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| ListPtr make_filelist(const char *dirname); |
Constructs a linked list containing names of the
entries in the specified directory. Returns a pointer to
the first element of the list. Returns NULL if dirname
couldn't be opened as a directory. |
| void free_filelist(ListPtr p); |
Frees a linked list constructed by make_filelist. |
| void *emalloc(size_t nbytes); |
Allocates the specified amount of memory, prints
error message and exits program if allocation fails. |
| char *savestr(char *s); |
Saves a copy of string pointed to by s, returns pointer
to the saved copy. |
| void die(int syserr, const char *fmt, ...); |
Exits program with a specified error message;
parameters following syserr are the same as printf. If syserr
is non-zero, prints a system error message as well. |
| void warn(int syserr, const char *fmt, ...); |
Prints the specified error message; parameters
following syserr are the same as printf. If syserr is non-zero,
prints a system error message as well. |
| void errmesg(int syserr, const char *fmt,, va_list ap); |
Prints error message to stderr; called by both die() and
warn(). |
