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#ifndef SYSTEM_H
#define SYSTEM_H
/* Routines for interacting with the system, mainly executing processes and
* dealing with the file system. */
/* Used when encrypting or decrypting a file, see the copy_file_with_encryption
* function. */
enum encrypt {
ENCRYPT,
DECRYPT
};
/* Return whether PATH exists in the file system. Exit if any non-"file not
* fount" error occurs. */
int file_exists(const char *path);
/* Copy the file whose path is IN at path OUT. OUT is created or overwritten if
* needed. */
void copy_file(const char *in, const char *out);
/* Like copy_file but with encryption, which is managed using GPG. */
void copy_file_with_encryption(const char *in, const char *out, enum encrypt encrypt);
/* Execute command in a child process, then wait for the child to exit before
* returning. If any error occurs, including in the child process, then if EXIT
* is non-zero, exit, else return -1. Return 0 on success. */
int ftag_execvp(char *const *cmd, int can_exit);
#endif
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