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aakbar5/dup2_usage.c

Last active December 27, 2019 11:37
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dup2 usage
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dup2_usage.c
// A simple example of how dup2 can be used
const char* msg = "Text written by standard file descriptor\n";
int fd = open("dup2_test.txt", O_RDWR | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
write(fd, msg, strlen(msg));
/* Map stdout to our file */
dup2(fd, STDOUT_FILENO);
printf("Text written by dup @ stdout file descriptor\n");
close(fd);
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