리눅스에서 txt 파일의 특정 내용을 읽어보려고 합니다

#include <stdio.h>
 
int                 iFoundTopic;
int                 iFoundItem;
int                 iError;
long                lTopicFilePos;
char                acTopicHeading[80];
char                acLastTopicHeading[80];
char                acItemHeading[80];
char                acIniLine[160];
char                acIniPath[160];
char                acTempPath[160];
FILE                *pFIniFile;
FILE                *pFTempIni;
 
 
// readinis
// read configuration string
int readinis(char *pacPath, char *pacTopic, char *pacItem, char *pacValue) {
	int                 iItemLength;
	int                 iValueLength;
	char                *pcLastCharacter;
 
	iError = 0;
 
	strcpy(acIniPath, pacPath);
 
	// add brackets to topic
	strcpy(acTopicHeading, "[");
	strcat(acTopicHeading, pacTopic);
	strcat(acTopicHeading, "]\n");
 
	strcpy(acItemHeading, pacItem);
	strcat(acItemHeading, "=");
 
	iItemLength = strlen(acItemHeading);
 
	iFoundTopic = 0;
	iFoundItem = 0;
 
	// try to open current config file for reading
	if ((pFIniFile = fopen(acIniPath, "r")) != NULL) {
		// has the topic been found before
		if (strcmp(acLastTopicHeading, acTopicHeading) == 0) {
			iFoundTopic = 1;
			fseek(pFIniFile, lTopicFilePos, SEEK_SET);
		}
 
		// read a line from the config file until EOF
		while (fgets(acIniLine, 159, pFIniFile) != NULL) {
			// topic has not been found yet
			if (iFoundTopic == 0) {
				if (strcmp(acTopicHeading, acIniLine) == 0) {
					// found the topic
					iFoundTopic = 1;
					lTopicFilePos = ftell(pFIniFile);
					strcpy(acLastTopicHeading, acTopicHeading);
				}
				continue;
			}
			// the item has not been found yet
			if ((iFoundItem == 0) && (iFoundTopic == 1)) {
				// if newline or [, the end of the topic has been reached
				// no config value in file yet
				if ((acIniLine[0] == '\n') || (acIniLine[0] == '[')) {
					iFoundItem = 1;
					break;
				}
 
				if (strncmp(acItemHeading, acIniLine, iItemLength) == 0) {
					// found the item
					iFoundItem = 1;
					strcpy(pacValue, &acIniLine[iItemLength]);
					continue;
				}
			}
		}
		fclose(pFIniFile);
	}
	// remove trailing comment
	iValueLength = strlen(pacValue);
	while (iValueLength) {
		if (*(pacValue + iValueLength) == '#') {
			*(pacValue + iValueLength) = '\0';
		}
		iValueLength--;
	}
	// remove trailing white space
	while ((iValueLength = strlen(pacValue)) > 0) {
		pcLastCharacter = (pacValue + iValueLength - 1);
		if ((*pcLastCharacter == ' ')
			|| (*pcLastCharacter == '\n')
			|| (*pcLastCharacter == '\r')
			|| (*pcLastCharacter == '\t')
			|| (*pcLastCharacter == '\v')
			|| (*pcLastCharacter == '\a')
			|| (*pcLastCharacter == '\b')
			|| (*pcLastCharacter == '\f')) {
			*pcLastCharacter = '\0';
		}
		else {
			break;
		}
	}
 
	return (iError);
}
 
 
int main()
{
	char acValue[160];
	acLastTopicHeading[0] = '\0'; // initialize
	readinis("test.txt", "test", "value", acValue);
	printf("%s\n", acValue);
 
	getchar();
 
	return 0;
}