lsflib/src/get_line.c
author Markus Brökers <mbroeker@largo.homelinux.org>
Tue, 17 Aug 2010 18:57:57 +0200
changeset 139 cb1d3f4cf18e
parent 121 fef2ccfa7b12
child 158 2cddd4d26139
permissions -rw-r--r--
execve returns a value on error and this catches it
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/**
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 * lsflib/src/get_line.c
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 * Copyright (C) 2008 Markus Broeker
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <lsf/lsf.h>
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#ifndef LINE_LENGTH
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#define LINE_LENGTH 100
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#endif
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char *get_line (const char *filename, const char *cmd, size_t size)
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{
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    int i, j;
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    char *line, *ptr;
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    FILE *f = fopen (filename, "r");
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    if (!f) {
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        perror ("FOPEN:");
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        return NULL;
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    }
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    line = malloc (LINE_LENGTH + 1);
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    ptr = malloc ((LINE_LENGTH + 1) * size);
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    i = 0;
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    while (fgets (line, LINE_LENGTH, f) != NULL) {
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        if (strstr (line, cmd)) {
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            do {
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                if ((strlen (ptr) + strlen (line)) < LINE_LENGTH * size) {
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                    strcat (ptr, line);
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                    fgets (line, LINE_LENGTH, f);
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                    i++;
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                } else {
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                    printf ("OVERFLOW: [%d]: %s\n", i * LINE_LENGTH, line);
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                    exit (0);
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                }
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            } while (strchr (line, '"') == NULL);
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            if (i > 1)
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                strcat (ptr, line);
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        }
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        for (i = 0; i < strlen (ptr); i++)
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            switch (ptr[i]) {
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            case '\n':
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            case '\\':
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            case '"':
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                for (j = i; j < strlen (ptr) - 1; j++)
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                    ptr[j] = ptr[j + 1];
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                ptr[j] = 0;
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                break;
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            }
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    }
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    fclose (f);
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    free (line);
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    return ptr;
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}