Day2

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.30)
+project(Dash)
+add_executable(${PROJECT_NAME} main.c main.h file_loc.c)

README.md

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+# Syscalls used
+
+### 1. Getline()
+```cpp
+ssize_t getline(char **lineptr, size_t *n, FILE *stream);
+```
+Description: Reads a line of text from a stream. It can be a file, a pipe or standard input
+
+### 2. Fork()
+```cpp
+pid_t fork(void);
+```
+Description: Creates a child process by duplicating the calling process.
+
+### 3. Wait()
+```cpp
+pid_t wait(int *wstatus);
+```
+Description: Causes the current processes to wait until of its child process terminates.
+
+### 4. Execve()
+```cpp
+int execve(const char *pathname, char *const argv[], char *const envp[]);
+```
+Description: Execute a new programmed referred to by the `pathname` variable. Here, `argv[]` is an array of strings, `envp[]` .......................
+
+### 5. Strtok()
+```cpp
+char *stork(chat *str, const char *delim);
+```
+Description: Breaks a string into a sequence of tokens(a sequence of characters seperated by a delim)
+
+### 6. Getenv()
+```cpp
+char *getenv(const char *name);
+```
+Description: Searches the environment list to find the environment variable name.
+
+### 7. Stat()
+```cpp
+int stat(const char *pathname, struct stat *statbuf);
+```
+Description: Returns the information about the file in the buffer pointed to by the statbuf variable.
+
+### 8. Access()
+```cpp
+int access(const char *pathname, int mode);
+```
+Description: Checks whether the file `pathname` can be accessed. Mode:
+- F_OK: If file exits
+- R_OK: If file exists and grants read permissions
+- W_OK: If file exists and grants write permissions
+- X_OK: If file exists and grants execute permissions
+
+### 9. Strdup()
+```cpp
+char *strdup(const char *s);
+```
+Description: Returns a pointer to a new string which is a duplicate of the string s.
+
+# Misc
+
+#### 1. size_t, ssize_t 
+- Count of bytes. Result of `sizeof` operator.
+- Included in `<string.h>`, `<sys/types.h>`, ..., etc.
+
+#### 2. pid_t
+- Process/User/Group identifier
+- `<sys/types.h>`
+
+#### 3. perror()
+- print a system error message
+- `<stdio.h>`