1000);
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const char *prefix = "INPUT: ";
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memcpy(buf, prefix, strlen(prefix) + 1);
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read(fpc[0], buf + (strlen(prefix)), 1000 - strlen(prefix) - 1);
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write(fcp[1], buf, 1000);
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// execvp(arg[0], arg);
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}
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else
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{
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// parent
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close(fpc[0]);
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close(fcp[1]);
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const char *data = "testdata";
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char *buf = malloc(sizeof(char) * 1000);
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// write(fpc[1], data, strlen(data) + 1);
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FILE *fd = fopen(fpc[1], "w");
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fprintf(fd, "ddd");
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read(fcp[0], buf, 1000);
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printf("%s\n", buf);
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}
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}
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} |