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| author | Alejandro Colomar <alx@kernel.org> | 2025-08-19 17:48:50 +0200 |
|---|---|---|
| committer | Alejandro Colomar <alx@kernel.org> | 2025-08-20 18:14:03 +0200 |
| commit | 0e7a39804a3c017a209117fc2243c6cbb543dede (patch) | |
| tree | 91e0b287d8b826d668c3d8118347f07cc8b8964a /man/man2/mmap.2 | |
| parent | e2d3f14fe40ad90a1fedf0fcd27e6cc896c49a7a (diff) | |
| download | man-pages-0e7a39804a3c.tar.gz | |
man/: EXAMPLES: Use err(3) and errc(3bsd) instead of similar macros
These functions are quite portable. And if one doesn't have them for
some reason (but libbsd has been ported to many systems), one can write
them easily as macros, anyway.
Signed-off-by: Alejandro Colomar <alx@kernel.org>
Diffstat (limited to 'man/man2/mmap.2')
| -rw-r--r-- | man/man2/mmap.2 | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/man/man2/mmap.2 b/man/man2/mmap.2 index 28ad07198a..23ffcd758c 100644 --- a/man/man2/mmap.2 +++ b/man/man2/mmap.2 @@ -948,6 +948,7 @@ to output the desired bytes. .SS Program source .\" SRC BEGIN (mmap.c) .EX +#include <err.h> #include <fcntl.h> #include <stdio.h> #include <stdlib.h> @@ -956,9 +957,6 @@ to output the desired bytes. #include <sys/types.h> #include <unistd.h> \& -#define handle_error(msg) \[rs] - do { perror(msg); exit(EXIT_FAILURE); } while (0) -\& int main(int argc, char *argv[]) { @@ -976,10 +974,10 @@ main(int argc, char *argv[]) \& fd = open(argv[1], O_RDONLY); if (fd == \-1) - handle_error("open"); + err(EXIT_FAILURE, "open"); \& if (fstat(fd, &sb) == \-1) /* To obtain file size */ - handle_error("fstat"); + err(EXIT_FAILURE, "fstat"); \& offset = atoi(argv[2]); pa_offset = offset & \[ti](sysconf(_SC_PAGE_SIZE) \- 1); @@ -1003,12 +1001,12 @@ main(int argc, char *argv[]) addr = mmap(NULL, length + offset \- pa_offset, PROT_READ, MAP_PRIVATE, fd, pa_offset); if (addr == MAP_FAILED) - handle_error("mmap"); + err(EXIT_FAILURE, "mmap"); \& s = write(STDOUT_FILENO, addr + offset \- pa_offset, length); if (s != length) { if (s == \-1) - handle_error("write"); + err(EXIT_FAILURE, "write"); \& fprintf(stderr, "partial write"); exit(EXIT_FAILURE); |