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86 lines
1.2 KiB
C
86 lines
1.2 KiB
C
static __attribute__((used)) char* rcsid = "$CVSHeader$";
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/*
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*
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* (c) 2004 Laurent Vivier <LaurentVivier@wanadoo.fr>
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*
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include "libemile.h"
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int emile_get_uncompressed_size(char *file)
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{
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int ret;
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int i;
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int tube[2];
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char buffer[1024];
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char *uncompressed;
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ret = pipe(tube);
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if (ret == -1)
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return -1;
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if (fork() == 0)
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{
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/* child */
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close(tube[0]);
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close(STDOUT_FILENO);
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dup(tube[1]);
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close(STDERR_FILENO);
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execlp("gzip", "gzip", "-l", file, NULL);
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/* never comes here ... */
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exit(1);
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}
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/* parent */
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close(tube[1]);
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ret = read(tube[0], buffer, 1024);
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if (ret <= 0)
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return -1;
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/* skip first line */
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i = 0;
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while ( (buffer[i] != '\n') && (i < 1024))
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i++;
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i++; /* skip '\n' */
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/* skip space */
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while ( (buffer[i] == ' ') && (i < 1024))
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i++;
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/* skip compressed size */
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while ( (buffer[i] >= '0') && buffer[i] <= '9' && (i < 1024))
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i++;
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buffer[i++] = 0;
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/* skip space */
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while ( (buffer[i] == ' ') && (i < 1024))
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i++;
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/* get uncompressed size */
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uncompressed = &buffer[i];
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while ( (buffer[i] >= '0') && buffer[i] <= '9' && (i < 1024))
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i++;
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buffer[i++] = 0;
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close(tube[0]);
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return atoi(uncompressed);
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}
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