Created
January 30, 2019 08:42
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#include <stdlib.h> | |
#include <unistd.h> | |
#include <string.h> | |
#include <sys/types.h> | |
#include <stdio.h> | |
#include <fcntl.h> | |
int main(int argc, char **argv, char **envp) | |
{ | |
char buf[1024]; | |
int fd, rc; | |
if(argc == 1) { | |
printf("%s [file to read]\n", argv[0]); | |
exit(EXIT_FAILURE); | |
} | |
if(strstr(argv[1], "token") != NULL) { | |
printf("You may not access '%s'\n", argv[1]); | |
exit(EXIT_FAILURE); | |
} | |
fd = open(argv[1], O_RDONLY); | |
if(fd == -1) { | |
err(EXIT_FAILURE, "Unable to open %s", argv[1]); | |
} | |
rc = read(fd, buf, sizeof(buf)); | |
if(rc == -1) { | |
err(EXIT_FAILURE, "Unable to read fd %d", fd); | |
} | |
write(1, buf, rc); | |
} |
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