Thread: sprintf f open pattern

Greetings.

I'm writing a program that opens files given by /route/file_name. Such program receives the file_name via stdout from bash, i.e ./main < <(ls ../script/) where ls ../script/ gives the output dummy0.log, dummy1.log ... dummyn.log

Code:

#include <stdio.h>
#include <string.h>

#include "search.h"
#include "dbg.h"

int search_line(void){
    char file_name[BUFSIZE];
    char route_name[BUFSIZE];
    int c;

    FILE *log;

    /* Reads file_name from stdout */
    while (fgets(file_name, BUFSIZE, stdin) != NULL){
        
        /* Only read file if such has *.log filetype */
        if ( is_approved_type(file_name) ){
           
            /* Variable subtitution pattern */
            sprintf(route_name, "../script/%s", file_name);
            
            /* Does not work, 
             * in gdb, command 'printf "%s", route_name" gives       
             * "../script/dummy0.log" */
            log = fopen(route_name, "r");
           
           /* The following does work and opens file
            * log = fopen(../script/dummy0.log */            

            /* Checks stream related errors*/
            check(log, "Error opening %s", route_name);

            /*  Checks all file's content */
            while(1){
                c = fgetc(log);

                if ( feof(log) )
                    break;

                printf("%c", c);
            }

            /* Close stream */
            fclose(log);

            /* Error code */
            error:
                if (log)
                    fclose(log);
                return -1;
        }
    }

    return 0;
}

Being more specific, every time I use sprintf to make the variable substitution I get the following error: "errno: No such file or directory" whereas using hard-coded fopen filename executes the program correctly.

As far I see the string "route_name" is identical to ../script/dummy0.log so, why is this program complaining once I'm using variable substitution?

Any help is greatly appreciated.

You're right, That was the problem. Thanks to you good sir