lib/ccan/err/err.h

   1 #ifndef CCAN_ERR_H
   2 #define CCAN_ERR_H
   3 #include "config.h"
   4
   5 #if HAVE_ERR_H
   6 #include <err.h>
   7
   8 /* This is unnecessary with a real err.h.  See below */
   9 #define err_set_progname(name) ((void)name)
  10
  11 #else
  12 #include <ccan/compiler/compiler.h>
  13
  14 /**
  15  * err_set_progname - set the program name
  16  * @name: the name to use for err, errx, warn and warnx
  17  *
  18  * The BSD err.h calls know the program name, unfortunately there's no
  19  * portable way for the CCAN replacements to do that on other systems.
  20  *
  21  * If you don't call this with argv[0], it will be "unknown program".
  22  *
  23  * Example:
  24  *      err_set_progname(argv[0]);
  25  */
  26 void err_set_progname(const char *name);
  27
  28 /**
  29  * err - exit(eval) with message based on format and errno.
  30  * @eval: the exit code
  31  * @fmt: the printf-style format string
  32  *
  33  * The format string is printed to stderr like so:
  34  *      <executable name>: <format>: <strerror(errno)>\n
  35  *
  36  * Example:
  37  *      char *p = strdup("hello");
  38  *      if (!p)
  39  *              err(1, "Failed to strdup 'hello'");
  40  */
  41 void NORETURN err(int eval, const char *fmt, ...);
  42
  43 /**
  44  * errx - exit(eval) with message based on format.
  45  * @eval: the exit code
  46  * @fmt: the printf-style format string
  47  *
  48  * The format string is printed to stderr like so:
  49  *      <executable name>: <format>\n
  50  *
  51  * Example:
  52  *      if (argc != 1)
  53  *              errx(1, "I don't expect any arguments");
  54  */
  55 void NORETURN errx(int eval, const char *fmt, ...);
  56
  57 /**
  58  * warn - print a message to stderr based on format and errno.
  59  * @eval: the exit code
  60  * @fmt: the printf-style format string
  61  *
  62  * The format string is printed to stderr like so:
  63  *      <executable name>: <format>: <strerror(errno)>\n
  64  *
  65  * Example:
  66  *      char *p = strdup("hello");
  67  *      if (!p)
  68  *              warn("Failed to strdup 'hello'");
  69  */
  70 void warn(const char *fmt, ...);
  71
  72 /**
  73  * warnx - print a message to stderr based on format.
  74  * @eval: the exit code
  75  * @fmt: the printf-style format string
  76  *
  77  * The format string is printed to stderr like so:
  78  *      <executable name>: <format>\n
  79  *
  80  * Example:
  81  *      if (argc != 1)
  82  *              warnx("I don't expect any arguments (ignoring)");
  83  */
  84 void warnx(const char *fmt, ...);
  85 #endif
  86
  87 #endif /* CCAN_ERR_H */