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37 lines
762 B
37 lines
762 B
#include "run.h" |
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/* Contains builtin functions and code for executing system programs */ |
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int change_dir(char *dir) { |
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return chdir(dir); |
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} |
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/* Fork and exec a command given in args taking input from in and sending |
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* output to out. The arguments array must end in a NULL. |
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* |
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* Returns true on success or 1 on failure. |
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*/ |
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int execute(FILE *in, FILE *out, char *args[], pid_t* child_ID) { |
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int in_FD = fileno(in); |
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int out_FD = fileno(out); |
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int err = fork(); |
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if (err == -1) { |
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return ER_FAIL_TO_FORK; |
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} |
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if (err) { // parent |
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*child_ID = err; |
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return ER_SUCCESS; |
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} else { // child |
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dup2(in_FD, 0); |
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dup2(out_FD, 1); |
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err = execvp(args[0], args); |
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} |
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return ER_SUCCESS; |
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} |
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