rename
From cppreference.com
| Defined in header <stdio.h>
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| int rename( const char* old_filename, const char* new_filename ); |
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Changes the filename of a file. The file is identified by character string pointed to by old_filename. The new filename is identified by character string pointed to by new_filename.
If new_filename exists, the behavior is implementation-defined.
Contents |
[edit] Parameters
| old_filename | - | pointer to a null-terminated string containing the path identifying the file to rename |
| new_filename | - | pointer to a null-terminated string containing the new path of the file |
[edit] Return value
0 upon success or non-zero value on error.
[edit] Notes
POSIX specifies many additional details on the semantics of this function.
[edit] Example
Run this code
#include <stdio.h> #include <stdlib.h> int main(void) { FILE* fp = fopen("from.txt", "w"); // create file "from.txt" if (!fp) { perror("from.txt"); return EXIT_FAILURE; } fputc('a', fp); // write to "from.txt" fclose(fp); int rc = rename("from.txt", "to.txt"); if (rc) { perror("rename"); return EXIT_FAILURE; } fp = fopen("to.txt", "r"); if(!fp) { perror("to.txt"); return EXIT_FAILURE; } printf("%c\n", fgetc(fp)); // read from "to.txt" fclose(fp); return EXIT_SUCCESS; }
Possible output:
a
[edit] References
- C23 standard (ISO/IEC 9899:2024):
- 7.21.4.2 The rename function (p: TBD)
- C17 standard (ISO/IEC 9899:2018):
- 7.21.4.2 The rename function (p: TBD)
- C11 standard (ISO/IEC 9899:2011):
- 7.21.4.2 The rename function (p: 302-303)
- C99 standard (ISO/IEC 9899:1999):
- 7.19.4.2 The rename function (p: 268-269)
- C89/C90 standard (ISO/IEC 9899:1990):
- 4.9.4.2 The rename function
[edit] See also
| erases a file (function) | |
| C++ documentation for rename
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