1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/pwd.c	Thu Aug 25 08:53:01 2011 +0300
     1.3 @@ -0,0 +1,39 @@
     1.4 +/*! gcc -std=c89 -pedantic -Wall -o pwd pwd.c */
     1.5 +#include <stdio.h>
     1.6 +#include <stdlib.h>
     1.7 +#include <string.h>
     1.8 +#include <errno.h>
     1.9 +#include <unistd.h>
    1.10 +
    1.11 +int main(void)
    1.12 +{
    1.13 +	char *tmp, *wdbuf;
    1.14 +	size_t bufsz = 64;
    1.15 +
    1.16 +	if(!(wdbuf = malloc(bufsz))) {
    1.17 +		perror("malloc failed");
    1.18 +		return 1;
    1.19 +	}
    1.20 +
    1.21 +	while(!(tmp = getcwd(wdbuf, bufsz)) && errno == ERANGE) {
    1.22 +		size_t newsz = bufsz ? bufsz * 2 : 2;
    1.23 +
    1.24 +		if(!(tmp = realloc(wdbuf, newsz))) {
    1.25 +			fprintf(stderr, "failed to allocate: %u bytes: %s\n", (unsigned int)newsz, strerror(errno));
    1.26 +			free(wdbuf);
    1.27 +			return 1;
    1.28 +		}
    1.29 +		wdbuf = tmp;
    1.30 +		bufsz = newsz;
    1.31 +	}
    1.32 +
    1.33 +	if(!tmp) {
    1.34 +		perror("getcwd failed");
    1.35 +		free(wdbuf);
    1.36 +		return 1;
    1.37 +	}
    1.38 +
    1.39 +	puts(wdbuf);
    1.40 +	free(wdbuf);
    1.41 +	return 0;
    1.42 +}