likegrepΒΆ

likegrep.c

/* Ex5.6 */

#include<stdio.h>
#include<string.h>
#define MAXLINE 1000

int getline(char *line,int max);

/* find: prints lines that match the pattern from the 1st argument */

int main(int argc,char *argv[])
{
    char line[MAXLINE];
    int found = 0;

    if(argc!=2)
        printf("Usage:find pattern\n");
    else
        while(getline(line,MAXLINE)>0)
            if(strstr(line,argv[1]) != NULL)
            {
                printf("%s",line);
                found++;
            }
    return found;
}

int getline(char *s,int lim)
{
    int c;
    char *t=s;

    while(--lim > 0 && (c=getchar())!=EOF && c!='\n')
        *s++=c;

    if(c=='\n')
        *s++=c;
    *s='\0';

    return s-t;
}

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